Black Diamond Infrared Lenses 38

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1 Product Catalog

2 LightPath Technologies Page Company Overview 2 Markets Served 3 LightPath s Capabilities 4 Custom Engineering 5 LightPath s Technology Portfolio 6 Geltech Aspheric Lenses 6 Molded Glass Lens Arrays 6 Tx Asphere Wafer-Based Molded Optics 6 Black Diamond Infrared Lenses 7 Imaging and Optical Assemblies 7 GRADIUM Lenses 7 RoHS Compliant Optical Isolators 7 Geltech Aspheric Lenses 8 Technical Information 8 Standard Glasses 10 Standard Anti-Refl ective Coatings 11 Choosing the Right Aspheric Lens 12 Aspheric Lens Selection Guide 13 Aspheric Lens Product Numbers & Specifi cations 15 Blue Laser Collimating Lens 32 Glass Aspheres for Laser Tools 33 Asphere Customization Capabilities 34 Mounted Aspheric Lenses 35 Connectorized Aspheric Fiber Optic Collimators 36 Black Diamond Infrared Lenses 38 Mid to Long Wavelength Infrared Aspheres 38 Black Diamond Infrared Glass Data (BD-2) 39 Available Coatings for BD-2 Infrared Lenses 40 MWIR & LWIR Collimating Lenses 41 Black Diamond Thermal Imaging Lens Assemblies 42 GRADIUM Lenses Challenger Tech Court Suite 100 Orlando, Florida Phone: Toll Free: Fax: Technical Information 43 GRADIUM Lens Product Numbers & Specifi cations 45 Standard & Available Coatings 46 Optical Isolators 47 Optical Isolator Capabilities 47 Tx Isolators 48 Oasis Monolithic Isolator and Aspheric Lens 48

3 Company Overview Overview LightPath is a recognized leader in optical solutions for industrial, defense, communications, test and measurement, and medical applications. For over 20 years, LightPath has built a strong portfolio of optical components and technologies that serve these industries. These products include molded glass aspheric lenses, optical isolators, fused fi ber collimators, and gradient index GRADIUM lenses. LightPath began in 1985 with the invention of GRADIUM glass, an axial gradient index glass that is used to make high performance, cost effective lenses for high power laser systems. As this breakthrough technology gained greater market acceptance in industrial applications, Lightpath grew from just a few employees to well over 100. In 1996, LightPath completed its initial public offering (IPO) and joined the NASDAQ (symbol: LPTH). In 2000, Lightpath leveraged these new resources to acquire two new companies, Geltech, Inc. and Horizon Photonics. Geltech added the capability to mold high quality glass aspheric lenses and Horizon Photonics brought a product line of optical isolators as well as expertise in automation. LightPath combined these new capabilities with its own technologies, bringing a wealth of expertise to solving complex optical problems for the entire optics industry. Our customer base is very diverse with applications that include laser welding & cutting, military laser tag, data communications, bar code scanning, particle measurement, medical endoscopes, telecom multiplexers, and many other optical application areas. We pride ourselves on high performance, customer support, quality products, value added designs and cost effective volume manufacturing. 200 nm 385 nm Optical Products We Produce Pro- Collimators GRADIUM Aspheres 500 nm Black Diamond Infrared Aspheres 2.0 μm 14 μm The products we produce include a wide spectrum of molded glass aspheric optics ranging in size from 0.25 mm to 25 mm. GRADIUM lenses, which give the performance of an asphere, are available between 5 mm and 100 mm. LightPath also offers a full range of optical isolators for communications applications. LightPath also offers the ability to combine optical elements into a complete assembly, providing full engineering support for both optics and mechanics. LightPath uses an integrated approach; our optical and mechanical engineers work directly with our customers on their optical system requirements. This enables the fi nished application to obtain the highest level of optical integration, minimizing time, size and cost while ensuring quality, performance and manufacturability. With LightPath s automation capabilities, when your product is ready for full production we are ready to take you there. Facilities LightPath currently operates two facilities, our Corporate Headquarters based in the Research Park at the University of Central Florida in Orlando, Florida and a high volume production facility located in Shanghai, China. LightPath Quality At LightPath Technologies, we work very hard to make quality and customer satisfaction our top priorities. Our product quality is our fi rst priority for our customers. We value your business, and it is our goal to provide competitively priced, top quality products that satisfy our customer s technical and time to market requirements. Our Corporate Headquarters in Orlando has 22,000 square feet (2,044 m²) of space including 8,000 square feet (743 m²) of class 10,000 production fl oor for automated manufacturing. LightPath s facility also maintains a class 100 clean room for high performance projects, a precision machine shop with single point diamond turning capabilities for quick turn prototypes and complete metrology labs. Our second manufacturing facility in Shanghai, China has 17,000 square feet (1,580 m²) and over 5,000 square feet (465 m²) of clean room. LightPath s Shanghai facility is wholly owned and is fully integrated into LightPath s production and quality inspection programs. LightPath s incoming and fi nal inspection groups are comprised of experienced personnel with an average experience of over fi ve years per inspector. A range of environmental chambers are available inhouse and used for reliability testing for Telcordia and other MIL standards in order to meet product qualifi cation requirements. LightPath is an ISO 9001 certifi ed supplier. IS O SYSTEM CERTIFICATION 9001:

4 Markets Served Industrial Many of the worlds top automobile manufacturers use LightPath s GRADIUM lenses and lens systems to focus their Nd: YAG lasers or fi ber lasers for automated welding and cutting operations. Molded glass aspheres are used by the major shippers worldwide in barcode scanning and package handling systems. The top computer-toprint manufacturers use our aspheric molded optics for unmatched performance. Overview Medical When optimal performance is paramount, glass aspherical lenses are used for medical imaging systems and procedures requiring laser cutting and healing. GRADIUM lenses and molded glass aspheres are found in many analytical instruments measuring different body functions in both the operating room and the lab. LightPath also provides lenses to the world s top manufacturers of endoscopes, providing a very wide fi eld of view in a very small lens. We work with many companies in biotechnology developing new optics and optical systems in the fi elds of genetics, DNA, and protein analysis. Defense & Government Over the last 10 years, LightPath has provided large volumes of lenses to defense contractors for many simulation training programs, which train our armed forces using lasers instead of bullets. Smart bombs and munitions utilize aspheres for communication and distance measurement. Under a development contract with the U.S. government, LightPath developed radiation hardened aspheres that are currently being used for satellite communication in both the military and commercial market. Specialty glass optical systems have also developed for eye and instrument protection against damaging laser beams. Communications LightPath products have developed for a variety of communications applications in both Telecom and Datacom. Our lenses, collimators and isolators are used to maximize light effi ciency while minimizing both size and cost. Applications including mux/demux, switching and routing, amplifi cation, dispersion compensation, sensing, transmitters, receivers and transponders all require the products and performance LightPath provides to move the light on and off the fi ber. Metrology & Instrumentation LightPath s optical components are employed in a variety of optical measurement systems and optical sensors including applications ranging from simple laser levels to highly complex spectroscopic sensors. Instrumentation manufacturers utilize LightPath s custom molding capabilities to produce optimized lenses or choose an appropriate product from our catalog s large lens selection. LightPath s integrated solutions provide compact sub-assemblies with a reduced number of optical components and lower cost to manufacturers that prefer not to handle optical components. 3

5 LightPath s Capabilities Overview Most optical systems require specifi cally designed optical elements to achieve optimum performance. LightPath is committed to manufacturing optical components that are designed to be the perfect fi t for your specifi c application. LightPath has developed an in-house capability to quickly design, engineer and manufacture custom optical components to your individual specifi cations. Custom design and manufacturing begins with the customer s basic requirements. LightPath s custom design team will work with our customers and their specifi cations in order to produce a product that meets the requirements and is cost effective to manufacture. Production Ramp-Up High Volume Business Life Cycle Prototypes Design Hard tooling complete Production at LightPath s China high volume manufacturing facility Discussions begin on improvements for next generation designs Prototypes have now customer qualifi ed Hard tooling begins Transition to LightPath s China high volume production facility begins Delivery of prototypes in as little as 4 weeks from beginning of design Customer evaluates lenses before volume production begins Soft tooling is now completed LightPath s in-house optical design staff can design lens or co-design with customer Design package goes through customer approval process Vertically integrated for raw materials and tooling fabrication LightPath s unique capabilities allow for a partnership through the entire business life cycle of your product. LightPath provides quick turn around on the initial design and prototypes. As volume grows, LightPath can help transition your optics from the design and prototyping stages through the ramp-up to full high volume production. 4

6 Custom Engineered Integrated Optical Systems and Assemblies Complete opto-mechanical design services Engineered to your requirements Prototype to full manufacturing capability Full NIST traceable test and metrology Commercial optical sub-assemblies Defense optical systems ITAR Compliant Opto-Mechanical Design By utilizing more than 20 years of optical component design and manufacturing experience, LightPath can provide you with a complete optical solution. Understanding what it takes to build components and understanding manufacturing tolerances can make the difference between success and failure. LightPath provides a team of product specialists, optical design engineers and production engineers to review your requirements and provide feedback on how to most effectively manufacture your lenses. This process will help us understand your requirements and provide you with the most cost effective, high performance solution. Utilizing our in-house source of innovative products such as molded glass aspherics, infrared aspherics, GRADIUM optics, and patented fi ber fusion, you no longer have to worry about searching to fi nd solutions. If your design calls for cost effective aspheric elements, we can manufacture them in-house and typically in half the time it takes elsewhere. Our engineers work with state of the art optical and mechanical tools, such as Zemax, Oslo, Code V, and ASAP for optical design, modeling and simulation. Mechanical and complex thermal analysis is done with SolidWorks, Pro/Engineer, and COSMOS. Other simulations, such as diffractive and stray light analysis, can be performed and data provided to the customer throughout the design phase of a custom component or assembly. From start to fi nish LightPath provides you with the required expertise to produce the highest quality optical components! When it comes to designing optical systems, it takes more than a computer to make it right. Vertically Integrated Design & Manufacturing LightPath s vertically integrated engineering staff and two production facilities allow us to quickly design and manufacture all required production tooling and enables quick turn prototype optical components. LightPath s lens molding equipment is designed and developed by our own engineers to provide a fl exible, highly scalable press molding technology that complements our in-house diamond turning machines for high quality mold production. We also have invested in signifi cant machining equipment for fast production of metal lens holders and similar machined parts. Finally, all products are fully inspected to meet LightPath s quality standards. Volume Manufacturing LightPath s manufacturing facilities are able to grow with your production requirements. Prototypes and low volume production quantities are quickly produced with low-cost, soft mold tooling. At higher volumes, hard tooling is used to provide longer lifetime molds for cost effective production. LightPath s two facilities allow for fl exible scheduling of your production needs. Fast turn around and ITAR compliant projects are performed at our Orlando facility. Higher volume projects are run at LightPath s wholly owned facility in China for maximum cost reduction while maintaining LightPath s high quality standards. ITAR Compliance LightPath is fully equipped to handle ITAR compliant projects. Our Engineering and Production Facility in Orlando is ITAR registered and routinely handles ITAR restricted projects. Contact us for more information about ITAR projects. Overview ITAR DTC Code Contact LightPath today to discuss how we can help you with your application. 5

7 LightPath s Technology Portfolio Geltech Aspheric Lenses Overview For aspheric lenses, we can complete new designs and provide prototypes in a matter of weeks while keeping development costs among the lowest in the industry. LightPath has developed a fully qualifi ed molded glass catalog that covers most design needs. The glasses in our standard catalog have fully qualifi ed with our process and will provide the most cost effective lenses and enable the fastest turnaround times. AR coatings for these glasses have also designed, tested and qualifi ed. Our standard glass catalog includes: D-ZK3 - high volume RoHS compliant glass LightPath's Typical Aspheric Manufacturing Tolerances* D-ZLaF52LA - higher index RoHS compliant glass ECO LightPath s exclusive RoHS compliant glass Black Diamond infrared glass (BD-2) for thermal imaging and other IR applications PBH71 for lenses requiring high index Radiation hardened glasses for space applications Parameter Commercial (standard) Precision ± mm ± mm ± mm ± mm Wedge (arcmin) 4 2 Power/Irregularity (fringes) 3/1 1/0.5 Surface Roughness 15 nm 5 nm Surface Quality (scratch/dig) 40/20 20/10 *Manufacturability depends on size & shape of the optics, as well as production volume. Most moldable glasses from Corning, Schott, Sumita, & CDGM can be used with LightPath's molding process. Contact us to discuss lens designs using any of these moldable glasses. Molded Glass Lens Arrays By utilizing LightPath s molded lens technology it is now possible to manufacture lens arrays with high precision. Unlike etched lens arrays, where there is a great deal of non-uniformity from array to array, molding will consistently produce the same structure and performance from prototype to large production builds. Consistent focal lengths and form ease the manufacturing requirement for the end user. The molding technology also allows optical designs that require greater sag (lens thickness) such as high numerical aperture collimators for laser diode arrays. Lens arrays can be produced for direct coupling (fi nite conjugative) or collimating applications. Pitch tolerances are typically less than one micron and lenses can also be placed with varying pitches across the array. Tx Asphere Wafer-Based Molded Optics Designed and manufactured for today s high performance transmitters, Tx Aspheric lenses utilize LightPath s proprietary wafer-scale glass manufacturing techniques, delivering performance, size and price. By molding an entire wafer of lenses at one time and then dicing them individually, production cost is signifi cantly reduced over single lens molding. The dicing operation results in a square form factor lens that can make mounting easier. All lenses are 100% inspected, tested, and AR coated. 6

8 Black Diamond Infrared Lenses LightPath s Technology Portfolio LightPath s Black Diamond lenses are infrared lenses manufactured from moldable chalcogenide glass. LightPath's BD-2 glass can be customized for applications between 1 micron and 14 microns in wavelength, opening up new applications in thermal imaging and smart sensors. Black Diamond Manufacturing Tolerances* Parameter Typical Value ± mm Diameter ± mm Wedge 4 arcmin Power/Irregularity 3/1 fringes at 633 nm Roughness 15 nm Refractive Index ± * Manufacturability depends on size and shape of the optics, as well as production volume. Overview Imaging and Optical Assemblies By leveraging our broad optical component portfolio, LightPath has a track record for implementing sophisticated integrated optical assemblies. Our in-house engineering staff can design custom assemblies, including complex imaging systems for camera systems, to your exact specifi cations. Additional services include thermal analysis and athermalization for better performance across a large temperature range. GRADIUM Lenses Ideal for high power applications, GRADIUM lenses and their gradient-index structure often allow a GRADIUM singlet to replace a conventional spherical doublet. GRADIUM lenses can be custom designed for visible or near infrared applications in diameters from 5 mm to over 100 mm. GRADIUM doublets are also available for better achromatic performance and can equal the performance of conventional triplets. RoHS Compliant Optical Isolators LightPath s RoHS compliant isolators can be customized for telecom wavelength ranges in single, one and a half, and two stage compositions. LightPath produces simpler latched isolator confi gurations, robust isolator designs for long haul and undersea applications with bases and magnets using automated processes and epoxy free isolator assemblies. A variety of different housings are also available to make integrating to the customer s package easy. Oasis Isolators LightPath offers Oasis integrated isolators. These isolators are a combination of an aspheric lens and an optical isolator. Oasis isolators reduce the number of parts in a system and allow easier assembly and alignment. 7

9 Geltech Aspheric Lenses High quality optical glass lenses Custom designs available Numerical aperture up to 0.83 Diameters from mm to 25.0 mm Diffraction-limited performance Available in standard and custom housings For today s sophisticated and compact laser systems, aspheres are the most powerful lenses for managing laser light. In these systems, spherical aberration is the most prevalent performance detractor. It arises from the use of spherical surfaces and artifi cially limits focusing and collimating accuracy. Although it has known for centuries that spherical geometry is not optimal for refracting light, the expense of fabricating nonspherical (aspheric) surfaces has inhibited their use. With the breakthrough of LightPath s glass molding technology, this optimal lens geometry has become a reality. Spherical vs Aspherical Lens Systems Spherical System Aspheric Lens Working Distance Center Thickness Aspheres provide elegant single-element simplicity Molded lenses are used in a variety of photonics products: barcode scanners, laser diode to fi ber couplings, optical data storage, and medical lasers, to name a few. In many of these applications, the material of choice is optical glass because of its durability and performance stability over a wide environmental range. High power transmittance is also an added advantage. Laser Window Edge Thickness Clear Aperture Outer Diameter The benefi ts of glass molding technology become apparent when traditional methods of grinding and polishing become cost-prohibitive. The direct molding process eliminates the need for any grinding or polishing, offering aspheric lenses at practical prices for system designers. Molding is the most consistent and economical way to produce aspheres in large volumes. Small and lightweight, our aspheres collimate or focus light as a single element. This means less complex systems, fewer alignment requirements, less re-work and shorter assembly time. Our aspheres are molded; therefore the lenses have excellent piece-to-piece uniformity. They are made of glass, which is the most durable optical material available, capable of withstanding repeated cleaning and performing at specifi cation despite extreme temperature and moisture variations. Guaranteed Performance LightPath s aspheric lenses are inspected and optically tested to ensure complete customer satisfaction. Visual cosmetic inspection is preformed on 100% of all lenses per MIL-PRF-13830B with a scratch/dig spec of 40/20. Other inspection criteria including 80/40 and 20/10 can be provided upon request. Typical Tolerances ± mm ± mm Effective Focal Length (EFL) ± 1% Working Distance (WD) ± 1% of EFL Optical performance is guaranteed by test methods utilizing mm interferometer measuring transmitted RMS wavefront error listed in the individual lens specifi cation. LightPath can also perform customized optical tests in order to screen for specifi c application criteria. 8

10 Geltech Aspheric Lenses Optical Performance The primary optical specifi cation is the root-mean-squared transmitted wavefront error (RMS WFE). It is measured on a phase shift interferometer at the wavelength of nm. Most of our lenses are guaranteed to be diffraction limited, which means the RMS WFE < λ at the design wavelength. Numerical Aperture Our molded aspheric lenses are available with numerical apertures ranging from 0.15 up to Lower NAs are best when a large depth of focus is important or when you need nearly circular beams. Examples of applications that would use a low numerical aperture are bar code scanners, surveying instruments, and small weapons sights. High numerical aperture lenses are important when you need to focus light down to a small spot size or when you need the maximum light capture from a diode laser. High numerical aperture applications include data storage and industrial printing. Lens Holders Several of our catalog lenses are available pre-mounted in metal holders. Using our unique Mold-In-Place (MIP) technology, we can actually mold the lens directly inside of a steel holder, eliminating the need for adhesives in your package. We can epoxy our lenses into Stainless Steel or Kovar mounts so you can weld them directly into your system. Shapes and Sizes LightPath aspheric lenses are typically plano-convex or bi-convex, with diameters as large as 25 mm or as small as mm. LightPath has the capability to dice the lenses to specifi ed shapes for easier mounting. Custom Aspheres Our catalog details 53 standard types of available aspheric lenses. If you do not see a lens that fi ts your particular application, we would be happy to design one for you. Our sales and engineering teams work closely together to assist you in design, prototyping, and production of custom glass aspheric lenses. LightPath offers custom lens solutions for high volume manufacturing at prices equal to those of standard off-the-shelf lenses. We pride ourselves on being the fastest custom lens designers in the industry. When determining specifi cations for custom aspheric lenses, the following parameters are typically used to specify lens performance. A LightPath product expert would be happy to discuss the following list of parameters with you to determine the appropriate lens for your application. Custom Asphere Specifi cations Diffractive Hybrid Lenses By combining a refractive aspheric lens with a diffractive feature on one surface, you can do sophisticated beam shaping on your laser light. You can also use diffractive hybrid lenses to make your system achromatic over a range of wavelengths. LightPath hybrid lenses are custom designed to each particular application. See page 34. Wavelength Used Numerical Aperture (NA) Effective Focal Length (EFL) Minimum Clear Aperture Minimum Back Focal Length Mechanical Space Constraints microns mm mm mm Application notes for choosing the right aspheric lens are also available online. Please see technicalpapers.php for more details. 9

11 Geltech Aspheric Lenses Standard Glasses LightPath Technologies manufactures aspheric lenses using several different types of glass. These glasses have fully qualifi ed, along with the corresponding AR coating. Transmittance of all fi ve glasses is very good over a large wavelength spectrum. Lens Code Glass Type Refractive Index Abbe Number CTE dn/dt Equivalent Glasses RoHS Compliance 350xxx C ν d = x 10-6 / C -11 x 10-6 / C Corning BCD-C2060 & Schott SK16 X 352xxx ECO ν d = x 10-6 / C 2.39 x 10-6 / C N/A 354xxx D-ZK ν d = x 10-6 / C 3.2 x 10-6 / C Hoya M-BACD5N & Ohara L-BAL35 355xxx D-ZLaF52LA ν d = x 10-6 / C 6.5 x 10-6 / C Ohara L-LAH53, Hoya M-NBFD130, Sumita K-VC89 370xxx PBH ν d = x 10-6 / C 13.1 x 10-6 / C Schott SF66, Hoya FDS1, Sumita PSFN5 X D-ZLAF52LA 355xxx Series of Lenses This glass has a higher index of refraction than ECO-550 and is best suited for those applications that require a higher index and need to maintain RoHS compliance. D-ZK3 354xxx Series of Lenses This glass is best suited for those applications that require a low cost glass for higher volume manufacturing. ECO xxx Series of Lenses New European (RoHS) and Japanese environmental regulations have restricted the use of lead and other hazardous substances in optical components. ECO-550 is an environmentally friendly alternative to conventional moldable glasses. It has similar optical properties to C-0550, but does not contain hazardous materials. C xxx Series of Lenses Corning developed a special glass to allow production of highly sophisticated aspheric lenses that are cost effective. The code for this glass is C-0550, and its low dispersion (ν d = 50.40) is key for many applications. In durability, it is equivalent to Corning BCD C2060 or Schott SK16. Due to limited availability, this glass should only be used for special projects that require its unique properties. PBH71 370xxx Series of Lenses For aspheric lenses that require a glass with a higher index of refraction, LightPath also offers lenses made from Ohara PBH71 glass. Its high index (n d = ) allows designers to minimize aberrations in lenses with high numerical apertures. It has the added benefi t of a lower coeffi cient of thermal expansion. Standard Glass Internal Transmission Curves (5 mm thickness) LightPath s capabilities include most high volume moldable glasses from Corning, Schott, Sumita, and CDGM. 10

12 Geltech Aspheric Lenses Standard Anti-Reflective Coatings LightPath offers a variety of multilayer broadband coatings to reduce the back refl ection from a nominal 6% for uncoated lenses. The choice of which AR coating is appropriate depends on the type of glass the lens is made from and the wavelength at which the lens will be used. Standard Coatings Lens Series Coating λ Range (μm) R MAX 352xxx, 354xxx, 355xxx MLBB-A < 1.0% 352xxx, 354xxx, 355xxx MLBB-B < 1.0% 352xxx, 354xxx, 355xxx MLBB-C < 1.0% 352xxx, 354xxx, 355xxx MLBB-M < 2.0% 370xxx MLBB-Q < 0.25% Available Coatings Lens Series Coating λ Range (μm) R MAX 352xxx MLBB-D < 0.25% 352xxx MLBB-E < 0.50% 370xxx MLBB-O < 1.0% 370xxx MLBB-P < 1.0% LightPath s rigorous qualifi cation process ensures that all of the standard coatings will pass the abrasion and adhesion resistance requirements of ISO LightPath is happy to provide any AR coatings based on specific requirements. A Coating Reflectance (%) B Coating Reflectance (%) Typical AR Coating Curves C Coating Reflectance (%) Wavelength (nm) M Coating Reflectance (%) NOTE: Coating specifi cation λ range = 600 μm μm. Wavelength (nm) NOTE: Coating specifi cation λ range = 1050 μm μm Wavelength (nm) Wavelength (nm) Q Coating 1.0 Reflectance (%) Wavelength (nm) 11

13 Choosing Geltech the Aspheric Right Aspheric LensesLens For Diode Collimation One of the most common uses for aspheric lenses is in the collimation of edge emitting diode lasers. With over 35 standard lenses in LightPath s catalog to choose from, however, this can sometimes be a confusing task. The guide below will clear up some of the questions about choosing the best lens to use with a specifi c laser for a particular application. Due to the way that the laser cavity is constructed in edge emitting diode lasers, light is emitted in a diverging, elliptical geometry - so the divergence is typically specifi ed in both the x and y axes separately. The axis with the larger divergence is called the fast axis and the axis with the smaller divergence is called the slow axis. When selecting a lens to collimate the laser, fi rst consider the Numerical Aperture of the lens. If the application requires a high amount of the laser light to be coupled though the system, a lens with a high enough NA must be chosen. The NA of a lens is a measure of the maximum amount of divergence that the lens can capture from the laser. Ideally, a lens should be used that has an NA higher than the NA of the laser s fast axis. If not, the laser will clip the lens causing some of the light to be wasted. To convert the laser NA to the divergence angle (and vice-versa), use this formula: NA = n sin (φ) In most cases, n = 1 since the NA of the laser is defi ned in air Therefore, solving for the equation is simplifi ed to: φ = sin - ¹ (NA) It is important to note that φ is the half angle of the divergence cone and is given at the marginal ray (not 1/e² or half angle half max). After the minimum NA necessary for the lens is determined, next consider what beam diameter is preferred. Although ray-tracing is necessary to precisely determine the beam diameter for a given NA source with a particular lens, it can be approximated with the following formula: Beam Diameter 2 EFL NA where EFL is the effective focal length of the lens and NA is the numerical aperture of the source (not the NA of the lens). Important Note: Some laser manufacturers give the NA of the source in different terms, such as half max (50% point) or 1/e² (87% point). Whatever type of number is entered into the formula for the NA of the source will be the same type of number given for the beam diameter. For example, if the half max NA for a laser is used with the above formula, you will get the half max beam diameter. There is no simple way to convert from a half max number or a 1/e² beam diameter to a full beam diameter for a specifi c source because it depends on the intensity profi le of the source itself. A reasonable approximation, though, for most edge emitting diode lasers is to assume a Gaussian beam profi le. Using this beam profi le, you can convert the beam diameters as follows: 1. To convert a half max beam diameter to a full beam diameter, multiply the diameter by To convert a 1/e² beam diameter to a full beam diameter, multiply the diameter by Remember that most edge emitting diodes are elliptical, so the beam diameter will be different in the x-axis versus the y-axis. Use the formula above to calculate the beam diameter in both axes to determine the shape of the collimated, elliptical beam. For Fiber Coupling Another common use for aspheric lenses is to couple laser light into optical fi bers. Choosing the right lens or lenses to do the coupling is important to maintain high effi ciency in the optical system. The guide below is intended to show how best to do this while using off-theshelf components. This guide assumes that the input laser light has already collimated (not diverging). When selecting a lens to focus light into a fi ber, fi rst consider what focal length lens is needed. Let s revisit the formula given previously: Solving for EFL it becomes: Beam Diameter 2 EFL NA EFL Beam Diameter 2 NA where NA is the numerical aperture of the fi ber that is used for the coupling. It is important to note that the EFL value that is calculated above is the minimum EFL needed to couple the light completely into the fi ber. Longer EFL lenses can be used, but the spot size on the fi ber tip will become larger. Therefore, it is best practice to use the shortest EFL lens possible that is larger than the minimum value specifi ed above. 12

14 Geltech Aspheric Lenses Standard Lenses Laser Diode Collimating Lenses Lens Code NA EFL (mm) CA (mm) OD (mm) / / / / A A A / / / / Lens Code NA EFL (mm) CA (mm) OD (mm) Window Thickness (mm) none none none A A A none none none none none none none none Lens Code Laser to Fiber Coupling Lens NA (object) NA (image) MAG EFL (mm) OD (mm)

15 Geltech Aspheric Lenses Fiber Collimating/Coupling Lenses Fiber to Fiber Coupling Lens Fiber Collimating FIBER FIBER Fiber Coupling Lens Code NA EFL (mm) CA (mm) OD (mm) Lens Code NA (object) NA (image) MAG EFL (mm) OD (mm) Lens Code Data Storage Objective Lenses NA EFL (mm) CA (mm) OD (mm) Media Thickness (mm) Geltech Aspheric Lens Selection Guide Numerical Aperture (NA) Focal Length (mm) A A A

16 Geltech Aspheric Lenses Lens Codes and Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has nm Ø 3.82 Numerical Aperture (NA) mm replaced 4.20 with mm our Ø Effective Focal Length (EFL) 4.47 mm 4.47 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement 5.42 mm 5.42 mm Working Distance (WD) 3.08 mm lens code mm is Ø mm 3.44 mm Laser Window Thickness 1.20 mm mm Laser Window Material/Index Polycarbonate / Polycarbonate / Focus light into an optical disk Moderate NA for good light capture; small focused spot. Optical data storage systems. Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens has nm Numerical Aperture (NA) mm replaced 4.29 with mm our Effective Focal Length (EFL) 3.89 mm 3.89 mm RoHS compliant glass. Magnifi cation Infi nite Infinite nite Ø RMS WFE Diffraction Limited The Diffraction replacement Limited it Ø mm mm Working Distance (WD) mm lens 1.50 code mm is Ø mm 3.07 mm Laser Window Thickness 1.20 mm mm Laser Window Material/Index Polycarbonate / Polycarbonate / Focus light into an optical disk High NA for maximum light capture; small focused spot. Optical data storage systems A AR Coating nm B C AR Coating nm A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Code Drawing Parameter RoHS Ø Ø Ø 5.00 Optical Glass Material ECO nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 5.5 mm Magnifi cation Infi nite RMS WFE Diffraction Limited 7.20 mm Working Distance (WD) mm 3.55 mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light at high magnifi cation from a laser diode. High NA for maximum light capture; large CA and long focal length for minimum beam divergence. General purpose laser diode collimation A AR Coating nm B C AR Coating nm 15

17 Geltech Aspheric Lenses Lens Codes and Lens Code Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens has nm Numerical Aperture (NA) mm replaced 5.00 with mm our Ø 5.87 Ø 4.40 Effective Focal Length (EFL) 6.24 mm 6.24 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement 7.20 mm 7.20 mm Working Distance (WD) mm lens 3.45 code mm is Ø mm 5.36 mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode Moderate NA for good light capture; large CA for minimum beam divergence. Presentation pointers, small weapons sights, survey instruments, alignment instruments, hand held and fi xed barcode scanners, medical instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Drawing Parameter RoHS Ø Ø Ø 5.80 Optical Glass Material ECO nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 6.75 mm Magnifi cation Infi nite RMS WFE Diffraction Limited 9.20 mm Working Distance (WD) mm 4.00 mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light at high magnifi cation from a laser diode. High NA for maximum light capture; large CA and long focal length for minimum beam divergence. General purpose laser diode collimation A AR Coating nm B C AR Coating nm Lens Code Drawing Parameter RoHS Optical Glass Material ECO nm Numerical Aperture (NA) mm Effective Focal Length (EFL) mm Magnifi cation Infi nite RMS WFE Diffraction Limited mm Ø Ø Ø 9.91 Working Distance (WD) mm 4.00 mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light at high magnifi cation from a laser diode High NA for maximum light capture; large CA and long focal length for minimum beam divergence. General purpose laser diode collimation A AR Coating nm B C AR Coating nm 16

18 Geltech Aspheric Lenses Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has nm Numerical Aperture (NA) 0.55 replaced with our 1.60 mm 1.60 mm Effective Focal Length (EFL) 1.45 mm RoHS compliant 1.45 mm glass. Magnifi cation Infi nite The replacement Infinite nite RMS WFE Diffraction Limited Diffraction Limited Ø Ø 1.77 Ø mm lens 2.40 code mm is Working Distance (WD) 0.88 mm mm 1.00 mm 1.01 mm 1.00 Lens Codes and Collimate or focus laser light. High NA for maximum light capture; small physical size. Fiber to fi ber coupling applications when use with another lens or in pairs A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has Numerical Aperture (NA) mm replaced 2.0 mm with our Effective Focal Length (EFL) 2.00 mm 2.00 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The io replacement 3.00 mm 3.00 mm Ø Ø 2.34 Ø 1.90 Working Distance (WD) 1.09 mm lens 1.09 code mm is 2.0 mm 2.00 mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode High NA for maximum light capture; small physical size Presentation pointers, small weapons sights, survey instruments, alignment instruments, hand held and fi xed barcode scanners, medical instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has nm Numerical Aperture (NA) mm replaced 3.70 with mm our Effective Focal Length (EFL) 6.16 mm 6.16 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement Ø mm 4.70 mm Ø 3.40 Working Distance (WD) 4.38 mm lens 4.37 code mm is Ø mm 3.48 mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode. Low NA for clean circular beam; moderate physical size. Industrial barcode readers, point-of-purchase barcode readers, laser printers, laser fax machines, survey instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm 17

19 Geltech Aspheric Lenses Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 633 has nm Numerical Aperture (NA) mm replaced 5.50 with mm our Effective Focal Length (EFL) mm mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement Ø mm 7.20 mm Working Distance (WD) 7.97 mm lens code mm is Ø mm 5.00 mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode Low NA for clean circular beam; large CA for minimum beam divergence. Lens Codes and Industrial bar code readers, point-of-purchase barcode readers, laser printers, laser fax machines, survey instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has nm Numerical Aperture (NA) mm replaced 4.95 with mm our Effective Focal Length (EFL) 4.51 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement Ø mm mm Ø 4.50 Working Distance (WD) 2.92 mm lens 2.91 code mm is Ø mm 2.94 mm Laser Window Thickness 0.25 mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode. High NA for maximum light capture; large CA for minimum beam divergence Presentation pointers, small weapons sights, survey instruments, alignment instruments, hand held and fi xed barcode scanners, medical instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has nm Numerical Aperture (NA) mm replaced 8.00 with mm ih our Effective Focal Length (EFL) 8.00 mm 8.00 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. Ø 8.62 RMS WFE Diffraction Limited The replacement mm mm Ø Ø 8.68 Working Distance (WD) mm lens code mm is 3.69 mm 3.69 mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode High NA for maximum light capture; large CA and long focal length for minimum beam divergence. Telecommunications A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm 18

20 Geltech Aspheric Lenses Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has nm Numerical Aperture (NA) mm replaced 5.00 with mm our Effective Focal Length (EFL) mm mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. Ø 5.38 RMS WFE Diffraction Limited The replacement 6.50 mm 6.50 mm Working Distance (WD) mm lens code is 2.20 mm 2.20 mm Ø Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode Low NA for clean circular beam; large CA for minimum beam divergence. Industrial barcode readers, point-of-purchase barcode readers, laser printers, laser fax machines, survey instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 780 has nm Numerical Aperture (NA) mm replaced 5.50 with mm our Effective Focal Length (EFL) mm mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement 6.50 mm 6.50 mm Ø 5.84 Working Distance (WD) mm lens 10 code is Ø mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Industrial barcode readers, point-of-purchase barcode readers, laser printers, laser fax machines, survey instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 830 has nm Numerical Aperture (NA) 0.68 replaced 0.68 with our 5.00 mm RoHS compliant 5.00 mm glass. Effective Focal Length (EFL) 3.10 mm 3.10 mm Magnifi cation Infi nite The replacement Infinite nite mm lens code mm is Ø Ø 5.04 Ø 4.17 Working Distance (WD) 1.76 mm mm 3.18 mm 3.19 mm Collimate or focus laser light. High NA for maximum light capture; large CA for minimum beam convergence. Fiber to fi ber coupling applications when use with another lens or in pairs A AR Coating nm B Discontinued A AR Coating nm B C AR Coating nm C AR Coating nm 19

21 Geltech Aspheric Lenses Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 685 has nm Numerical Aperture (NA) mm replaced 5.00 with mm our Effective Focal Length (EFL) 4.03 mm 4.03 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement mm mm Ø Ø 5.23 Ø 4.00 Working Distance (WD) 2.69 mm lens code mm is 3.07 mm 3.07 mm Laser Window Thickness 1.20 mm mm Laser Window Material/Index K3 / K3 / Focus light into an optical disk. High NA for maximum light capture; large CA for minimum beam divergence Optical data storage systems A AR Coating nm B Discontinued A AR Coating nm B C AR Coating nm C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 980 has nm Numerical Aperture (NA) 0.42 replaced 0.42 with our 3.70 mm RoHS compliant 3.70 mm glass. Effective Focal Length (EFL) 4.50 mm 4.50 mm Magnifi cation Infi nite The replacement Infinite nite 4.70 mm lens 4.70 code mm is Ø Ø 4.10 Ø 3.40 Working Distance (WD) 2.38 mm mm 3.64 mm 3.65 mm Collimate or focus laser light. Moderate NA for good light capture Fiber coupling applications A AR Coating nm B Discontinued A AR Coating nm B C AR Coating nm C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 980 has nm Numerical Aperture (NA) 0.53/0.27 (object/image) 0.53 image) replaced 0.27 (object with our 4.0 mm/4.2 mm (object/image) 4.0 mm / 4.2 mm (object / image) Effective Focal Length (EFL) 2.95 mm RoHS compliant 2.95 mm glass. Magnifi cation mm The replacement 4.70 mm Ø Working Distance (WD) 2.66 mm/6.91 mm (object/image) 2.66/6.91 (front/back) lens.91 mm code is mm 4.07 mm Ø Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Finite conjugate operates at (2:1) magnifi cation High NA for maximum light capture. Laser diode pigtails (SM/MM), laser diode connectors (SM/MM), fi ber-to-fi ber connectors A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm 20

22 Geltech Aspheric Lenses Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 980 has nm Numerical Aperture (NA) 0.30/0.30 (object/image) 0.30/0.30 p (object/image) e) 1.15 mm/1.15 mm (object/image) RoHS 1.15/1.15 compliant mm (object/image) glass. Effective Focal Length (EFL) 1.16 mm mm Magnifi cation 1.00 The replacement mm lens 1.80 code mm is Ø Working Distance (WD) 1.69 mm/1.69 mm (object/image) 1.69/1.69 (front/back) mm 1.48 mm 1.48 mm Minimize alignment sensitivity; fi nite conjugate operates at (1:1) magnifi cation Lens Codes and Single lens couples light to single mode/multi-mode fi bers; small physical size for fi ber-to-fi ber coupling. Fiber coupling applications A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 410 has nm Numerical Aperture (NA) mm replaced 4.80 with mm our Effective Focal Length (EFL) 4.00 mm 4.00 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement mm mm Ø Ø 5.41 Ø 4.00 Working Distance (WD) 2.73 mm lens code mm is mm 3.04 mm Laser Window Thickness mm mm Laser Window Material/Index K3 / K3 / Focus light through disk onto storage media. High NA for maximum light capture, small size Data storage A AR Coating nm B Discontinued A AR Coating nm B C AR Coating nm C AR Coating nm Lens Codes and , please see page 32. Lens Codes and Drawing Parameter RoHS Optical Glass Material ECO-550 C nm This lens 1550 has nm Numerical Aperture (NA) mm replaced 1.50 with mm our Effective Focal Length (EFL) 1.49 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement 2.65 mm 2.65 mm Ø Ø 1.59 Ø 1.70 Working Distance (WD) 1.1 mm lens code mm is 0.88 mm 0.88 mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation. High NA for maximum light capture; small size Telecommunications A AR Coating nm B Discontinued A AR Coating nm B C AR Coating nm C AR Coating nm 21

23 Geltech Aspheric Lenses Lens Code 352-A375 Drawing Parameter 352-A375 RoHS Ø Ø Direct replacement for Kodak A375 Lens Code 352-A Optical Glass Material ECO nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 7.50 mm Optical Glass ECO550 Wavefront Error < 0.15 λ RMS (λ = 633 nm) Scratch/Dig 60/40 MgF 2 AR Coating 95% Transmission (650 nm nm) mm Working Distance (WD) mm 2.83 mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light at high magnifi cation. High NA for maximum light capture. Laser collimator for telecommunications. 352-A375A AR Coating nm 352-A375B 352-A375C AR Coating nm 352A-375M AR Coating MgF2 Drawing Parameter 352-A390 RoHS Optical Glass Material ECO nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 4.60 mm Optical Glass ECO550 Wavefront Error < 0.1 λ RMS (λ = 633 nm) Scratch/Dig 60/40 Ø Ø 5.12 MgF 2 AR Coating 95% Transmission (650 nm nm) 6.00 mm Working Distance (WD) mm mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light at high magnifi cation. High NA for maximum light capture. Laser collimator for telecommunications. Direct replacement for Kodak A A390A AR Coating nm 352-A390B 352-A390C AR Coating nm 352-A390M AR Coating MgF2 Lens Code 352-A397 Drawing Parameter 352-A397 RoHS Optical Glass Material ECO nm Numerical Aperture (NA) mm Effective Focal Length (EFL) Optical Glass ECO550 Wavefront Error < 0.1 λ RMS (λ = 633 nm) Scratch/Dig 60/40 MgF 2 AR Coating 95% Transmission (650 nm nm) Ø Ø mm Working Distance (WD) mm mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light at high magnifi cation. High NA for maximum light capture. Laser collimator for telecommunications. Direct replacement for Kodak A A397A AR Coating nm 352-A397B 352-A397C AR Coating nm 352-A397M AR Coating MgF2 22

24 Geltech Aspheric Lenses Lens Code Drawing Parameter RoHS Ø Ø Lens Code Optical Glass Material D-ZK3 633 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 13.0 mm Magnifi cation Infi nite mm Working Distance (WD) mm 2.38 mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm Drawing Parameter RoHS Ø Ø Optical Glass Material D-ZK3 633 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 12.0 mm Magnifi cation Infi nite mm Working Distance (WD) mm 2.4 mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm Lens Code Drawing Parameter RoHS Ø Ø Optical Glass Material D-ZK3 633 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 14.0 mm Magnifi cation Infi nite mm Working Distance (WD) mm mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm 23

25 Geltech Aspheric Lenses Lens Code Drawing Parameter RoHS Ø Ø Lens Code Optical Glass Material D-ZK3 633 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 9.6 mm Magnifi cation Infi nite mm Working Distance (WD) 8.13 mm mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm Drawing Parameter RoHS Optical Glass Material D-ZK3 633 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 11.0 mm Magnifi cation Infi nite Ø mm Working Distance (WD) 9.56 mm mm Ø Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm Lens Code Drawing Parameter RoHS Optical Glass Material D-ZK3 633 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) mm Magnifi cation Infi nite 6.00 mm Ø 5.40 Working Distance (WD) 9.66 mm mm Ø 6.00 Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm 24

26 Geltech Aspheric Lenses Lens Code Drawing Parameter RoHS Ø 5.00 Ø Lens Codes and Optical Glass Material D-ZK3 670 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) mm Magnifi cation Infi nite 5.00 mm Working Distance (WD) mm mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm Drawing Parameter RoHS Optical Glass Material D-ZK3 C nm This lens 670 has nm Numerical Aperture (NA) 0.21 replaced with our 2.50 mm 2.50 mm Effective Focal Length (EFL) 6.00 mm RoHS compliant 6.00 mm glass. Ø 2.60 Magnifi cation Infi nite The replacement Infinite nite RMS WFE Diffraction Limited Diffraction Limited 3.00 mm lens 3.00 code mm is Ø Working Distance (WD) 4.90 mm mm mm Collimate or focus laser light High NA for maximum light capture; small physical size. Fiber to fi ber coupling applications when use with another lens or in pairs A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material DZK-3 C nm This lens 605 has nm Numerical Aperture (NA) mm replaced 3.8 mm with our Effective Focal Length (EFL) 6.2 mm 6.45 mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. Ø 4.10 RMS WFE Diffraction Limited The replacement 4.70 mm 4.70 mm Working Distance (WD) 4.1 mm lens 4.38 code is mm 3.46 Ø Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation from a laser diode. Low NA for clean circular beam; moderate physical size Industrial barcode readers, point-of-purchase barcode readers, laser printers, laser fax machines, survey instruments A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm 25

27 Geltech Aspheric Lenses Lens Codes and Drawing Parameter RoHS Ø 1.70 Optical Glass Material D-ZK3 C nm This lens 1550 has nm Numerical Aperture (NA) 0.15 replaced with our 1.60 mm 1.50 mm Effective Focal Length (EFL) 5.00 mm RoHS compliant 5.00 mm glass. Magnifi cation Infi nite The replacement Infinite nite RMS WFE Diffraction Limited Diffraction Limited 2.00 mm lens 2.00 code mm is Ø 2.00 Working Distance (WD) 4.37 mm mm mm 1.01 mm Collimate or focus laser light Low NA for clean circular beams; small physical size. Fiber coupling applications A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material D-ZK3 C nm This lens 1550 has nm Numerical Aperture (NA) 0.18 replaced with our 2.20 mm mm Effective Focal Length (EFL) 6.10 mm RoHS compliant 6.10 mm glass. Magnifi cation Infi nite Ø 2.79 The replacement Infinite nite RMS WFE Diffraction Limited Diffraction Limited 2.79 mm lens 2.80 code mm is Ø 2.40 Working Distance (WD) 4.87 mm mm 1.93 mm 1.93 mm Collimate or focus laser light Low NA for clean circular beam; small physical size. Fiber coupling applications A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material D-ZK3 C nm This lens 650 has nm Numerical Aperture (NA) 0.18 replaced 0.18 with our 5.10 mm 5.10 mm Effective Focal Length (EFL) mm RoHS compliant mm glass. Magnifi cation Infi nite The replacement Infinite nite RMS WFE Diffraction Limited Diffraction i Limitedi Ø Ø mm lens code mm is Working Distance (WD) mm mm mm 2.76 mm Collimate or focus laser light Low NA for clean circular beam; large CA for minimum beam divergence. Fiber coupling applications, data storage A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm 26

28 Geltech Aspheric Lenses Lens Codes and Lens Code Optical Design Specifi cations Drawing Parameter RoHS Optical Glass Material D-ZK3 C nm This lens 670 has nm Numerical Aperture (NA) mm replaced 5.50 with mm our Effective Focal Length (EFL) mm mm Magnifi cation Infi nite RoHS compliant Infinite nite glass. RMS WFE Diffraction Limited The replacement Ø mm mm Working Distance (WD) mm lens 18 code is Ø mm mm Laser Window Thickness mm mm Laser Window Material/Index BK7 / BK7 / Collimate or focus laser light at high magnifi cation. High NA for maximum light capture; small size. Telecommunications A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued AR Coating nm C AR Coating nm Drawing Parameter RoHS Ø Ø Optical Glass Material D-ZK3 633 nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 4.5 mm Magnifi cation Infi nite 3.0 mm Working Distance (WD) 3.46 mm mm Laser Window Thickness mm Laser Window Material/Index BK7 / Collimate or focus laser light ay high magnifi cation from a laser diode. Low NA for clean circular beam; large CA for minimum beam divergence. Laser pointers, laser scanners, barcode readers, survey instruments A AR Coating nm B C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material D-ZLaF52LA C nm This lens 780 has nm Numerical Aperture (NA) 0.55 replaced with our 3.00 mm 3.00 mm Effective Focal Length (EFL) 2.73 mm RoHS compliant 2.73 mm glass. Magnifi cation Infi nite Infi nite RMS WFE Diffraction Limited The Diffraction replacement Limited Ø 4.00 Ø mm lens code is Working Distance (WD) 2.37 mm mm Laser Window Thickness mm mm Laser Window Material/Index Polycarbonate Disk / Polycarbonate Disk / 1.20 Focus light into an optical disk.. High NA for maximum light capture, small focused spot Optical data storage systems A AR Coating nm B Discontinued A AR Coating nm B C AR Coating nm C AR Coating nm 27

29 Geltech Aspheric Lenses Lens Codes and Drawing Parameter RoHS Optical Glass Material D-ZLaF52LA C nm This lens 1300 has nm Numerical Aperture (NA) 0.43/0.12 (object/image) 0.43 / (object /image) 1.10 mm/1.24 mm (object/image) 1.13/1.3 replaced 1.3 mm (object/image) with our Effective Focal Length (EFL) 1.14 mm 1.14 mm Magnifi cation 3.64 RoHS compliant 3.64 glass. Ø 1.66 RMS WFE Diffraction Limited The replacement 2.40 mm 2.40 mm Working Distance (WD) 4.81 mm/1.13 mm (object/image) 1.16/4.93 lens.93 mm code (front/back) is Ø 2.40 Ø mm 1.03 mm Laser Window Thickness 0.30 mm mm Laser Window Material/Index BK7 / BK7 / Finite conjugate operates at (3.70:1) magnifi cation Single lens couples light to single mode/multi-mode fi bers; small physical size for fi ber-to-fi ber coupling. Laser diode pigtails (SM/MM), laser diode connectors (SM/MM), fi ber-to-fi ber connectors A AR Coating nm A AR Coating nm B B Discontinued C AR Coating nm C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material D-ZLaF52LA C nm This lens 830 has nm Numerical Aperture (NA) 0.55 replaced 0.68 with our 3.60 mm RoHS compliant 3.60 mm glass. Effective Focal Length (EFL) 2.75 mm 2.75 mm Magnifi cation Infi nite The replacement Infinite nite 4.50 mm lens 4.00 code mm is Ø 4.50 Ø 3.80 Ø 3.70 Working Distance (WD) 2.16 mm mm mm 1.90 mm Collimate or focus laser light. High NA for maximum light capture. Fiber to fi ber coupling applications when use with another lens or in pairs A AR Coating nm B Discontinued A AR Coating nm B C AR Coating nm C AR Coating nm Lens Codes and Drawing Parameter RoHS Optical Glass Material D-ZLaF52LA C nm This lens 1550 has nm Numerical Aperture (NA) 0.60 replaced 0.60 with our 3.60 mm 3.60 mm Effective Focal Length (EFL) 2.97 mm RoHS compliant 2.97 mm glass. Magnifi cation Infi nite The replacement Infinite nite RMS WFE Diffraction Limited Diffraction i Limitedi Ø 4.00 Ø mm lens 4.00 code mm is Working Distance (WD) 1.56 mm mm 2.50 mm 2.50 mm Collimate or focus laser light at high magnifi cation. High NA for maximum light capture. Telecommunications A AR Coating nm B C AR Coating nm A AR Coating nm B Discontinued C AR Coating nm 28

30 Geltech Aspheric Lenses Lens Code Drawing Parameter Ø Ø 0.90 Lens Code Optical Glass Material PBH nm Numerical Aperture (NA) mm Effective Focal Length (EFL) mm Magnifi cation Infi nite RMS WFE < Diffraction Limited 2.50 mm Working Distance (WD) mm 0.80 mm Collimate or focus laser light at high magnifi cation. Very high NA for maximum light capture. Laser collimator for telecommunications Q AR Coating nm Drawing Parameter Front View Ø Optical Glass Material PBH nm Numerical Aperture (NA) 0.55/0.13 (object/image) 0.40 mm/0.53 mm (object/image) Effective Focal Length (EFL) mm Magnifi cation 4.02 RMS WFE Diffraction Limited mm Edge Length 1.20 mm Working Distance (WD) mm/1.910 mm (object/image) 0.35 mm Laser to laser fi ber coupling lens. High NA for maximum light capture; small size. Telecommunications Q AR Coating nm Lens Code Drawing Parameter Ø 2.27 Ø 1.67 Direct replacement for: ALPS FLBF1Z001A ALPS FLBF1Z101A Ø Optical Glass Material PBH nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 0.75 mm Magnifi cation Infi nite RMS WFE Diffraction Limited 3.0 mm Working Distance (WD) 0.2 mm 1.13 mm Distance Holder to Laser 0.23 mm Lens Holder 304 Stainless Steel Collimate or focus laser light at high magnifi cation. High NA for maximum light capture. Laser collimator for telecommunications Q AR Coating nm 29

31 Geltech Aspheric Lenses Lens Code Drawing Parameter Ø Direct replacement for: ALPS FLAM1Z001A ALPS FLAM1Z101A Ø Lens Code Ø Optical Glass Material PBH nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 0.70 mm Magnifi cation Infi nite RMS WFE Diffraction Limited 2.5 mm Working Distance (WD) 0.29 mm 0.95 mm Distance Holder to Laser 0.33 mm Lens Holder 304 Stainless Steel Collimate or focus laser light at high magnifi cation. High NA for maximum light capture. Laser collimator for telecommunications Q AR Coating nm Drawing Parameter Optical Glass Material PBH nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 1.80 mm Magnifi cation Infi nite RMS WFE Diffraction Limited Ø 1.81 Ø 1.20 Ø mm Working Distance (WD) 1.11 mm 1.28 mm Distance Holder to Laser 1.0 mm Lens Holder 304 Stainless Steel Collimate or focus laser light at high magnifi cation. Direct replacement for: High NA for maximum light capture. ALPS FLAN1Z001A Laser collimator for telecommunications. ALPS FLAN1Z101A Q AR Coating nm Lens Code Drawing Parameter Optical Glass Material PBH ± /1480 nm ± Numerical Aperture (NA) mm ± Ø Effective Focal Length (EFL) 0.75 mm Magnifi cation Infi nite RMS WFE Diffraction Limited mm ± Working Distance (WD) 0.2 mm Ø mm Distance Holder to Laser 0.23 mm Ø Lens Holder 304 Stainless Steel Collimate or focus laser light at high magnifi cation. Direct replacement for: High NA for maximum light capture. ALPS FLBN1Z001A 1.13 Laser collimator for telecommunications ALPS FLBN1Z101A Q AR Coating nm 30

32 Geltech Aspheric Lenses Lens Code Drawing Parameter Optical Glass Material PBH ± nm ± Numerical Aperture (NA) mm ± Effective Focal Length (EFL) 0.70 mm Ø Magnifi cation Infi nite RMS WFE Diffraction Limited mm ± Working Distance (WD) 0.29 mm Ø mm Distance Holder to Laser 0.33 mm Lens Holder 304 Stainless Steel Direct replacement for: ALPS FLBM1Z001A ALPS FLBM1Z101A Lens Code Ø Collimate or focus laser light at high magnifi cation. High NA for maximum light capture. Laser collimator for telecommunications Q AR Coating nm Drawing Parameter Optical Glass Material PBH nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 4.0 mm Ø Magnifi cation Infi nite Ø 1.82 RMS WFE Diffraction Limited 3.0 mm Ø Working Distance (WD) 3.36 mm 1.23 mm Distance Holder to Laser 3.36 mm Lens Holder 304 Stainless Steel 3.36 Collimate or focus laser light at high magnifi cation Direct replacement for: High NA for maximum light capture. ALPS FLAG1Z001A Laser collimator for telecommunications. ALPS FLAG1Z101A Q AR Coating nm Lens Code Drawing Parameter Optical Glass Material PBH nm Numerical Aperture (NA) mm Effective Focal Length (EFL) 2.51 mm Magnifi cation Infi nite RMS WFE Diffraction Limited Ø Ø 1.65 Ø mm Working Distance (WD) mm 1.41 mm Distance Holder to Laser 1.68 mm Lens Holder 304 Stainless Steel Collimate or focus laser light at high magnifi cation. Direct replacement for: High NA for maximum light capture. ALPS FLAE1Z001A Laser collimator for telecommunications. ALPS FLAE1Z101A Q AR Coating nm 31

33 Blue Laser Collimating Lens Optimized for Nichia blue laser Compatible with other blue diode lasers Aspheric molded glass lens Diffraction limited performance Compact, single lens design Short wavelength provides smallest spot LightPath s molded glass aspheric lens is optimized to collimate Nichia s blue laser diode, and is manufactured and designed to meet extremely stringent optical standards. Achieving good beam quality is particularly diffi cult for shorter wavelength lasers. The molded glass aspheric lenses are designed for the specifi c beam divergences, peak wavelength and window material of commercial blue diode lasers, enabling blue laser applications to achieve excellent beam quality and performance. Working with lasers from 400 nm to 415 nm with a design centered at 408 nm per the laser manufacturers specifi cation, this design was optimized with a very large and forgiving clear aperture and is also compensated for the laser manufacturers variation in window thickness. The lens utilizes LightPath s ECO-550 glass, a lead-free alternative to traditional moldable glasses. This glass is fully RoHS compliant, in accordance with the new European restrictions on hazardous substances. Lens Codes and Drawing Parameter RoHS RoHS Optical Glass Material ECO-550 ECO nm 408 nm Numerical Aperture (NA) mm 4.80 mm Effective Focal Length (EFL) 4.02 mm 4.02 mm Magnifi cation Infi nite Infi nite RMS WFE Diffraction Limited Diffraction Limited mm mm Ø Ø Ø Working Distance (WD) 2.39 mm 2.37 mm 3.02 mm mm Laser Window Thickness mm mm Laser Window Material/Index PK2 / PK2 / Collimate laser light at high magnifi cation. High NA for maximum light capture Data storage A AR Coating nm A AR Coating nm B C AR Coating nm 32

34 Glass Aspheres for Laser Tools Single lens provides same performance as doublets and triplets Reduces system cost through simple, compact design Molded lenses for greater performance repeatability Designed for high volume production In today s manufacturing environment, laser tools are a common method for generating guidelines and measuring distances or surface profi les. These tools include laser levels, laser pointers, line projectors, laser scanners, and laser trackers. LightPath s aspheric lenses are designed for use in today s high performance laser tools and measurement systems. Aspheric lenses provide a single lens solution to laser projection. These aspheric lenses provide a cost savings over spherical doublets and triplets without sacrifi cing performance. Time consuming and expensive mounting and alignment of doublets and triplets can be replaced with a simple single lens mount. Aspheric lenses also have higher transmission than multi-lens systems due to less optical material and allow more compact packaging to be produced. Contact LightPath to take advantage of the power of for a simpler optical system. Lens Code Shape Numerical Aperture Laser Tool Lenses Focal Length (mm) Outer Diameter (mm) Clear Aperture (mm) Working Distance (mm) Plano-Convex (PCX) Plano-Convex (PCX) Plano-Convex (PCX) Plano-Convex (PCX) Plano-Convex (PCX) Plano-Convex (PCX) Plano-Convex (PCX) Plano-Convex (PCX) LightPath s D-ZK3 Glass is used for all Laser Tool Lenses. Please see page for detailed descriptions of the above lenses. Standard Coatings MLBB-A Coating: 400 nm nm MLBB-B Coating: 600 nm nm MLBB-C Coating: 1050 nm nm M gf

35 Asphere Customization Capabilities Aspheric Hybrid Optics Refractive-diffractive design Color corrects with a single element Diffraction limited performance Custom F/1 and faster achromats available High performance, cost effective Diffractive Zone on an Aspheric Lens In multi-wavelength or polychromatic applications, the change in focal length due to wavelength can compromise lens performance. For example, if the application requires minimum spot size, as is required in data storage or communications systems, the spot size will change with wavelength, which can degrade system performance. In imaging applications, an uncorrected lens results in a blurry image. A colorcorrected lens is needed to minimize these effects. LightPath s line of optical products for minimizing chromatic aberrations using only a single optical element. These new glass, molded asphericdiffractive lenses, also called hybrid lenses, can be used over a range of wavelengths for many applications, such as endoscopes for medical and industrial applications, CCD cameras for imaging, as well as tunable lasers for communications products. Using LightPath s unique precision molded glass hybrid lenses, customers can now solve chromatic performance issues in a single glass lens, and reduce weight, volume and parts count at the same time. Molded In Place (MIP) Lenses LightPath s lenses can be molded directly into metallic holders, allowing the lenses to be welded or soldered into the package and eliminating the need to use epoxy. This can be an ideal solution for high volume automated assembly or in applications where strict outgassing requirements preclude the use of epoxy adhesives. Anamorphic Optics Most commercially available laser diodes project an elliptical beam due to the diode junction having a rectangular shape. This elliptical beam can create diffi culties in many applications, such as laser to fi ber coupling. LightPath s lens technology creates a simple solution to circularize and collimate many of the available laser diodes. By positioning the lens very close to the laser chip itself, these lenses provide a small circular and collimated beam, providing a very elegant and compact solution. 34

36 Mounted Aspheric Lenses Cost effective solution for mounting Geltech aspheres Easy to handle optical assembly Durable stainless-steel housing Threaded extension for easy mounting Compact size LightPath s line of mounted aspheric lenses makes assembly work quick and easy. The housings are made from durable stainless steel, which is suitable for welding or soldering. The mounts also have a threaded exterior, allowing you to simply screw the lens into place. Standard design mounts are available for 24 of our most popular lens types, but any of the lenses in the catalog can be mounted into a holder of your preference. General Specifications and Tolerances Holder Material Stainless Steel 304 Holder Outer Diameter ± mm Holder Inner Diameter ± mm Holder Length ± mm Length of Threaded Section ± mm Lens Holder Design MT6A Ø M6 x 0.5-6g Thread Lens Holder Design MT6B Ø M6 x 0.5-6g Thread Ordering Information D 1.90 D 1.97 Part Number Holder Type EFL (mm) NA D (mm) Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT6A Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT / Y-00-MT MT Y-00-MT MT Y-00-MT MT6B A397Y-00-MT MT Y-00-MT MT Y-00-MT MT Y-00-MT MT **Substitute AR coating letter for Y in the product number. Lens Holder Design MT8 Ø M8 x 0.5-6g Thread D 3.20 Lens Holder Design MT12 Ø M12 x 0.5-6g Thread D 3.20 Lens Holder Design MT9 Ø M9 x 0.5-6g Thread D 3.20 Lens Holder Design MT14 Ø M14 x g Thread For mounts with Fiber Connectors, please see page. D 35

37 Connectorized Aspheric Fiber Optic Collimators Optimal performance using Aspheric Lenses Pre-aligned for popular wavelengths Epoxy free optical path Connectorized for quick assembly Rugged stainless steel housing Threaded exterior for easy mounting LightPath s line of connectorized aspheric collimator assemblies combine the outstanding performance of glass molded aspheric lenses with the ease of assembly of a fi ber connector interface. The assemblies have a threaded exterior, which allows a quick connection to an optical bench or within an instrument. LightPath s connectorized collimators are available with FC/PC, FC/APC, or SMA fi ber optic connectors. Each collimator is individually aligned and tested for the specifi ed wavelength, and will offer excellent performance throughout the entire range of their AR coatings. Standard design assemblies are available for our most popular lens types, but any asphere in our catalog can be mounted into a custom assembly of your choice. Please contact LightPath sales for more information Part Number λ (nm) Beam ø (mm)* AR Coating Thread ø ø (mm) L2 (mm) Nominal L3 (mm) Nominal L4 (mm) Nominal (FCPC / FCAPC / SMA) A M11 x g (FCPC / FCAPC / SMA) B M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) - Y - KIT A, B, or C M11 x g (FCPC / FCAPC / SMA) A M11 x g (FCPC / FCAPC / SMA) B M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) - Y - KIT A, B, or C M11 x g (FCPC / FCAPC / SMA) A M11 x g (FCPC / FCAPC / SMA) B M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) - Y - KIT A, B, or C M11 x g (FCPC / FCAPC / SMA) A M12 x g (FCPC / FCAPC / SMA) B M12 x g (FCPC / FCAPC / SMA) C M12 x g (FCPC / FCAPC / SMA) C M12 x g (FCPC / FCAPC / SMA) C M12 x g (FCPC / FCAPC / SMA) - Y - KIT A, B, or C M12 x g (FCPC / FCAPC / SMA) A M11 x g (FCPC / FCAPC / SMA) B M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) C M11 x g (FCPC / FCAPC / SMA) - Y - KIT A, B, or C M11 x g 11 NOTE: For -KIT part numbers, Y is equal to AR coating requested. * Typical beam diameter, measured at 1/e 2, when using single mode fi ber. NEW! NEW! For all Connectorized Collimators, Pointing Accuracy = 0.5 and Waist Position = Infi nity. Connectorized Collimators can also be ordered as an unaligned kit for custom wavelength alignment. 36

38 Connectorized Aspheric Fiber Optic Collimators FC/PC Connectors FC/APC Connectors SMA Connectors FC/PC - λ FC/APC - λ SMA - λ M11 Thread Accepts FC/PC Connector M11 Thread Accepts FC/APC Connector M11 Thread Accepts SMA Connector L L L FC/PC - λ M11 Thread Accepts FC/PC Connector FC/APC - λ M11 Thread Accepts FC/APC Connector M11 Thread SMA - λ Accepts SMA Connector L L L FC/PC - λ FC/APC - λ SMA - λ M11 Thread Accepts FC/PC Connector M11 Thread Accepts FC/APC Connector M11 Thread Accepts SMA Connector L L L FC/PC - λ FC/APC - λ SMA - λ M12 Thread Accepts FC/PC Connector M12 Thread Accepts FC/APC Connector M12 Thread Accepts SMA Connector L L L FC/PC - λ FC/APC - λ SMA - λ M11 Thread Accepts FC/PC Connector M11 Thread Accepts FC/APC Connector M11 Thread Accepts SMA Connector L L L3 37

39 Black Diamond Infrared Lenses Wavelength range 1-14 m Aspheric lenses reduce number of lenses in a system Molded optics allow low cost high volume production Available with diffractive elements (DOE) for enhanced performance Smaller focal shifts due to temperature variations Improved transmission at elevated temperatures Custom designs & catalog lenses available Mid to Long Wavelength Infrared Aspheres Infrared Lenses LightPath is a recognized world leader in press molded aspherical optics. Traditionally, these aspheric lenses have limited to visible and near-infrared wavelengths. Recent advances in optical materials now provide a common technology path to produce mid and longwavelength infrared (MWIR & LWIR) aspheres by compression molding. LightPath s Black Diamond technology enables high performance, cost-effective IR aspheric lenses that do not rely on traditional diamond turning or lengthy polishing methods. LightPath s Black Diamond moldable glass has several advantages over Germanium, which is traditionally used for aspheric IR optics. The dn/dt and CTE of Black Diamond glass result in a smaller change in focal length as a function of temperature. Using Black Diamond glass enables athermalization to occur using just a single lens or with a minimum of athermalization mechanics. Germanium also suffers from transmission loss as temperature increases, especially as the temperature reaches 100 C. Germanium s transmission decreases by 20-30% at 100 C. Black Diamond aspheric lenses can be used in environments up to 130 C, enabling a range of applications that were not previously possible with Germanium. LightPath s Black Diamond aspheres are currently available as catalog lenses or on a custom basis. LightPath offers custom lens solutions for high volume manufacturing at prices equal to that of a standard off-theshelf lens. If you need a custom lens to fi t your particular application, we will be happy to design one for you. Our sales and engineering teams work closely together to assist you in design, prototyping, and production of custom glass aspheric lenses. When determining specifi cations for custom aspheric lenses, the following parameters are typically used to specify lens performance. A LightPath product expert would be happy to discuss these parameters with you to determine the appropriate lens for your application. Utilizing aspheric optics signifi cantly reduces the number of lenses required for typical thermal imaging systems. Traditional Germanium aspheres are manufactured by diamond turning, which is timeconsuming and expensive process. Since diamond turned Germanium lenses are made one at a time, the lenses may also suffer from variations in surface fi gure leading to variations in performance from lens to lens. The Black Diamond molding process allows lenses to be manufactured in high volume with highly repeatable, consistent performance. Diffractive features are typically added to IR aspheres to allow for sophisticated beam shaping or achromatization over a range of wavelengths. With LightPath s molding technologies, these features can be molded directly into the surfaces of the lens. Custom Black Diamond Infrared Lenses Wavelength of Application Numerical Aperture or f/# or Laser Effective Focal Length Clear Aperture Working Distance Mechanical Restraints microns mm mm mm LightPath specializes in producing custom lens and lens assembly designs in a short time frame. 38

40 Black Diamond Infrared Glass Data (BD-2) BD-2 Uncoated Transmission Curve (5 mm thickness) 100% 80% % Transmission 60% 40% 20% 0% Wavelength (μm) Refractive Indices and Absorption Coeffi cient Index λ (μm) Absorption (cm -1 ) LightPath lenses that have a 390xxx prefix use the BD-2 IR glass. Mechanical Properties Density 4.67 g/cm³ Hardness 150 knoop Young's Modulus 22.1 GPa Thermal Properties T g 278 C CTE 14 x 10-6 / C dn/dt 91 x 10-6 / C Composition Component Percentage Germanium (Ge) 28% Antimony (Sb) 12% Selenium (Se) 60% Equivalent Glasses Manufacturer Glass Amorphous Materials AMTIR-3 Schott/Vitron IG5 Infrared Lenses 39

41 Black Diamond Infrared Glass Data (BD-2) Available Coatings Coating Range (μm) R AVG IR < 1.0% per side IR < 0.6% per side IR < 1.0% per side IR-1 Typical Reflectance Curve (spec: 7-14 μm) Infrared Lenses IR-3 Typical Reflectance Curve (spec: 2-6 μm) IR-4 Typical Reflectance Curve (spec: μm) 5.0 % Reflectance Wavelength (µm) 40

42 Black Diamond Infrared Lenses MWIR & LWIR Collimating Lenses High numerical aperture for max collection effi ciency Compact, single lens design Diffraction limited performance RoHS Compliant MWIR/LWIR collimating lenses have a high numerical aperture for maximum light collection for collimating light from MWIR and LWIR lasers, including quantum cascade lasers (QCL). The aspheric design enables a single lens to replace complex multiple component optical system. Lens Code Lens Code Ø 5.55 Ø Optical Glass Material BD m Numerical Aperture (NA) mm Effective Focal Length (EFL) 4.0 mm ± 1% Magnifi cation Infi nite RMS WFE < Diffraction Limited 6.50 mm Working Distance (WD) 3.05 mm 2.5 mm Ø 4.51 Ø Optical Glass Material BD-2 7 m Numerical Aperture (NA) mm Effective Focal Length (EFL) mm ± 1% Magnifi cation Infi nite RMS WFE < Diffraction Limited 5.50 mm Working Distance (WD) mm 3.0 mm Infrared Lenses Mounted MWIR/LWIR XX-MT XX-MT General Specifications and Tolerances M9 x g Thread M9 x g Thread Holder Material Stainless Steel 304 Holder Outer Diameter ± mm Ø 9.25 Ø 7.50 Ø 5.50 Ø 7.00 Ø Ø 7.66 Ø 4.74 Ø 6.10 Holder Inner Diameter ± mm Holder Length ± mm Length of Threaded Section ± mm 41

43 Infrared Lens Assemblies Molded lenses using Black Diamond chalcogenide glass Wavelength range 8 m 14 m Passive athermalization for -40 C to +85 C High volume, cost effective manufacturing Designed for uncooled IR sensors LightPath s Infrared Lens Assemblies are specifi cally designed to be a lower cost replacement for standard IR optical assemblies. These lens assemblies integrate our Black Diamond molded lenses into a complete ready-to-use package. Molded IR lenses are a lower cost substitute for traditional high volume diamond-turned optics. Part Number : Athermalized Black Diamond Lens Assembly Drawing Optical Properties Infrared Lenses Ø Front Vertex 14.1 Rear Vertex M25 x Long Focal Length 19 mm (nominal) f/# 1.1 Back Focal Distance 14.1 mm Diagonal FOV 30 (maximum) Diagonal Image Size 10 mm (maximum) Transmission ~ 90% (average) Glass Material BD-2 Focus Fixed Focus, Manually Adjusted Focus Range 0.5 m to Infi nity Athermalized Image Plane Mechanical Properties Weight 25 g Lens Mount M25 x 0.5 Environmental Properties Operating Temperature -40 C to +85 C Custom Lens Assembly Specifications Wavelength of Application microns Detector # of Pixels x f/# Detector Pixel Size microns Field of View (FOV) degrees Working Distance mm Effective Focal Length mm Mechanical Interface MTF lp/mm Environmental Constraints Detector Type 42

44 GRADIUM Lenses Gradient index lenses for high power laser delivery Aspheric performance Smaller focused spot size Single lens replacement for conventional doublets High performance, cost effective Standard designs with diameters from 5 mm to 80 mm In high performance optical systems, spherical aberration, chromatic aberration and astigmatism induce sweat on the brows of optical designers. These aberrations can prevent optical systems from reaching their full potential. Avoiding these factors in optical systems is often diffi cult without using multiple lens elements. LightPath s unique line of GRADIUM optics makes correcting these aberrations with a single optical element a practical reality. Standard Spherical Lens Standard spherical lenses suffer from spherical aberration, which artifi cially limits the focused spot size. GRADIUM lenses are made from LightPath s proprietary axial gradient index glass. Its unique refractive qualities can be exploited to reduce spherical aberrations resulting in performance similar to single-term aspheres. GRADIUM lenses have applied as simple singlets or doublets in complex multielement systems. They have very well received for use in high-power industrial laser systems; many of the world s largest Nd:YAG and fi ber laser manufacturers now incorporate GRADIUM optics in their laser delivery systems. LightPath s achromatic doublets are designed for use with collimated, polychromatic light in the visible spectrum. The GRADIUM glass element is used to reduce the spherical aberration which is a common side effect of a cemented doublet design. Operating Temperature Storage Temperature Tolerance General GRADIUM Lens Specifications 546 nm -20ºC to +200ºC -40ºC to +300ºC ± mm GRADIUM Lens GRADIUM s unique refractive index profi le bends rays while traveling through the lens, resulting in a better focused, smaller spot. GRADIUM Lenses Tolerance ± mm Effective Focal Length (EFL) for GPX, GBX, and GMN Series ± 1% Working Distance (WD) for GPX, GBX, and GMN Series ± 1% Effective Focal Length (EFL) for GAD Series ± 2% Working Distance (WD) for GAD Series ± 2% Surface Quality 40/20 Scratch/Dig GRADIUM lenses provide a cost-effective solution for many high-performance applications. 43

45 GRADIUM Lenses GRADIUM lenses take advantage of recent advances in the manufacturing of axial gradient glass. Large diameter blanks are fabricated with index changes ( n) of up to 0.15, about 100 times that available from radial GRIN (GRadient INdex) technology. The large range in n available provides a substantial ability to correct aberrations, especially spherical. The process used to produce the GRADIUM glass turns a series of SF glass layers into a single piece of gradient material. Unlike radial GRIN lenses, this process provides large diameter optical blanks with controlled index and dispersion profi les. Proper gradient profi le selection allows a simple spherical lens to act as an asphere. GRADIUM lenses should be used wherever small spot size, high numerical aperture (NA), increased beam energy, or excellent wavefront quality is important. A GRADIUM singlet does not have the limited laser damage threshold of a conventional cemented doublet, so laser power can be increased, leading to increased production throughput. GRADIUM glass offers the additional benefi t of chromatic correction. The dispersion, as well as the optical index, varies in a controlled fashion within the lens. A fi nished lens can be viewed as a seamless, contiguous combination of many glass types. This continuous variation results in a transfer aberration correction not possible with homogeneous lenses. The GRADIUM Process Stacked Glass Layers (of varying refractive indexes) Gradient Index Lens Blank (of varying refractive indexes) Refractive index profi le of diffused gradient lens blank GRADIUM Lenses Typical Spot Diagram These diagrams show the performance of a GRADIUM lens over a comparable BK-7 plano-convex lens. Standard BK7 Plano-Convex Lens GRADIUM Singlet Lens 44

46 GRADIUM Lenses Standard GRADIUM Lenses Plano-Convex Lens Code Outer Diameter (mm) Clear Aperture (mm) F/# Effective Focal Length (mm) Center Thickness (mm) Back Focal Length (mm) GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GBX GBX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GPX GBX GBX GBX GBX GAD GAD GAD GMN *Additional charges and longer lead time may apply for these designs. Available GRADIUM Lenses* Bi- Convex Plano-Convex Bi-Convex Achromat ME Plano-Convex (GPX) EFL BFL CA OD CT Bi-Convex (GBX) EFL BFL CA OD CT Meniscus (GMN) EFL BFL CA OD CT Achromatic Doublet (GAD) EFL BFL CA OD CT GRADIUM Lenses 45

47 GRADIUM Lenses Broad Band Standard Anti-Reflective Coatings Coating Code Wavelength Refl ectivity per Surface % -BB nm < 0.5 Average -BB nm < 0.5 Average Customization LightPath would be happy to design a custom GRADIUM lens to your individual specifi cations. The typical required parameters for custom GRADIUM lenses are: Dual Band -DB3 1310/1550 nm < 0.25 Maximum -DB5 808/940 nm < 0.25 Maximum Effective Focal Length (EFL) Back Focal Length (BFL) mm mm VC -VC nm < 0.25 Maximum mm mm Available Anti-Reflective Coatings Wavelengths of Interest Laser Power nm GRADIUM Lenses Broad Band Dual Band VC Available Coatings* Wavelength Refl ectivity per Surface % -BB nm < 0.50 Average -BB nm < 0.50 Average -DB1 633/1064 nm < 0.25 Maximum -DB2 532/1064 nm < 0.25 Maximum -DB4 530/670 nm < 0.25 Maximum -DB6 1064/1550 nm < 0.25 Maximum -VC1 488 nm < 0.25 Maximum -VC2 532 nm < 0.25 Maximum -VC3 633 nm < 0.25 Maximum -VC4 670 nm < 0.25 Maximum -VC5 780 nm < 0.25 Maximum -VC6 830 nm < 0.25 Maximum -VC7 980 nm < 0.25 Maximum -VC nm < 0.25 Maximum -VC nm < 0.25 Maximum -VC nm < 0.25 Maximum *Additional charges and longer lead time may apply for these coatings. Standard Coating Curves Anti-Reflective Coating Wavelength Range Refl ectivity Laser Beam Diameter Beam Quality For a more detailed list of parameters, please visit our website at or contact LightPath at to discuss your particular requirements. nm mm 46

48 Optical Isolator Capabilities Low cost RoHS Compliant Isolators Epoxy free optical path available Flexible optical and physical design Design variations without major process or tooling changes Optical Isolators provide lasers with immunity from back-refl ection, thereby improving the signal to noise ratio for laser diode based transmitters. This is especially important for high data rate transceivers and transponders, or those devices requiring long span lengths between transceiver pairs. All of our isolators are based on dichroic polarizing glass and Faraday rotating crystals for highest performance. These devices are available in a single stage, 1.5 stages, or double stages, with multiple stages providing progressively higher isolation. LightPath has extensive capability to design and build custom products where the fl exibility of our platform-based processes provides a responsive and competitive advantage. We offer isolators in the Surface-Mount and Sub-Mount form factors. In addition, we manufacture isolators with either an epoxy-free optical path or with a laminated core. LightPath works with customers on the front-end to tailor isolators for the manufacture of next generation products. The primary benefi ts of our approach to manufacturing include reduced costs as a result of higher yields, throughput and product consistency as a result of automation. LightPath is capable of delivering a total solution to its OEM customers, from prototype and development contracting through high-volume production. Typical Isolator Performance Parameters Isolator Type Minimum Isolation Max. Insertion Loss Single Stage 25 db 0.3 db I.5 State 42 db 0.5 db Double Stage 47 db 0.5 db This table shows typical specifi cations for single, 1.5, and double stage isolators (Temperature 0 C to 85 C λ (center) ± 20 nm. Typical Temperature and λ Dependence The following graphs show how isolation performance changes as a function of temperature and wavelength for single stage, 1.5 stage, and double stage isolators. Isolation performance increases as stages are added to the isolator. Additional stages also reduce the sensitivity of the isolator to changes in temperature and wavelength. LightPath will customize isolators to be optimized for isolation performance over a specifi c temperature range and wavelength. These optimized isolators can be mass produced very quickly at prices comparable to the standard isolators listed in this catalog. Isolation & Insertion Loss as a Function of Temp. and λ Single Stage (non-latching garnet) Isolation (db) Insertion Loss Temperature C 1.5 Stage (non-latching garnet) Isolation (db) Insertion Loss Temperature C Insertion Loss (db) Insertion Loss (db) Double Stage (non-latching garnet) Isolation (db) Dbl 1528 Dbl 1548 Dbl 1567 Insertion Loss Temperature C Insertion Loss (db) Optical Isolators 47