Exceptional Reliability

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2 Why Choose Us... As a recognized leader in the manufacture of highquality optical filters and coatings, Andover Corporation has built an international reputation by consistently raising the bar both for our products and for our people. We take it as a personal challenge to innovate along with our customers, designing and delivering precision solutions for use in chemical analysis, machine vision, medical diagnostics, astronomy and analyzers (air, water, and gas). Whether you need custom filters or offtheshelf products, you have our guarantee of excellent craftsmanship, exceptional performance, and unsurpassed service with every order. Large or small, domestic or foreign, the companies that purchase our products consistently tell us that they value the following key Andover advantages: Custom Design Expertise Our talented and highly skilled engineers can meet your most demanding requirements for custom filters and coatings. With more than years in business, we ve designed products for advanced applications such as medical instrumentation, machine vision, fluorescence studies, astronomical observation, telecommunications, and spaceborne and defense systems. Exceptional Reliability Andover s filters and coatings far exceed the industry standards for quality and performance. This precision reflects the fact that Andover Corporation is one of the few optical filter manufacturers in the world to design our own stateoftheart equipment that allows us to control the entire production process. Extensive Standard Offering Andover maintains an inventory of over a thousand different optical filters. Bandpass, Dichroic, Edge, Heat Control, and Calibration filters are just a few of the product categories that are in stock and ready for immediate shipping. techstaff@andovercorp.com Andover Corporation Commercial Drive Salem, New Hampshire 798 Tel: Fax: US tollfree: International:

3 CONTENTS Thank you for your interest in our latest catalog of products and services. We value your patronage and take great pride in responding quickly to any questions you may have, especially if you require a customized solution. If there is a filter or coating you need but don t see available, please contact us. We also welcome any comments you might have about how we may better serve you. The Andover Corporation Team Thank you! Extras Making the Difference Unlike most optical filter and coating manufacturers, we supply exact spectral curves and digital data with most orders at no additional charge, saving you the cost of incoming quality control. We ll even help you reduce inventory by shipping your order only when you require it. Frequently Asked Questions... Coating Capabilities Dichroic Coatings... Neutral Density Filters... Specialized Coatings...5 AntiReflective (AR) Coatings....5 Bandpass Filters....5 Custom Advantage Optical Polishing....6 Engineering Assistance...6 Optical Fabrication...6 Machine Fabrication...6 Quality Control...7 Optical Testing...7 Image Quality Filters....8 Success Stories...9 About Bandpass Filters Environmental Considerations Basic Filter Types...11 Standard & HighTransmitting Bandpass Filters Products...1 Hard Coat Narrowband Filters Products... Hard Coat Broadband Filters Products... SemiCustom Bandpass Filters Products...6 Astronomy UBVRI Filters UBVRI... Metallic Neutral Density Filters Products... Absorptive Neutral Density Filters Products... Neutral Density Sets Metallic & Absorptive Sets...5 Heat Control Filters Hot Mirror...6 Ultraviolet Cold Mirror....7 Cold Mirror...7 8nm Cold Mirrors...7 Infrared Suppressing...7 Dichroic Filters Products...8 Sets... Edge Filters Products... Long Wave Pass.... Short Wave Pass... SteepEdge Longpass Filters Long Wave Pass.... Infrared Filters & Coatings Infrared Windows and Substrates...6 Broadband AR Coatings on IR Substrates..8 Standard IR Long Wave Pass Filters.. Standard IR Bandpass Filters....5 IR Neutral Density Filters...5 Custom IR Coatings... Colored Glass General Bandpass Type Heat Absorbing Type...58 Long Wave Pass Type...58 Calibration Filter Sets AC9... AC19... Accessories Threaded Rings...61 Filter Wheels....6 Temperature Controller....6 Epolite FH51 Epoxy Glossary...68 Int l Representatives....7 Index (Alphabetical)...7 Ordering Information.. Back Cover 1

4 Andover Corporation Andover Corporation was established in 1976 with the purpose of designing and manufacturing highquality optical filters and coatings. As the company grows, our focus remains on quality. Our current facility spans, square feet on 17 acres of land in Salem, NH. Our facility is customdesigned and stateoftheart, and includes automated coating, glass polishing, and fabrication equipment. Our testing capabilities are extensive, comprising of both automated spectrophotometers for broadband spectral measurements, and ultrahighresolution spectrophotometers for narrowband measurements. Our optical metrology lab features a customdesigned, computercontrolled tunable interferometer to measure transmitted wavefronts beyond the capabilities of a traditional laser interferometer. We manufacture filters and coatings for a wide variety of applications; including medical instrumentation, fluorescence studies, machine vision, astronomical observation, telecommunications, spaceborne systems and defense systems. Andover Corporation Order online: Call tollfree in the US:

5 Frequently Asked Questions How do you distinguish between an image quality and a commercial quality filter? Image quality filters are ideal for applications that require high resolution, such as astronomical observations. To make these products, we polish highquality optical glass to ensure the substrate is extremely flat and parallel, and then apply antireflective coatings on the external surfaces to reduce ghost images and maximize energy throughput. Commercial quality filters have the same spectral characteristics as image quality filters, however they are designed for use in instruments rather than imaging applications. What do I need to do to maintain my filters in good condition? We recommend cleaning your filters about every three months. If the environment is particularly dusty or you often shift the filters between applications, more regular cleaning may be warranted. We suggest that you apply acetone, methanol, or alcohol to a soft tissue and then rub the filter using a circular motion. When can I expect to receive my order? Standard products ship within two to three days of receipt of order. Do you offer discounts on surplus stock? Andover offers generous price terms on our surplus inventory. Just visit our website at com/surplus and plug in the desired wavelength to see what s available. Do you have a minimum order value / quantity? No minimum value or quantity required. How do I send custom specifications for quoting? You can do this one of two ways: 1. your request to sales@andovercorp.com.. Fax your specifications to Attn: Technical Sales Dept.. Call tollfree: Are there any particular environmental conditions to consider when using a filter? It s important to avoid prolonged exposure to high humidity and large temperature variations. To reduce the risk of damage due to thermal shock, we recommend a maximum operating temperature of 7 C and a maximum temperature change of 5 C per minute. When placing an order, why do I need to include the operating temperature? The center wavelength of an interference filter shifts linearly with changes in ambient temperature. Our filter designs take this into consideration to ensure proper performance at your specific operating temperature. Questions? techstaff@andovercorp.com Frequently Asked Questions

6 Coating Capabilities Variety of coating technologies to suit any need Wavelengths from 19nm to 1µm Custom coatings on a wide variety of substrates Coating Capabilities Andover Corporation has the unique ability to provide a diverse range of coatings spanning a broad wavelength range on a wide variety of materials. We produce coatings for a multitude of applications, ranging from environmental monitoring to spacebased astronomy. Our AS91 certification ensures compliance with aerospace as well as military standards. Coating Technologies Andover has at its disposal a variety of coating technologies, including magnetron sputtering, ionassisted electron beam deposition and thermal evaporation, producing the best possible solutions for your needs. Stateoftheart, customdesigned and computercontrolled coating chambers ensure accuracy and repeatability. Dichroic Coatings Andover designs and produces custom dichroic coatings for a variety of applications. Our inhouse engineers can design exotic coatings to meet very stringent spectral and environmental requirements. As with all of our coatings, they can be applied to a wide variety of materials, in a myriad of shapes and sizes. Neutral Density Filters Andover is a leader in flat response neutral density filters in the UV to near infrared (nmnm) and far infrared (1nm). These coatings are hard and pinholefree. Our ND Filters exhibit industryleading spectral neutrality over a broad wavelength range, with optical densities up to.. Andover Corporation Order online: Call tollfree in the US:

7 Specialized Coatings With our computercontrolled systems, we can quickly produce a variety of highquality coatings in sizes up to mm with excellent repeatability using any process from thermal evaporation to magnetron sputtering. AntiReflective AR Coatings Bandpass Filters Andover produces hard oxide AR coatings from 19nm to 1µm. We routinely coat customersupplied material in all shapes and sizes: lenses, prisms, flats, domes, etc. We can coat a wide variety of materials, ranging from typical optical glass to exotic materials such as Calcium Fluoride, Zinc Sulfide and Zinc Selenide. The hard coatings not only reduce reflections to <.1% at angles up to, but also help protect optical surfaces, as the coating is more durable than the uncoated substrate. Questions? techstaff@andovercorp.com We produce bandpass filters over a much broader range than any other coating firm, from 19nm to 1µm in wavelength. Bandwidths range from very wide, (> 1%) to extremely narrow, (<.%). We can produce semicustom bandpass filters with short lead times. We also have over 1, standard, offtheshelf bandpass filters. Coating Capabilities 5

8 Custom Advantage Fullyautomated systems for excellent repeatability and rapid turnaround Continuously updated manufacturing processes Products that far exceed industry standards for quality Custom Advantage While stocking over 1, standard filters, Andover Corporation has built a worldwide reputation for developing custom, often stateoftheart, filters and coatings. With our extensive engineering experience and advanced manufacturing facility, we control the entire production process to ensure that you receive only the highestquality products, attentive service, and timely delivery. Optical Polishing Andover s inhouse polishing facility can achieve flatness up to λ/1 wave per inch and parallelism of 5 arc seconds or better, with a surface quality of /1. Engineering Assistance Andover s inhouse engineering staff can provide innovative assistance in optical and mechanical design, to ensure the success of your project. Optical Fabrication Whether you require a filter that s mm or mm, Andover has fully automated CNC equipment to fabricate exactly what you need, at the quality you expect, and using the optical material of your choice. Machine Fabrication Andover s axis machining centers allow us to fabricate complex tooling quickly and accurately, greatly reducing the lead time for custom components. 6 Andover Corporation Order online: Call tollfree in the US:

9 Andover Corporation s quality testing starts with the raw material and continues through the finished product. Total Quality Control To ensure total quality control, most of our equipment is either custom designed or custom constructed to our exact specifications. Utilizing the Cary 7 spectrophotometer, Andover is able to measure absolute specular reflection over a wide range of angles, facilitating very accurate measurements of dichroic cube beamsplitter performance, and other complex measurements. We check all filter glass for striae, bubbles and inclusions using our tunable interferometer and customdesigned inclusion tester. These instruments detect minute defects, even in materials that do not transmit visible light. StateoftheArt Testing Our inhouse environmental chambers allow us to perform routine and custom product testing at temperatures from 6 C to over C. This, along with the ability to vary humidity levels, ensures compliance with your custom specification or MIL standard. Most interferometers rely on laser light to produce interference fringes. Many bandpass filters cannot be measured with these instruments, as they do not transmit the laser wavelength. To solve this problem, we have constructed a computerized, tunable white light interferometer that produces actual transmitted wavefront interferograms of filters at any wavelength in the range of nm 11nm. Questions? techstaff@andovercorp.com Custom Advantage 7

10 Image Quality Filters For demanding custom imaging requirements Image quality filters are ideal for applications that require high resolution, such as astronomical observations, video monitoring systems, highresolution photography, and other imaging applications. To meet these demanding requirements, Andover Corporation has developed a line of custom Image Quality (IQ) filters using highgrade optical material that is both striation and inclusionfree. The surfaces are ground and polished to a transmitted wavefront of λ/ per inch and parallel to arc seconds or better. The internal coating positions are optimized and the exterior surfaces are antireflection coated to eliminate multiple images and fringe patterns, maximizing energy throughput. For very highresolution applications, we can also provide image quality filters with a transmitted wavefront of λ/1 and parallelism of 1 arc seconds. While commercial quality filters can have the same spectral characteristics as image quality filters, they are designed for use in instruments rather than imaging applications. ANTIREFLECTIVE COATINGS All Image Quality Filters include an antireflective (AR) coating. AR coatings are an effective way to limit reflections while also improving optimal system performance. Andover Corporation manufactures a variety of antireflective coatings designed for high efficiency, mechanical durability, and environmental stability. % Reflectance BROADBAND VISIBLE ANTIREFLECTION Uncoated Coated Wavelength (nm) All filters come with test documentation 8 Andover Corporation Order online: Call tollfree in the US:

11 Success Stories A few examples of Andover's notable achievements The Interface Region Imaging Spectrograph (IRIS) The IRIS mission is dedicated to understanding the interface between the photosphere and corona, by tracing the flow of energy and plasma through the chromosphere and transition region into the corona using spectrometry and imaging. It launched on June, 8 1. MErcury Surface, Space ENvironment, GEochemistry and Ranging (MESSENGER) MESSENGER launched on August,. Its mission is to analyze the surface of Mercury, to better understand our own planet. It carries seven instruments, one of which is the Mercury Dual Imaging System (MDIS), a camera with wide and narrow fieldsofview, for monochrome, color and stereo imaging. Helioseismic and Magnetic Imager (HMI) The primary goal of the HMI investigation is to study the origin of solar variability and to characterize and understand the Sun s interior and the various components of magnetic activity. The HMI investigation is based on measurements obtained with the HMI instrument as part of the Solar Dynamics Observatory (SDO) mission. The Atmospheric Imaging Assembly (AIA) for the Solar Dynamics Observatory (SDO) SDO is designed to provide an unprecedented view of the solar corona, taking images that span at least 1. solar diameters in multiple wavelengths nearly simultaneously, at a resolution of about 1 arcsec and at a cadence of 1 seconds or better. These data will significantly improve our understanding of the physics behind the activity displayed by the Sun s atmosphere, which drives space weather in the heliosphere and in planetary environments. Stratospheric Observatory for Infrared Astronomy (SOFIA) SOFIA is the largest airborne observatory in the world, consisting of an extensively modified Boeing 77SP aircraft carrying a reflecting telescope with an effective diameter of.5 meters (1 inches). It is capable of making observations that are impossible for even the largest and highest groundbased telescopes. The Michelson Doppler Imager (MDI) MDI is part of an international collaboration to study the interior structure and dynamics of the Sun. The MDI team was responsible for the design and fabrication, and now for the operation, of the MDI instrument on board the SOlar and Heliospheric Observatory (SOHO) spacecraft. The Crosstrack Infrared Sounder (CrIS) CrIS is a Michelson interferometer infrared sounder that is part of the Crosstrack Infrared Microwave Sounding Suite (CrIMSS). The objective of CrIMSS is to provide global three dimensional soundings of atmospheric temperature and moisture as well as provide data on other geophysical parameters. Questions? techstaff@andovercorp.com Custom Advantage 9

12 About Bandpass Filters About Bandpass Filters The use of bandpass filters is one of the simplest and most economical ways to transmit a welldefined band of light and to reject all other unwanted radiation. Their design is essentially a thin film FabryPerot interferometer formed by vacuum deposition, and consists of two reflecting stacks separated by an evenorder spacer layer. Because the FabryPerot filter is Lorentzian in shape, the cuton and cutoff slopes are shallow and the rate of attenuation in the outofband blocking range is slow. To improve the slopes and increase the attenuation in the blocking band, we introduce more cavities into the construction of our standard dielectric bandpass filters. Environmental Considerations Ambient temperature and optical path geometry are important factors to consider in selecting or specifying bandpass filters. Temperature Coefficient (nm/ C) Ambient Temperature The center wavelength of a bandpass filter shifts linearly with changes in ambient temperature up with a positive change and down with a negative change. The temperature coefficient chart below gives a good approximation of the shift in wavelength for a given temperature change. To counter these effects, Andover has developed Temperature Controllers that help to maintain the ambient temperature of bandpass filters. (For more information see page 6 (Temperature Controller). TEMPERATURE WAVELENGTH SHIFT COEFFICIENT Center Wavelength (nm) Angle of Incidence The central wavelength of the alldielectric FabryPerot filter shifts lower with an increase in the incident angle. The amount of shift depends upon the incident angle and the filter s effective index (N*). This feature can be very useful when tuning a filter to the desired central wavelength. Use the formula below to determine the wavelength shift of a filter in collimated light with incident angles up to 15. Where: λ θ = λ [1 ( Ne ) Sin θ ] 1 N* λ θ = Wavelength at angle of incidence λ = Wavelength at normal incidence Ne = Refractive index of external medium N* = Effective refractive index of the filter θ = Angle of incidence When using a filter with noncollimated light, the wavelength shift will appear somewhat less than that of collimated light at the same angle. In a cone of light, only the central ray is normal to the surface while all others are increasingly offangle. To approximate the shift for a cone, use this same formula but use / of the max. cone angle. For example, for a 15 cone, use an angle of 1 in the above formula. Andover Corporation Order online: Call tollfree in the US:

13 Spectral Profiles for Andover s 1 Basic Filter Types Type 1 1 CAVITY Type CAVITIES Type CAVITIES 1..9 x Peak Tx Nom.5 x FWHM 1..9 x Peak Tx Nom.5 x FWHM 1..9 x Peak Tx Nom.65 x FWHM.5 x Peak Tx FWHM.5 x Peak Tx FWHM.5 x Peak Tx FWHM % Normalized Transmittance Nom x FWHM Nom 1 x FWHM Nom x FWHM % Normalized Transmittance Max 15. x FWHM Nom. x FWHM Nom.5 x FWHM Nom 6. x FWHM % Normalized Transmittance Nom 5. x FWHM Nom 1.5 x FWHM Nom. x FWHM Nom. x FWHM Nom 15. x FWHM Wavelength Wavelength Wavelength Type 5 Type CAVITIES 5 CAVITIES Type 6 6 CAVITIES 1..9 x Peak Tx Nom.8 x FWHM 1..9 x Peak Tx Nom.85 x FWHM 1..9 x Peak Tx Nom.85 x FWHM.5 x Peak Tx FWHM.5 x Peak Tx FWHM.5 x Peak Tx FWHM % Normalized Transmittance Nom 1. x FWHM Nom 1.8 x FWHM Nom.5 x FWHM 1 Nom.5 x FWHM % Normalized Transmittance Nom 1.5 x FWHM Nom 1.65 x FWHM Nom 1.95 x FWHM 1 Nom.85 x FWHM % Normalized Transmittance Nom 1.18 x FWHM Nom x FWHM Nom 1.95 x FWHM 1 Nom. x FWHM Nom 1. x FWHM Nom 1. x FWHM Nom 5. x FWHM Wavelength Wavelength Wavelength FILTER TYPES 16 REPRESENT UNBLOCKED FILTER PROFILES. BANDSHAPE MAY VARY DEPENDING UPON LEVEL OF ADDITIONAL BLOCKING Normalized Transmittance Full Bandwidth Multiplier (Nominal) of Peak (%) 1 Cavity Cavities Cavities Cavities 5 Cavities 6 Cavities 9..5 nom..5 nom undefined undefined undefined Questions? techstaff@andovercorp.com About Bandpass Filters 11

14 MDM filters are a special type of bandpass filter utilizing dielectric layers (D) surrounded by metallic layers (M). They provide excellent throughput over a wide spectral range, while providing good outofband blocking. 1. Type 7 MDM 1nm BANDWIDTH Type 8 1. MDM 5nm BANDWIDTH % Normalized Transmittance x Peak Tx.9 x CW/L.9 x CW/L.85 x CW/L CW/L FWHM 1.5 x CW/L 1.7 x CW/L 1.1 x CW/L 1.5 x CW/L % Normalized Transmittance x Peak Tx.85 x CW/L.8 x CW/L.7 x CW/L CW/L FWHM 1.1 x CW/L 1. x CW/L 1.5 x CW/L. x CW/L Wavelength Wavelength 1. Type 9 MDM 17nm BANDWIDTH Type 1 1. MDM 81nm BANDWIDTH % Normalized Transmittance x Peak Tx FWHM.5 x Peak Tx FWHM.8 x CW/L 1.5 x CW/L x CW/L 1. x CW/L.75 x CW/L 1. x CW/L.1.8 x CW/L 1.5 x CW/L CW/L CW/L.7 x CW/L 1.65 x CW/L.1.75 x CW/L 1.6 x CW/L.1 Wavelength % Normalized Transmittance Wavelength Andover Corporation Order online: Call tollfree in the US:

15 Bandpass Filter Selection Guide There are a number of variations of a bandpass filter s construction, and each has its advantages. Andover offers a variety of options so that you can select what is bestsuited for your application. Standard Bandpass (Pages 11) Andover s Standard Bandpass filters have been the mainstay of the industry for decades. With our proprietary stabilization and sealing method these filters will generally last for 1 years in the field. Their longevity, coupled with their low cost and ready availability, make these a great choice for most applications. HighTransmitting Bandpass (Pages 11) Andover s HighTransmitting Bandpass filters are a variant of the Standard Bandpass filter line. Designed for use with PMTs and photodiodes, they employ only dielectric coatings, and have a blocking range tailored to the detector. This results in higher transmission than their fullyblocked counterparts. For your convenience, the hightransmitting bandpass filters are listed in the Standard Bandpass section, and are highlighted for easy identification. SemiCustom Bandpass (Pages 69) In order to make it simple for customers to customtailor a bandpass filter for their application, Andover offers a line of SemiCustom bandpass filters. Their construction is similar to both the Standard Bandpass and HighTransmitting bandpass filter offerings. We offer a wide selection of wavelengths, bandwidths and sizes, and offer two blocking options. HardCoated Narrowband (Pages ) Andover offers one of the broadest ranges of hardcoated narrowband filters in the industry. Our filters feature very high transmission, and dense blocking from UV1nm. They are suitable for hightemperature applications. HardCoated Broadband (Pages 5) This line of hard, firstsurface coated filters was designed to cover the standard Raman spectroscopy lines. They feature very high transmission over a broad range. The chart below summarizes the major features of the various types of filters listed above, to aid in quickly locating the type that is best suited for your application. Please refer to the appropriate section of the catalog for more detailed information, or, if you would like advice from our technical sales staff, please contact us at techstaff@andovercorp.com. Construction Key Attributes Standard Bandpass Filters Pages 11 Softcoated, laminated HighTransmitting Bandpass Filters Pages 11 Softcoated, laminated Bandpass Filter Types SemiCustom Bandpass Filters Pages 69 Softcoated, laminated HardCoated Narrowband Filters Pages Hard, firstsurface coatings HardCoated Broadband Filters Pages 5 Hard, firstsurface coatings Wavelength range 19nm nm 5.8nm 15nm 1nm nm nm 15nm 5nm 785nm Bandwidths 1nm 1nm 1nm nm.15nm 8nm 1nm 8nm nm Blocking Sizes Features: OD, UV 1.5mm, 5mm and mm dia. OD, UV8nm or 1nm 1.5mm, 5mm and mm dia. Low cost OD, UV1nm or UV 1.5mm, 5mm and mm dia. Varies by W/L 5mm dia. OD, UV1nm 1.5mm, 5mm and mm dia. Available from stock HighTransmission Highly customizeable First surface coatings Suitable for high temperatures Questions? techstaff@andovercorp.com About Bandpass Filters 1

16 Standard & HighTransmitting Bandpass Filters Standard Bandpass Filters Andover offers one of the most extensive selections of bandpass filters in the industry, including many of the primary laser, atomic emission, biomedical, and analytical spectral lines. General Specifications Wavelengths from the ultraviolet through the infrared Stabilized to prevent drift of peak wavelength over time Hermetically sealed and protected by an anodized aluminum ring Transmission as high as 8% We use a proprietary method to stabilize our products to prevent drift of peak wavelength with age and hermetically seal each filter for maximum protection against humidity. Each filter is mounted in a black anodized aluminum ring, adding further protection against chipping, scratching, and moisture penetration. HighTransmitting Bandpass Filters We also offer a HighTransmitting variant of our standard bandpass filter selection. By tailoring the blocking range to match the detector, we can provide maximum possible throughput while maintaining good blocking to meet the customer s needs. Wavelengths include all popular laser, mercury, biomedical and analytical spectral lines. Diameter Tolerance: +/.5nm Usable Aperture: Filter Size Usable Aperture 1.5mm Ø 9.mm Ø 5.mm Ø 1.mm Ø.mm Ø 5.mm Ø Surface Quality: 8 (Per MILPRF18B) Optical Quality: Commercial instrumentation grade OutofBand Blocking: 1 x 1 avg. from Xray to Specification Temperature: +ºC Max. Survival Temp Range: CW/L 18nm ºC to +ºC CW/L 8.1nm ºC to +7ºC Humidity Resistance: Per MILC897A Mechanical: Mounted in an anodized aluminum ring Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Spectral Radiometry Medical Diagnostics Chemical Analysis Colorimetry 1 Can t find what you need? Scan the QR code to browse our surplus product line, or us at sales@andovercorp.com. Andover Corporation Order online: Call tollfree in the US:

17 STANDARD & HIGHTRANSMITTING BANDPASS FILTERS Min. Nom. Blocked High CWL FWHM T Thk. from UV Size, Shape & Part Number Trans. Line (nm) (nm) Type (%) n* (mm) to (nm) 1.5mm Ø 5mm Ø mm Ø 19. ±.5. + /1 15 ± FS151.5 FS FS155 FS15 19FS15 FS1 Zn Zn 1. + /1 1. ±. + /1 ± FS11.5 1FS1.5 FS11.5 1FS15 1FS5 FS15 1FS1 1FS FS1 Cd Cd Ni 8. + /1 8. ±. + /1 5 ± FS11.5 8FS51.5 FS11.5 8FS15 8FS55 FS15 8FS1 8FS5 FS1 Co Co HeCd Laser 9. + /1 9. ± ± FS11.5 9FS51.5 8FS11.5 9FS15 9FS55 8FS15 9FS1 9FS5 8FS1 Hg Hg Hg /1 5.7 ± ± 5 ± FS11.5 5FS51.5 5FS1.5 5FS15 5FS55 5FS5 5FS1 5FS5 5FS Hg Hg. + / /1 65. ± 5 ± FS FS FS51.5 FS15 65FS15 65FS55 FS1 65FS1 65FS5 Hg Hg Hg Hg 7. + / / /1 8. ± 5 ± FS FS11.5 8FS11.5 8FS51.5 7FS15 75FS15 8FS15 8FS55 7FS1 75FS1 8FS1 8FS5 Hg Hg / /1. + / FS FS11.5 FS FS15 97FS15 FS15 89FS1 97FS1 FS1 Zn. ±. + 1/ /1 5 ± 5 ± FS51.5 FS1.5 7FS11.5 FS55 FS5 7FS15 FS5 FS 7FS1 Zn Hg 7.1 ± 1. + / /1 5 ± FS51.5 1FS11.5 1FS11.5 7FS55 1FS15 1FS15 7FS5 1FS1 1FS1 Hg Cd 1. ±. + / / 5 ± 5 ± FS51.5 FS11.5 6FS1.5 1FS55 FS15 6FS5 1FS5 FS1 6FS Cd Cd / 6.1 ±. + /1 5 ± FS11.5 6FS51.5 FS11.5 6FS15 6FS55 FS15 6FS1 6FS5 FS1 Hg N Laser N Laser. + / / / ± FS11.5 7FS1.5 7FS11.5 FS15 7FS5 7FS15 FS1 7FS 7FS1 biomed biomed biomed. + /. + /1. ± 8 ± 5 ± FS81.5 FS11.5 FS51.5 FS85 FS15 FS55 FS8 FS1 FS5 NdYAG Laser. + / FS11.5 FS15 FS1 MDM= MetalDielectricMetal Questions? techstaff@andovercorp.com Standard & HighTransmitting Bandpass Filters 15

18 STANDARD & HIGHTRANSMITTING BANDPASS FILTERS Min. Nom. Blocked High CWL FWHM T Thk. from UV Size, Shape & Part Number Trans. Line (nm) (nm) Type (%) n* (mm) to (nm) 1.5mm Ø 5mm Ø mm Ø. ±. ± 5 5 ± 5 ± FS51.5 FS1.5 FS55 FS5 FS5 FS Hg. + /. + / / 5 ± FS11.5 FS FS51.5 FS15 FS15 65FS55 FS1 FS1 65FS5 Hg / FSX FSX15 65FSX1 Hg Hg Ni / 65. ± 7. + /1 5 ± FS FS51.5 7FS FS15 65FS55 7FS15 65FS1 65FS5 7FS / /1. + / FS11.5 9FS11.5 FS11.5 8FS15 9FS15 FS15 8FS1 9FS1 FS1. ±. + 1/. + /1 ± ± 8 7 ± FS1.5 FS1.5 FS71.5 FS5 FS5 FS75 FS FS FS7 Hg Hg.7 + 1/.7 + / 1. + /1 5 ± FS51.5 5FS11.5 1FS11.5 5FS55 5FS15 1FS15 5FS5 5FS1 1FS /. + /1. + / FS11.5 FS11.5 FS FS15 FS15 FS15 15FS1 FS1 FS1 Hg Hg / / 5 ± FS51.5 6FS11.5 6FS55 6FS15 6FS5 6FS1 Hg / 7 8 6FSX11.5 6FSX15 6FSX1 HeCd Laser HeCd Laser HeCd Laser. + / / / / 1 ±. ± FS11.5 FS1.5 FS1.5 FS11.5 FS15 FS5 FS5 FS15 FS1 FS FS FS1 HeCd Laser / 75 8 FSX11.5 FSX15 FSX1. + /1 5 FS11.5 FS15 FS1. + / FSX11.5 FSX15 FSX1. ± ± FS1.5 FS5 FS. ± ± 75 8 FSX1.5 FSX5 FSX. + 1/ ± 8 FS1.5 FS5 FS. + 1/ ± FSX1.5 FSX5 FSX Cs ArIon Laser ArIon Laser ArIon Laser. + /1.5 + / / / / 8 ± 16 1 ±. ± FS FS FS1.5 58FS1.5 58FS11.5 FS85 56FS15 58FS5 58FS5 58FS15 FS8 56FS1 58FS 58FS 58FS1 ArIon Laser / FSX FSX15 58FSX /1 FS11.5 FS15 FS /1 7FS11.5 7FS15 7FS /1 8FS11.5 8FS15 8FS1 Andover Corporation Order online: Call tollfree in the US:

19 STANDARD & HIGHTRANSMITTING BANDPASS FILTERS Min. Nom. Blocked High CWL FWHM T Thk. from UV Size, Shape & Part Number Trans. Line (nm) (nm) Type (%) n* (mm) to (nm) 1.5mm Ø 5mm Ø mm Ø Hb / 86FS FS15 86FS1 Hbeta / FSX FSX15 86FSX1 ArIon Laser ArIon Laser ArIon Laser / / / 1 ±. ± FS1.5 88FS1.5 88FS FS5 88FS5 88FS15 88FS 88FS 88FS1 ArIon Laser / FSX FSX15 88FSX /1 9FS11.5 9FS15 9FS1. + /1 FS11.5 FS15 FS1. + / FSX11.5 FSX15 FSX1. ± ± FS1.5 FS5 FS. ± ± 75 8 FSX1.5 FSX5 FSX. + 1/ ± 8 FS1.5 FS5 FS. + 1/ ± FSX1.5 FSX5 FSX Cd. + / / /1 8 ± FS81.5 8FS FS11.5 FS85 8FS15 51FS15 FS8 8FS1 51FS1 ArIon Laser ArIon Laser ArIon Laser / / / 1 ±. ± FS FS FS FS5 515FS5 515FS15 515FS 515FS 515FS1 ArIon Laser / FSX FSX15 515FSX / /. + /1 5FS11.5 5FS11.5 FS11.5 5FS15 5FS15 FS15 5FS1 5FS1 FS1 NdYAG Laser NdYAG Laser NdYAG Laser 5. +./ / 5. + / 1 ±. ± FS1.5 5FS1.5 5FS11.5 5FS5 5FS5 5FS15 5FS 5FS 5FS1 NdYAG Laser 5. + / FSX11.5 5FSX15 5FSX1 Ti. + / 5. + / / FS11.5 5FS11.5 5FS11.5 FS15 5FS15 5FS15 FS1 5FS1 5FS1 Hg Zn / / 5 ± 1 56FS FS FS55 56FS15 56FS5 56FS1 Zn / FSX FSX15 56FSX /1 5FS11.5 5FS15 5FS / FS11.5 5FS15 5FS1 5. ± ± 5FS1.5 5FS5 5FS 5. ± ± FSX1.5 5FSX5 5FSX / ± 8 5FS1.5 5FS5 5FS / ± FSX1.5 5FSX5 5FSX Hg 5. + / / / / 8 ± 16 5 ± 1 7 5FS81.5 5FS FS FS51.5 5FS85 5FS15 57FS15 577FS55 5FS8 5FS1 57FS1 577FS5 MDM= MetalDielectricMetal Questions? techstaff@andovercorp.com Standard & HighTransmitting Bandpass Filters 17

20 STANDARD & HIGHTRANSMITTING BANDPASS FILTERS Min. Nom. Blocked High CWL FWHM T Thk. from UV Size, Shape & Part Number Trans. Line (nm) (nm) Type (%) n* (mm) to (nm) 1.5mm Ø 5mm Ø mm Ø Hg / 577FS FS15 577FS1 Hg / FS FS15 577FS /1 58FS FS15 58FS1 Na / 589FS FS15 589FS1 Na / FSX FSX15 589FSX /1. + /1 59FS11.5 FS FS15 FS15 59FS1 FS1. + /1 8 1 FSX11.5 FSX15 FSX1. ± ± FS1.5 FS5 FS. ± ± 8 1 FSX1.5 FSX5 FSX. + 1/ ± 8 FS1.5 FS5 FS. + 1/ ± FSX1.5 FSX5 FSX. + / / /1. + /1 8 ± FS FS11.5 6FS11.5 FS11.5 FS85 61FS15 6FS15 FS15 FS8 61FS1 6FS1 FS1 HeNe Laser HeNe Laser HeNe Laser / / / 1 ±. ± FS1.5 6FS1.5 6FS11.5 6FS5 6FS5 6FS15 6FS 6FS 6FS1 HeNe Laser / 8 1 6FSX11.5 6FSX15 6FSX1 Zn / 66FS FS15 66FS1 Zn / FSX FSX15 66FSX1 Kr Laser Kr Laser Kr Laser 6. + / / / / 1 ±. ± FS FS1.5 67FS1.5 67FS11.5 6FS15 67FS5 67FS5 67FS15 6FS1 67FS 67FS 67FS1 Kr Laser / FSX FSX15 67FSX /1 6FS11.5 6FS15 6FS / FSX11.5 6FSX15 6FSX1 6. ± ± 6FS1.5 6FS5 6FS 6. ± ± 8 1 6FSX1.5 6FSX5 6FSX / ± 8 6FS1.5 6FS5 6FS / ± FSX1.5 6FSX5 6FSX Ha Ha Ha 6. + / / / / 8 ± 16 1 ±. ± FS FS FS FS11.5 6FS85 656FS5 656FS5 656FS15 6FS8 656FS 656FS 656FS1 Ha / FSX FSX15 656FSX /1 6FS11.5 6FS15 6FS / FSX11.5 6FSX15 6FSX1 Li / / 67FS FS FS15 671FS1 67FS1 671FS1 Li / FSX FSX1 671FSX1 18 MDM= MetalDielectricMetal Andover Corporation Order online: Call tollfree in the US:

21 STANDARD & HIGHTRANSMITTING BANDPASS FILTERS Min. Nom. Blocked High CWL FWHM T Thk. from UV Size, Shape & Part Number Trans. Line (nm) (nm) Type (%) n* (mm) to (nm) 1.5mm Ø 5mm Ø mm Ø Laser Diode / 675FS FS15 675FS ± ± 675FS FS5 675FS /1 68FS FS15 68FS /1 69FS FS15 69FS1 Ruby Laser Ruby Laser Ruby Laser / / / 1 ±. ± FS1.5 69FS1.5 69FS FS5 69FS5 69FS15 69FS 69FS 69FS1 Ruby Laser / FSX FSX15 69FSX /1 7FS11.5 7FS15 7FS / FSX11.5 7FSX15 7FSX 7. ± ± 7FS1.5 7FS5 7FS 7. ± ± 8 1 7FSX1.5 7FSX5 7FSX / ± 8 7FS1.5 7FS5 7FS / ± FSX1.5 7FSX5 7FSX 7. + / / /1 8 ± FS FS11.5 7FS11.5 7FS85 71FS15 7FS15 7FS8 71FS1 7FS / / /1 7FS11.5 7FS11.5 7FS11.5 7FS15 7FS15 7FS15 7FS1 7FS1 7FS / FSX11.5 7FSX15 7FSX1 7. ± ± 7FS1.5 7FS5 7FS 7. ± ± 8 1 7FSX1.5 7FSX5 7FSX / ± 8 7FS1.5 7FS5 7FS / ± FSX1.5 7FSX5 7FSX K 7. + / / / 1 ± FS1.5 7FS FS11.5 7FS5 7FS15 766FS15 7FS 7FS1 766FS1 K / FSX FSX15 766FSX1 Rb / /1 77FS FS FS15 78FS15 77FS1 78FS1 Rb / FSX FSX15 78FSX1 Laser Diode Rb 78. ± / / ± 78FS1.5 79FS FS FS5 79FS15 795FS15 78FS 79FS1 795FS1 Rb / FSX FSX15 795FSX /1 8FS11.5 8FS15 8FS /1 1 8FSX11.5 8FSX15 8FSX1 8. ± ± 8FS1.5 8FS5 8FS 8. ± ± 8 1 8FSX1.5 8FSX5 8FSX / ± 8 8FS1.5 8FS5 8FS / ± FSX1.5 8FSX5 8FSX 8. + /1 1 ± FS1.5 8FS5 8FS Questions? techstaff@andovercorp.com MDM= MetalDielectricMetal Standard & HighTransmitting Bandpass Filters 19

22 STANDARD & HIGHTRANSMITTING BANDPASS FILTERS Min. Nom. Blocked High CWL FWHM T Thk. from UV Size, Shape & Part Number Trans. Line (nm) (nm) Type (%) n* (mm) to (nm) 1.5mm Ø 5mm Ø mm Ø Laser Diode /1 81FS FS15 81FS1 Laser Diode / FSX FSX15 81FSX1 Laser Diode 81. ± ± 81FS1.5 81FS5 81FS Laser Diode 81. ± ± FSX1.5 81FSX5 81FSX GaAlAs Laser 8. + / /1 FIN 8FS11.5 8FS11.5 8FS15 8FS15 8FS1 8FS1 GaAlAs Laser 8. + / FSX11.5 8FSX15 8FSX1 Laser Diode 8. ± ± 8FS1.5 8FS5 8FS Laser Diode 8. ± ± 8 1 8FSX1.5 8FSX5 8FSX 8. + / /1 8FS11.5 8FS11.5 8FS15 8FS15 8FS1 8FS / FSX11.5 8FSX15 8FSX1 8. ± ± 8FS1.5 8FS5 8FS 8. ± ± 8 1 8FSX1.5 8FSX5 8FSX / ± 8 8FS1.5 8FS5 8FS / ± FSX1.5 8FSX5 8FSX 8. + / / /1 1 ± FS1.5 8FS FS11.5 8FS5 8FS15 87FS15 8FS 8FS1 87FS / / /1 88FS FS11.5 9FS FS15 89FS15 9FS15 88FS1 89FS1 9FS / FSX11.5 9FSX15 9FSX1 9. ± ± 9FS1.5 9FS5 9FS 9. ± ± 8 1 9FSX1.5 9FSX5 9FSX / ± 8 9FS1.5 9FS5 9FS / ± FSX1.5 9FSX5 9FSX GaAs GaAs GaAs 9. + / / / / 1 ± 1 ±. ±.5 1 ± FS1.5 95FS1.5 95FS1.5 95FS11.5 9FS5 95FS5 95FS5 95FS15 9FS 95FS 95FS 95FS / 1 ± FSX FSX15 95FSX / / /1 91FS11.5 9FS11.5 9FS FS15 9FS15 9FS15 91FS1 9FS1 9FS / /1 9FS11.5 9FS11.5 9FS15 9FS15 9FS1 9FS / FSX11.5 9FSX15 9FSX1 9. ± ± 9FS1.5 9FS5 9FS 9. ± ± 1 9FSX1.5 9FSX5 9FSX / ± 8 9FS1.5 9FS5 9FS / ± FSX1.5 9FSX5 9FSX 9. + /1 1 ± 9 9FS1.5 9FS5 9FS MDM= MetalDielectricMetal Andover Corporation Order online: Call tollfree in the US:

23 STANDARD & HIGHTRANSMITTING BANDPASS FILTERS Min. Nom. Blocked High CWL FWHM T Thk. from UV Size, Shape & Part Number Trans. Line (nm) (nm) Type (%) n* (mm) to (nm) 1.5mm Ø 5mm Ø mm Ø 9. + / /1 9FS FS11.5 9FS15 97FS1 9FS1 97FS / / /1 5 98FS FS11.5 1FS FS15 99FS15 1FS15 98FS1 99FS1 1FS / FSX11.5 1FSX15 1FSX1 Hg 1. ± ± 5 1FS1.5 1FS5 1FS Hg 1. ± ± 8 1 1FSX1.5 1FSX5 1FSX / ± 8 5 1FS1.5 1FS5 1FS / ± FSX1.5 1FSX5 1FSX Hg 1. + / / / 1 ± FS1.5 1FS11.5 6FS11.5 1FS5 1FS15 6FS15 1FS 1FS1 6FS / FS11.5 6FS15 6FS1 Nd Laser NdYAG Laser 1. + / / / 1 ±. ± FS11.5 6FS1.5 6FS1.5 FS15 6FS5 6FS5 FS1 6FS 6FS NdYAG Laser / / FS FS11.5 6FS15 11FS15 6FS1 11FS / / / FS11.5 1FS FS FS15 1FS15 15FS15 115FS1 1FS1 15FS /1 1. ± 1. + /1 ± FS11.5 1FS1.5 15FS11.5 1FS15 1FS5 15FS15 1FS1 1FS 15FS / / / FS FS11.5 1FS11.5 1FS15 15FS15 1FS15 1FS1 15FS1 1FS / FSX11.5 1FSX15 1FSX1 1. ± ± FS1.5 1FS5 1FS 1. ± ± FSX1.5 1FSX5 1FSX / FS11.5 1FS15 1FS / FSX11.5 1FSX15 1FSX1 15. ± ± FS1.5 1FS5 1FS 15. ± ± FSX1.5 1FSX5 1FSX Methane / FS FS15 167FS ± ± FS FS5 167FS MDM= MetalDielectricMetal Questions? techstaff@andovercorp.com Standard & HighTransmitting Bandpass Filters 1

24 HardCoated Narrowband Filters Hard, durable, firstsurface coatings Suitable for hightemperature applications HardCoated Narrowband Filters Our firstsurface, hardcoat narrowband filters employ plasmadeposited, hardoxide coatings on Borosilicate Glass and do not utilize any absorbing filter glasses, making them suitable for high temperature applications. They provide a steep transition from a high, peak transmission to OD blocking. Available at wavelengths from nm to 15nm, including all major laser lines and atomic emission lines. All filters are mounted in black anodized aluminum rings to provide protection and easy identification. Please contact our technical sales department for pricing and deliverly. General Specifications Thickness: Size Tolerance: Minimum Clear Aperture: Substrate Material: Flatness: Surface Quality: Humidity and Abrasion: Durability: Operating Temperature: Mechanical: 5. ±.1mm +.mm /.1mm 1mm dia. Borosilicate Glass 5 waves per MILC897A Per MILC675A Per MILC897A C to + C Mounted in black anodized aluminum Applications Machine Vision Biotech Instrumentation Medical Devices % Transmission 6nm Narrowband 6HC15 6nm Narrowband 6HC Wavelength (nm) Wavelength (nm) % Transmission Andover Corporation Order online: Call tollfree in the US:

25 HARD COATED NARROWBAND FILTERS CWL FWHM Min Trans OD (avg.) Part Number (nm) (nm) (%) 5mm Ø 1 9 1nm HC nm 7HC nm HC nm 65HC nm 75HC nm 9HC nm HC nm 5HC nm HC nm HC nm 6HC nm HC nm HC nm HC nm 58HC nm HC nm 7HC nm 8HC nm 86HC nm 88HC nm 9HC nm HC nm 8HC nm 51HC nm 515HC nm 5HC nm 5HC nm HC nm 5HC nm 56HC nm 5HC nm 5HC nm 568HC nm 58HC nm 589HC nm 59HC nm HC nm 61HC nm 6HC nm 6HC nm 66HC nm 6HC15 CWL FWHM Min Trans OD (avg.) Part Number (nm) (nm) (%) 5mm Ø nm 1nm 67HC15 6HC nm 656HC nm 6HC nm 671HC nm 676HC nm 68HC nm 685HC nm 69HC nm 7HC nm 7HC nm 7HC nm 766HC nm 77HC nm 78HC nm 785HC nm 8HC nm 81HC nm 8HC nm 8HC nm 85HC nm 88HC nm 95HC nm 9HC nm 9HC nm 98HC nm 16HC nm 15HC15 Questions? techstaff@andovercorp.com Hard Coated Narrowband Filters

26 HardCoated Broadband Filters Hard, durable, firstsurface coatings Suitable for hightemperature applications Available from stock HardCoated Broadband Filters Our firstsurface, hard coat broadband filters employ magnetron sputtered, hardoxide coatings deposited on Borosilicate Glass and do not utilize any absorbing filter glasses, making them suitable for high temperature applications. They provide a steep transition from a high, peak transmission to OD blocking. Available at standard Raman wavelengths: 88, 51, 5, 6, 785nm. We offer three standard sizes, with custom sizes available on request. Applications General Specifications Machine Vision Biotech Instrumentation Medical Devices Thickness:. ±.5mm Size Tolerance: +.mm /.mm Minimum Clear Aperture: 85% of outside dimension Substrate Material: Borosilicate Glass (5nm filter utlizes Fused Silica) Flatness: 5 waves Surface Quality: per MILC897A Humidity and Abrasion: Per MILC675A Durability: Per MILC897A Operating Temperature: C to + C Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes Andover Corporation Order online: Call tollfree in the US:

27 % Transmission 88nm Bandpass 88HC8XX Wavelength (nm) % Transmission 5nm Bandpass 5HC1XX nm Bandpass 785HC1XX Wavelength (nm) Wavelength (nm) % Transmission 7 1 HARDCOATED BANDPASS FILTERS CWL FWHM Transmission OD (avg.) Size, Shape & Part Number Line (nm) (nm) (%) 1.5mm Ø 5mm Ø mm Ø Argon Laser Argon Laser NaYAG ± 8. 1 ± ± nm 7nm 7nm 5HC81.5 HC11.5 7HC11.5 5HC85 HC15 7HC15 5HC8 HC1 7HC1 Argon Laser Argon Laser NaYAG ± 8. 9 ± 9. 1 ± nm 8nm 9nm 88HC HC91.5 5HC HC85 515HC95 5HC15 88HC8 515HC9 5HC1 LED HeNe Laser Ti:Sapphire ±. 9 ± ± nm 9nm 11nm 5HC1.5 6HC HC HC5 6HC95 785HC175 5HC 6HC9 785HC17 Questions? techstaff@andovercorp.com Hard Coated Broadband Filters 5

28 SemiCustom Bandpass Filters Wavelengths from the visible through infrared Bandwidths from.15nm to 8nm Short lead times SemiCustom Bandpass Filters Thanks to a large inventory of components, Andover Corporation can fabricate and deliver higherperformance commercial quality bandpass filters to your specifications in as soon as 51 days from receipt of order. To specify your semicustom filter, follow the steps in the table header below. 6 General Specifications All other features are predetermined by these three choices. The outofband blocking of these filters is 1 x 1 within the defined spectral range. Optional Reference page 1 threaded rings are available, and image quality versions are also available. Please contact our technical sales department for pricing and delivery. SEMICUSTOM BANDPASS FILTERS STEP 1 STEP STEP Select Bandwidth, Filter Type and CW/L Select Blocking Range Select Size and Corresponding Part Number Bandwidth Cavities/ CW/L CW/L Min. T (%) (FWHM) Filter Range Tolerance When Blocked To Size, Shape & Part Number (nm) Type (nm) (nm) 1µ n* 1.5mm Ø 5mm Ø mm Ø.15 ±.5 1/1 1/ / +.1/ 5 1FC11.5 1FC11.5 1FC15 1FC15 1FC1 1FC1. ±.5 1/1 1/ / +.1/ / FC11.5 FC11.5 FC15 FC15 FC1 FC1. ± / +.1/ FC11.5 FC11.5 FC15 FC15 FC1 FC1.. / / 5 FC11.5 FC15 FC1. ± / +.1/ 5 5 / 5FC11.5 5FC11.5 5FC15 5FC15 5FC1 5FC1. ± ±.1 ±.1 ± FC81.5 6FC11.5 6FC11.5 6FC85 6FC15 6FC15 6FC8 6FC1 6FC1..8 / / / ±.1 ±.1 ± FC11.5 7FC11.5 7FC11.5 7FC15 7FC15 7FC15 7FC1 7FC1 7FC1.8 ± / +./ +./ +./ +./ FC81.5 8FC11.5 8FC11.5 8FC11.5 8FC FC85 8FC15 8FC15 8FC15 8FC165 8FC8 8FC1 8FC1 8FC1 8FC16 Andover Corporation Order online: Call tollfree in the US:

29 SEMICUSTOM BANDPASS FILTERS STEP 1 STEP STEP Select Bandwidth, Filter Type and CW/L Select Blocking Range Select Size and Corresponding Part Number Bandwidth (FWHM) Cavities/ Filter CW/L Range CW/L Tolerance Min. T (%) When Blocked To Size, Shape & Part Number (nm) Type (nm) (nm) 1µ n* 1.5mm Ø 5mm Ø mm Ø 1. ± / +./ +./ +./ +./ +./ +./ +./ / 1FC1.5 1FC51.5 1FC61.5 1FC81.5 1FC11.5 1FC11.5 1FC11.5 1FC FC5 1FC55 1FC65 1FC85 1FC15 1FC15 1FC15 1FC165 1FC 1FC5 1FC6 1FC8 1FC1 1FC1 1FC1 1FC16 1. ±. / / / / / +./ +./ +./ 5 5 / 1FC51.5 1FC61.5 1FC71.5 1FC81.5 1FC55 1FC65 1FC75 1FC85 1FC5 1FC6 1FC7 1FC8 1.5 ± / +./ +./ +./ +./ +./ +./ +./ / 15FC1.5 15FC1.5 15FC FC FC FC FC FC FC5 15FC5 15FC65 15FC85 15FC15 15FC15 15FC15 15FC165 15FC 15FC 15FC6 15FC8 15FC1 15FC1 15FC1 15FC16. ± / +.5/ +./ +./ +./ +./ +./ +./ / FC1.5 FC1.5 FC61.5 FC81.5 FC11.5 FC11.5 FC11.5 FC161.5 FC5 FC5 FC65 FC85 FC15 FC15 FC15 FC165 FC FC FC6 FC8 FC1 FC1 FC1 FC16. ±.5 / / / / /. ± / +./ +./ +./ +./ +.5/ +.5/ +.5/ +.5/ +.5/ +.5/ +.5/ +.5/ / / FC1.5 FC51.5 FC61.5 FC71.5 FC81.5 FC1.5 FC1.5 FC61.5 FC81.5 FC11.5 FC11.5 FC11.5 FC161.5 FC5 FC55 FC65 FC75 FC85 FC5 FC5 FC65 FC85 FC15 FC15 FC15 FC165 FC FC5 FC6 FC7 FC8 FC FC FC6 FC8 FC1 FC1 FC1 FC16 Questions? techstaff@andovercorp.com SemiCustom Bandpass Filters 7

30 8 SEMICUSTOM BANDPASS FILTERS STEP 1 STEP STEP Select Bandwidth, Filter Type and CW/L Select Blocking Range Select Size and Corresponding Part Number Bandwidth (FWHM) Cavities/ Filter CW/L Range CW/L Tolerance Min. T (%) When Blocked To Size, Shape & Part Number (nm) Type (nm) (nm) 1µ n* 1.5mm Ø 5mm Ø mm Ø. ±.5 / / / / / / +.5/ +.5/ +.5/ +.5/ / FC1.5 FC51.5 FC61.5 FC71.5 FC81.5 FC5 FC55 FC65 FC75 FC85 FC FC5 FC6 FC7 FC8 5. ± / + 1/ + 1/ + 1/ + 1/ + 1/ + 1/ + 1/ + 1/ + 1/ 5 a 65 b c d e / FC1.5 FC1.5 FC61.5 FC11.5 FC11.5 FC11.5 FC161.5 FC181.5 FC191.5 FC1.5 FC5 FC5 FC65 FC15 FC15 FC15 FC165 FC185 FC195 FC5 FC FC FC6 FC1 FC1 FC1 FC16 FC18 FC19 FC 5. ± 1. / / / / / / / / + 1/ + 1/ + 1/ + 1/ + 1/ + 1/ 5 a b c / FC1.5 FC1.5 FC51.5 FC61.5 FC71.5 FC81.5 FC91.5 FC5 FC5 FC55 FC65 FC75 FC85 FC95 FC FC FC5 FC6 FC7 FC8 FC9 5. ± 1. / / / / / + 1/ + 1/ + 1/ a b 5 / FC51.5 FC61.5 FC71.5 FC81.5 FC55 FC65 FC75 FC85 FC5 FC6 FC7 FC8 1. ±. MDM/7 MDM/7 / / / / / / / / / + / + / + / + / + / + / + / + / + / + / + / a 7 b 7 c 7 d e / 1FC1.5 1FC1.5 1FC1.5 1FC1.5 1FC1.5 1FC51.5 1FC61.5 1FC71.5 1FC81.5 1FC91.5 1FC1.5 1FC11.5 1FC5 1FC5 1FC5 1FC5 1FC5 1FC55 1FC65 1FC75 1FC85 1FC95 1FC5 1FC15 1FC 1FC 1FC 1FC 1FC 1FC5 1FC6 1FC7 1FC8 1FC9 1FC 1FC1 a= Blocking to 1nm b= Blocking to 1nm c= Blocking to 15nm d= Blocking to nm e= Blocking to nm Andover Corporation Order online: Call tollfree in the US:

31 SEMICUSTOM BANDPASS FILTERS STEP 1 STEP STEP Select Bandwidth, Filter Type and CW/L Select Blocking Range Select Size and Corresponding Part Number Bandwidth Cavities/ CW/L CW/L Min. T (%) Size, Shape & Part Number (FWHM) Filter Range Tolerance When Blocked To (nm) Type (nm) (nm) 1µ n* 1.5mm Ø 5mm Ø mm Ø 1. ±. / / / / / / + / + / + / + / 7 a 7 b 7 c / 1FC51.5 1FC61.5 1FC71.5 1FC81.5 1FC91.5 1FC55 1FC65 1FC75 1FC85 1FC95 1FC5 1FC6 1FC7 1FC8 1FC9. ±. MDM/8 MDM/8 5/ ±.5 ±.5 ±.5 _ 1 15 FC1.5 FC1.5 FC1.5 FC5 FC5 FC5 FC FC FC. ±. / / / / / / / / ±. ±. ±. ±. ±. ±. ±. ± a 7 b 7 c 7 d e 5 / FC1.5 FC51.5 FC61.5 FC71.5 FC81.5 FC91.5 FC1.5 FC11.5 FC5 FC55 FC65 FC75 FC85 FC95 FC5 FC15 FC FC5 FC6 FC7 FC8 FC9 FC FC1. ±. / / / / ±. ±. ±. ± a 7 b 5 / FC51.5 FC61.5 FC71.5 FC81.5 FC55 FC65 FC75 FC85 FC5 FC6 FC7 FC8. ± 1. MDM/8 MDM/8 5/ ± 5. ± 5. ± 5. _ 15 FC1.5 FC1.5 FC51.5 FC5 FC5 FC55 FC FC FC5. ± 1. 5/5 5/5 / / / / / / ± 5. ± 5. ± 5. ± 5. ± 5. ± 5. ± 5. ± a 75 b 7 c 7 d 7 e _ FC51.5 FC51.5 FC61.5 FC71.5 FC81.5 FC91.5 FC1.5 FC11.5 FC55 FC55 FC65 FC75 FC85 FC95 FC5 FC15 FC5 FC5 FC6 FC7 FC8 FC9 FC FC1. ± 1. 5/5.99. ± 6. _ FC51.5 FC55 FC5 8. ±. 5/5 / / / / / ± 1. ± 1. ± 1. ± 1. ± 1. ± a 7 b 7 c 7 d 7 e 8FC1.5 8FC71.5 8FC81.5 8FC91.5 8FC1.5 8FC FC5 8FC75 8FC85 8FC95 8FC5 8FC515 8FC 8FC7 8FC8 8FC9 8FC 8FC51 a= Blocking to 1nm b= Blocking to 1nm c= Blocking to 15nm d= Blocking to nm e= Blocking to nm 9 Questions? techstaff@andovercorp.com SemiCustom Bandpass Filters

32 Astronomy UBVRI Filters Options for professionals and amateurs alike Ideal for photometric calibration Astronomy UBVRI Filters Andover Corporation offers two sets of UBVRI filters the Johnson/Bessel and the Kron/Cousins types as standard items. These wideband filters isolate and measure large specific bands of light emitted by astronomical objects. Both types have the same ultraviolet, blue and visible filters but different red and infrared filters. The Johnson/Bessel type is better suited for use with a photomultiplier tube, while the Kron/Cousins type is better suited for use with a Silicon CCD. Custom UBVRI filters are available in your choice of size and spectral characteristics. Please contact our technical sales department for a quotation. General Specifications Size Tolerance: Glass Thickness: Bevels: Coating Durability: Construction: OPTICAL SPECIFICATIONS Transmitted Wavefront: Parallelism: Surface Quality: Optical Quality: AR Coatings: +/.5mm 5.mm +/.1mm Break all sharp edges Per MILC897A moderate abrasion Schott glass substrates (ground and polished) laminated with indexmatching epoxy 1/ wave or better per 5mm arc seconds or better / or better per MILC675 Image Quality Exterior surfaces (appropriate to the filter passband) JOHNSON / BESSEL FILTER SPECIFICATIONS U B V R I I Nominal CW/L: 65nm nm 5nm nm 9nm Nominal FWHM: nm 1nm 9nm 1nm nm Nominal Transmission: > % > % > 7% > 7% > 7% KRON / COUSINS FILTER SPECIFICATIONS U B V R I Nominal CW/L: 65nm nm 5nm 7nm 8nm Nominal FWHM: nm 1nm 9nm nm 1nm Nominal Transmission: > % > % > 7% > 7% > 7% Andover Corporation Order online: Call tollfree in the US:

33 JOHNSON/BESSEL UBVRI FILTERS Type Ultraviolet Blue Visible Red Infrared Size, Shape & Part Number & Type 5mm Ø mm Ø mm SQ JOHNU5 JOHNB5 JOHNV5 JOHNR5 JOHNI5 JOHNU JOHNB JOHNV JOHNR JOHNI JOHNUS JOHNBS JOHNVS JOHNRS JOHNIS (Mounted) 1mm Ø JOHNU1M JOHNB1M JOHNV1M JOHNR1M JOHNI1M (Mounted) mm Ø JOHNUM JOHNBM JOHNVM JOHNRM JOHNIM 5 Piece Sets JOHNFA5 JOHNFA JOHNFAS JOHNFA1M JOHNFAM 1 V I % Transmittance 8 U B R Wavelength (nm) KRON/COUSINS UBVRI FILTERS Size, Shape & Part Number & Type (Mounted) Type 5mm Ø mm Ø mm SQ 1mm Ø Ultraviolet Blue Visible Red Infrared KRONU5 KRONB5 KRONV5 KRONR5 KRONI5 KRONU KRONB KRONV KRONR KRONI KRONUS KRONBS KRONVS KRONRS KRONIS KRONU1M KRONB1M KRONV1M KRONR1M KRONI1M (Mounted) mm Ø KRONUM KRONBM KRONVM KRONRM KRONIM 5 Piece Sets KRONFA5 KRONFA KRONFAS KRONFA1M KRONFAM 1 V R I % Transmittance 8 U B Wavelength (nm) Questions? techstaff@andovercorp.com Astronomy UBVRI Filters 1

34 Metallic Neutral Density Filters General METALLIC NEUTRAL DENSITY SPECIFICATIONS Optical Nominal Transmission Deviation From Nominal (%) Density Transmission (%) nm 8nm 8nm Provides attenuation with greater linearity over a wide spectral range Reduces thermal effects in lowpower laser applications Soda lime glass, fused silica and custom substrates available Delivers superior durability Infrared NDs also available see pg. 5 for details ± 9. ± 8. ± 6. ± 5. ±. ±. ±. ±. ±. ±.5 ±.5 ±. ± 1.5 ±.5 ±.15 ±.6 ±.8 Metallic ND Coated Metalliccoated neutral density (ND) filters obtain their optical density from a metal alloy coating on a substrate approopriate for the wavelength region of interest. Unlike the alldielectric or absorption type, the metallic type ND filter employs a combination of absorption and reflection to reduce the intensity of light. While able to withstand more incident power than the absorptive type, metallic ND filters are suitable only for lowenergy pulsed applications. (Note: If used in series, these filters should be tilted to avoid multiple reflections and any reduction of density). ±. ±. ±. ±. ± 1.5 ± 1.5 ± 1.5 ± 1.5 ± 1.5 ± 1. ± 1. ± 1. ±.5 ±. ±.7 ±.5 +.1/.8 Applications Thickness: 1.5 ±.5mm Calibration Dimensional Tolerances: +/.mm Attenuation Clear Aperture: 9% of outside dimension LowPower Lasers Surface Quality: 8/ per MIL18B Scientific Measurements and Research Coating Adherence: Per MILM18C Machine Vision and Other Imaging Applications Humidity: Per MILSTD81F Max. Operating Temperature: +1 C Substrate Materials: Glass ( nm region) or fused silica ( nm region) Optical Quality: Glass: Flatness of 5 waves per inch and parallelism of arc minutes or better. Fused Silica: Flatness of λ/ per inch and parallelism of arc seconds or better. Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes ± 9. ± 8. ± 6. ± 5. ±. ±. ±. ±. ±. ±.5 ±.5 ±. ± 1.5 ±.5 ±.15 ±.1 (nominal) ±.1 (nominal) Andover Corporation Order online: Call tollfree in the US:

35 % Transmittance VISIBLE/NEAR INFRARED REGION (Glass Substrate, nm) Optical Nominal Size, Shape & Part Number Density Transmission (%) 1.5mm Ø 5mm Ø mm Ø mm SQ For sets see pg 5; Infrared NDs also available see pg 5 for details ULTRAVIOLET/VISIBLE/NEAR INFRARED REGION (Fused Silica, nm) Optical Nominal Size, Shape & Part Number Density Transmission (%) 1.5mm Ø 5mm Ø mm Ø mm SQ TYPICAL 1. ND FILTER ON FUSED SILICA Wavelength (nm) 1FN FN51.5 FN51.5 FN51.5 FN51.5 FN51.5 FN51.5 7FN51.5 8FN51.5 9FN51.5 1FN51.5 1FN51.5 1FN51.5 FN51.5 FN51.5 FN51.5 FN51.5 1FN FN61.5 FN61.5 FN61.5 FN61.5 FN61.5 FN61.5 7FN61.5 8FN61.5 9FN61.5 1FN61.5 1FN61.5 1FN61.5 FN61.5 FN61.5 FN61.5 FN61.5 1FN55 15FN55 FN55 FN55 FN55 FN55 FN55 7FN55 8FN55 9FN55 1FN55 1FN55 1FN55 FN55 FN55 FN55 FN55 1FN65 15FN65 FN65 FN65 FN65 FN65 FN65 7FN65 8FN65 9FN65 1FN65 1FN65 1FN65 FN65 FN65 FN65 FN65 1FN5 15FN5 FN5 FN5 FN5 FN5 FN5 7FN5 8FN5 9FN5 1FN5 1FN5 1FN5 FN5 FN5 FN5 FN5 1FN6 15FN6 FN6 FN6 FN6 FN6 FN6 7FN6 8FN6 9FN6 1FN6 1FN6 1FN6 FN6 FN6 FN6 FN6 1FN5S 15FN5S FN5S FN5S FN5S FN5S FN5S 7FN5S 8FN5S 9FN5S 1FN5S 1FN5S 1FN5S FN5S FN5S FN5S FN5S 1FN6S 15FN6S FN6S FN6S FN6S FN6S FN6S 7FN6S 8FN6S 9FN6S 1FN6S 1FN6S 1FN6S FN6S FN6S FN6S FN6S Questions? techstaff@andovercorp.com Metallic Neutral Density Filters

36 Absorptive Neutral Density Filters Sets provide a uniform series of filters for adjusting illumination Custom substrate materials and dimensions available Absorptive ND Filters With their ability to minimize backreflections and scattered light, absorptive neutral density (ND) filters are ideal for calibration. In contrast to the metallic type, absorptiontype filters achieve their optical density by absorbing light within the substrate. For this reason, thickness is a key determinant of opacity. Given their absorbing quality, these filters are suitable for lowpower applications only. Infrared NDs also available see pg 5 for details General Specifications Thickness: 5.mm (maximum) Dimensional Tolerance: +./.5mm Clear Aperture: 9% of outside dimension Surface Quality: 8/ per MIL18B Max. Operating Temperature: +1 C Substrate Material: Schott absorption glass Spectral Range: 7nm Optical Quality: Flatness of λ/ per inch and parallelism of arc seconds or better Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Photomicrography Machine Vision Calibration Photography Scientific Measurements and Research Optical Nominal Density Tolerance Size, Shape & Part Number Density Transmission 5nm (%) Thickness (mm) 5mm Ø mm SQ ±. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. ± 1. Andover Corporation Order online: Call tollfree in the US: ABND5 ABND5 ABND5 ABND5 ABND5 ABND5 7ABND5 8ABND5 9ABND5 1ABND5 1ABND5 ABND5 ABND5 ABND5 1ABNDS ABNDS ABNDS ABNDS ABNDS ABNDS 7ABNDS 8ABNDS 9ABNDS 1ABNDS 1ABNDS ABNDS ABNDS ABNDS

37 Neutral Density Sets Neutral Density Sets For your convenience, standard and userdefined neutral density filter sets are available and come with a quality hardwood case for secure storage. METALLICCOATED SETS Andover s metalliccoated neutral density filter sets feature both round and square filters in your choice of four sizes and two substrates. 7 Piece Set Size, Shape & Part Number Substrate 1.5mm Ø 5mm Ø mm Ø mm SQ Glass 18FA FA55 18FA5 18FA5S Fused Silica 1FA61.5 1FA65 1FA6 1FA6S Includes seven filters with optical densities ranging from.1 to., in your choice of four set sizes, and in either glass or fused silica substrates. 17 Piece Set Size, Shape & Part Number Substrate 1.5mm Ø 5mm Ø mm Ø mm SQ Glass 1FA51.5 1FA55 1FA5 1FA5S Fused Silica 1FA61.5 1FA65 1FA6 1FA6S Includes seventeen filters with optical densities ranging from.1 to., in your choice of four set sizes, and in either glass or fused silica substrates. ABSORPTIVE SETS Andover s absorptive neutral density filter sets provide a choice of either round or square filters 7 Piece Set Size, Shape & Part Number 5mm Ø mm SQ 15FAND5 15FANDS Includes seven filters with optical densities ranging from.1 to.. Questions? techstaff@andovercorp.com 1 Piece Set Size, Shape & Part Number 5mm Ø mm SQ 16FAND5 16FANDS Includes fourteen filters with optical densities ranging from.1 to.. Absorptive Neutral Density Filters / Neutral Density Sets 5

38 Heat Control Filters Cold mirrors transmit near IR and reflect visible light Hot mirrors reflect nearir and transmit visible light Together, they effectively cool highpower illumination systems Heat Control Filters A combination of hot and cold mirrors can essentially eliminate 99% of the radiation generated by highpower illumination systems. The cold mirror, mounted at a 5 angle of incidence, transmits much of the heat while reflecting the visible light. The hot mirror, mounted perpendicular to the light beam, reflects the remaining heat while transmitting 9% of the visible light. General Specifications Thickness:.mm ±.5mm (6.mm ±.5mm for IR Suppressing) Size Tolerance: +.mm/.5mm Min. Clear Aperture: 95% of outside dimension Substrate Material: Borosilicate glass Flatness: 5 1 waves per 5mm Parallelism: arc minutes or better Surface Quality: 8/ per MILO18 Humidity and Abrasion: Per MILC675A Max. Operating Temperature: + C (+1 C for IR suppressing) Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Projection Systems Photocopiers Surgical and Dental Lighting Film and Photographic Apparatus Illumination Systems Scientific Instruments 6 Hot Mirrors Hot mirrors are heatreflecting filters designed to transmit visible wavelengths and reflect nearinfrared heatgenerating wavelengths. Andover s hot mirrors have hard, firstsurface dielectric coatings that meet or exceed the humidity and abrasion specifications listed above. The coatings are deposited onto a lowexpansion material such as borosilicate glass to prevent cracking or crazing from high heat applications. Size, Shape & Part Number 5mm Ø mm Ø mm SQ 775FW85 775FW8 775FW8S Wavelength (nm) Average Transmittance: 5nm 675nm 91% Minimum Transmittance: nm 675nm 75% Average Reflection: 7nm 11nm 95% Andover Corporation Order online: Call tollfree in the US: % Transmittance 1 8 ( Angle)

39 Ultraviolet Cold Mirrors Ultraviolet mirrors differ slightly from the standard cold mirror in that they reflect the ultraviolet and transmit the visible and infrared. They are excellent for applications that call for separating the ultraviolet from the visible and near infrared. Size, Shape & Part Number 5mm Ø mm Ø mm SQ 75FV865 75FV86 75FV86S Cold Mirrors Cold mirrors are heattransmitting filters designed to reflect visible wavelengths and transmit nearinfrared wavelengths. Andover s cold mirrors have firstsurface coatings that are deposited onto a lowexpansion material such as borosilicate glass. Size, Shape & Part Number 5mm Ø mm Ø mm SQ 65FK85 65FK8 65FK8S 8nm Cold Mirrors This version of the cold mirror is identical to the standard cold mirror, but with the reflection range extended to 8nm. It has excellent transmission throughout the NIR region. Size, Shape & Part Number 5mm Ø mm Ø mm SQ 8FK85 8FK8 8FK8S Infrared Suppressing Filters These filters extend the blocking of standard hot mirrors across the infrared range using a combination of reflection from the dielectric stack and absorption from an infrared absorbing filter glass. Because of this absorption factor, these filters are suitable only in lowpower applications with a maximum filter temperature of 1 C. Size, Shape & Part Number 5mm Ø mm Ø mm SQ 8FB75 8FB7 8FB7S % Transmittance % Transmittance % Transmittance % Transmittance (5 Angle) Wavelength (nm) Average Transmittance: nm 1nm 85% Average Reflection: 5nm 75nm 95% 1 8 (5 Angle) Wavelength (nm) Average Transmittance: 8nm 1nm 85% Average Reflection: nm 6nm 9% (5 Angle) Wavelength (nm) Average Transmittance: 88nm 17nm 85% Average Reflection: nm 8nm 95% ( Angle) Wavelength (nm) Average Transmittance: nm nm 65% Average Reflection: 7nm nm 1% Questions? techstaff@andovercorp.com Heat Control Filters 7

40 Dichroic Filters Useful for redirecting a particular band of light Spectrally stable at changing temperatures and humidity Available in custom designs, colors, angles of incidence, substrates, dimensions, and coatings Dichroic Filters Far more durable than dyed plastic or gelcoated types, dichroic glass filters have a hard dielectric film created by thin layers of metallic oxides. These color separation filters are designed to isolate certain regions of the visible spectrum, reflecting rather than absorbing unwanted frequencies. As a result, they not only produce pure, intense color but also withstand the heat and UV energy from highpower light sources. Commonly used as light balancing filters in color enlargers and photocopiers, dichroic filters are suitable for any application that requires separating the incident light into two or more light beams. General Specifications Thickness: 1.mm ±.5mm Size Tolerance: +.mm/.5mm Min. Clear Aperture: 95% of outside dimension Substrate Material: Soda lime glass Flatness: 5 waves per 5mm Parallelism: arc minutes or better Surface Quality: 8/ per MILC897A Humidity and Abrasion: Per MILC897A Max. Operating Temperature: + C Mechanical: Unmounted Optional:Mounted in threaded ring see pg 61 for thread sizes Applications Fluorescence Microscopy UVVIS Irradiation Camera Imaging Stage Lighting Architectural Lighting Projection Displays Color Enlargers Photocopiers Size, Shape & Part Number Type Color 5mm Ø mm Ø mm SQ Subtractive Cyan 59FD5 59FD 59FDS Magenta 5FD65 5FD6 5FD6S Yellow 5FD5 5FD 5FDS Additive Blue 5FD65 5FD6 5FD6S Green 5FD665 5FD66 5FD66S Red 585FD65 585FD6 585FD6S Reflective Blue 75FD685 75FD68 75FD68S Red 58FD75 58FD7 58FD7S 8 Andover Corporation Order online: Call tollfree in the US:

41 CYAN SUBTRACTIVE FILTER 1 ( Angle) BLUE ADDITIVE FILTER 1 ( Angle) % Transmittance 8 % Transmittance Wavelength (nm) T: 8% Average nm 5nm % Point 59nm (nominal) R: 99% Average 6nm 7nm Wavelength (nm) T: 75% Average 9nm 8nm % Point 5nm (nominal) R: 99% Average 5nm 7nm MAGENTA SUBTRACTIVE FILTER 1 ( Angle) GREEN ADDITIVE FILTER 1 ( Angle) % Transmittance 8 % Transmittance Wavelength (nm) T: 8% Average 8nm 75nm % Points 95nm & 5nm (nominal) R: 99% Average nm 565nm T: 8% Average 6nm 7nm Wavelength (nm) R: 99% Average 8nm nm % Points 5nm & 575nm (nominal) T: 85% Min at 5nm R: 99% Average nm 7nm YELLOW SUBTRACTIVE FILTER 1 ( Angle) RED ADDITIVE FILTER 1 ( Angle) % Transmittance 8 % Transmittance Wavelength (nm) R: 99% Average 1nm 75nm % Point 5nm (nominal) T: 85% Average 5nm 7nm Wavelength (nm) R: 99% Average 7nm 5nm % Point 585nm (nominal) T: 8% Average 61nm 7nm BLUE REFLECTIVE FILTER 1 (5 Angle) RED REFLECTIVE FILTER 1 (5 Angle) % Transmittance 8 % Transmittance Wavelength (nm) R: 9% Average 8nm nm % Point 75nm (nominal) T: 85% Average 55nm 8nm Questions? techstaff@andovercorp.com Wavelength (nm) T: 85% Average nm 5nm % Point 58nm (nominal) R: 9% Average 61nm 75nm Dichroic Filters 9

42 Standard Dichroic Filter Sets Excellent for color process work, Andover s select dichroic filter sets come in two configurations. Each set is accompanied by complete spectral curve data sheets and shipped in a protective storage case. COLOR SUBTRACTIVE Piece Set Size, Shape & Part Number 5mm Ø mm Ø mm SQ 16FA65 16FA6 16FA6S Includes Cyan, Magenta and Yellow filters in your choice of three sizes. Cyan T: 8% Average nm 5nm R: 99% Average 6nm 7nm % Point 59nm (nominal) Magenta T: 8% Average 8nm 75nm R: 99% Average nm 565nm T: 8% Average 6nm 7nm % Points 95nm & 5nm (nominal) Yellow R: 99% Average 1nm 75nm T: 85% Average 5nm 7nm % Cuton 5nm (nominal) % Transmittance Wavelength (nm) COLOR ADDITIVE Piece Set Size, Shape & Part Number 5mm Ø mm Ø mm SQ 16FA5 16FA 16FAS Includes Blue, Green and Red filters in your choice of three sizes. Blue T: 8% Average 9nm 8nm R: 99% Average 5nm 7nm % Point 5nm (nominal) Green R: 99% Average 8nm nm T: 85% Minimum at 5nm R: 99% Average nm 7nm % Points 5nm & 575nm (nominal) Red R: 1% Average 7nm 5nm T: 85% Average 61nm 7nm % Cuton 585nm (nominal) % Transmittance Wavelength (nm) Andover Corporation Order online: Call tollfree in the US:

43 USERDEFINED DICHROIC FILTER SETS Size, Shape & Number UserDefined Sets 5mm Ø mm Ø mm Sq. Ø Piece Set FS5 FS FSS 6Piece Set FS65 FS6 FS6S 8Piece Set FS85 FS8 FS8S Questions? Dichroic Filters 1

44 Edge Filters Provide sharp separation between transmission and reflection Provide steeper transition than color glass filters Offer coverage over the 1nm range Edge Filters Often referred to as long wave pass (LWP) and short wave pass (SWP) filters, edge filters provide a welldefined transition between reflecting and transmitting regions. Essentially a modified quarterwave stack, the filters use interference effects rather than absorption to isolate their spectral bands. Because edge filters will shift shorter with an increase in the angle of incidence, they are a good choice for finetuning the cuton/cutoff wavelength. With their durable, firstsurface dielectric coatings, Andover s edge filters are built to withstand the normal cleaning and handling required by any highquality optical component. General Specifications Thickness:.mm maximum Size Tolerance: +.mm/.5mm Min. Clear Aperture: 85% of outside dimension Substrate Material: Glass (Note: BK7 or Borofloat available as an option for higher Tx) Flatness: 5 waves per 5mm Surface Quality: 8/ per MILC897A Humidity and Abrasion: Per MILC675A Operating Temperature: C to + C Cuton/cutoff Slopes: 6% maximum (11% for nm filter) Cuton/cutoff Tolerance: ±1nm from nm 1nm ±5nm from nm 75nm Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Fluorescence Photometry Color Enhancement and Combining TRANSMISSION Long Wave Pass: Short Wave Pass: REJECTION Long Wave Pass: Short Wave Pass Effective Index of Refraction (n*) 85% average from the % cuton point to nm nm 85% average from the % cuton point to.75 x the % cutoff point 1nm 85% average from the % cuton point to.75 x the % cutoff point (Note: With the exception of the nm filter, all SWP filters will drop off in transmission at wavelengths under 5nm.) 99% or greater from.9 x the % point to the ultraviolet 99% or greater from 1.7 x the % point to 1.5 x the % point 1.7 (approximately) Andover Corporation Order online: Call tollfree in the US:

45 % Transmittance 1 8 LONG WAVE PASS To nm Transmission Range % Cuton Point.9 x % Cuton Point Rejection Range Wavelength (nm) VISIBLE % Size, Shape & Part Number Point 1.5mm Ø 5mm Ø mm Ø mm SQ nm FH91.5 FH95 FH9 FH9S 5nm 5FH91.5 5FH95 5FH9 5FH9S nm FH91.5 FH95 FH9 FH9S 75nm 75FH FH95 75FH9 75FH9S nm FH91.5 FH95 FH9 FH9S nm FH91.5 FH95 FH9 FH9S nm FH91.5 FH95 FH9 FH9S 5nm 5FH91.5 5FH95 5FH9 5FH9S nm FH91.5 FH95 FH9 FH9S 6nm 6FH91.5 6FH95 6FH9 6FH9S 7nm 7FH91.5 7FH95 7FH9 7FH9S NEAR INFRARED % Size, Shape & Part Number Point 1.5mm Ø 5mm Ø mm Ø mm SQ 7nm 7FH91.5 7FH95 7FH9 7FH9S 8nm 8FH91.5 8FH95 8FH9 8FH9S 8nm 8FH91.5 8FH95 8FH9 8FH9S 9nm 9FH91.5 9FH95 9FH9 9FH9S 9nm 9FH91.5 9FH95 9FH9 9FH9S 1nm 1FH91.5 1FH95 1FH9 1FH9S % Transmittance 1 8 Transmission Range SHORT WAVE PASS % Cutoff Point 1.7 x % 1.5 x % Cutoff Point Cutoff Point Rejection Range Wavelength (nm) VISIBLE % Size, Shape & Part Number Point 1.5mm Ø 5mm Ø mm Ø mm SQ nm FL71.5 FL75 FL7 FL7S nm FL71.5 FL75 FL7 FL7S nm FL71.5 FL75 FL7 FL7S 5nm 5FL71.5 5FL75 5FL7 5FL7S nm FL71.5 FL75 FL7 FL7S 6nm 6FL71.5 6FL75 6FL7 6FL7S 7nm 7FL71.5 7FL75 7FL7 7FL7S NEAR INFRARED % Size, Shape & Part Number Point 1.5mm Ø 5mm Ø mm Ø mm SQ 7nm 7FL71.5 7FL75 7FL7 7FL7S 8nm 8FL71.5 8FL75 8FL7 8FL7S 8nm 8FL71.5 8FL75 8FL7 8FL7S 9nm 9FL71.5 9FL75 9FL7 9FL7S 9nm 9FL71.5 9FL75 9FL7 9FL7S 1nm 1FL71.5 1FL75 1FL7 1FL7S Questions? techstaff@andovercorp.com Edge Filters

46 SteepEdge Longpass Filters Provide very steep ( 1%) cuton slopes Suitable for hightemperature applications Can be cut or machined to smaller sizes SteepEdge Longpass Filters Our steepedge long pass filters employ magnetron sputtered hard oxide coatings to yield deep rejection and a sharp transition to very high transmission. The coatings are deposited on precision polished Fused Silica substrates, and do not employ any absorbing filter glasses, making them suitable for hightemperature applications. They are offered in three standard sizes, with custom sizes available on request. General Specifications Thickness: 1.5 ±.5mm Size Tolerance: +.mm/.mm Min. Clear Aperture: 85% of outside dimension Substrate Material: UV Grade Fused Silica Flatness: 1/ wave/inch TWF Surface Quality: per MILC897A Humidity and Abrasion: Per MILC675A Durability: Per MILC897A Operating Temperature: C to + C Transmission: 91% average Rejection: OD. Cuton Slope: 1% maximum Cuton Tolerance: ± 1% Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Fluorescence Photometry Color Enhancement and Combining Laser studies Andover Corporation Order online: Call tollfree in the US:

47 1 STEEPEDGE LONGPASS FILTER % Transmittance Wavelength (nm) % Point Rejection Band Transmission Band Size, Shape & Part Number 1.5mm Ø 5mm Ø mm Ø mm SQ 5nm 15nm 6nm 5SC11.5 5SC15 5SC1 5SC1S nm nm 7nm SC11.5 SC15 SC1 SC1S 75nm 65nm 857nm 75SC SC15 75SC1 75SC1S nm 9nm 88nm SC11.5 SC15 SC1 SC1S nm nm 589nm SC11.5 SC15 SC1 SC1S nm 9nm 81nm SC11.5 SC15 SC1 SC1S 5nm 59nm 511nm 5SC11.5 5SC15 5SC1 5SC1S nm 588nm 611nm SC11.5 SC15 SC1 SC1S 6nm 67nm 61nm 6SC11.5 6SC15 6SC1 6SC1S 7nm 686nm 711nm 7SC11.5 7SC15 7SC1 7SC1S Questions? techstaff@andovercorp.com SteepEdge Longpass Filters 5

48 Infrared Filters & Coatings Windows & Substrates High optical quality Available from stock Custom sizes available Infrared Windows & Substrates Andover stocks a variety of opticalquality infraredtransmitting substrates. All substrates are optically polished. AR coatings are also available; see next page for details. For convenience, we offer the windows in two standard sizes: 5mm and mm dia. In addition, we can produce custom sizes and shapes. Contact our technical sales department for a quotation. Applications General Specifications Thermal Imaging Weapons Systems Detector Windows IR Photography Thickness: Diameter Tolerance: Surface Quality: CTE: 1. ±.mm +/.1mm / per MILC897A Coefficient of Thermal Expansion (see tables) Threaded ring mounting available see pg 61 for thread sizes Size, Shape & Part Number Substrate Material 5mm Ø mm Ø Silicon (Si) IRWS15 IRWS1 Germanium (Ge) IRWS5 IRWS Sapphire (Al O ) IRWS5 IRWS WaterFree Fused Silica (SiO ) IRWS5 IRWS Calcuim Fluoride (CaF ) IRWS5 IRWS Zinc Selenide (ZnSe) IRWS5 IRWS 6 Andover Corporation Order online: Call tollfree in the US:

49 SILICON Silicon (Si) is an economical choice for many IR applications. Refractive index:. at.µm CTE (1 6 / C):.15 Hardness (Knoop): 8 1 GERMANIUM Germanium (Ge) is widely used for lenses and windows in the MidIR region. Refractive index:. at 1.6µm CTE (1 6 / C): 5.7 Hardness (Knoop): 69 1 % Transmittance 8 1mm thick uncoated sample % Transmittance 8 1mm thick uncoated sample Wavelength (µm) Wavelength (µm) SAPPHIRE WATERFREE FUSED SILICA Sapphire (AlO) is transparent over a wide range, and has excellent mechanical strength. Refractive index: 1.77 at.µm CTE (1 6 / C): 7.7 Hardness (Knoop): 19 1 WF Fused silica (SiO) has excellent transmission in VIS and near IR and exhibits minimal fluorescence. Refractive index: at 1.µm CTE (1 6 / C):. Hardness (Knoop): 71 1 % Transmittance 8 1mm thick uncoated sample % Transmittance 8 1mm thick uncoated sample Wavelength (µm) Wavelength (µm) % Transmittance CALCIUM FLUORIDE Calcium Fluoride (CaF) has good transmission from the UV to the MidIR. Refractive index: 1. at 5.µm CTE (1 6 / C): 18.9 Hardness (Knoop): mm thick uncoated sample % Transmittance ZINC SELENIDE Zinc Selenide (ZnSe) is widely used for lenses and windows in the MidIR region. Refractive index:. at 1.6µm CTE (1 6 / C): 7.6 Hardness (Knoop): 1 1 1mm thick uncoated sample Wavelength (µm) Wavelength (µm) We welcome you to browse our IR surplus online. For IR inquiries: techsales@andovercorp.com Questions? techsales@andovercorp.com Infrared Filters & Coatings 7

50 Infrared Filters & Coatings Broadband Antireflective (AR) Coatings on IR Substrates Broadband AR Coatings on IR Substrates Andover produces a nonradioactive dielectric multilayer coating designed to reduce the reflection of Germanium, Silicon, and other substrates in the infrared. Reflection is reduced from 6% per surface to less than 1% per surface. Reduces reflection from 6% to 1% per surface Constructed of hard, durable, nonradioactive materials Meets MILC897 Constructed of hard, durable firstsurface dielectric coatings on opticalquality germanium substrates, these filters will withstand cleaning and handling associated with any highquality optical component. For convenience, we offer filters in two standard sizes: 5mm and mm dia. In addition, we offer custom sizes and shapes, as well as custom optical characteristics. Contact our technical sales department for a quotation. General Specifications Thickness: 1. ±.mm Diameter Tolerance: +/.1mm Min. Clear Aperture: 9% of outside dimension Substrate Material: Germanium or Silicon (other substrates available) Flatness: waves at 6.8nm Parallelism: <1 arc minutes Surface Quality: 8/ per MILC897A Coating Quality: 8/ per MILC897A hour humidity: per MILC897A Moderate Abrasion: per MILC897A Adhesion: per MILC897A Operating Temperature: 6 C to +71 C Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Thermal Imaging Weapons Systems Detector Windows Dewar Windows 8 Andover Corporation Order online: Call tollfree in the US:

51 Size, Shape & Part Number AR Coating 5mm Ø mm Ø 1 µm coated Germanium Window GEBBAR15 GEBBAR1 5 µm coated Germanium Window GEBBAR55 GEBBAR5 81 µm coated Germanium Window GEBBAR815 GEBBAR81 81 µm coated Germanium Window GEBBAR815 GEBBAR81 1 µm coated Silicon Window SIBBAR15 SIBBAR1 5 µm coated Silicon Window SIBBAR55 SIBBAR5 81 µm coated Silicon Window SIBBAR815 SIBBAR81 81 µm coated Silicon Window SIBBAR815 SIBBAR81 5µm AR COATING 81µm AR COATING.5.5 % Reflection % Reflection Wavelength (µm) Wavelength (µm) 81µm AR COATING 1 1µm AR COATING Coated Ge % Reflection % Transmission 7 Uncoated Ge Uncoated Si Wavelength (µm) Wavelength (µm) We welcome you to browse our IR surplus online. For IR inquiries: techsales@andovercorp.com Questions? techsales@andovercorp.com Infrared Filters & Coatings 9

52 Infrared Filters & Coatings Standard Long Wave Pass Filters Standard Long Wave Pass Filters Long wave pass filters provide a sharp cutoff below a particular wavelength. Often used for order sorting, they isolate broad regions of the spectrum, simultaneously providing high transmission of desired energy, and deep rejection of unwanted energy. Useful for isolating broad spectral regions Constructed of hard, durable firstsurface coatings Available in standard and custom wavelengths Constructed of hard, durable firstsurface dielectric coatings on opticalquality IRtransmitting substrates, these filters will withstand normal cleaning and handling associated with any highquality optical component. For convenience, we offer the filters in two standard sizes: 5mm and mm dia. In addition, we offer custom sizes and shapes, as well as custom optical characteristics. Contact our technical sales department for a quotation. General Specifications Thickness: 1.±.mm Diameter Tolerance: +/.1mm Min. Clear Aperture: 9% of outside dimension Substrate Material: Silicon or Germanium Flatness: 5 waves at cuton W/L hour Humidity: per MILC897A Operating Temperature: 6 C to +71 C Parallelism: <1 arc minutes Transmission (Ave): >85% from 1.5 x cuton to. x cuton Rejection (Ave): <.1% Slope: <7% (1% for 1.5µm filter) Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Order Sorting FTIR Spectroscopy Thermal Imaging Andover Corporation Order online: Call tollfree in the US:

53 STANDARD LONG PASS FILTERS Size, Shape & Part Number 5% point cuton W/L 1.5mm Ø 5mm Ø mm Ø 1.5µm ±.µm 1.5ILP ILP5 1.5ILP 1.65µm ±.7µm 1.65ILP ILP5 1.65ILP.µm ±.9µm.ILP1.5.ILP5.ILP.µm ±.1µm.ILP1.5.ILP5.ILP.µm ±.18µm.ILP1.5.ILP5.ILP 6.µm ±.µm 6.ILP1.5 6.ILP5 6.ILP 7.µm ±.9µm 7.ILP1.5 7.ILP5 7.ILP % Transmission TYPICAL.5µm LONG PASS FILTER P/N.ILPXX Wavelength (µm) Custom IR Long Wave Pass Filters Andover can design and fabricate long pass and short pass filters to suit your particular requirements. Every phase of the process is performed inhouse, including thinfilm coating design, mechanical design, substrate fabrication and coating, inspection, and environmental testing. We can coat a variety of substrate materials, including Germanium, Sapphire, Silicon, Zinc Sulfide, and Zinc Selenide. Contact us for a quotation, whether it is for prototype quantities, or production quantities. CUSTOM LONG PASS FILTERS Size, Shape & Part Number 5% point cuton W/L 1.5mm Ø 5mm Ø mm Ø 1.µm.1µm IRLWP81.5 IRLWP85 IRLWP8.µm 5.µm IRLWP11.5 IRLWP15 IRLWP1 5.1µm 7.µm IRLWP11.5 IRLWP15 IRLWP1 7.1µm 11.µm IRLWP11.5 IRLWP15 IRLWP1 % Transmission TYPICAL IR LONG PASS FILTER Wavelength (µm) We welcome you to browse our IR surplus online. For IR inquiries: techsales@andovercorp.com Questions? techsales@andovercorp.com Infrared Filters & Coatings 51

54 Infrared Filters & Coatings Standard IR Bandpass Filters Useful for isolating narrow spectral regions Constructed of hard, durable firstsurface coatings Available in standard and custom wavelengths up to 1µm Standard IR Bandpass Filters Bandpass filters isolate specific regions of the spectrum, simultaneously providing high transmission of desired energy, and deep rejection of unwanted energy. Available in wide or narrow bandwidths, they can be tailored to suit your specific requirements. Constructed of hard, durable firstsurface dielectric coatings on opticalquality, IRtransmitting substrates, these filters will withstand normal cleaning and handling associated with any highquality optical component. Our standard IR bandpass filters are 5mm in diameter. However, we can produce custom sizes and shapes, as well as custom optical characteristics. Contact our technical sales department for a quotation. General Specifications Diameter Tolerance: +/.1mm Min. Clear Aperture 9% of outside diameter Transmission (Typ.): 75% min, 9% typical Blocking: T <.1% Average to µm hour Humidity: per MILC897A Moderate Abrasion: per MILC897A Adhesion: per MILC897A Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Environmental Monitoring Security Systems FLIR Systems Avionics STANDARD IR GAS ANALYSIS BANDPASS FILTERS 5 Gas Center W/L Bandwidth Blocking Part Number Water Vapor.7 ±.µm 11 ± nm UV to µm.7ga55.95 ±.µm 11 ± nm UV to µm.95ga55 Methane and Ethanol.6 ±.µm 1 ± nm UV to µm.6ga55 Formaldehyde. ±.µm 1 ± nm UV to µm.ga55 SWIR. ±.µm ± nm UV to 7µm.GA5 CO.6 ±.µm 1 ± nm UV to µm.6ga55 CO.67 ±.5µm 1 ± nm UV to µm.7ga55 NO 5. ±.5µm ± nm UV to µm 5.GA55 Broadband 1. ±.µm ± nm UV to 17µm 1.GA5 CO 1.6 ±.1µm 1 ± 1nm UV to 16.5µm 1.GA155 Andover Corporation Order online: Call tollfree in the US:

55 Custom IR Bandpass Filters Andover can design and fabricate custom bandpass filters to suit your particular requirements. Every phase of the process is performed inhouse, including thinfilm coating design, mechanical design, substrate fabrication and polishing, coating, inspection, and environmental testing. For ease of selection, we have created a matrix of typical wavelength ranges and bandwidths which are readily manufacturable. Simply specify the wavelength and bandwidth within the range, and select the appropriate part number. If there is not a suitable filter in the table, please contact us. We can coat a variety of substrate materials, including Germanium, Sapphire, Silicon, Calcium Fluoride, Zinc Sulfide, and Zinc Selenide. Contact us for a quotation, whether it is for prototype quantities, or production quantities. CUSTOM IR BANDPASS FILTERS Substrate Sapphire Germanium CW/L Range (nm) FWHM (%) Transmission (%) Blocking Part Numbers nmnm 1 7 UV to nm IRFC15 nmnm 1 75 UV to nm IRFC15 nmmm 11 8 UV to nm IRFC15 7nm9nm 8 75 UV to CW/Lx1.65 IRFC165 7nm9nm 81 8 UV to CW/Lx1.65 IRFC185 9nm11nm 8 75 UV to CW/Lx1.65 IRFC5 9nm11nm 81 8 UV to CW/Lx1.65 IRFC5 7nm9nm to 1nm IRFC5 7nm9nm to 1nm IRFC65 9nm1nm to 1nm IRFC85 9nm1nm to 1nm IRFC5 Custom spectral and physical properties available upon request % Transmission TYPICAL % IR BANDPASS FILTER 1 1 TYPICAL 1% IR BANDPASS FILTER Wavelength (nm) Wavelength (nm) We welcome you to browse our IR surplus on line. For IR inquiries: techsales@andovercorp.com Questions? techsales@andovercorp.com % Transmission Infrared Filters & Coatings 5

56 Infrared Filters & Coatings Neutral Density Filters Provides attenuation with greater linearity over a wide spectral range Delivers superior durability Custom substrates available IR Neutral Density Filters Metalliccoated infrared neutral density (ND) filters obtain their optical density from a metal alloy coating on a Germanium substrate. Unlike the alldielectric or absorption type, the metallic type ND filter employs a combination of absorption and reflection to reduce the intensity of light. General Specifications % Transmittance TYPICAL 1. ND FILTER Wavelength (µm) Wavelength Range:.µm 1.µm Dimensional Tolerances: ±.mm Thickness: 1.mm Clear Aperture: 9% of outside dimension Surface Quality: 8/ per MIL18B Coating Quality: 8/ per MIL18B Coating Adherence: Per MILM18C Humidity: Per MILSTD81F Substrate Material: Germanium Optical Quality: Flatness of 5 waves per inch and parallelism of 1 arc minutes or better Mechanical: Unmounted Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Thermal Imaging Medical Imaging IR Test Bench IR Photography CUSTOM IR NEUTRAL DENSITY FILTER SPECIFICATIONS Optical Nominal Max Deviation Size, Shape & Part Number Density Transmittance (%) From Nom. (%) 5mm Ø mm Ø..1 ±. FNIR5 FNIR ±. FNIR5 FNIR.6 5. ±. FNIR5 FNIR.9 1. ± 1.5 9FNIR5 9FNIR ± 1.5 1FNIR5 1FNIR ± 1.5 1FNIR5 1FNIR 1.5. ±.7 1FNIR5 1FNIR. 1. ±.5 FNIR5 FNIR /.5 FNIR5 FNIR Set of nine filters (includes storage box) FNIRSET5 FNIRSET 5 Andover Corporation Order online: Call tollfree in the US:

57 Custom IR Coatings Custom IR Coatings Andover Corporation offers optical coatings for the long wave infrared band, on substrate materials such as Germanium, Zinc Selenide, Zinc Sulfide, Silicon and Sapphire. Coating types include AR, bandpass, long and short pass, dichroic, and more. Andover can also design infrared coatings to function as dichroics, reflecting one region while allowing the transmittance of another. While generally operating at or 5, the coatings can be optimized for any particular angle or range of angles of incidence. Also available are custom dichroics that transmit visible while simultaneously reflecting far infrared light. Computercontrolled dicing saw that produces extremely precise and chipfree parts. 1 CUSTOM IR DICHROIC BEAMSPLITTER 1 CUSTOM VIS/IR BEAMSPLITTER 8 8 % Transmission 5 angle, random polarization % Transmission Wavelength (µm) Questions? techsales@andovercorp.com We welcome you to browse our IR surplus online. For IR inquiries: techsales@andovercorp.com Wavelength (µm) Infrared Filters & Coatings / Custom IR Coatings

58 Colored Glass Filters Fabricated from highquality optical filter glass Excellent color consistency as well as sharp contrast Both surfaces precision polished Options span ultraviolet to infrared region Colored Glass Filters Colored glass filters are unique in their ability to transmit a very broad band of light. The long wave pass type, often used as order/wavelength sorting filters, transmit the longer wavelengths and absorb the shorter wavelengths. The bandpass type, useful for enhancing the signaltonoise ratio of illumination systems, transmits a broad band of energy while blocking the shorter and longer wavelengths. As with all optical components, colored glass filters should not be exposed to high temperatures or sharp temperature changes. General Specifications Optical Thickness: mm ±.5mm Mechanical Thickness: Add.8mm for ring mount Size Tolerance: +./.5mm Surface Quality: 8/ per MILM18 Max. Operating Temperature: +1 C Transmitted Wavefront (TWF): 1/ wave per inch Parallelism: arc seconds or better Spectral Data: Stated as internal transmittance Mechanical: Mounted (except for 165mm sq.) Optional: Mounted in threaded ring see pg 61 for thread sizes Applications Machine Vision Astronomy Electronic Instrumentation Calibration Medical Devices Note: Corners are cropped on all 165mm sq. parts unless otherwise requested. Three Class Types BANDPASS TYPE Ultraviolet Transmitting Blue and Blue Green HEAT ABSORBING TYPE Infrared Absorbing LONG WAVE PASS TYPE Near Infrared Transmitting Yellow Orange Red 56 We check all filter glass for striae, bubbles, and inclusions using our tunable interferometer and customdesigned inclusion tester. These instruments detect minute defects, even in materials that do not transmit visible light. Andover Corporation Order online: Call tollfree in the US:

59 BANDPASS TYPE (mm THICK) Internal Transmittance FG FG FG Wavelength (nm) BANDPASS TYPE (mm THICK) S86FG11.95 Internal Transmittance FG FG Wavelength (nm) Size, Shape & Part Number Glass Type 5mm Ø mm Ø mm SQ 165mm SQ UV Transmitting Blue glass 1FG95 5FG95 11FG95 FG115 5FG115 S86FG115 1FG9 5FG9 11FG9 FG11 5FG11 S86FG11 1FG9S 5FG9S 11FG9S FG11S 5FG11S S86FG11S 1FG9165S 5FG9165S 11FG9165S FG11165S 5FG11165S S86FG11165S Questions? techstaff@andovercorp.com Colored Glass Filters 57

60 HEAT ABSORBING TYPE (mm THICK) Internal Transmittance Wavelength (nm) 5FG1 1FG1 FG Size, Shape & Part Number Glass Type 5mm Ø mm Ø mm SQ 165mm SQ Heat Absorbing 1FG15 FG15 5FG15 1FG1 FG1 5FG1 1FG1S FG1S 5FG1S 1FG1165S FG1165S 5FG1165S White Glass 8FG15 95FG15 5FG15 FG15 8FG1 95FG1 5FG1 FG1 8FG1S 95FG1S 5FG1S FG1S 8FG1165S 95FG1165S 5FG1165S FG1165S Green Glass 95FG5 95FG 95FGS 95FG165S LONG WAVE PASS TYPE (mm THICK) Internal Transmittance.9 8FG1 95FG1 5FG1 FG1 95FG Wavelength (nm) Andover Corporation Order online: Call tollfree in the US:

61 LONG WAVE PASS TYPE (mm THICK) Internal Transmittance.9 FG FG 5FG FG 75FG 95FG 515FG5 FG FG5 57FG5 59FG5 61FG7 FG7 65FG7 665FG7 695FG7 715FG7 9FG7 78FG7 8FG7 8FG7 1FG7.9 Wavelength (nm) Size, Shape & Part Number Glass Type 5mm Ø mm Ø mm SQ 165mm SQ Green Glass FG5 FG5 5FG5 FG5 75FG5 95FG5 FG FG 5FG FG 75FG 95FG FGS FGS 5FGS FGS 75FGS 95FGS FG165S FG165S 5FG165S FG165S 75FG165S 95FG165S Orange Glass Red Glass IR Transmitting 515FG55 FG55 5FG55 57FG55 59FG55 61FG75 FG75 65FG75 665FG75 695FG75 715FG75 9FG75 78FG75 8FG75 8FG75 1FG75 515FG5 FG5 5FG5 57FG5 59FG5 61FG7 FG7 65FG7 665FG7 695FG7 715FG7 9FG7 78FG7 8FG7 8FG7 1FG7 515FG5S FG5S 5FG5S 57FG5S 59FG5S 61FG7S FG7S 65FG7S 665FG7S 695FG7S 715FG7S 9FG7S 78FG7S 8FG7S 8FG7S 1FG7S 515FG5165S FG5165S 5FG5165S 57FG5165S 59FG5165S 61FG7165S FG7165S 65FG7165S 665FG7165S 695FG7165S 715FG7165S 9FG7165S 78FG7165S 8FG7165S 8FG7165S 1FG7165S Questions? techstaff@andovercorp.com Colored Glass Filters 59

62 Calibration Filter Sets Spectrophotometric glass filters for verifying transmittance and absorbance scales Calibration standards traceable to NIST Shipped in a durable aluminum storage case Calibration Filter Sets Andover offers two filter sets for verifying the transmittance and absorbance scales of visible absorption spectrophotometers with maximum bandwidths of.nm and 6.5nm. Made of uncoated Schott NG and NG5 glass, the filters are polished over the central 5mm x mm area to a transmitted wavefront of 1/ wave or better at 6nm, with a parallelism of arc seconds or better. The transmission value of each filter is measured on a spectrophotometer calibrated with standards directly traceable to the National Institute of Standards and Technology (NIST). General Specifications Each filter is mounted in a black anodized aluminum holder compatible with the 1cm cuvette holder supplied with most spectrophotometers. Individual filters have removable shutters to protect the glass from damage. Every filter set is shipped with a Certificate of Calibration stating the transmission value of each filter at wavelengths of nm, 65nm, 56.1nm, 59nm and 65nm. AC9 Filter Set The AC9 calibration filter set consists of three absorption glass filters and one blank holder to be used as a balancing filter. The nominal transmittance values of these filters are 1%, %, and %. AC19 Filter Set The AC19 filter set consists of three absorption glass filters and one blank holder to be used as a balancing filter. The nominal transmittance values of these filters are 1%, %, and %. Description Transmittance Values Part Number AC9 Filter Set 1%, %, % AC9 AC19 Filter Set 1%, %, % AC19 Recertification Service Each calibration filter set is certified for two years. At the end of that period, sets should be returned to Andover Corporation in their original shipping box for cleaning and recertification. Please contact the sales department at (888) for pricing and lead time, before returning your filter set. Andover Corporation Order online: Call tollfree in the US:

63 Threaded Filter Rings Industrystandard sizes Adaptable to most of our standard products Laserengraved identification Threaded Filter Rings In addition to our standard rings, Andover offers a variety of threaded ring mounts. Standard sizes and thread pitches enable the user to securely attach the filter to equipment. Please contact our technical sales department to discuss your requirements. THREADED RING SIZES AVALIABLE Thread size (mm) OD (mm) Clear aperture (mm) Part Number M7. x RINGM7 M.5 x RINGM.5 M7. x.75 9 RINGM7 M.5 x RINGM.5 M6. x RINGM6 M9. x RINGM9 M5. x RINGM5 Questions? techstaff@andovercorp.com Calibration Filter Sets / Accessories 61

64 Motorized Filter Wheel Motorized or Manual Local or Remote Control Accepts 1.5mm and 5mm diameter filters Labeled filter positions Base and post mountable Programmable filter sequences Very small footprint suitable for tight space requirements Motorized Filter Wheel Filter wheels are used in a host of applications, including color CCD photography, fluorescence microscopy, and photometry. Two " diameter wheels are available: a sixposition 5mm filter wheel and a twelveposition 1.5mm filter wheel. Applications Color CCD Photography Fluorescence Microscopy Photometry General Specifications Interfaces included: Serial: RS USB: USB. Manual: Push button switches Mounting: 1/ & #8 (M6 & M) Size: 5. x.9 x PROGRAMMING AND REMOTE CONTROL Automation of filter sequences is available through the USB. or serial (RS interface) using LabVIEW software for both Mac and Windows platforms. A simple command language facilitates retrieving filter status and making filter selections. The unit comes with the controller, filter housing, filter wheel, a 5 VDC power supply and threaded retaining rings to hold the optics in place. Andover Corporation Order online: Call tollfree in the US:

65 Remote or Manual Operation Filter selection can be made manually from push buttons on the unit, or remotely from either a USB. or serial (RS ) interface. Interchangeable Filter Wheels The " diameter wheel is easily changed, allowing quick conversions between applications. Additional wheels are available. MOTORIZED FILTER WHEEL Size & Part Number Description 1Position / 1.5mm 6Position / 5mm Motorized filter wheel FWMOT1.5 FWMOT5 Extra wheel only FW1.5 FW5 MANUAL FILTER WHEEL Size & Part Number Description 1Position / 1.5mm 6Position / 5mm Manual filter wheel FWMAN1.5 FWMAN5 Questions? techstaff@andovercorp.com Accessories 6

66 Temperature Controller Provides added control over ambient temperatures Effective for conducting outdoor experiments Custom sizes and temperature ranges also available Provides stability with varying ambient temperatures Our Temperature Controllers are subjected to a 1 hour stability test. Calibration of wavelength tuning with temperature setting is available Temperature Controller The performance of very narrow bandwidth interference filters can suffer significantly due to changes in ambient temperature. The regulated temperature controller provides protection against the influences of fluctuating ambient temperatures, and provides a means of tuning the center wavelength to an exact value. Andover s temperature controllers are extremely stable, and regulate over a broad range ( to C). All temperature controllers include an assembly kit which enables the user to install their own filters in the controller, if desired. The assembly kit includes opticalquality BK7 or Fused Silica windows which are A/R coated in a userselectable range. Shipped in a sturdy, reusable weatherproof case, all of our temperature controllers include a universal power adaptor, which will operate from 11 to volts, Hz, and include plugs for US, UK, Australia, and Europe. General Specifications Regulation Accuracy: +/.5ºC Ambient Temperature Range: ºC Min. Regulated Temperature: ºC Max. Regulated Temperature: ºC Power Requirements: 11VAC, Hz, 1.A Filter Size: mm or 75mm diameter Custom adapters for smaller sizes available at a nominal charge. Temperature C STABILITY TEST ( cycles shown) : 6: 9: 1: 15: 18: 1: Elapsed Time (hours) 6 Andover Corporation Order online: Call tollfree in the US:

67 ORDERING: To ensure you have the appropriate filter oven and controller that best suits your needs, please follow steps 1 and. Step 1 Select temperature controller size Temperature Controller Part Number mm 11FRDC1 75mm 11FRDC175 Step Select the assembly kit that best suits your needs AR Coating W/L Range Part Number nm to nm 11FRDC1KIT nm to 7nm 11FRDCKIT 7nm to 1nm 11FRDCKIT 1nm to1nm 11FRDCKIT The assembly kits include the necessary hardware to mount a filter into the filter oven, as well as instructions for assembly. The windows supplied are broadband antireflective (AR) coated over the specified wavelength range for an average reflectance of.5% per surface. The substrate material is either Schott BK7 or Fused Silica, as appropriate, and polished to a 1/ wave flatness, with a parallelism of arc seconds or better. Questions? techstaff@andovercorp.com Accessories 65

68 Epolite FH51 Epoxy Ideal for bonding a variety of substrates and potting electronic assemblies Excellent chemical resistance, and mechanical strength Epolite FH 51 Epoxy Fuller Epolite FH51 is a 1% solid, roomtemperature curing, optically clear, electrical grade epoxy. Proven to be a superior bonding agent for ferrite pot cures, this system is designed for continuous operation at temperatures up to F. Resin and hardener are sold individually or in kits, and in premeasured APaks. EPOXY Type Weight & Content Part Number Premeasured APak 5. grams Resin,.8 grams Hardener FH51AAPAK Resin & Hardener Kit 16oz. Resin, oz. Hardener & 6 Droppers FH51AKIT Resin Only 16oz. 6oz. 18oz. FH51ARESIN/16 FH51ARESIN/6 FH51ARESIN/18 Hardener Only oz. 8oz. 16oz. FH51AHARD/ FH51AHARD/8 FH51AHARD/16 66 Andover Corporation Order online: Call tollfree in the US:

69 Certified results from an independent testing lab GENERAL PROPERTIES VALUE TEST METHOD Specific Gravity 1.17 ASTMD79 Hardness, Shore D 81 ASTMDe1 Strength Tensile 7,9 psi ASTMD68. Shear 78 psi ASTMD11 Compressive 15, psi ASTMD69a Flexural 1,8 psi ASTMD79 Coefficient of Linear Thermal Expansion 9.5 ppm/ºc ASTME81 Mixed Viscosity 1,97 cp MILSTD88E Pot Life Minutes at 77ºF ERF 17 Cure Schedule Hours at 77ºF 1 Cure Schedule Hours at 1ºF 1 Mix Ratio by Weight (A:B) 1:15 ELECTRICAL PROPERTIES Dielectric Strength,18 volts/mil ASTMD1997a Dielectric Hz.6 ASTMD1.98 Dissipation Hz.1 ASTMD1.98 Volume Resistivity, ohm/cm 8. x 1 1 ASTMD57.99 CHEMICAL RESISTANCE Isopropyl Alcohol Weight Change.15% ASTMD5.95 Thickness Change.9% ASTMD5.95 Jet A Weight Change.% ASTMD5.95 Thickness Change.519% ASTMD5.95 OUTGASSING PROPERTIES Total Mass Loss.56% ASTME59e Collected Volatile Condensable Material <.1% ASTME59e Water Vapor Regain.9% ASTME59e Questions? techstaff@andovercorp.com Accessories 67

70 GLOSSARY A AR Coating Absorptance Antireflective coating that reduces the surface reflection of an optic The ratio of absorbed to incident radiation F FabryPerot Filter Dielectric filter construction based on the FabryPerot interferometer. Consists of two reflective stacks separated by an evenordered spacer Far Infrared (wavelengths from 6µm to µm) B BW Bandwidth FWHM Full width at half maximum or the bandwidth of the filter Bandpass Filter Bandwidth A filter that transmits a specific band of energy and rejects all other energy at higher and lower wavelengths The spectral width of a filter measured at half of the peak transmission; also referred to as full width at half maximum (FWHM) H Hot Mirror A filter that reflects the near infrared energy (heat) and transmits the visible energy Blocking Range The spectral range of unwanted radiation I Image Quality A filter designed for use in imaging applications C Cavity Center Wavelength An internal structure of a bandpass filter, consisting of two reflecting stacks of dielectric material separated by an evenordered spacer. The number of cavities determines the shape of the passband The wavelength coinciding with the midpoint of the passband Index of Refraction Interferometer IR The ratio of the velocity of light in a vacuum to the velocity of light in a refractive material An instrument that measures the accuracy of an optical element utilizing interference phenomena based on the wave characteristics of light Infrared Spectrum (wavelengths from.5µm to µm) Cold Mirror Commercial Quality A filter which reflects the visible energy and transmits the near infrared energy A filter designed for use in nonimaging instrumentation applications L Long Pass Filter A filter which transmits the longer wavelengths and rejects the shorter wavelengths CWL Center wavelength 68 Andover Corporation Order online: Call tollfree in the US:

71 M MDM MWIR MetalDielectricMetal Midwave Infrared Spectrum (.6µm to 6.µm) S Short Pass Filter Spectrophotometer A filter that transmits the shorter wavelengths and rejects the longer wavelengths An instrument that measures intensity of light at varying wavelengths N N* The effective refractive index of the filter SWIR Shortwave Infrared Spectrum (1.5µm to.µm) ND Filter NIR A neutral density filter that transmits a specific amount of energy equally over all wavelengths Near Infrared Spectrum (wavelengths from 7nm to 1.5µm ) T T or Tx Transmittance Transmittance Transmittance is the fraction of incident light which passes through a filter P Passband Polarization The band of energy that is transmitted (passed) by the filter A process or state in which rays of light exhibit different properties in different directions, especially the state in which all vibration takes place in one plane U UV Ultraviolet spectrum, typically defined as the (wavelengths from nm) R R/T ratio The ratio of reflectance to transmittance V VIS Visible spectrum (wavelengths from nm to 7nm) Reflectance The ratio of the total amount of radiation reflected by a surface to the total amount of radiation incident on the surface Refractive Index The ratio of the velocity of light in a vacuum to the velocity of light in a refractive material Questions? techstaff@andovercorp.com Glossary 69

72 INTERNATIONAL REPRESENTATIVES Canada Delta Photonics Unit A6, 85 St. Laurent Blvd Ottawa, ON, K1G Z Canada Tel: Fax: sales@deltaphotonics.com China DynaSense Photonics Co., Ltd. E915, Morgen Center, No. 6 Taipingjie, Xicheng District Beijing 1 China Tel: Tel: Fax: info@dynasense.com Titan ElectroOptics Co., Ltd. China Rm. 176, North Wing, The Gate Tower B No.19, Zhongguancun Avenue, Haidian District Beijing 18 P.R. China Mob: Tel: ext. 15 Fax: danielfeng@teo.com.cn Wuhan BeiYe Tech Co., Ltd. Room A, ZhaoFuGuoJi Bldg. No. 717, Wuluo Road, Hongshan Wuhan 7 P.R. China Tel: Cell: Fax: sales@waittech.cn France LOTQuantumDesign s.a.r.l. Immeuble Les Conquérants Bâtiment Mac Kinley 1, avenue de l Atlantique 919 LES ULIS France Tel: + () Fax: + () info@lotqd.fr Technical info: ouhaddou@lotqd.fr Germany LOTQuantumDesign GmbH Im Tiefen See Darmstadt Germany Tel.: +9 () Fax: +9 () info@lotqd.de Technical info: hanf@lotqd.de Hong Kong Wait Technology (HK) Limited 5/F Hong Kong Trade Centre, Des Voeux Road Central, Hong Kong, Hong Kong Tel: Fax: sales@waittech.cn India Liberty International 1 Bethany Avenue Chino, CA 9171, USA Tel: Fax: bobliberty@sprintmail.com Ireland & UK QuantumDesign UK and Ireland Ltd. 1 Mole Business Park Leatherhead Surrey KT 7BA UK Tel: + () Fax: + () info@lotqd.co.uk Italy LOTQuantumDesign s.r.i. Via Francesco Sapori 7 1 Roma Italy Tel: +9 Fax: ramberti@lotqd.it Japan Hi Technology Trading Inc. 7 Nihonbashiohdenmacho Chuoku Tokyo 111 Japan Tel: Fax: sales@hitechnolgy.co.jp Korea Dongwoo Optron Co., Ltd. 18 HoeanDaero OpoEup, Gwangjusi, GyeonggiDo, 1798 South Korea Tel: Fax: optron@optron.co.kr LK Co., Ltd. ho, 187, Techno ro Yuseonggu, Daejeon, 5 Korea Tel: Fax: sales@lk.kr MJL Crystek, Inc. # 1117 Expotel Dunsandaero, 117beongil SeoGu, Daejon, 5 South Korea Tel: Fax: jason@mjlinc.com The Netherlands & Belgium Laser Benelux CV P.O. Box 65 Zj Vinkeveen Netherlands Tel: +1() Fax: +1() info@laser.nl LOTQuantumDesign BeNeLux Victor Soensstraat B185 StrombeekBever Belgium Tel: + 8 Fax: info@lotqd.be 7 Andover Corporation Order online: Call tollfree in the US:

73 Te Lintelo Systems BV Mercurion 8A 69 PZ Zevenaar Netherlands Tel: Fax: contact@tlsbv.nl Poland LOTOriel Polska Szyb Walenty 171 Ruda Szaska Poland Tel: Mobile: Fax: info@lotqd.pl Russia AcademLot ul. Butlerova Moscow Russia Tel: Fax: academ@lotqd.com Technical info: hanf@lotqd.de Spain & Portugal LOTQuantumDesign Iberia Roca i Roca, 5 86 Terrassa (Barcelona) Spain Tel: Fax: info@lotqd.es Technical info: hanf@lotqd.de Sweden, Denmark, Finland & Norway LOTQuantumDesign Nordic Nordic Division Roddarestigen 18 5 Danderyd Sweden Tel: Fax: info@lotqd.se Technical info: hanf@lotqd.de Switzerland LOTQuantumDesign AG Route du Roule 1 CH17 Marly Switzerland Tel: Fax: info@lotqd.ch Taiwan ROC Unice EO Services, Inc. No. 5, Andong Road Chung Li District Taoyuan, Taiwan 6 (R.O.C.) Tel: Fax: unicehq@unice.com.tw UK & Ireland QuantumDesign UK and Ireland Ltd. 1 Mole Business Park Leatherhead Surrey KT 7BA UK Tel: + () Fax: + () info@lotqd.co.uk Technical info: davidwest@lotqd.co.uk USA, Corporate Headquarters Andover Corporation Commercial Drive Salem, New Hampshire 798 USA Tel: Fax: US Tollfree: techstaff@andovercorp.com Please visit for the most uptodate listing of international representatives. Questions? techstaff@andovercorp.com International Representatives 71

74 INDEX 7 A B C Absorbance Calibration Filters... Absorbance Calibration Filter Set.... Absorptive Neutral Density Filters... Absorptive Neutral Density Filter Sets...5 Accessories Epoxy, Optical...66 Filter Wheels...6 Temperature Controllers...6 Threaded Rings...61 Adhesive, Optical Analytical Line Filters...1 Angle of Incidence Effects...1 Antireflective Coatings Infrared... 9 Astronomy Filters UBVRI... Bandpass Filters Infrared....5 Image Quality....8 Near Infrared...19 SemiCustom...6 Standard Products...1 Ultraviolet...15 Visible...17 Calcium Fluoride (CaF) windows... 7 Calibration Filters, Absorbance Type... Coatings Infrared....6 Metallic Neutral Density Filters, VIS.... Metallic Neutral Density Filters, IR Cold Mirrors...7 Color Additive Filters....8 Color Additive Filter Set... Color Processing Filters...8 Color Processing Filter Set....1 Color Reflective Filters...8 Color Subtractive Filter Set.... Colored Filter Glass...56 Controller (Filter Temperature)... 6 Custom Filters Bandpass, UVVISNIR... 8 Bandpass, IR... Long and Short Pass, IR...51 CutOn Filters (LWP) UVVISNIR... IR...51 CutOff Filters (SWP) UVVISNIR... CutOn, CutOff Filter Sets (LWP/SWP)... Density, (Neutral Density) Absorbing Glass Type... Absorbance Calibration Filters.... Ultraviolet/Visible/Near Infrared... Visible/Near Infrared... Neutral Density Sets...5 Metallic Coated... Absorption... Dichroic Filters Color Additive and Subtractive....8 Color Reflective Filters, Blue/Red... 8 Dichroic Filter Sets Color Additive... Color Processing...1 Color Subtractive... Edge Filters (LWP/SWP) Near Infrared Long Wave Pass... Near Infrared Short Wave Pass... Visible Long Wave Pass Filters... Visible Short Wave Pass Filters... Epolite FH51 Epoxy Epoxy, Optical Color Reflective Filter Set.... Color Subtractive Filters... Andover Corporation Order online: Call tollfree in the US: D E

75 F Fabrication and Polishing...6 Filters H Hard Coat Narrowband Filters... HighTransmitting Bandpass Filters Bandpass...1 Color Additive, Color Subtractive... Heat Control Filters Color Processing Filters....1 Hot Mirrors...6 Colored Filter Glass...56 Cold Mirrors...7 Dichroic...8 Infrared Suppression....7 Dichroic Filter Sets.... Ultraviolet Cold Mirror...7 Edge Filters LWP/SWP... Heat Control Filters...6 Cold Mirrors...7 HighTransmitting Bandpass Filters....1 Hot Mirrors...6 Infrared Bandpass...5 Infrared Long Wave Pass.... Infrared Neutral Density...5 Infrared Suppression Filters....7 Ultraviolet Cold Mirrors...7 Image Quality Filters...8 Long Wave Pass... Neutral Density Filters... Short Wave Pass... Ultraviolet Filters...1 Filter Ovens (Temperature Controllers)...6 Filter Rings...61 Filter Sets Dichroic Filter Sets.... Neutral Density Filter Sets...5 I Image Quality Filters....8 Infrared Suppression Filter...7 Infrared Antireflective Coatings....8 Infrared Bandpass Filters...5 Infrared Long Wave Filters... Interference Filters (Bandpass) Ultraviolet Filters...15 Visible...16 Near Infrared...19 Infrared....5 Interference Filters (CutOn, CutOff) Visible Long Wave Pass... Visible Short Wave Pass... Near Infrared Long and Short Pass... Infrared Long Wave Pass.... Interference Filter Sets Dichroic Filter Sets.... International Representatives....7 Filter Wheels....6 G Fused Silica Windows...6 General/Technical Information...1 Germanium Windows...6 Glass L Long Wave Pass (Dielectric)... Visible Long Wave Pass... Near Infrared Long Wave Pass... Infrared Long Wave Pass Long Wave Pass (Filter Glass) Filter Glass...56 Infrared Windows and Substrates...6 Glossary...68 Questions? techstaff@andovercorp.com Index 7

76 INDEX M Metallic Neutral Density Filters Ultraviolet/Visible/Near Infrared... P Polishing and Fabrication...6 Visible/Near Infrared... Metallic Neutral Density Filter Sets...5 Mirrors Cold Mirror (Heat Transmitting)...7 R Red Dichroic Filter...8 Reflective Filter (Blue)...8 Reflective Filter (Red)....8 Hot Mirrors (Heat Reflecting)...6 Infrared Suppression...7 Ultraviolet Cold Mirror...7 S Sapphire Windows...7 Schott Filter Glass...56 N Narrowband Hard Coat Filters... Narrowband Interference Filters...1 Near Infrared Interference Filters (SemiCustom)..6 Near Infrared Interference Filters (Standard)...19 Near Infrared Long Wave Pass Filters... Near Infrared Short Wave Pass Filters... Near Infrared Suppressors...7 Neutral Density Filters SemiCustom Bandpass Filters...6 Sharp Cut Filters (LWP/SWP)... Sharp Cut Filter Glass...59 Short Wave Pass Filters... Silicon Windows...7 Spectrophotometer Calibration Filters... Standard Bandpass Filters...1 SteepEdge Longpass Filters... Substrates, Infrared...6 Absorption... Metallic Coated (UVVISNIR)... Metallic Coated (IR)...5 Neutral Density Filter Sets Absorption...5 T Temperature Controllers...6 Temperature Coefficient Chart...1 Threaded Rings...61 Metallic Coated (UVVISNIR)...5 O Metallic Coated (IR)...5 Optical Fabrication and Polishing...6 Optical Interference Filters Bandpass (UVVISNIR)...1 Bandpass (IR)...5 U UBVRI Filters... Ultraviolet Cold Mirror....7 Ultraviolet Interference Filters (SemiCustom)...6 Ultraviolet Interference Filters (Standard) Universal Oven Controller...6 Dichroics...8 Heat Control (Hot/Cold Mirrors)...6 Image Quality....8 Infrared....6 V Visible Interference Filters (SemiCustom)....6 Visible Interference Filters (Standard)...1 Long Wave and Short Wave (UVVISNIR).. Long Wave (IR)... Ordering Information....Inside Back Cover 7 Andover Corporation Order online: Call tollfree in the US:

77 W Wavelength Shift With Angle of Incidence...1 Wavelength Shift With Temperature...1 Windows, InfraredTransmitting...6 Z Zinc Selenide Windows...7 Thank you for your interest and patronage! ~ The Andover Corp. Team Copyright Andover Corporation 17 Revision: X Questions? techstaff@andovercorp.com Index 75

78 Ordering Information PRICING Current prices are available at by clicking on the part numbers for particular items. For a complete price list or a specific quote, please contact our sales department. Contact information is available on the next page. PURCHASE ORDERS Andover Corporation accepts , written, and online orders from customers with an open line of credit. New customers must confirm their orders in writing and supply credit references upon request. BLANKET ORDERS Andover Corporation can help reduce your inventory by scheduling automatic delivery of your order over time. Complete details are available at: com/info. PAYMENT TERMS Net days from date of invoice for customers with established lines of credit. International customers should check with the sales department to determine if prepayment is required. All foreign orders are subject to shipping and banking fees, and will be screened for compliance with export regulations. For blanket orders, please contact our sales department for special terms and conditions. VISA, MasterCard and American Express and wire transfers are accepted. RETURN POLICY Andover Corporation accepts returns of defective items up to one year from the invoice date. Before returning any items, please contact our Technical Sales Staff for a Return Goods Authorization (RGA) number and complete shipping instructions. For details see: SHIPPING Most standard items ship within two days of receipt of an order. All outofstock products are shipped within two weeks. For rush orders, OneDay Shipping may be available. All prices are EXW Salem, New Hampshire, USA. Shipments are freight prepaid and billed to the buyer, or charged to your own shipping account. 76 Andover Corporation Order online: Call tollfree in the US: