ANDOVER CORPORATION Quality Optical Filters and Coatings

Transcription

1 ANDOVER CORPORATION Quality Optical Filters and Coatings 29-21

2 Andover Corporation As a recognized leader in the manufacture of high-quality 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 Andover Corporation 4 Commercial Drive Salem, New Hampshire Tel: Fax: US toll-free: International: techstaff@andovercorp.com take it as a personal challenge to innovate along with our customers, designing and delivering precision solutions for use in air, water, and gas analyzers, chemical analysis, machine vision, medical diagnostics, and astronomy. Whether you need just one custom filter or thousands of off-the-shelf 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 they value the following key Andover advantages: Exceptional Reliability Extensive Standard Offering Custom Design Expertise Andover s filters and coatings far exceed the industry standard for quality. This precision reflects the fact that Andover Corporation is among the only optical filter manufacturers to design their own state-of-theart equipment and to control the entire production process. Andover maintains an inventory over 1, 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. The engineers at Andover can meet your most demanding requirements for custom filters and coatings. Over more than 3 years in business, we ve designed products for such advanced applications as medical instrumentation, machine vision, fluorescence studies, astronomical observation, telecommunications, and space-borne and defense systems.

3 Contents Frequently Asked Questions Attention to. Service Thank you for your interest in our latest catalog of products and services. If there is a type of filter you need but don t see available, please let us know. We value your business and take great pride in responding quickly whenever you require a customized solution. We also welcome any comments you may have about how we might serve you better. Flexibility is the hallmark of our company. Our highly experienced technical sales staff will help you get the products you need at the right time and the right price. And when you call Andover, you can be confident that a knowledgeable staff person will always be available to answer your questions. Extras Making. the Difference Unlike most optical filter manufacturers, we supply exact spectral curve data with all 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. Ordering Information About Bandpass Filters Minimizing Wavelength Shift Basic Filter Types Standard Bandpass Filters Products Sets Semi-Custom Bandpass Filters Products Temperature Controllers Custom Capabilities Fabrication Polishing Coatings Far Infrared Coatings Image Quality Filters Quality Control Astronomy Filters UBVRI Nebula Neutral Density Filters Metallic Coated Absorptive Sets Heat Control Filters Hot Mirror Cold Mirror Ultraviolet Cold Mirror Infrared Suppressing Dichroic Filters Dichroic Filters Sets Edge Filters Long Wave Pass Short Wave Pass Sets Beamsplitters Storage Cases Infrared Filters Infrared Windows and Substrates Antireflective Coatings Long and Short Wave Pass Bandpass IR Neutral Desity Filters Colored Glass Filters Epolite FH-5313 Epoxy Accessories Filter Wheels Calibration Filter Sets AC AC Recalibration Service Glossary International Representatives Index New! New! New!

4 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 fabricate high-quality 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 can have the same spectral characteristics as image quality filters, but they are designed for use in instruments rather than imaging applications. (See page 26 for details.) 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. 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. Does it matter which way I mount a filter? As a rule, the highly reflective (shinier) side of the filter should face the source of radiation. This minimizes the thermal load on the absorbing glass blocking components and epoxies, extending the life of the filter. 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. When can I expect to receive my order? Standard products ship within two to three days of receipt of order. How quickly can I get a quote? We respond within 24 hours and deliver a written estimate within two to three days. Do you offer discounts on surplus stock? Andover offers generous price terms on our surplus inventory. Just visit our website at com/search/ and plug in the desired wavelength to see what s available. Do you charge a premium for small quantities? No, there is no extra charge even when you order a single item. How do I send custom specifications for quoting? You can do this one of two ways: 1. your request to. sales@andovercorp.com 2. Fax your specifications. to Attn: Technical Sales Dept. Do you provide a small quantity for prototyping? Yes, once you approve the pricing for your order, we will be happy to provide a few prototype pieces. Andover Corporation Order online: Call toll-free in the US:

5 Ordering Information Four Ways to To Order Online Telephone US toll-free international Fax Pricing Current prices are available at andovercorp.com by clicking on the part numbers for particular items. For a complete price list or a specific quote, please contact our sales department. 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 you order over time. Complete details are availble here:. Payment Terms Net 3 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. For blanket orders, please contact our sales department for special terms and conditions.. Visa, MasterCard and American Express accepted. Shipping Most standard items ship within two days of receipt of an order. All out-of-stock products are shipped within two weeks. For rush orders, oneday shipping may be available. All prices are FOB Salem, New Hampshire, USA.. Shipments are freight prepaid and billed to the buyer. Order online for free ground shipping within the US. 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. Limited Warranty Andover warrants that all products shall conform to the product specifications and shall be free from defects in materials and workmanship for a period of one year from date of purchase. This Limited Warranty shall not apply in the event of any failure caused by accident, misuse, neglect, alteration or improper installation or repair by the purchaser. Disclaimer of other warranties. The limited warranty set forth above is in place of other warranties, express or implied, and Andover expressly disclaims all other warranties, including warranties of merchantability and fitness for a particular purpose. Specifically, it is the purchaser s responsibility to test and determine the suitability of the products for purchaser s intended use, which shall be the sole responsibility of the purchaser. Limitation of remedies and damages. Andover s sole obligation and the purchaser s sole and exclusive remedy under the Limited Warranty set forth above shall be limited to (a) replacement of defective products provided that written claim of the defect is sent to Andover within the Limited Warranty period, the original product is returned with transportation prepaid, and Andover s inspection establishes the existence of such defect; or (b) at the sole discretion of Andover, return of the original purchase price received by Andover from the purchaser. Andover shall in no event be liable for any damages, including without limitation, lost profits, incidental or consequential damages by reason of or in connection with the purchase or use of the products. Indemnification. The purchaser agrees to indemnify and hold Andover harmless from and against any claim, loss, cost or expense resulting from purchaser s use of the products, whether such claim arises in contract, tort or otherwise. Governing law. All matters arising under this Limited Warranty and other terms and conditions of sale shall be governed by the laws of the State of New Hampshire. The purchaser consents to the exclusive jurisdiction of the courts of the State of New Hampshire in all matters relating to the purchase, sale and use of the products. Questions? techstaff@andovercorp.com Ordering Information 3

6 About Bandpass Filters The use of bandpass filters is one of the simplest and most economical way to transmit a well-defined band of light and to reject all other unwanted radiation. Their design is essentially a thin film Fabry-Perot interferometer formed by vacuum deposition, and consists of two reflecting stacks separated by an even-order spacer layer. Because the Fabry-Perot filter is essentially Lorentzian in shape, the cut-on and cut-off slopes are shallow and the rate of attenuation in the out-of-band blocking range locking band, we introduce more cavities into the construction of our standard dielectric bandpass filters. Minimizing Wavelength Shift Ambient temperature and optical path geometry are important factors to consider in selecting or specifying bandpass filters. 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 ambient temperature of passband filters. (For more information, see page 23.) Temperature Wavelength Shift Coefficient.35 Temperature Coefficient (nm/ C) Center Wavelength (nm) Angle of Incidence The central wavelength of the all-dielectric Fabry- Perot 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 in 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: λθ = 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 non-collimated 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 off-angle. To approximate this shift, use this same formula and divide the results by two. (This approach works in systems where the full cone angle is up to 2.) Andover Corporation Order online: Call toll-free in the US:

7 Spectral Profiles for Andover s 1 Basic Filter Types Type x Peak Tx.5 x Peak Tx 1 Cavity Nom..25 x FWHM FWHM Type x Peak Tx.5 x Peak Tx 2 Cavities Nom..5 x FWHM FWHM % Normalized Transmittance Max 3 x FWHM Max 1 x FWHM Max 2 x FWHM % Normalized Transmittance Max 15. x FWHM Max 2. x FWHM Max 3.5 x FWHM Max 6.3 x FWHM.1 Wavelength.1 Wavelength Type x Peak Tx.5 x Peak Tx 3 Cavities Min.65 x FWHM FWHM Type x Peak Tx.5 x Peak Tx 4 Cavities Min.8 x FWHM FWHM % Normalized Transmittance Max 5.4 x FWHM Max 1.5 x FWHM Max 2.2 x FWHM Max 3.2 x FWHM % Normalized Transmittance Max 1.3 x FWHM Max 1.8 x FWHM Max 2.25 x FWHM 1-4 Max 4.25 x FWHM Wavelength Max 15. x FWHM Wavelength Max 12. x FWHM Normalized Transmittance of Peak (%) Full Bandwidth Multiplier (FWHM) Cavity 2 Cavities 3 Cavities 4 Cavities nom..5 nom undefined undefined undefined Questions? techstaff@andovercorp.com About Bandpass Filters 5

8 Normalized Transmittance of Peak (%) Full Bandwidth Multiplier (FWHM) 5 Cavity 6 Cavities Type x Peak Tx.5 x Peak Tx 5 Cavities Min.85 x FWHM FWHM Type x Peak Tx.5 x Peak Tx 6 Cavities Min.85 x FWHM FWHM % Normalized Transmittance Max 1.25 x FWHM Max 1.65 x FWHM Max 1.95 x FWHM 1-4 Max 3.85 x FWHM % Normalized Transmittance Max 1.18 x FWHM Max 1.45 x FWHM Max 1.95 x FWHM 1-4 Max 3.2 x FWHM Wavelength Max 1. x FWHM Wavelength Max 5. x FWHM Type 7 1. MDM 1nm Bandwidth MDM= Metal-Dielectric-Metal % Normalized Transmittance x Peak Tx.93 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 x CW/L 6 Andover Corporation Order online: Call toll-free in the US:

9 Type 8 1. MDM 25nm Bandwidth % Normalized Transmittance x Peak Tx.85 x CW/L.8 x CW/L.7 x CW/L CW/L FWHM 1.12 x CW/L 1.2 x CW/L 1.35 x x CW/L Wavelength Type 9 1. MDM 7nm Bandwidth % Normalized Transmittance x Peak Tx.8 x CW/L.75 x CW/L.7 x CW/L CW/L FWHM 1.25 x CW/L 1.4 x CW/L 1.65 x CW/L Wavelength Type 1 1. MDM 8 1nm Bandwidth % Normalized Transmittance x Peak Tx.85 x CW/L.8 x CW/L FWHM 1.2 x CW/L 1.35 x CW/L x CW/L CW/L 1.6 x CW/L Wavelength Questions? techstaff@andovercorp.com About Bandpass Filters

10 Standard Bandpass Filters 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 Andover offers one of the most extensive selections of bandpass filters in the industry, including many of the primary laser, mercury, biomedical, and analytical spectral lines. 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. GENERAL SPECIFICATIONS Diameter Tolerance +/-.25mm Usable Aperture Filter Size Usable Aperture mm Ø 9.mm Ø mm Ø 21.mm Ø... 5.mm Ø 45.mm Ø Surface Quality 8 5 (Per MIL-PRF-1383B) Optical Quality Commercial instrumentation grade Out-of-Band Blocking 1 x 1-4 from X-ray to FIR Specification Temperature +23 C Max. Survival. Temperature Range CW/L nm -5 C to +5 C... CW/L nm -5 C to +7 C Humidity Resistance Per MIL-C-48497A Mechanical Mounted in an anodized aluminum ring (Optional threaded rings available). Applications Spectral Radiometry Medical Diagnostics Chemical Analysis Colorimetry Line cw/l (nm) fwhm (nm) Cavities/ Filter Type Min. T (%) N* Max. Thickness (mm) 12.5mm Ø 25mm Ø 5mm Ø Zn /- 1 ±2 MDM/ FS FS FS1-5 Zn 214. ±3 22 ±4 MDM/ FS FS FS ±2 MDM/ FS FS fs1-5 Cd ±2 MDM/ FS FS FS1-5 Cd 228. ±3 25 ±5 MDM/ FS FS FS25-5 Ni /- 1 ±2 MDM/ FS FS fs1-5 Co ±2 MDM/ FS FS FS1-5 Co 239. ±3 25 ±5 MDM/ FS FS FS25-5 HeCd ±2 MDM/ FS FS fs1-5 MDM= Metal-Dielectric-Metal 8 Andover Corporation Order online: Call toll-free in the US:

11 Standard Bandpass Filters Line cw/l (nm) fwhm (nm) Cavities/ Filter Type Min. T (%) N* Max. Thickness (mm) 12.5mm Ø 25mm Ø 5mm Ø Hg ±2 MDM/ FS FS FS1-5 Hg ±3 25 ±5 MDM/ FS FS FS25-5 Hg ±8 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS1-5 Hg /- 1 ±2 MDM/ FS FS FS1-5 Hg 265. ±3 25 ±5 MDM/ FS FS FS25-5 Hg /- 1 ±2 MDM/ FS FS FS1-5 Hg /- 1 ±2 MDM/ FS FS FS1-5 Hg 28. ±3 25 ±5 MDM/ FS FS FS25-5 Hg ±2 MDM/ FS FS FS1-5 Hg /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS1-25 3FS ±3 25 ±5 MDM/ FS FS FS /- 4 ±8 MDM/ FS FS4-25 3FS4-5 Questions? us at: techstaff@ Zn /- 1 ±2 MDM/7 andovercorp.com 15 - Section 4. 37FS FS FS1-5 Title Zn 37.1 ±3 25 ±5 MDM/ FS FS FS ±2 MDM/ FS FS FS1-5 Hg /- 1 ±2 MDM/ FS FS FS1-5 Hg 313. ±3 25 ±5 MDM/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Cd /- 3 ±.5 2/ FS FS FS3-5 Cd /- 1 ±2 3/ FS FS FS1-5 Cd ±3 25 ±5 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Hg /- 1 ±2 3/ FS FS FS1-5 N 2 Laser /- 3 ±.5 2/ FS FS FS3-5 N 2 Laser /- 1 ±2 3/ FS FS FS1-5 biomed /- 8 ±2 3/ FS FS FS8-5 biomed /- 1 ±2 3/ FS FS FS1-5 biomed 34. ±3 25 ±5 3/ FS FS FS25-5 Nd/YAG Laser /- 1 ±2 3/ FS FS FS ±3 25 ±5 3/ FS FS FS /- 4 ±8 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Hg /- 5 ±1 2/ FS FS FS5-5 Hg /- 1 ±2 3/ FS FS FS1-5 Hg 365. ±3 25 ±5 3/ FS FS FS25-5 Ni /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 4FS1-5 MDM= Metal-Dielectric-Metal Questions? techstaff@andovercorp.com Standard Bandpass Filters 9

12 Standard Bandpass Filters Line cw/l (nm) fwhm (nm) Cavities/ Filter Type Min. T (%) N* Max. Thickness (mm) 12.5mm Ø 25mm Ø 5mm Ø - 4. ±2 2 ±4 3/ FS FS2-25 4FS /- 4 ±8 3/ FS FS4-25 4FS /- 7 ±16 MDM/ FS FS7-25 4FS7-5 Hg /- 5 ±1 2/ FS FS FS5-5 Hg /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Hg /- 5 ±1 2/ FS FS FS5-5 Hg /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 He/Cd Laser /- 1 ±.2 2/ FS FS FS2-5 He/Cd Laser /- 3 ±.5 2/ FS FS FS3-5 He/Cd Laser /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS ±2 2 ±4 3/ FS FS FS /- 4 ±8 3/ FS FS FS /- 8 ±16 MDM/ FS FS FS8-5 Cs /- 1 ±2 3/ FS FS FS1-5 Ar/Ion Laser /- 1 ±.2 2/ FS FS FS2-5 Ar/Ion Laser /- 3 ±.5 2/ FS FS FS3-5 Ar/Ion Laser /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Hb /- 1 ±2 3/ FS FS FS1-5 Ar/Ion Laser /- 1 ±.2 2/ FS FS FS2-5 Ar/Ion Laser /- 3 ±.5 2/ FS FS FS3-5 Ar/Ion Laser /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 5FS ±2 2 ±4 3/ FS FS2-25 5FS /- 4 ±8 3/ FS FS4-25 5FS /- 8 ±16 MDM/ FS FS8-25 5FS8-5 Cd /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Ar/Ion Laser /- 1 ±.2 2/ FS FS FS2-5 Ar/Ion Laser /- 3 ±.5 2/ FS FS FS3-5 Ar/Ion Laser /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 MDM= Metal-Dielectric-Metal 1 Andover Corporation Order online: Call toll-free in the US:

13 Standard Bandpass Filters Line cw/l (nm) /- 1 ±2 3/ FS FS FS /- 1 ±2 3/3 Questions? us at: techstaff@ 7. 57FS FS FS1-5 andovercorp.com Section Hg /- 5 ±1 2/ Title 577FS FS FS5-5 MDM= Metal-Dielectric-Metal fwhm (nm) Cavities/ Filter Type Min. T (%) N* Max. Thickness (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 3/ FS FS FS1-5 Nd/YAG Laser /- 1 ±.2 2/ FS FS FS2-5 Nd/YAG Laser /- 3 ±.5 2/ FS FS FS3-5 Nd/YAG Laser /- 1 ±2 3/ FS FS FS1-5 Ti /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Hg /- 5 ±1 2/ FS FS FS5-5 Zn /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS ±2 2 ±4 3/ FS FS FS /- 4 ±8 3/ FS FS FS /- 8 ±16 MDM/ FS FS FS8-5 Hg /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Na /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 2/ FS FS1-25 6FS ±2 2 ±4 2/ FS FS2-25 6FS /- 4 ±8 3/ FS FS4-25 6FS /- 8 ±16 MDM/ FS FS8-25 6FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 HeNe Laser /- 1 ±.2 2/ FS FS FS2-5 HeNe Laser /- 3 ±.5 2/ FS FS FS3-5 HeNe Laser /- 1 ±2 3/ FS FS FS1-5 Zn /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Kr Laser /- 1 ±.2 2/ FS FS FS2-5 Kr Laser /- 3 ±.5 2/ FS FS FS3-5 Kr Laser /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS ±2 2 ±4 3/ FS FS FS /- 4 ±8 3/ FS FS FS /- 8 ±16 MDM/ FS FS FS8-5 Ha /- 1 ±.2 2/ FS FS FS2-5 Ha /- 3 ±.5 2/ FS FS FS3-5 Ha /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Questions? techstaff@andovercorp.com Standard Bandpass Filters 11

14 Standard Bandpass Filters Line cw/l (nm) fwhm (nm) Cavities/ Filter Type Min. T (%) N* Max. Thickness (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 3/ FS FS FS1-5 Li /- 1 ±2 3/ FS FS FS1-5 Laser Diode 675. ±2 2 ±4 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Ruby Laser /- 1 ±.2 2/ FS FS FS2-5 Ruby Laser /- 3 ±.5 2/ FS FS FS3-5 Ruby Laser /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 7FS ±2 2 ±4 3/ FS FS2-25 7FS /- 4 ±8 3/ FS FS4-25 7FS /- 8 ±16 MDM/ FS FS8-25 7FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS ±2 2 ±4 3/ FS FS FS /- 4 ±8 3/ FS FS FS /- 1 ±2 MDM/ FS FS-25 75FS /- 1 ±2 3/ FS FS FS1-5 K /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Rb /- 1 ±2 3/ FS FS FS1-5 Laser Diode 78. ±2 2 ±4 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 Rb /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 8FS ±2 2 ±4 3/ FS FS2-25 8FS /- 4 ±8 3/ FS FS4-25 8FS /- 1 ±2 MDM/ FS FS-25 8FS-5 Laser Diode /- 1 ±2 3/ FS FS FS1-5 Laser Diode 81. ±2 2 ±4 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 GaAlAs Laser /- 1 ±2 3/ FS FS FS1-5 Laser Diode 83. ±2 2 ±4 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS ±2 2 ±4 3/ FS FS FS /- 4 ±8 3/ FS FS FS /- 1 ±2 MDM/ FS FS-25 85FS /- 1 ±2 3/ FS FS FS /- MDM= Metal-Dielectric-Metal 1 ±2 3/ FS FS FS1-5 MDM= Metal-Dielectric-Metal 12 Andover Corporation Order online: Call toll-free in the US:

15 Standard Bandpass Filters Line cw/l (nm) /- 1 ±2 3/ FS FS FS1-5 Questions? us at: techstaff@ ±2 2 ±4 3/3 andovercorp.com Section 7. 95FS FS FS2-5 Title /- 4 ±8 3/ FS FS FS4-5 MDM= Metal-Dielectric-Metal fwhm (nm) Cavities/ Filter Type Min. T (%) N* Max. Thickness (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 9FS ±2 2 ±4 3/ FS FS2-25 9FS /- 4 ±8 3/ FS FS4-25 9FS /- 1 ±2 MDM/ FS FS-25 9FS-5 GaAs /- 1 ±.2 2/ FS FS FS2-5 GaAs /- 3 ±.5 2/ FS FS FS3-5 GaAs /- 1 ±.2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 MDM/ FS FS-25 95FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 1FS ±2 2 ±4 3/ FS FS2-25 1FS /- 4 ±8 3/ FS FS4-25 1FS /- 1 ±2 MDM/ FS FS-25 1FS-5 Hg /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 5FS1-5 Nd Laser /- 1 ±.2 2/ FS FS FS2-5 Nd/YAG /- 3 ±.5 2/ FS FS FS3-5 Nd/YAG /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS ±3 2 ±5 3/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS ±3 2 ±5 3/ FS FS FS /- 1 ±2 2/ FS FS FS ±3 2 ±5 3/ FS FS FS2-5 Questions? techstaff@andovercorp.com Standard Bandpass Filters 13

16 Standard Bandpass Sets Andover s standard bandpass filter sets cover the spectral region from the ultraviolet to the near infrared. Each set, including complete spectral data, is shipped in a convenient storage case. Ultraviolet Filter Set Includes nine filters and is available in three sizes. Excellent choice for isolating specific spectral lines. size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS1-25 3FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 MDM= Metal-Dielectric-Metal 9-Piece Ultraviolet Set 16FA FA FA Andover Corporation Order online: Call toll-free in the US:

17 Mercury Line Filter Sets With their sharp cut-on and cut-off slopes, plus high degree of out-of-band blocking, these sets are useful for eliminating unwanted background radiation. size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 8-Piece Mercury Ultraviolet Set 1FA FA1-25 1FA1-5 size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 5 ±1 2/ FS FS FS /- 5 ±1 2/ FS FS FS /- 1 ±2 3/ FS FS FS /- 5 ±1 2/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 5-Piece Mercury Visible/Near Infrared Set 12FA FA FA1-5 size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 MDM= Metal-Dielectric-Metal 13-Piece Mercury Ultraviolet/Visible/Near Infrared Set 14FA FA FA1-5 Questions? techstaff@andovercorp.com Standard Bandpass Filter Sets 15

18 Visible Filter Sets Consists of three options in different bandwidths. size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø 4. +3/- 1 ±2 3/ FS FS1-25 4FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 5FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 6FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 7FS Piece Visible (1nm Bandwidth) Set 18FA FA FA1-5 size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø 4. +1/- 4 ±8 3/ FS FS4-25 4FS /- 4 ±8 3/ FS FS FS /- 4 ±8 3/ FS FS4-25 5FS /- 4 ±8 3/ FS FS FS /- 4 ±8 3/ FS FS4-25 6FS /- 4 ±8 3/ FS FS FS /- 4 ±8 3/ FS FS4-25 7FS4-5 7-Piece Visible (4nm Bandwith) Set 11FA FA FA4-5 size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 7 ±16 MDM/ FS FS7-25 4FS /- 8 ±16 MDM/ FS FS FS /- 8 ±16 MDM/ FS FS8-25 5FS /- 8 ±16 MDM/ FS FS FS /- 8 ±16 MDM/ FS FS8-25 6FS /- 8 ±16 MDM/ FS FS FS /- 8 ±16 MDM/ FS FS8-25 7FS8-5 MDM= Metal-Dielectric-Metal 7-Piece Visible (8nm Bandwidth) Set 112FA FA FA Andover Corporation Order online: Call toll-free in the US:

19 Near Infrared Filter Sets Includes three options in different bandwidths. Useful for isolating specific lines or bands over a much broader and higher wavelength region. size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 8FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 9FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS1-25 1FS /- 1 ±2 3/ FS FS1-25 5FS /- 1 ±2 3/ FS FS FS /- 1 ±2 3/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS /- 1 ±2 2/ FS FS FS ±3 2 ±5 3/ FS FS FS Piece Near Infrared (1nm Bandwidth) Set 114FA FA FA1-5 size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 4 ±8 3/ FS FS FS /- 4 ±8 3/ FS FS4-25 8FS /- 4 ±8 3/ FS FS FS /- 4 ±8 3/ FS FS4-25 9FS /- 4 ±8 3/ FS FS FS /- 4 ±8 3/ FS FS4-25 1FS4-5 6-Piece Near Infrared (4nm Bandwidth) Set 116FA FA FA4-5 size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 MDM/ FS FS-25 75FS /- 1 ±2 MDM/ FS FS-25 8FS /- 1 ±2 MDM/ FS FS-25 85FS /- 1 ±2 MDM/ FS FS-25 9FS /- 1 ±2 MDM/ FS FS-25 95FS /- 1 ±2 MDM/ FS FS-25 1FS-5 6-Piece Near Infrared (1nm Bandwidth) Set 118FA FA FA-5 MDM= Metal-Dielectric-Metal Questions? techstaff@andovercorp.com Standard Bandpass Filter Sets 17

20 Zinc and Cadmium Filter Sets Available in four wavelengths and two half bandwidths. A good tool for liquid chromatography work, particularly fixed wavelength detectors. size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø /- 1 ±2 MDM/ FS FS FS ±2 MDM/ FS FS FS /- 1 ±2 MDM/ FS FS FS /- 1 ±2 3/ FS FS FS1-5 4-Piece Zinc and Cadmium (1nm Bandwidth) Set 17FA FA FA1-5 size, Shape & Part Number max. CW/L FWHM Cavities/ Min. t Thickness (nm) (nm) Filter Type (%) N* (mm) 12.5mm Ø 25mm Ø 5mm Ø 214. ±3 22 ±4 MDM/ FS FS FS ±3 25 ±5 MDM/ FS FS FS ±3 25 ±5 MDM/ FS FS FS ±3 25 ±5 3/ FS FS FS25-5 MDM= Metal-Dielectric-Metal 4-Piece Zinc and Cadmium (22/25nm Bandwidth) Set 17FA FA FA23-5 User-Defined Standard Sets In addition to an extensive line of standard sets, Andover Corporation also offers customers the opportunity to build their own filter sets from across our product listings whether bandpass, neutral density, dichroic, edge, or other filter category. The only restriction is that the filters must be the same size. Take your choice of six-, eight-, and twelve-piece sets in one of three standard sizes. All filter sets include complete spectral curve data and are shipped with a hardwood storage case. 12.5mm Ø 25mm Ø 5mm Ø With this special offer, you automatically save 5% on a 6-piece set 8% on a 8-piece set 1% on a 12-piece set 6-Piece Set FS FS6-25 FS6-5 8-Piece Set FS FS8-25 FS Piece Set FS FS12-25 FS Andover Corporation Order online: Call toll-free in the US:

21 Semi- custom Bandpass Wavelengths from the ultraviolet through infrared Bandwidths from.15nm to 8nm Delivery within 1 days of order S e e p a g e 8 f o r g e n e r a l specifications Thanks to a large inventory of components, Andover Corporation can fabricate and deliver higher-performance commercial quality bandpass filters to your specifications within 5-1 days from receipt of order. To specify your semi-custom filter, all you have to do is follow three quick steps. 1. Select the desired bandwidth, filter type, and center wavelength from the range listed. 2. Select the blocking range. 3. Select the size and corresponding part number. All other features are predetermined by these three choices. The outof-band blocking of these filters is 1-4 within the defined spectral range. Optional threaded rings available. Image quality versions available, please call for pricing and delivery. Select 1. Select 2. Select 3. Bandwidth CW/L CW/L Min. T (%) (FWHM) Cavities/ Range Tolerance When Blocked to (nm) Filter Type (nm) (%) 1µ FIR N* 12.5mm Ø 25mm Ø 5mm Ø.15 ±.5 1/ / FC FC1-25 1FC / / FC FC FC ±.5 1/ / / 2.5 2FC FC1-25 2FC / / FC FC FC ±.1 2/ / FC FC1-25 3FC / / FC FC FC to.4 3/ / FC FC FC ±.1 2/ / / 2.5 5FC FC1-25 5FC / / FC FC FC ±.1 2/ ± FC FC8-25 6FC / ± FC FC1-25 6FC / ± FC FC FC to.8 3/ ± FC FC1-25 7FC / ± FC FC FC / ± FC FC FC ±.2 2/ / FC FC8-25 8FC / / FC FC1-25 8FC / / FC FC FC / / FC FC FC / / FC FC FC16-5 Questions? techstaff@andovercorp.com Semi-Custom Bandpass Filters 19

22 Semi-custom Bandpass Filters Select 1. Select 2. Select 3. Bandwidth CW/L CW/L Min. T (%) (FWHM) Cavities/ Range Tolerance When Blocked to (nm) Filter Type (nm) (%) 1µ FIR N* 12.5mm Ø 25mm Ø 5mm Ø 1. ±.2 2/ / FC FC4-25 1FC / / FC FC6-25 1FC / / / 2.5 1FC FC8-25 1FC / / FC FC1-25 1FC / / FC FC FC / / FC FC FC / / FC FC FC ±.2 3/ / / 2.5 1FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC ±.3 2/ / FC FC FC / / FC FC FC / / FC FC FC / / / FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC ±.5 2/ / FC FC2-25 2FC / / FC FC4-25 2FC / / FC FC6-25 2FC / / / 2.5 2FC FC8-25 2FC / / FC FC1-25 2FC / / FC FC FC / / FC FC FC / / FC FC FC ±.5 3/ / / 2.5 2FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC ±.5 2/ / FC FC2-25 3FC / / FC FC4-25 3FC / / FC FC6-25 3FC / / / 2.5 3FC FC8-25 3FC / / FC FC1-25 3FC / / FC FC FC / / FC FC FC / / FC FC FC Andover Corporation Order online: Call toll-free in the US:

23 Semi-custom Bandpass Filters Select 1. Select 2. Select 3. Bandwidth CW/L CW/L Min. T (%) (FWHM) Cavities/ Range Tolerance When Blocked to (nm) Filter Type (nm) (%) 1µ FIR N* 12.5mm Ø 25mm Ø 5mm Ø 3. ±.5 3/ / / 2.5 3FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC ± 1. 2/ / FC FC2-25 5FC / / FC FC4-25 5FC / / / 2.5 5FC FC6-25 5FC / / FC FC1-25 5FC / / FC FC FC / /- 6 a FC FC FC / /- 65 b FC FC FC / /- 55 c FC FC FC / /- 5 c FC FC FC / /- 5 c FC FC2-25 5FC ± 1. 3/ / FC FC FC / / FC FC FC / / / 2.5 5FC FC FC / / FC FC FC / / FC FC FC / /- 55 b FC FC FC / /- 5 c FC FC FC ± 1. 4/ / / 2.5 5FC FC FC / / FC FC FC / / FC FC FC / / FC FC FC ± 2. MDM/ / FC FC-25 1FC-5.. MDM/ / FC FC2-25 1FC / / FC FC FC / / FC FC FC / / / 2.5 1FC FC FC / / FC FC FC / / FC FC FC / /- 7 a FC FC FC / /- 7 b FC FC FC / /- 7 c FC FC FC / /- 7 d FC FC4-25 1FC / /- 6 e FC FC FC41-5 a= Blocking to 12nm b= Blocking to 13nm c= Blocking to 155nm d= Blocking to 24nm e= Blocking to 32nm Questions? techstaff@andovercorp.com Semi-Custom Bandpass Filters 21

24 Semi-custom Bandpass Filters Select 1. Select 2. Select 3. Bandwidth CW/L CW/L Min. T (%) (FWHM) Cavities/ Range Tolerance When Blocked to (nm) Filter Type (nm) (%) 1µ FIR N* 12.5mm Ø 25mm Ø 5mm Ø 1. ± 2. 4/ / / 2.5 1FC FC FC / / FC FC FC / /- 7 a FC FC FC / /- 7 b FC FC FC / /- 7 c FC FC FC ± 4. MDM/ ± FC FC-25 2FC-5.. MDM/ ± FC FC2-25 2FC / ± FC FC FC ± 4. 3/ ± FC FC FC / ± FC FC FC / ± / 2.5 2FC FC FC / ±2. 7 a FC FC FC / ±2. 7 b FC FC FC / ±2. 7 c FC FC FC / ±2. 7 d FC FC4-25 2FC / ±2. 6 e FC FC FC ± 4. 4/ ± FC FC FC / ± / 2.5 2FC FC FC / ±2. 7 a FC FC FC / ±2. 7 b FC FC FC ± 1. MDM/ ± FC FC-25 4FC-5.. MDM/ ± FC FC2-25 4FC / ± FC FC FC ± 1. 5/ ± FC FC FC / ± FC FC FC / ± FC FC FC / ±5. 75 a FC FC FC / ±5. 75 b FC FC FC / ±5. 7 c FC FC FC / ±5. 7 d FC FC4-25 5FC / ±5. 7 e FC FC FC ± 1. 5/ ± FC FC FC ± 2. 5/ ± FC FC FC / ±1. 75 a FC FC FC / ±1. 7 b FC FC FC / ±1. 7 c FC FC FC / ±1. 7 d FC FC5-25 8FC / ±1. 7 e FC FC FC51-5 a= Blocking to 12nm b= Blocking to 13nm c= Blocking to 155nm d= Blocking to 24nm e= Blocking to 32nm 22 Andover Corporation Order online: Call toll-free in the US:

25 Temperature Controllers Provides added control over ambient tem peratures Effective for conducting outdoor experiments Custom sizes and temperature ranges also available Controlling the ambient temperature when using a narrow bandpass filter is critical for top performance. For installations that are subject to large temperature fluctuations, Andover has developed a filter oven to maintain a constant temperature above ambient temperature. This precise control also provides an effective means of tuning the center wavelength to an exact value. All of our filter ovens come with a universal oven controller, which will operate from 11 to 22 volts, 5 6 Hz, and include plugs for US, UK, Australia, and Europe. Shipped in a sturdy, reusable weatherproof case. GENERAL SPECIFICATIONS Stability Test (2 cycles shown) Regulation Accuracy Ambient Temperature Range +/-.25 C 3 C Min. Regulated Temperature 3 C Max. Regulated Temperature 6 C Power Requirements Cable Length 3' 11 22VAC. 5-6Hz, 1.A Filter Ovens Filter oven windows have broadband antireflective coating for a maximum average reflectance of less than or equal to.5% per surface over their specified wavelength range. The substrate material is either Schott BK-7 or fused silica, as appropriate. All substrates are flat to λ/4 minimum and parallel to 3 arc seconds or better. Temperature C : 6: 9: 12: 15: 18: 21: Elapsed Time (hours) A/R Coating W/L Range 3nm to 45nm 45nm to 7nm 7nm to 11nm Part Number 11FRDC1-5 11FRDC2-5 11FRDC3-5 Filter Oven Controllers Filter Oven Controller Part Number Oven Controller 11FRDC-CTRL Questions? techstaff@andovercorp.com Temperature Controllers 23

26 Custom Capabilities Fully automated systems for excellent repeatability and rapid turnaround Continuously updated manufacturing processes Products that far exceed industry standards for quality While stocking over 1, standard filters, Andover Corporation has built a worldwide reputation f o r developing custom, often state-of-the-art 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 highest-quality product, attentive service, and timely delivery. Fabrication Optical Polishing Specialized Coatings Whether you need a filter that s 8mm or 35mm, Andover has fully automated CNC equipment to fabricate exactly what you want, at the quality you want, and using the optical material of your choice. Andover s in-house polishing facility can achieve flatness up to λ/1 wave per inch and parallelism of 1 arc seconds or better, with a surface quality of 4/2. With our computer-controlled systems, we can quickly produce a variety of high-quality coatings in sizes up to 35mm with excellent repeatability using any process form thermal evaporation to magnetron sputtering. 24 Andover Corporation Order online: Call toll-free in the US:

27 Total Quality Control To ensure total quality control, most of our equipment is either custom designed or custom constructed to our exacting specifications. State-of-the-Art. Testing Andover Corporation tests start at the raw material and continue through the finished product. Most interferometers rely on laser light to produce interference fringes. Since they do not transmit the laser wavelength, many bandpass filters cannot be measured with these instruments. To solve this problem, we have constructed a computerized, tunable white light interferometer that produces actual transmitted wavefront interferograms of filters from 35nm 11nm. Our on-site environmental chamber allows us to perform routine and custom product testing at various temperatures and humidity levels to ensure compliance to your custom specifications or MIL standards. Questions? techstaff@andovercorp.com Custom Capabilities 25

28 Image Quality. Filters Astronomical observations, video monitoring systems, highresolution photography, and other imaging applications require components of the highest optical quality. To meet these demanding requirements, Andover Corporation has developed a line of custom image quality filters using high-grade optical material that is both striation and inclusion-free. The surfaces are ground and polished to a transmitted wavefront of λ/4 per inch and parallel to 3 arc seconds or better. The internal coating positions are optimized and the exterior surfaces antireflection coated to eliminate multiple images and fringe patterns. For very high-resolution applications, we can also provide image quality filters with a transmitted wavefront of λ/1 and parallelism of 1 arc seconds. All filters come with test documentation For quality custom products, please call (US) or (Outside US) Antireflective Coatings Thin-film 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. Image quality filters are ideal for applications that require high resolution, such as astronomical observations. To make these products, we fabricate high-quality 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 can have the same spectral characteristics as image quality filters, but they are designed for use in instruments rather than imaging applications. % Reflectance Broadband visible Antireflection Uncoated Coated Wavelength (nm) 26 Andover Corporation Order online: Call toll-free in the US:

29 Past Projects A small sampling of Andover's past projects: Solar Diameter Imager and Surface Mapper (SODISM) on the PICARD satellite PICARD is an investigation dedicated to the simultaneous measurement of the absolute total and spectral solar irradiance, the diameter and solar shape, and to the Sun's interior probing by the helioseismology method. These measurements obtained all along the mission will allow the study of their variations as a function of the solar activity. 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. MErcury Surface, Space ENvironment, GEochemistry and Ranging (MESSENGER) MESSENGER launched on August 3, 24. 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 fields-of-view, for monochrome, color and stereo imaging. The Cross-track Infrared Sounder (CrIS) CrIS is a Michelson interferometer infrared sounder that is part of the Cross-track 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. 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. Questions? techstaff@andovercorp.com Custom Capabilities 27

30 Astronomy filters Options for professionals and amateurs alike Ideal for photometric calibration UBVRI Filters Andover Corporation now 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/Bessell type is better suited for use with a photomultiplier tube, while the Kron/Cousins type is better suited for use with a Silicon CCD. GENERAL SPECIFICATIONS Size Tolerance Glass Thickness Bevels Coating Durability Construction +/-.25mm 5.mm +/-.1mm Break all sharp edges Per MIL-C-48497A moderate abrasion Schott glass substrates (ground and polished). laminated with index-matching epoxy Optical Specifications Transmitted Wavefront Parallelism Surface Quality Optical Quality 1 wave or better per 25mm 3 arc seconds or better 6/4 or better per MIL-C-675 Image Quality AR Coatings Exterior surfaces (appropriate to the. filter passband) Johnson/Bessel Filter Specifications U B V R I Nominal CW/L 365nm 44nm 55nm 63nm 9nm Nominal FWHM 6nm 1nm 9nm 12nm 3nm Nominal Transmission > 5% > 55% > 7% > 7% > 7% Kron/Cousins Filter Specifications U B V R I Nominal CW/L 365nm 44nm 55nm 76nm 8nm Nominal FWHM 6nm 1nm 9nm 25nm 15nm Nominal Transmission > 5% > 55% > 7% > 7% > 7% 28 Andover Corporation Order online: Call toll-free in the US:

31 Johnson/bessel ubvri filters 1 V 8 U B R % Transmittance I Ultraviolet Blue Visible Red Infrared Wavelength (nm) Part Number & Type Size & Shape u b v r i 5-Piece Set 25mm Ø JOHN-U-25 JOHN-B-25 JOHN-V-25 JOHN-R-25 JOHN-I-25 JOHN-FA-25 5mm Ø JOHN-U-5 JOHN-B-5 JOHN-V-5 JOHN-R-5 JOHN-I-5 JOHN-FA-5 5 x 5mm SQ JOHN-U-5S JOHN-B-5S JOHN-V-5S JOHN-R-5S JOHN-I-5S JOHN-FA-5S 31mm Ø (Mounted) JOHN-U-31M JOHN-B-31M JOHN-V-31M JOHN-R-31M JOHN-I-31M JOHN-FA-31M 5mm Ø (Mounted) JOHN-U-5M JOHN-B-5M JOHN-V-5M JOHN-R-5M JOHN-I-5M JOHN-FA-5M KRON/COUSINS ubvri filters 1 V R I 8 U B % Transmittance Ultraviolet Blue Visible Red Infrared Wavelength (nm) Part Number & Type Size & Shape u b v r i 5-Piece Set 25mm Ø KRON-U-25 KRON-B-25 KRON-V-25 KRON-R-25 KRON-I-25 KRON-FA-25 5mm Ø KRON-U-5 KRON-B-5 KRON-V-5 KRON-R-5 KRON-I-5 KRON-FA-5 5 x 5mm SQ KRON-U-5S KRON-B-5S KRON-V-5S KRON-R-5S KRON-I-5S KRON-FA-5S 31mm Ø (Mounted) KRON-U-31M KRON-B-31M KRON-V-31M KRON-R-31M KRON-I-31M KRON-FA-31M 5mm Ø (Mounted) KRON-U-5M KRON-B-5M KRON-V-5M KRON-R-5M KRON-I-5M KRON-FA-5M Questions? techstaff@andovercorp.com Astronomy Filters 29

32 Astronomy filters Nebula Filters A true nebula filter works by blocking out the sky glow (artificial light pollution) and enhancing deep-sky objects. Andover manufactures two types of filters that are considered best for viewing emission nebulae (created when a star is born) and planetary nebulae (created when a star is dying). Options for professionals and amateurs alike Ideal for eliminating light pollution Physical Specifications 31mm Ø 5mm Ø Mounting Threaded eyepiece Threaded ring Construction Laminated filter Laminated filter Outside Diameter 31.mm +/-.12mm 5.mm +/-.12mm Clear Aperture 24.1mm diameter 45mm diameter Thickness 1.mm +/-.5mm 8.2mm +/-.5mm Thread Size 1-1/8 4 M48.75 Optical Specifications Transmitted Wavefront Parallelism Surface Quality AR Coatings Durability 3-5 waves per 25mm 1 arc minute or better 8/5 or better per MIL-C-675 BBAR on all exterior surfaces Per MIL-C-48497A, moderate abrasion 31mm Ø 5mm Ø Three-Channel Nebula-NB-31 Nebula-NB-5 O-III Oxygen-III-31 Oxygen-III-5 Blue Nebula Blue-Nebula-31 Blue-Nebula-5 3 Andover Corporation Order online: Call toll-free in the US:

33 THree-CHANNEL NEBULA FILTER Suitable for vewing both types of nebulae, the Andover threechannel nebula filter is unique in its ability to block the sky glow and enhance the nebulae, as well as let through a selected band of blue light that improves the viewing of star clusters. This filter also transmits the hydrogen-alpha line, which is very important for photographing emission nebulae. % Transmittance Wavelength (nm) o-iii NEBULA FILTER Featuring a narrower bandpass than the three-channel version, the O-III nebula filter blocks out much of the sky glow and isolates the two O-III lines centered at 496.9nm and 5.7nm. This filter significantly increases contrast, making it well-suited for viewing planetary nebulae. % Transmittance Wavelength (nm) BLUE NEBULA FILTER Similar to the three-channel nebula filter, the blue nebula has greater transmission in the blue region, creating a more naturallooking view while retaining good contrast. The hard, first-surface coating renders this filter virtually indestructible. % Transmittance Wavelength (nm) Questions? techstaff@andovercorp.com Astronomy Filters 31

34 Neutral Densit y Filters Provides attenuation with greater linearity over a wide spectral range Reduces thermal effects i n l o w - p o w e r l a s e r applications Delivers superior durability Soda lime glass, fused silica, and custom substrates available Metallic Coated Metallic-coated neutral density (ND) filters obtain their optical density from a metal alloy coating on a substrate determined by the wavelength region of interest. Unlike the all-dielectric 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 energy than the absorptive type, metallic ND filters are suitable only for low-power applications. (Note: If used in series, these filters should be tilted to avoid multiple reflections and any reduction of density.) GENERAL SPECIFICAtions Thickness Dimensional Tolerances Clear Aperture Surface Quality Coating Adherence Humidity Max. Operating Temperature Substrate Materials Optical Quality 1.5 ±.5mm +/-.2mm 9% of outside dimension 6/4 per MIL--1383B Per MIL-M-1358C Per MIL-STD-81F +1 C Glass (35 2nm region) or fused silica (25 2nm region) Glass: Flatness of 3 5 waves per inch and parallelism of 3 arc minutes or better Fused Silica: Flatness of λ/4 per inch and parallelism of 3 arc seonds or better Applications Machine Vision and Other Imaging Applications Scientific Measurements and Research Low-Power Lasers Calibration Attenuation Metallic Neutral Density Specifications Optical Nominal Transmission Deviation From Nominal (%) Density transmittance (%) 25 35nm 35 8nm 8 2nm ±8. ±2. ± ±7. ±2. ± ±6. ±2. ± ±5. ±2. ± ±4. ±1.5 ± ±4. ±1.5 ± ±4. ±1.5 ± ±4. ±1.5 ± ±4. ±1.5 ± ±3.5 ±1. ± ±3.5 ±1. ± ±3. ±1. ± ±1.5 ±.5 ± ±.5 ±.2 ± ±.15 ±.7 ± ±.6 ±.4.1 (nominal) 4..1 ±.8 ±.1/-.8.1 (nominal) 32 Andover Corporation Order online: Call toll-free in the US:

35 visible/near infrared region (Glass Substrate, 35 2nm) size, Shape & Part Number Optical nominal Density Transmittance (%) 12.5mm Ø 25mm Ø 5mm Ø 5mm SQ FN FN FN52-5 1FN52-5S FN FN FN FN52-5S FN FN FN52-5 2FN52-5S FN FN FN52-5 3FN52-5S FN FN FN52-5 4FN52-5S FN FN FN52-5 5FN52-5S FN FN FN52-5 6FN52-5S FN FN FN52-5 7FN52-5S FN FN FN52-5 8FN52-5S FN FN FN52-5 9FN52-5S FN FN FN52-5 1FN52-5S FN FN FN FN52-5S FN FN FN FN52-5S FN FN FN52-5 2FN52-5S FN FN FN FN52-5S FN FN FN52-5 3FN52-5S FN FN FN52-5 4FN52-5S Ultraviolet/visible/near Infrared REgion (Fused Silica, 25 2nm) size, Shape & Part Number Optical nominal Density Transmittance (%) 12.5mm Ø 25mm Ø 5mm Ø 5mm SQ FN FN FN46-5 1FN46-5S FN FN FN FN46-5S FN FN FN46-5 2FN46-5S FN FN FN46-5 3FN46-5S FN FN FN46-5 4FN46-5S FN FN FN46-5 5FN46-5S FN FN FN46-5 6FN46-5S FN FN FN46-5 7FN46-5S FN FN FN46-5 8FN46-5S FN FN FN46-5 9FN46-5S FN FN FN46-5 1FN46-5S FN FN FN FN46-5S FN FN FN FN46-5S FN FN FN46-5 2FN46-5S FN FN FN FN46-5S FN FN FN46-5 3FN46-5S FN FN FN46-5 4FN46-5S Questions? Neutral Density Filters 33

36 Neutral Densit y Filters Optical density tolerance.5% from 4nm to 7nm Sets provide a uniform series of filters for adjusting illumination Custom substrate materials and dimensions available Absorptive With their ability to minimize back-reflections and scattered light, absorptive neutral density (ND) filters are ideal for calibration. In contrast to the metallic type, absorption-type filters achieve their optical density by absorbing light within the substrate. For this reason, thickness is a key determinant of opacity. Because of their absorbing quality, these filters are suitable for low-power applications only. GENERAL SPECIFICATIONS Thickness Dimensional Tolerances Clear Aperture Surface Quality Max. Operating Temperature Substrate Material Spectral Range Optical Quality 5.mm (maximum) ±.5mm 9% of diameter 6/4 per MIL--1383B +1 C Schott absorption glass 4 7nm Flatness of λ/4 per inch and parallelism of 3 arc seconds or better Applications Photomicrography Machine Vision Scientific Measurements and Research Photography Optical Density Tolerance Nominal 55 nm (%) Transmission (%) Thickness (mm) 25mm Ø 5mm SQ.1 ± ABND-25 1ABND-5S.2 ± ABND-25 2ABND-5S.3 ± ABND-25 3ABND-5S.4 ± ABND-25 4ABND-5S.5 ± ABND-25 5ABND-5S.6 ± ABND-25 6ABND-5S.7 ± ABND-25 7ABND-5S.8 ± ABND-25 8ABND-5S.9 ± ABND-25 9ABND-5S 1. ± ABND-25 1ABND-5S 1.5 ± ABND-25 15ABND-5S 2. ± ABND-25 2ABND-5S 3. ± ABND-25 3ABND-5S 4. ± ABND-25 4ABND-5S 34 Andover Corporation Order online: Call toll-free in the US:

37 Neutral Densit y Sets All Andover sets are shipped with a hardwood storage case for protection and convenient storage. Metallic-coated Sets Andover s metallic-coated neutral density filter sets feature both round and square filters in your choice of four sizes and two substrates. 7-Piece Set Includes seven filters with optical densities ranging from.1 to 4., in your choice of four sizes and either glass or fused silica substrates. Substrate 12.5mmØ 25mm Ø 5mm Ø 5mm SQ Glass 128FA FA FA FA52-5S Fused Silica 13FA FA FA FA46-5S 17-Piece Set Includes 17 filters with optical densities ranging from.1 to 4., in your choice of four sizes and either glass or fused silica substrates. Substrate 12.5mmØ 25mm Ø 5mm Ø 5mm SQ Glass 132FA FA FA FA52-5S Fused Silica 134FA FA FA FA46-5S Absorptive Sets Andover s absorptive neutral density filter sets provide a choice of either round and square filters. 7-Piece Set Includes seven filters with optical densities ranging from.1 to mm Ø 135FAND-25 5mm SQ 135FAND-5S 14-Piece Set Includes 14 filters with optical densities ranging.1 to mm Ø 135FAND FAND-25 5mm SQ 135FAND-5S 136FAND-5S Questions? techstaff@andovercorp.com Neutral Density Filter Sets 35

38 Heat Control Filters Cold mirrors transmit near-ir and reflect visible light Hot mirrors reflect near-ir and transmit visible light Together, they effectively cool high-power illumination systems A combination of hot and cold mirrors can essentially eliminate 99% of the radiation generated by high-power illumination systems. The cold mirror, mounted at a 45 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 Size Tolerance Thickness Min. Clear Aperture Substrate Material Flatness Parallelism Surface Quality Humidity and Abrasion +.mm/-.5mm 3.mm ±.5mm. (6.mm ±.5mm for IR Suppressing) 95% of optical dimension Borosilicate glass 5 1 waves per 25mm 3 arc minutes or better 8/5 per MIL-O-1383 Per MIL-C-675A Max. Operating Temperature +2 C. (+1 C for IR suppressing) Applications Projection Systems Photocopiers Surgical and Dental Lighting Film and Photographic Apparatus Illumination Systems Scientific Instruments Hot Mirrors Hot mirrors are heat-reflecting filters designed to transmit visible wavelengths and reflect near-infrared heat-generating wavelengths. Andover s hot mirrors have hard, first-surface dielectric coatings that meet or exceed the humidity and abrasion specifications listed above. The coatings are deposited onto a low-expansion material such as borosilicate glass to prevent cracking or crazing from high heat applications. 25mm Ø 5mm Ø 5mm SQ % Transmittance ( Angle) Wavelength (nm) Average Transmittance: 45nm 675nm 85% Average Reflection: 75nm 12nm 9% 775FW FW FW82-5S 36 Andover Corporation Order online: Call toll-free in the US:

39 Cold Mirrors Cold mirrors are heat-transmitting filters designed to reflect visible wavelengths and transmit nearinfrared wavelengths. Andover s cold mirrors have first-surface coatings that are deposited onto a lowexpansion material such as borosilicate glass. 25mm Ø 5mm Ø 5mm SQ 645FK FK FK84-5S % Transmittance (45 Angle) Wavelength (nm) Average Transmittance 8nm 12nm 85% Average Reflection 45nm 65nm 9% 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. 25mm Ø 5mm Ø 5mm SQ 375FV FV FV86-5S % Transmittance (45 Angle) Wavelength (nm) Average Transmittance: 6nm 12nm 85% Average Reflection: 325nm 475nm 95% 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 low-power applications with a maximum filter temperature of 1 C. 25mm Ø 5mm Ø 5mm SQ 8FB FB72-5 8FB72-5S % Transmittance ( Angle) Wavelength (nm) Average Transmittance: 4nm 6nm 65% Average Transmittance: 7nm 2nm 1% Questions? techstaff@andovercorp.com Heat Control Filters 37

40 Dichroic filters Provide sharp separation between transmission and reflection Spectrally stable at changing temperatures and humidity Available in custom designs, colors, angles of incidence, substrates, dimensions, and coatings Far more durable than dyed plastic or gel-coated 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 high-energy 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 energy into two or more light beams. GENERAL SPECIFICATIONS Size Tolerance Thickness Min. Clear Aperture Substrate Material Flatness Parallelism Surface Quality Humidity and Abrasion Max. Operating Temperature +.mm/-.25mm 1.mm ±.25mm 95% of outside dimension Soda lime glass 3 5 waves per 25mm 3 arc minutes or better 8/5 per MIL-C-48497A Per MIL-C-48497A +2 C Note: While the spectral curves are shown at normal incidence, many applications such as combining colors may require the reflecting mode at a 45 degree of incidence. Applications Fluorescence Microscopy UV-VIS Irradiation Camera Imaging Stage Lighting Architectural Lighting Projection Displays Color Enlargers Photocopiers Color type 25mm Ø 5mm Ø 5mm SQ Yellow Subtractive 52FD FD FD22-5S Magenta Subtractive 55FD FD FD26-5S Cyan Subtractive 59FD FD FD24-5S Blue Additive 55FD FD FD64-5S Green Additive 54FD FD FD66-5S Red Additive 585FD FD FD62-5S Blue Reflective 475FD FD FD68-5S Red Reflective 58FD FD7-5 58FD7-5S 38 Andover Corporation Order online: Call toll-free in the US:

41 Yellow subtractive Filter ( Angle) 1 Blue Additive Filter ( Angle) 1 % Transmittance % Transmittance Wavelength (nm) R: 99% Average 41nm 475nm 5% Cut-on 52nm (nominal) T: 85% Average 55nm 75nm Wavelength (nm) R: 99% Average 54nm 75nm 5% Point 55nm (nominal) T: 75% Average 39nm 48nm Magenta Subtractive Filter ( Angle) 1 Green Additive Filter ( Angle) 1 % Transmittance % Transmittance Wavelength (nm) T: 8% Average 38nm 475nm 5% Points 495nm & 65nm T: 8% Average 65nm 75nm R: 99% Average 535nm 565nm Wavelength (nm) R: 99% Average 38nm 46nm 5% Points 55nm & 575nm (nominal) R: 99% Average 6nm 73nm T: 85% Min at 54nm cyan Subtractive Filter ( Angle) 1 red Additive Filter ( Angle) 1 % Transmittance % Transmittance Wavelength (nm) T: 8% Average 4nm 55nm 5% Point 59nm (nominal) R: 99% Average 64nm 74nm Wavelength (nm) R: 99% Average 37nm 55nm 5% Point 585nm (nominal) T: 8% Average 61nm 73nm Blue Reflective Filter (45 Angle) 1 red reflective Filter (45 Angle) 1 % Transmittance % Transmittance Wavelength (nm) T: 85% Average 525nm 8nm 5% Point 475nm (nominal) R: 9% Average 38nm 45nm Wavelength (nm) T: 85% Average 4nm 55nm 5% Point 58nm (nominal) R: 9% Average 61nm 725nm Questions? techstaff@andovercorp.com Dichroic Filters 39

42 Dichroic FIlter Sets Excellent for color process work, Andover s dichroic filter sets come in four configurations. Each set is accompanied by complete spectral curve data and shipped in an protective storage case. Full Color Processing Set Combines the additive and subtractive sets with 8-Piece Set Subtractive Additive Reflective blue and red reflective filters. This versatile set allows you to separate all of the primary colors by either transmission or reflection, and to redirect them to achieve an additive or subtractive effect. 25mm Ø 5mm Ø 5mm SQ 126FA FA FA48-5S 4 Andover Corporation Order online: Call toll-free in the US:

43 Color Subtractive Set Includes yellow, magenta and cyan filters in your choice of three sizes. % Transmittance Wavelength (nm) Yellow R: 99% Average 41nm 475nm 5% Cut-on 52nm (nominal) T: 85% Average 55nm 75nm Magenta T: 8% Average 38nm 475nm 5% Points 495nm & 65nm T: 8% Average 65nm 75nm R: 99% Average 535nm 565nm Cyan T: 8% Average 4nm 55nm 5% Point 59nm (nominal) R: 99% Average 64nm 74nm 25mm Ø 5mm Ø 5mm SQ 126FA FA FA44-5S Color Additive Set Includes blue, green and red filters in your choice of three size. % Transmittance Wavelength (nm) Blue R: 99% Average 54nm 75nm 5% Point 55nm (nominal) T: 8% Average 39nm 48nm Green R: 99% Average 38nm 46nm 5% Points 55nm & 575nm (nominal) R: 99% Average 6nm 73nm T: 85% Min at 54nm Red 1% Average 37nm 55nm 5% Point 585nm (nominal) 8% Average 61nm 73nm 25mm Ø 5mm Ø 5mm SQ 126FA FA FA44-5S Reflective Filters Sold individually or included in the full color processing set. % Transmittance Blue T: 85% Average 525nm 8nm 5% Point 475nm (nominal) R: 9% Average 38nm 45nm Red T: 85% Average 4nm 55nm 5% Point 58nm (nominal) R: 9% Average 61nm 725nm Wavelength (nm) Questions? techstaff@andovercorp.com Dichroic Filter Sets 41

44 Edge filters Useful for redirecting a particular band of light Provide steeper transition than color glass filters Offer coverage over the 4 1nm range Often referred to as long wave pass (LWP) and short wave pass (SWP) filters, edge filters provide a well-defined 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 fine-tuning the cut-on/cut-off wavelength. With their durable, first-surface dielectric coatings, Andover s edge filters are built to withstand the normal cleaning and handling required by any highquality optical component. General Specifications Size Tolerance Thickness Min. Clear Aperture Substrate Material Flatness Surface Quality Humidity and Abrasion Operating Temperature Cut-on/cut-off Slopes Cut-on/cut-off Tolerance +.mm/-.5mm 4.mm maximum 85% of outside dimension Glass 3 5 waves per 25mm 8/5 per MIL-C-48497A Per MIL-C-675A -5 C to +1 C 6% maximum ±1nm Applications Fluorescence Photometry Color Enhancement. and Combining Transmission Long Wave Pass Short Wave Pass 85% average from the 5% cut-on point to 2nm 85% average from the 5% cut-off point to.6 x the 5% cut-off point (Note: With the exception of the 4nm filter, all SWP filters will drop off in transmission at wavelengths under 425nm.) Rejection Long Wave Pass 99% or greater from.9 x the 5% point to the ultraviolet Short Wave Pass 99% or greater from 1.7 x the 5% point to 1.25 x the 5% point Effective Index of Refraction (n*) 1.7 (approximately) 42 Andover Corporation Order online: Call toll-free in the US:

45 Long Wave Pass % Transmittance Rejection Range.9 x 5% Cut-on Point Transmission Range 5% Cut-on Point To 2nm Wavelength (nm) Visible 5% Point 25mm Ø 5mm Ø 5mm SQ 4nm 4FH9-25 4FH9-5 4FH9-5S 45nm 45FH FH9-5 45FH9-5S 5nm 5FH9-25 5FH9-5 5FH9-5S 55nm 55FH FH9-5 55FH9-5S 6nm 6FH9-25 6FH9-5 6FH9-5S 65nm 65FH FH9-5 65FH9-5S 7nm 7FH9-25 7FH9-5 7FH9-5S Full Set 12FA FA9-5 12FA9-5S Near Infrared 5% Point 25mm Ø 5mm Ø 5mm SQ 75nm 75FH FH9-5 75FH9-5S 8nm 8FH9-25 8FH9-5 8FH9-5S 85nm 85FH FH9-5 85FH9-5S 9nm 9FH9-25 9FH9-5 9FH9-5S 95nm 95FH FH9-5 95FH9-5S 1nm 1FH9-25 1FH9-5 1FH9-5S Full Set 121FA FA FA9-5S Short Wave Pass 1 Visible 5% Point 25mm Ø 5mm Ø 5mm SQ % Transmittance Transmission Range 5% Cut-on Point 1.7 x 5% Cut-on Point Rejection Range 1.25 x 5% Cut-on Point Wavelength (nm) 4nm 4FL7-25 4FL7-5 4FL7-5S 45nm 45FL FL7-5 45FL7-5S 5nm 5FL7-25 5FL7-5 5FL7-5S 55nm 55FL FL7-5 55FL7-5S 6nm 6FL7-25 6FL7-5 6FL7-5S 65nm 65FL FL7-5 65FL7-5S 7nm 7FL7-25 7FL7-5 7FL7-5S Full Set 123FA FA FA7-5S Nea r Infrared 5% Point 25mm Ø 5mm Ø 5mm SQ 75nm 75FL FL7-5 75FL7-5S 8nm 8FL7-25 8FL7-5 8FL7-5S 85nm 85FL FL7-5 85FL7-5S 9nm 9FL7-25 9FL7-5 9FL7-5S 95nm 95FL FL7-5 95FL7-5S 1nm 1FL7-25 1FL7-5 1FL7-5S Full Set 124FA FA FA7-5S Questions? techstaff@andovercorp.com Edge Filters 43

46 Edge FIlter Sets Andover s long wave pass and short wave pass filter sets are available in a wide range of configurations and in three standard sizes. Also available are two variable bandpass filter sets that combine several LWP and SWP filters. Variable Pass Sets Visible swp/lwp set Includes seven long wave pass and seven short wave pass filters, providing coverage of the 4 7nm wavelength range. 4nm 45nm 5nm 55nm 6nm 65nm 7nm 25mm Ø 5mm Ø 5mm SQ 126FA FA FA97-5S Near Infrared swp/lwp set Includes six long wave pass and six short wave pass filters, providing coverage of the 75 1nm wavelength range. 75nm 8nm 85nm 9nm 95nm 1nm 25mm Ø 5mm Ø 5mm SQ 127FA FA FA97-5S 44 Andover Corporation Order online: Call toll-free in the US:

47 Short Wave Pass Sets Visible SWP Set Includes seven short wave pass filters, spaced at 5nm increments from 4 nm to 7nm. 4nm 45nm 5nm 55nm 6nm 65nm 7nm 25mm Ø 5mm Ø 5mm SQ 123FA FA FA7-5S Visible/Near Infrared SWP Set Combines the two sets listed on the left to create a 13-piece selection of filters that cover the 4 1nm spectrum. Near Infrared SWP Set Includes six long wave pass filters, spaced at 5nm increments from 75nm to 1nm. 75nm 8nm 85nm 9nm 95nm 1nm 25mm Ø 5mm Ø 5mm SQ 124FA FA FA7-5S 25mm Ø 5mm Ø 5mm SQ 125FA FA FA7-5S Long Wave Pass Sets Visible lwp set Includes seven long wave pass filters, spaced at 5nm increments from 4nm to 7nm. 4nm 45nm 5nm 55nm 6nm 65nm 7nm 25mm Ø 5mm Ø 5mm SQ 12FA FA9-5 12FA9-5S Visible/Near Infrared LWP SET Combines the two sets listed on the left to create a 13-piece selection of filters that cover the 4 1nm spectrum. Near Infrared lwp set Includes six long wave pass filters, spaced at 5nm increments from 75nm to 1nm. 75nm 8nm 85nm 9nm 95nm 1nm 25mm Ø 5mm Ø 5mm SQ 121FA FA FA9-5S 25mm Ø 5mm Ø 5mm SQ 122FA FA FA9-5S Questions? techstaff@andovercorp.com Edge Filter Sets 45

48 Vis/nir Beamsplit ters Hard-coated for maximum durability R/T ratios from 8/2 to 3/7 High-quality optical crown glass substrate When using a beamsplitter in an optical system, it is critical that all light incident upon the coating be reflected [R] or transmitted [T] with minimal loss due to absorption. To meet this requirement, Andover s VIS/NIR beamsplitters are constructed of all dielectric materials that keep absorption to just.5 1.%, depending on the R/T ratio. To minimize reflections, we add broadband antireflective coatings that meet or exceed the following environmental specifications. These beamsplitters are designed for use at a 45 angle of incidence in randomly polarized light. GENERAL SPECIFICATIONS Substrate Material Thickness Size Tolerance Coating Quality Surface Quality Humidity and Abrasion Max. Operating Temperature Flatness Parallelism Angle of Incidence Min. Clear Aperture Schott BK-7 3mm ±.5mm +./-.25mm 6/4 per MIL-C-48497A 8/5 per MIL-C-48497A Per MIL-C-48497A +1 C l/4 wave per 25mm or better 3 arc seconds or better 45 random polarization 85% of outside dimension Applications Microscopy Spectroscopy Interferometry Astronomy R/T Ratio Tx Range 25mm Ø 5mm Sq. 8/ nm VBS-8/2-25 VBS-8/2-5S 7/ nm VBS-7/3-25 VBS-7/3-5S 6/ nm VBS-6/4-25 VBS-6/4-5S 5/5 4 7nm VBS-5/5-25 VBS-5/5-5S 5/5 7 11nm RBS-5/5-25 RBS-5/5-5S 4/6 4 7nm VBS-4/6-25 VBS-4/6-5S 3/7 4 7nm VBS-3/7-25 VBS-3/7-5S 5/5 Dielectric VISIBLE (45 Angle) % Transmittance Wavelength (nm) 46 Andover Corporation Order online: Call toll-free in the US:

49 HARDWOOD Vis/nir Beamsplit STORAGE ters CASES Hardwood construction Plated metal hardware Custom engraving available These cases are a great way to store and organize your filters and optics. All cases are made from hardwood, and utilize sturdy plated hinges and clasps. Choose from a variety of case sizes and foam configuations. Custom laser engraving is also available. Cases with pre-cut foam inserts Outside dimensions L x W x H (approx.) Foam configuration accomodates: Part Numbers 3.75" x 3.75" x 2.75" Six filters up to 25mm dia. CASE " x 4.75" x 2.75" Eight filters up to 25mm dia. CASE " x 4.75" x 2.75" Twelve filters up to 25mm dia. CASE " x 3.75" x 3.5" Six filters up to 5mm sq. CASE " x 3.75" x 3.5" Eight filters up to 5mm sq. CASE " x 3.75" x 3.5" Twelve filters up to 5mm sq. CASE-12-5 Cases with foam blanks Outside dimensions L x W x H (approx.) Inside dimensions of base L x W x H (approx.) Part Numbers 3.5" x 3.5" x 1.5" 2.75" x 2.75" x.5" CASE-2x2 4.75" x 4.75" x 2.5" 4" x 4" x 1.5" CASE-4x4 6.75" x 6.75" x 2.5" 6" x 6" x 1.5" CASE-6x6 9.75" x 9.75" x 2.5" 9" x 9" x 1.5" CASE-9x9 Questions? techstaff@andovercorp.com Storage Cases 47

50 Infrared Filters & Coatings High optical quality Available from stock Custom sizes available Infrared Windows & Substrates Andover stocks a variety of optical-quality infraredtransmitting substrates. All substrates are polished to a transmitted wavefront of 2 waves or better and parallel to less than 1 arc minutes. A/R coatings are also available; see next page for details. For your convenience and economy, we offer the windows in two standard sizes: 25 mm and 5 mm dia. However, we can produce custom sizes and shapes. Contact our technical sales department for a quotation. GENERAL SPECIFICATIONS Diameter tolerance Thickness Flatness: Parallelism: Surface Quality: CTE: +/-.1mm 1. ±.2mm 2 waves at 632.8nm <1 arc minutes 6/4 per MIL-C-48497A Coefficient of Thermal Expansion (see tables) Applications Thermal imaging Weapons systems Detector windows IR photography size, Shape & Part Number Substrate Material 25mm Ø 5mm Ø Silicon (Si) IRWS1-25 IRWS1-5 Germanium (Ge) IRWS2-25 IRWS2-5 Sapphire (Al2O3) IRWS3-25 IRWS3-5 Fused Silica (SiO2) IRWS4-25 IRWS4-5 Calcuim Fluoride (CaF2) IRWS5-25 IRWS5-5 Zinc Selenide (ZnSe) IRWS6-25 IRWS6-5 % Transmittance mm thick uncoated sample Silicon Silicon (Si) is an economical choice for many IR applications. Refractive index: 3.43 at 3.µm CTE (1-6/ C): 4.15 Hardness (Knoop): Wavelength (µm) 48 Andover Corporation Order online: Call toll-free in the US:

51 % Transmittance mm thick uncoated sample germanium Germanium (Ge) is widely used for lenses and windows in the Mid-IR region. Refractive index: CTE (1-6/ C): 5.7 Hardness (Knoop): at 1.6µm Wavelength (µm) % Transmittance mm thick uncoated sample Sapphire Sapphire (Al2O3) is transparent over a wide range, and has excellent mechanical strength. Refractive index: CTE (1-6/ C): 7.7 Hardness (Knoop): at 2.µm Wavelength (µm) % Transmittance mm thick uncoated sample Wavelength (µm) fused silica Fused silica (SiO2) has good transmission from the UV to the near IR, exhibits minimal fluorescence, and has a very low CTE. Refractive index: CTE (1-6/ C):.55 Hardness (Knoop): at 1.µm % Transmittance mm thick uncoated sample calcium fluoride Calcium Fluoride (CaF2) has good transmission from the UV to the Mid-IR. Refractive index: CTE (1-6/ C): 18.9 Hardness (Knoop): at 5.µm % Transmittance mm thick uncoated sample Wavelength (µm) zinc selenide Zinc Selenide (ZnSe) is widely used for lenses and windows in the Mid-IR region. Refractive index: CTE (1-6/ C): 7.6 Hardness (Knoop): at 1.6µm Wavelength (µm) Questions? techstaff@andovercorp.com Infrared Filters 49

52 Infrared Filters & Coatings Broadband A/R Coating on Germanium Andover now produces a non-radioactive dielectric multilayer coating designed to reduce the reflection of Germanium substrates in the infrared. Reflection is reduced from 36% per surface to less than.5% per surface. Reduces reflection from 36% to.5% per surface Constructed of hard, durable, non-radioactive materials Meets MIL-C Constructed of hard, durable first-surface dielectric coatings on optical-quality germanium substrates, these filters will withstand cleaning and handling associated with any highquality optical component. For your convenience and economy, we offer the filters in two standard sizes. 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 Thickness 1. ±.2mm Min. Clear Aperture 9% Substrate Material Germanium (other substrates available) Flatness: 2 waves at 632.8nm Parallelism: <1 arc minutes Surface Quality: 6/4 per MIL-C-48497A Coating Quality: 6/4 per MIL-C-48497A 24-hour humidity per MIL-C-48497A Moderate Abrasion per MIL-C-48497A Adhesion per MIL-C-48497A Operating Temperature -62 C to +71 C Applications Thermal imaging Weapons systems Detector windows Dewar windows 5 Andover Corporation Order online: Call toll-free in the US:

53 3 Germanium 3-5µm A/R Coating 3 Germanium 8-12µm A/R Coating % Reflection % Reflection Wavelength (µm) Wavelength (µm) 3 Germanium 8-14µm A/R Coating 1 Germanium 2-14µm A/R Coating % Reflection % Transmission A/R Coated Ge Uncoated Ge Wavelength (µm) Wavelength (µm) 25mm Ø 5mm Ø 3-5 µm A/R coated Germanium Window GEBBAR GEBBAR µm A/R coated Germanium Window GEBBAR GEBBAR µm A/R coated Germanium Window GEBBAR GEBBAR µm A/R coated Germanium Window GEBBAR GEBBAR Questions? techstaff@andovercorp.com Infrared Filters 51

54 Infrared Filters & Coatings Useful for isolating broad spectral regions Constructed of hard, durable first-surface coatings Available in standard and custom wavelengths GENERAL SPECIFICATIONS Standard Long Wave Pass Filters Long wave pass filters provide a sharp cut-off 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. Constructed of hard, durable first-surface dielectric coatings on optical-quality IR-transmitting substrates, these filters will withstand normal cleaning and handling associated with any high-quality optical component. For your convenience and economy, we offer the filters in two standard sizes: 25 mm and 5 mm dia. However, we can produce custom sizes and shapes, as well as custom optical characteristics. Contact our technical sales department for a quotation. Diameter tolerance: +/-.1mm Thickness: 1. ±.2mm Min. Clear Aperture: 9% Substrate Material: Silicon, Germainum, or Sapphire Flatness: 3-5 waves at cut-on W/L Surface Quality: 6/4 per MIL-C-48497A Coating Quality: 6/4 per MIL-C-48497A 24-hour humidity per MIL-C-48497A Moderate Abrasion per MIL-C-48497A Adhesion per MIL-C-48497A Operating Temperature -62 C to +71 C Parallelism: <1 arc minutes Transmission (Ave): >9% from 1.5 x cut-on to 2. x cut-on Rejection (Ave): <.1% Slope: <6% (12% for 1.5µm filter) Applications Order sorting FTIR spectroscopy Thermal imaging Standard Long Pass Filters 5% point cut-on W/L 25mm Ø 5mm Ø 1.5µm ±.4µm 1.5ILP ILP µm ±.7µm 1.65ILP ILP-5 2.4µm ±.9µm 2.4ILP ILP-5 3.6µm ±.14µm 3.6ILP ILP-5 4.5µm ±.18µm 4.5ILP ILP-5 7.3µm ±.29µm 7.3ILP ILP-5 52 Andover Corporation Order online: Call toll-free in the US:

55 Custom IR Long and Short 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 in-house, including thin-film coating design, mechanical design, substrate fabrication and polishing, 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 5% point cut-on W/L 25mm Ø 5mm Ø 2.2µm - 5.µm IRLWP1-25 IRLWP µm - 7.µm IRLWP12-25 IRLWP µm - 11.µm IRLWP14-25 IRLWP14-5 % Transmission Typical IR Long Pass Filter Wavelength (µm) Custom Short Pass Filters 5% point cut-off W/L 25mm Ø 5mm Ø 2.2µm - 5.µm IRSWP1-25 IRSWP µm - 7.µm IRSWP12-25 IRSWP µm - 11.µm IRSWP14-25 IRSWP14-5 % Transmission Typical IR Short Pass Filter Wavelength (µm) Questions? techstaff@andovercorp.com Infrared Filters 53

56 Infrared Filters & Coatings Useful for isolating narrow spectral regions Constructed of hard, durable first-surface coatings Available in standard and custom wavelengths up to 14µm 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 first-surface dielectric coatings on optical-quality IR-transmitting substrates, these filters will withstand normal cleaning and handling associated with any high-quality optical component. For your convenience and economy, we offer the filters in 25mm dia. 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 21mm Center W/L tolerance ±3nm Bandwidth tolerance ±3nm Transmission (Typ.): 6-8% Surface Quality: 6/4 per MIL-C-48497A Coating Quality: 6/4 per MIL-C-48497A 24-hour humidity per MIL-C-48497A Moderate Abrasion per MIL-C-48497A Adhesion per MIL-C-48497A Applications Environmental monitoring Security systems FLIR systems Avionics Standard IR Gas Analysis Bandpass Filters Gas Center W/L Bandwidth Part Number Water Vapor 2.7 µm 12nm 2.7GA5-25 Water Vapor 2.95 µm 13nm 2.95GA5-25 Methane and Ethanol 3.46 µm 14nm 3.46GA5-25 CO µm 12nm 4.26GA5-25 CO 4.67 µm 15nm 4.7GA Andover Corporation Order online: Call toll-free in the US:

57 Custom Infrared Bandpass Filters Andover can design and fabricate custom bandpass filters to suit your particular requirements. Every phase of the process is performed in-house, including thin-film coating design, mechanical design, substrate fabrication and polishing, 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 IR Bandpass Filter Specifications Bandwidth (% of CW/L) W/L Range Transmission (Typ.) Blocking Part Numbers >1% 2.4 µm - 5. µm 7-8%.3 to 4 µm IRFC µm µm 7-8%.3 to 15 µm IRFC µm µm 6-7%.3 to 15 µm IRFC µm µm 6-7%.3 to 15 µm IRFC µm µm 5-6%.3 to 15 µm IRFC % 2.4 µm - 5. µm 7-8%.3 to 4 µm IRFC µm µm 7-8%.3 to 15 µm IRFC µm µm 6-7%.3 to 15 µm IRFC µm µm 5-6%.3 to 15 µm IRFC µm µm 4-6%.3 to 15 µm IRFC % 2.4 µm - 5. µm 5-8%.3 to 4 µm IRFC µm µm 5-8%.3 to 15 µm IRFC µm µm 4-7%.3 to 15 µm IRFC µm µm 4-6%.3 to 15 µm IRFC µm µm 3-6%.3 to 15 µm IRFC38-25 Custom spectral and physical properties available upon request % Transmission Typical IR Bandpass Filter FWHM =.25 µm (2.9%) Wavelength (µm) Attenuation (db) Typical Out-of-Band Blocking Wavelength (µm) Avg. attenuation -6 db (.1%) Questions? techstaff@andovercorp.com Infrared Filters 55

58 Infrared Filters & Coatings Provides attenuation with greater linearity over a wide spectral range Delivers superior durability Custom substrates available Infrared Neutral Density Filters Metallic-coated neutral density (ND) filters obtain their optical density from a metal alloy coating on a substrate determined by the wavelength region of interest. Unlike the all-dielectric or absorption type, the metallic type ND filter employs a combination of absorption and reflection to reduce the intensity of light. GENERAL SPECIFICAtions Thickness Dimensional Tolerances Clear Aperture Surface Quality Coating Adherence Humidity Substrate Material Optical Quality Applications Thermal imaging Medical Imaging 1.mm IR test bench ±.2mm IR photography 9% of outside dimension 6/4 per MIL--1383B Per MIL-M-1358C Per MIL-STD-81F Germanium Flatness of 3-5 waves per inch and parallelism of 1 arc minutes or better Optical Density Nominal Transmittance (%) size, Shape & Part Number Max deviation from nominal 25mm Ø 5mm Ø ±3. 3FNIR-25 3FNIR ±1.5 5FNIR-25 5FNIR ±1. 1FNIR-25 1FNIR ±.2 2FNIR-25 2FNIR-5 2 % Transmittance Typical 1. ND filter Wavelength (µm) 56 Andover Corporation Order online: Call toll-free in the US:

59 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, Sapphire and chalcogenides. Coating types include A/R, bandpass, long and short pass, dichroic, and more. % Transmission Custom IR/VIS Beamsplitter Wavelength (nm) 1 Custom IR Dichroic Beamsplitter % Transmission angle, random polarization Wavelength (nm) Andover can also design infrared coatings to function as dichroics, reflecting one region while allowing the transmittance of another. While generally operating at or 45, the coatings can be optimized for any particular angle or range of angles of incidence. Also available are custom dichroics that transmit visible and far infrared light simultaneously. Questions? techstaff@andovercorp.com Infrared Filters 57

60 Colored Gl ass Filters Fabricated from Schott optical filter glass Excellent color consistency as well as sharp contrast Both surfaces precisionpolished Options span ultraviolet to infrared region 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 signal-to-noise ratio of illumination systems, transmit 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 Mechanical Thickness Size Tolerance Surface Quality Max. Operating Temperature Transmitted wavefront (TWF) Parallelism Spectral Data 3mm ±.5mm Add.8mm for ring mount +./-.25mm 8/5 per MIL-M C 1/4 wave per inch 3 arc seconds or better Stated as internal transmittance Applications Machine Vision Astronomy Microscopy Electronic Instrumentation Calibration Medical Devices Note: Corners are cropped on all 165mm sq. parts unless otherwise requested. Bandpass Type UG BG Ultraviolet Transmitting Blue and Blue-Green Heat absorbing Type KG Infrared Absorbing We check all filter glass for striae, bubbles, and inclusion using our tunable interferometer and custom-designed inclusion tester. These instruments detect minute defects, even in materials that do not transmit visible light. Long wave Pass Type RG Near Infrared Transmitting GG Yellow OG Orange WG Utraviolet Transmitting 58 Andover Corporation Order online: Call toll-free in the US:

61 Bandpass type Internal Transmittance Wavelength (nm) UG-11 UG-5 UG Glass Type 25mm Ø 5mm Ø 5mm SQ 165mm SQ UG-1 1FG9-25 1FG9-5 1FG9-5S 1FG9-165S UG-5 5FG9-25 5FG9-5 5FG9-5S 5FG9-165S UG-11 11FG FG9-5 11FG9-5S 11FG9-165S BG-23 23FG FG FG11-5S 23FG11-165S BG-25 25FG FG FG11-5S 25FG11-165S BG-38 38FG FG FG11-5S 38FG11-165S S-8612 S86FG11-25 S86FG11-5 S86FG11-5S S86FG11-165S Bandpass type S Internal Transmittance BG-25 BG-23 BG Wavelength (nm) Questions? techstaff@andovercorp.com Colored Glass Filters 59

62 Heat absorbing type Internal Transmittance Wavelength (nm) KG-5 KG-3 KG Glass Type 25mm Ø 5mm Ø 5mm SQ 165mm SQ KG-1. 1FG FG13-5 1FG13-5S 1FG13-165S KG-3. 3FG FG13-5 3FG13-5S 3FG13-165S KG-5. 5FG FG13-5 5FG13-5S 5FG13-165S WG-28 28FG FG1-5 28FG1-5S 28FG1-165S WG FG FG FG1-5S 295FG1-165S WG-35 35FG FG1-5 35FG1-5S 35FG1-165S WG-32 32FG FG1-5 32FG1-5S 32FG1-165S GG FG FG FG3-5S 395FG3-165S long wave pass type Internal Transmittance WG-28 WG-295 WG-35 WG-32 GG Wavelength (nm) Andover Corporation Order online: Call toll-free in the US:

63 long wave pass type Internal Transmittance GG-4 GG-42 GG-435 GG-455 GG-475 GG-495 OG-515 OG-53 OG-55 OG-57 OG-59 RG-61 RG-63 RG Wavelength (nm) RG-665 RG-695 RG-715 RG-9 RG-78 RG-83 RG Glass Type 25mm Ø 5mm Ø 5mm SQ 165mm SQ GG-4 4FG3-25 4FG3-5 4FG3-5S 4FG3-165S GG-42 42FG FG3-5 42FG3-5S 42FG3-165S GG FG FG FG3-5S 435FG3-165S GG FG FG FG3-5S 455FG3-165S GG FG FG FG3-5S 475FG3-165S GG FG FG FG3-5S 495FG3-165S OG FG FG FG5-5S 515FG5-165S OG-53 53FG FG5-5 53FG5-5S 53FG5-165S OG-55 55FG FG5-5 55FG5-5S 55FG5-165S OG-57 57FG FG5-5 57FG5-5S 57FG5-165S OG-59 59FG FG5-5 59FG5-5S 59FG5-165S RG-61 61FG FG7-5 61FG7-5S 61FG7-165S RG-63 63FG FG7-5 63FG7-5S 63FG7-165S RG FG FG FG7-5S 645FG7-165S RG FG FG FG7-5S 665FG7-165S RG FG FG FG7-5S 695FG7-165S RG FG FG FG7-5S 715FG7-165S RG-9. 9FG7-25 9FG7-5 9FG7-5S 9FG7-165S RG-78 78FG FG7-5 78FG7-5S 78FG7-165S RG-83 83FG FG7-5 83FG7-5S 83FG7-165S RG-85 85FG FG7-5 85FG7-5S 85FG7-165S Questions? techstaff@andovercorp.com Colored Glass Filters 61

64 Epolite FH-5313 Epoxy Ideal for bonding a variety of optical substrates and potting electronic assemblies Excellent chemical resistance, mechanical strength Appropriate for low fluorescence applications Fuller Epolite FH-5313 is a 1% solid, room-temperature 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 2 F. Resin and hardener sold individually or in kits and in premeasured A-Paks. Type Weight and Content part Number Premeasured A-Pak 5.2 grams Resin,.8 grams Hardener FH-5313A-A-PAK Resin & Hardener Kit 16oz. Resin, 2oz. Hardener, 6 Droppers FH-5313A-KIT Resin Only 16oz. FH-5313A-RESIN/16 64oz. FH-5313A-RESIN/64 128oz. FH-5313A-RESIN/128 Hardener Only 2oz. FH-5313A-HARD/2 8oz. FH-5313A-HARD/8 16oz. FH-5313A-HARD/16 62 Andover Corporation Order online: Call toll-free in the US:

65 Certified results from an independent testing lab. General Properties VALUE test METHOD Specific Gravity 1.17 ASTM-D-792- Hardness, Shore D 81 ASTM-D-224-4e1 Strength. Tensile 7,94 psi ASTM-D Shear 782 psi ASTM-D-12-1 Compressive 15,44 psi ASTM-D-695-2a Flexural 13,86 psi ASTM-D-79-3 Coefficient of Linear Thermal Expansion 93.5 ppm/ C ASTM-E Mixed Viscosity 1,97 cp MIL-STD-883E Pot Life Minutes at 77 F 3 ERF 13-7 Cure Schedule Hours at 77 F 12.. Cure Schedule Hours at 15 F 1 Mix Ratio by Weight (A:B) 1:15 Electrical Properties Dielectric Strength 2,128 volts/mil ASTM-D a Dielectric Hz 4.6 ASTM-D Dissipation Hz.1 ASTM-D Volume Resistivity, ohm/cm 8.4 x 1 14 ASTM-D Chemical Resistance Isopropyl Alcohol. Weight Change.15% ASTM-D Thickness Change.92% ATSM-D Jet A. Weight Change.55% ASTM-D Thickness Change.519% ASTM-D Outgassing Properties Total Mass Loss.56% ASTM-E-595-3e2 Collected Volatile Condensable Material <.1% ASTM-E-595-3e2 Water Vapor Regain.29% ASTM-E-595-3e2 Optical transmission 1 % Transmittance Refractive index = Wavelength (nm) Based on.1"-thick sample sandwiched between two 1mm-thick fused silica substrates. Questions? techstaff@andovercorp.com Epolite FH-5313 Epoxy 63

66 ACCESSORIES Motorized or Manual Local or Remote Control Accepts 12.5mm and 25mm dia. filters Programmable Filter Sequences Motorized Filter Wheel These filter wheels are used for a host of applications, including color CCD photography, fluorescence microscopy, and photometry. Two 4" dia, wheels are available: one which accepts six 25mm filters, and one which accepts twelve 12.5mm filters. Remote or Manual Operation Filter selection can be made manually from push buttons on the unit, or remotely from either a USB 2. interface, or a BNC input. The BNC input accepts a TTL level signal to trigger the rotation of the filter wheel. Interchangeable filter wheels The 4" dia. wheel is easily changed, allowing quick conversions between applications. Additional wheels are available. Programming and Remote Control Automation of filter sequences is available through the USB 2. interface. A simple command language facilitates retrieving filter status and making filter selections. The unit comes with the controller, filter housing, filter wheel, and a 5 VDC power supply, and threaded rings to hold the optics in place. Applications Color CCD photography Fluorescence microscopy Photometry GENERAL SPECIFICATIONS Access time between filters <.4 seconds to adjacent location Accuracy/repeatability ±2 Interface: BNC TTL (max indexing rate.5hz) USB USB 2. Manual Push button switches Mounting 1/4-2 & #8-32 (M6 & M4) or SM1/SM5 thread Size 5." x 4.49" x 1.85" (5.43" with BNC) 64 Andover Corporation Order online: Call toll-free in the US:

67 Accepts 12.5mm or 25mm dia. filters Motorized and manual versions available Labeled filter positions Base and post mountable Filter Wheel Ordering Info Size & Part Number Description 12-position, 12.5mm Ø 6-position, 25mm Ø Motorized filter wheel FW-MOT-12.5 FW-MOT-25 Manual filter wheel FW-MAN-12.5 FW-MAN-25 Extra wheel only FW-12.5 FW-25 User-Defined Filter Sets Andover Corporation offers customers the opportunity to build their own filter sets from across our product listings whether bandpass, neutral density, dichroic, edge, or other filter category. The only restriction is that the filters must be the same size. Take your choice of six, eight and twelve-piece sets in one of two standard sizes. All filter sets include complete spectral curve data and are shipped with a hardwood storage case. Size & Part Number 12.5mm Ø 25mm Ø 6-Piece Set FS FS Piece Set FS FS Piece Set FS FS12-25 With this special offer, you automatically save 5% on a 6-piece set 8% on a 8-piece set 1% on a 12-piece set Questions? techstaff@andovercorp.com Accessories 65

68 Calibration Filter Sets Spectrophotometric glass filters for verifying transmittance and absorption scales Calibration standards traceable to NIST Shipped in an aluminum storage case Andover offers two filter sets for verifying the transmittance and absorbance scales of visible absorption spectrophotometers with maximum bandwidths of 2.2nm and 6.5nm. Made of uncoated Schott NG-4 and NG-5 glass, the filters are polished over the central 5mm x 2mm area to a transmitted wavefront of l/4 wave or better at 633nm and parallelism of 3 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 44nm, 465nm, 546.1nm, 59nm and 635nm. AC-93 Filter Set The AC-93 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%, 2%, and 3%. AC-193 Filter Set The AC-193 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%, 3%, and 5%. Description Transmittance Values Part Number AC-93 Filter Set 1%, 2%, 3% AC-93 AC-193 Filter Set 1%, 3%, 5% AC-193 Recalibration 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, recalibration, and recertification. Please contact the Sales Department at (888) before returning your filter set. 66 Andover Corporation Order online: Call toll-free in the US:

69 GLossary A AR Coating Absorptance B B/W Bandpass Filter Bandwidth Blocking Range C Cavity Center Wavelength Cold Mirror Commercial Quality CW/L F Fabry-Perot Filter Antireflective coating that reduces the surface reflection of an optic The ratio of absorbed to incident radiation 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) The spectral range of unwanted radiation An internal structure of a bandpass filter, consisting of two reflecting stacks of dielectric material separated by an even-ordered spacer. The number of cavities determines the shape of the passband The wavelength coinciding with the midpoint of the passband A filter which reflects the visible energy and transmits the near infrared energy A filter designed for use in nonimaging instrumentation applications Center wavelength Dielectric filter construction based on the Fabry-Perot interferometer. Consists of two reflective stacks separated by an even-ordered spacer FIR Far Infrared (wavelengths from. 3mm to 1mm) FWHM H Hot Mirror I Image Quality Index of Refraction Interferometer Full width at half maximum or the bandwidth of the filter A filter that reflects the near infrared energy (heat) and transmits the visible energy A filter designed for use in imaging applications 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 IR Infrared Spectrum (wavelengths. from 3mm to 3mm) L Long Pass Filter M MDM N A filter which transmits the longer wavelengths and rejects the shorter wavelengths Metal-Dielectric-Metal N* The effective refractive index of the filter ND Filter NIR P Passband Polarization R A neutral density filter that transmits a specific amount of energy equally over all wavelengths Near Infrared Spectrum (wavelengths from 75nm to 3mm ) 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 R/T ratio The ratio of reflectance to transmittance Reflectance Refractive Index S Short Pass Filter Spectrophotometer T T or Tx Transmittance U The ratio of the total amount of radiation reflected by a surface to the total amount of radiation incident on the surface The ratio of the velocity of light in a vacuum to the velocity of light in a refractive material A filter that transmits the shorter wavelengths and rejects the longer wavelengths An instrument that measures intensity of light at varying wavelengths Transmittance The ratio of the radiant energy transmitted to the total radiant energy incident on the filter UV Ultraviolet spectrum (wavelengths below 4nm) V VIS Visible spectrum (wavelengths from 4nm to 75nm) Questions? techstaff@andovercorp.com Glossary 67

70 International Representatives Corporate Headquarters Andover Corporation 4 Commercial Drive. Salem, New Hampshire USA Tel: Fax: US Toll-free: techstaff@andovercorp.com Australia Lastek Pty. Ltd. 1 Reid Street University of Adelaide Thebarton Campus Thebarton S. A. 531 Australia Tel: Fax: sales@lastek.com Belgium Laser 2 Benelux CV PO Box Zj Vinkeveen Nederland Tel: Fax: info@laser2.nl LOT-Oriel BeNeLux Meenseweg LEPER Belgium Tel (B): Tel (NL): Fax: (general): info@lot-oriel.nl (technical): fischbach@lot-oriel.de Brazil Quimlab Ltda Av. Shishima Hifumi, 2911 Parque Technológico Univap - Urbanova São José dos Campos - São Paulo Brazil Tel: Fax: rosangela@quimlab.com.br Canada Delta Photonics Unit A-6, 2285 St. Laurent Blvd Ottawa, ON K1G 4Z4 Canada Tel: Fax: sales@deltaphotonics.com China DynaSense Photonics Co., Ltd. Rm.14, Zhucheng Plaza No. 6A Zhongguancun Nandajie Haidian District Beijing 186 China Tel: Fax: Mobile: judy-wang@dyna-sense.com Titan Electro-Optics Co., Ltd - BEIJING Room A83, ZhiChun Building No. 118 ZhiChun Road, HaiDian District Beijing China Tel: Fax: sales@teo.com.cn France Laser 2 SA Parc d affaires 3 Rue de la Plaine F-7886 Saint-Nom-la-Breteche France Tel: +33 () Fax: +33 () durand@laser2.fr LOT-Oriel Sarl 4, allée des Garays ZA des Glaises 9112 PALAISEAU France Tel: Fax: filtres-optiques@lot-oriel.fr Germany LOT-Oriel GmbH & Co. KG Im Tiefen See 58 D Darmstadt Germany Tel: Fax: (general): info@lot-oriel.de (technical): fischbach@lot-oriel.de Hong Kong Titan Electro-Optics Co., Ltd - BEIJING Room A83, ZhiChun Building No. 118 ZhiChun Road, HaiDian District Beijing CHINA Tel: Fax: sales@teo.com.cn India Liberty International #414, Abhishree Opp. Star Bazarr, Satellite Ahmedabad India Tel: Fax: bobliberty@sprintmail.com Scientific Solutions JF-38,LG Floor Khirki Extn., Malviya Nagar New Delhi-1117 India Tel: Fax: info@scientificsolutions.in Israel S.K. Advanced Solutions LTD P.O. Box 1651 Ramat Hasharon ISRAEL Tel: Fax: sales@sk-advanced.com Italy LOT-Oriel Italia s.r.l. Via F. Sapori, Roma Italy Tel: Fax: info@lot-oriel.it Japan Hi Technology Trading Inc. 2-7 Nihonbashi-ohdenmacho Chuo-ku Tokyo Japan Tel: Fax: sales@hi-technology.co.jp Infrared Limited , Shakujii-machi Nerima-ku, Tokyo Japan Tel: Fax: mori@infrared.co.jp 68 Andover Corporation Order online: Call toll-free in the US:

71 Please visit for the most up-to-date listing of international representatives. Korea Dongwoo Optron Co., Ltd 611-5, MaeSan-Ri Opo-Eup,KwangJu-Si Kyunggi-do, Korea Tel: Fax: optron@optron.co.kr MJL Crystek, Inc. #1117 Expotel 381 Mannyeon-Dong Seo-gu, Daejon, Korea Tel: Fax: sales@mjlinc.com The Netherlands and Belgium Laser 2 Benelux CV PO Box Zj Vinkeveen Nederland Tel: Fax: info@laser2.nl LOT-Oriel BeNeLux Meenseweg LEPER Belgium Tel (B): Tel (NL): Fax: (general): info@lot-oriel.nl (technical): fischbach@lot-oriel.de Te Lintelo Systems BV Stijn Streuvelsstraat KT Zevenaar Netherlands Tel: Fax: sales@tlsbv.nl Norway Mestec A/S Grenseveien OSLO Norway Tel: Fax: steinar@mestec.no Poland LOT-Oriel Polska Szyb Walenty RUDA SLASKA Poland Tel: ext 11 Fax: ext 11 (general): info@lot-oriel.pl (technical): fischbach@lot-oriel.de Russia AcademLot ul. Butlerova MOSCOW Russia Tel: Fax: (general): info@lot-oriel.ru (technical): fischbach@lot-oriel.de Singapore, Malaysia and Thailand Photonitech Pte. Ltd. 9, Jurong Town Hall Road #2-52 Singapore Tel: Fax: wu@photonitech.com Spain & Portugal Iberlaser Av. Pirineos no.7, of. 2-8B 287 SAN SEBASTIAN DE LOS REYES (MADRID) Spain Tel : Fax : info@iberlaser.com LOT-Oriel Iberia C/ Caléndula ALCOBENDAS (MADRID) Spain Tel: Fax: (general): info@lot-oriel.es (technical): fischbach@lot-oriel.de Sweden, Denmark, Finland and Norway LOT-Oriel Nordic Stockholmsvägen 8B SÖDERTÄLJE Sweden Tel: Fax: (general): info@lot-oriel.se (technical): fischbach@lot-oriel.de Switzerland LOT-ORIEL Suisse Moulin-du-Choc 1122 Romanel-sur-Morges Suisse Tel: Fax: suisse@lot-oriel.com Taiwan ROC Onset Electro-Optics Co., Ltd 5F-2, No. 129, Lane 235 Bao Chiao Road Hsin Tien City 231 Taipei County, Taiwan, R.O.C. Tel: Fax: sales@onset-eo.com SLEO Photonics Co., Ltd 6F, #2, Lane 74 Ander Street Hsin Tien City, Taipei County, Taiwan 23154, R.O.C. Tel: Fax: sleo.jimmy@msa.hinet.net Unice E-O Services, Inc. 3F,No. 25-2, Ji Lin Road Chung Li Industiral Park Chung Li, Taiwan, R.O.C. Tel: Fax: im-exporter@ .unice.com.tw UK and Ireland LOT-Oriel Ltd. 1 Mole Business Park Leatherhead, Surrey KT22 7BA UK Tel: Fax: andover@lotoriel.co.uk Questions? techstaff@andovercorp.com International Representatives 69

72 Index A Absorbance Calibration Filters Absorbance Calibration Filter Set Absorptive Neutral Density Filters Absorptive Neutral Density Filter Sets Accessories Filter Wheels Analytical Line Filters Angle of Incidence Effects ( l q ) Antireflective Coatings Antireflective Coatings - Infrared Astronomy Filters UBVRI Nebula B Bandpass Filters Infrared Image Quality Near Infrared Semi-Custom Standard Products Ultraviolet Visible Bandpass Filter Sets Standard Filter Sets Mercury Line Filter Set, UV Mercury Line Set, UV/NIR Mercury Line Set, UV/VIS/NIR Near Infrared Sets Ultraviolet Filter Sets Visible Sets 1/4/8nm User Defined Filter Sets Zinc Cadmium Filter Set Beamsplitters Blue Additive Filter Blue Reflective Filter C Calcium Fluoride (CaF 2 ) windows Calibration Filters, Absorbance Type Cases, wooden storage Coatings Antireflection Beamsplitter Dichroic Infrared Metallic Neutral Density Filters, VIS Metallic Neutral Density Filters, IR Cold Mirrors Color Additive Filters Color Additive Filter Set Color Processing Filters Color Processing Filter Set Color Reflective Filters Color Reflective Filter Set Color Subtractive Filters Color Subtractive Filter Set Colored Filter Glass Controller (Filter Temperature) Custom Filters Bandpass, UV-VIS-NIR Bandpass, IR Long and Short Pass, IR Cut-On Filters (LWP) UV-VIS-NIR IR Cut-Off Filters (SWP) UV-VIS-NIR IR Cut-On, Cut-Off Filter Sets (LWP/SWP) D Density, (Neutral Density) Absorbing Glass Type Absorbance Calibration Filters Ultraviolet/Visible/Near Infrared Visible/Near Infrared Neutral Density Sets Metallic Coated Absorption Dichroic Filters Color Additive and Subtractive Color Reflective Filters, Blue/Red Dichroic Filter Sets Color Additive Color Processing Color Subtractive E Edge Filters (LWP/SWP) Near Infrared Long Wave Pass Andover Corporation Order online: Call toll-free in the US:

73 Near Infrared Short Wave Pass Variable Bandpass Filters, VIS/NIR Visible Long Wave Pass Visible Short Wave Pass Filters Edge Filter Sets (LWP/SWP) F Fabrication and Polishing Filters Broadband Color Additive, Color Subtractive Color Processing Filters Colored Filter Glass Dichroic Dichroic Filter Sets Edge Filters LWP/SWP Heat Control Filters Cold Mirrors Hot Mirrors Infrared Bandpass Infrared Long and Short Pass Infrared Neutral Density Infrared Suppression Filters Ultraviolet Cold Mirrors Image Quality Filters Long Wave Pass Neutral Density Filters Short Wave Pass Ultraviolet Filters Filter Cases, Wooden Filter Ovens (Temperature Controllers) Filter Sets Dichroic Filter Sets Edge Filter Sets Mercury Line Filter Set, UV Mercury Line Set, UV/NIR Mercury Line Set, UV/VIS/NIR Near Infrared Sets Neutral Density Filter Sets Standard Filter Sets Ultraviolet Filter Sets Visible Sets 1/4/8nm User-Defined Filter Sets Zinc Cadmium Filter Set Filter Wheels Fused Silica Windows G General/Technical Information Germainum Windows Glass Filter Glass Infrared WIndows and Substrates Glossary H Heat Control Filters Cold Mirrors Hot Mirrors Infrared Suppression Ultraviolet Cold Mirror I Image Quality Filters Infrared Suppression Filter Infrared Antireflective Coatings Infrared Bandpass Filters Infarared Long and Short Pass Filters Interference Filters (Bandpass) Infrared Near Infrared Ultraviolet Filters Visible Interference Filters (Cut-On, Cut-Off) Infrared Long and Short Pass Near Infrared Long and Short Pass Visible Long Wave Pass Visible Short Wave Pass Interference Filter Sets Dichroic Filter Sets Edge Filter Sets Standard Filter Sets User-Defined Sets International Representatives L Long Wave Pass (Dielectric) Visible Long Wave Pass Near Infrared Long Wave Pass Infrared Long Wave Pass Long Wave Pass (Filter Glass) Questions? techstaff@andovercorp.com Index 71

74 Index M Mercury Line Filter Sets Metallic Neutral Density Filters Ultraviolet/Visible/Near Infrared Visible/Near Infrared Metallic Neutral Density Filter Sets Mirrors Cold Mirror (Heat Transmitting) Hot Mirrors (Heat Reflecting) Infrared Suppression Ultraviolet Cold Mirror N Narrow Band Interference Filters Near Infrared Filter Sets Near Infrared Interference Filters (Semi-Custom) Near Infrared Interference Filters (Standard) Near Infrared Long Wave Pass Filters Near Infrared Short Wave Pass Filters Near Infrared Suppressors Nebula Filters Neutral Density Filters Absorption Metallic Coated (UV-VIS-NIR) Metallic Coated (IR) Neutral Density Filter Sets Absorption Metallic Coated (UV-VIS-NIR) Metallic Coated (IR) O Optical Fabrication and Polishing Optical Interference Filters Bandpass (UV-VIS-NIR) Bandpass (IR) Dichroics Heat Control (Hot/Cold Mirrors) Image Quality Infrared Long Wave and Short Wave (UV-VIS-NIR) Long Wave and Short Wave (IR) Ordering Information P Polishing and Fabrication R Red Dichroic Filter Reflective Filter (Blue) Reflective Filter (Red) S Sapphire Windows Schott Filter Glass Semi-Custom Bandpass Filters Sharp Cut Filters (LWP/SWP) Sharp Cut Glass Short Wave Pass Filters Silicon Windows Spectrophotometer Calibration Filters Standard Bandpass Filters Standard Filter Sets Storage Cases, Wooden Substrates, Infrared T Temperature Controllers Temperature Coefficient Chart U UBVRI Filters Ultraviolet Cold Mirror Ultraviolet Filter Sets Ultraviolet Interference Filters (Semi-Custom) Ultraviolet Interference Filters (Standard) Universal Oven Controller User-Defined Filter Sets V Variable Bandpass Filter Sets,Visible/Near Infrared 44 Visible Beamsplitters Visible Interference Filters (Semi-Custom) Visible Interference Filters (Standard) Visible Interference Filter Sets (Standard) Visible Interference Filter Sets (User-Defined) W Wavelength Shift With Angle of Incidence Wavelength Shift With Temperature Windows, Infrared-Transmitting Wooden Filter Cases Z Zinc and Cadmium Filter Sets Zinc Selenide Windows Catalog rev: P Andover Corporation Order online: Call toll-free in the US:

75 Andover Corporation Find us online at Andover Corporation was established in 1976 with the purpose of designing and manufacturing high-quality optical filters and coatings. Over the years as the company has grown, the focus has remained on quality. Our current facility spans 44, square feet on 17 acres of land in Salem, NH. Our facility is custom-designed and state-of-the-art, and includes automated coating, glass polishing, and fabrication equipment. Our testing capabilities are extensive, including both automated spectrophotometers for broadband spectral measurements, and ultrahigh-resolution spectrophotometers for narrowband measurements. Our optical metrology lab features a custom-designed, computer-controlled 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, space-borne systems and defense systems.