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Product Catalog

LightPath Technologies Page

Company Overview 2Markets Served 3LightPath’s Capabilities 4

Custom Engineering 5LightPath’s Technology Portfolio 6

Geltech Aspheric Lenses 6Molded Glass Lens Arrays 6Tx™ Asphere Wafer-Based Molded Optics 6Black Diamond™ Infrared Lenses 7Imaging and Optical Assemblies 7GRADIUM® Lenses 7RoHS Compliant Optical Isolators 7

Geltech Aspheric Lenses 8

Technical Information 8Standard Glasses 10Standard Anti-Refl ective Coatings 11Choosing the Right Aspheric Lens 12Aspheric Lens Selection Guide 13Aspheric Lens Product Numbers & Specifi cations 15Blue Laser Collimating Lens 32Glass Aspheres for Laser Tools 33Asphere Customization Capabilities 34Mounted Aspheric Lenses 35Connectorized Aspheric Fiber Optic Collimators 36

Black Diamond™ Infrared Lenses 38

Mid to Long Wavelength Infrared Aspheres 38Black Diamond™ Infrared Glass Data (BD-2) 39Available Coatings for BD-2 Infrared Lenses 40MWIR & LWIR Collimating Lenses 41Black Diamond™ Thermal Imaging Lens Assemblies 42

GRADIUM® Lenses 43

Technical Information 43GRADIUM® Lens Product Numbers & Specifi cations 45Standard & Available Coatings 46

Optical Isolators 47

Optical Isolator Capabilities 47Tx™ Isolators 48Oasis™ Monolithic Isolator and Aspheric Lens 48

2603 Challenger Tech CourtSuite 100Orlando, Florida 32826Phone: 1-407-382-4003Toll Free: 1-800-472-3486Fax: 1-407-382-4007www.lightpath.com

Optical Products We Pro-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.

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.

Optical Products We Produce

Aspheres

Collimators

Black Diamond™ Infrared Aspheres

GRADIUM®

14 μm2.0 μm500 nm385 nm200 nm

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.

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 in-house 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.

LightPath QualitySYSTEM CERTIFICATION

ISO

9001:2000

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.

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.

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.

Facilities

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Company Overview

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.

Metrology & Instrumentation

MedicalWhen 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.

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 been developed for eye and instrument protection against damaging laser beams.

Defense & Government

CommunicationsLightPath products have been 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.

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-to-print manufacturers use our aspheric molded optics for unmatched performance.

Industrial

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Markets Served

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.

ProductionRamp-Up

Design

Prototypes

High Volume

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

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

Prototypes have now been customer qualifi ed

Hard tooling begins

Transition to LightPath’s China high volume production facility begins

Hard tooling complete

Production at LightPath’s China high volume manufacturing facility

Discussions begin on improvements for next generation designs

Business Life Cycle

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.

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LightPath’s Capabilities

• 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

“When it comes to designing

optical systems, it takes more than

a computer to make it right.”

From start to fi nish LightPath provides you with the required expertise to produce the highest quality optical components!

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.

Opto-Mechanical Design

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.

Volume 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.

Vertically Integrated Design & Manufacturing

Contact LightPath today to discuss how we can help you with your application.

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.

ITAR Compliance

ITAR DTC Code 090617976

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Custom Engineered Integrated Optical Systems and Assemblies

Geltech® Aspheric Lenses

• D-ZK3 - high volume RoHS compliant glass

• D-ZLaF52LA - higher index RoHS compliant glass

• ECO-550 - 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

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.

Molded Glass Lens Arrays

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.

Tx™ Asphere Wafer-Based Molded Optics

LightPath's Typical Aspheric Manufacturing Tolerances*

Parameter Commercial(standard) Precision

Center Thickness (CT) ± 0.025 mm ± 0.010 mm

Outer Diameter (OD) ± 0.015 mm ± 0.005 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.

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

been 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 been designed, tested and qualifi ed. Our

standard glass catalog includes:

Contact us to discuss lens designs using any of these moldable glasses.

Most moldable glasses from Corning®, Schott®, Sumita®, & CDGM® can be used with LightPath's molding process.

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LightPath’s Technology Portfolio

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.

GRADIUM® Lenses

Oasis™ IsolatorsLightPath 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.

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.

RoHS Compliant Optical Isolators

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.

Imaging and Optical Assemblies

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™ Infrared Lenses

Black Diamond Manufacturing Tolerances*

Parameter Typical Value

Center Thickness (CT) ± 0.030 mm

Diameter ± 0.015 mm

Wedge 4 arcmin

Power/Irregularity 3/1 fringes at 633 nm

Roughness 15 nm

Refractive Index ± 0.005

* Manufacturability depends on size and shape of the optics, as well as production volume.

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LightPath’s Technology Portfolio

Typical Tolerances

Outer Diameter (OD) ± 0.015 mm

Clear Aperture (CA) ± 0.100 mm

Effective Focal Length (EFL) ± 1%

Working Distance (WD) ± 1% of EFL

Spherical vs Aspherical Lens Systems

Aspheric Lens

Spherical System

Aspheres provide elegant single-element simplicity

ClearAperture

OuterDiameterEdge

Thickness

LaserWindow

WorkingDistance

CenterThickness

• High quality optical glass lenses

• Custom designs available

• Numerical aperture up to 0.83

• Diameters from 0.250 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 been known for centuries that spherical geometry is not optimal for refracting light, the expense of fabricating non-spherical (aspheric) surfaces has inhibited their use. With the breakthrough of LightPath’s glass molding technology, this optimal lens geometry has become a reality.

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.

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 PerformanceLightPath’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.

Optical performance is guaranteed by test methods utilizing 632.8 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.

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Geltech Aspheric LensesGeltech Aspheric Lenses

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.

Lens HoldersThe 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 632.8 nm. Most of our lenses are guaranteed to be diffraction limited, which means the RMS WFE < 0.070 λ at the design wavelength.

LightPath aspheric lenses are typically plano-convex or bi-convex, with diameters as large as 25 mm or as small as 0.250 mm. LightPath has the capability to dice the lenses to specifi ed shapes for easier mounting.

Shapes and Sizes

Optical Performance

Our molded aspheric lenses are available with numerical apertures ranging from 0.15 up to 0.83. 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.

Numerical Aperture

Application notes for choosing the right aspheric lens are also available online. Please see www.lightpath.com/literature/

technicalPapers.php for more details.

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 Aspheres

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.

Diffractive Hybrid Lenses

Custom Asphere Specifi cations

Wavelength Used microns

Numerical Aperture (NA)

Minimum Clear Aperture mm

Effective Focal Length (EFL) mm

Minimum Back Focal Length mm

Mechanical Space Constraints

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Geltech Aspheric Lenses

LensCode Glass Type Refractive

IndexAbbe

Number CTE dn/dT Equivalent Glasses RoHS Compliance

350xxx C-0550 1.605 νd = 50.42 15 x 10-6 / °C -11 x 10-6 / °C Corning BCD-C2060 & Schott SK16 X

352xxx ECO-550 1.606 νd = 50.27 11.62 x 10-6 / °C 2.39 x 10-6 / °C N/A

354xxx D-ZK3 1.586 νd = 60.71 7.6 x 10-6 / °C 3.2 x 10-6 / °C Hoya M-BACD5N & Ohara L-BAL35

355xxx D-ZLaF52LA 1.806 νd = 40.79 6.9 x 10-6 / °C 6.5 x 10-6 / °C Ohara L-LAH53, Hoya M-NBFD130, Sumita K-VC89

370xxx PBH71 1.922 νd = 21.29 8.9 x 10-6 / °C 13.1 x 10-6 / °C Schott SF66, Hoya FDS1, Sumita PSFN5 X

Standard Glass Internal Transmission Curves (5 mm thickness)

D-ZLAF52LA → 355xxx Series of LensesThis 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 LensesThis glass is best suited for those applications that require a low cost glass for higher volume manufactur ing.

ECO-550 → 352xxx Series of LensesNew 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-0550 → 350xxx Series of LensesCorning® developed a special glass to allow production of highly sophisticated aspheric lenses that are cost ef fective. The code for this glass is C-0550, and its low dispersion (νd = 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 proper ties.

PBH71 → 370xxx Series of LensesFor aspheric lenses that require a glass with a higher index of refraction, LightPath also offers lenses made from Ohara® PBH71 glass. Its high index (nd = 1.92286) 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.

LightPath Technologies manufactures aspheric lenses using several different types of glass. These glasses have been fully qualifi ed, along with the corresponding AR coating. Transmittance of all fi ve glasses is very good over a large wavelength spectrum.

Standard Glasses

LightPath’s capabilities include most high volume moldable glasses from Corning®, Schott®, Sumita®, and CDGM®.

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Standard Anti-Refl ective Coatings

Available Coatings

Lens Series Coating λ Range (μm) RMAX

352xxx MLBB-D 1300 - 1700 < 0.25%

352xxx MLBB-E 1800 - 2400 < 0.50%

370xxx MLBB-O 600 - 1050 < 1.0%

370xxx MLBB-P 1050 - 1600 < 1.0%

Standard Coatings

Lens Series Coating λ Range (μm) RMAX

352xxx, 354xxx, 355xxx MLBB-A 400 - 600 < 1.0%

352xxx, 354xxx, 355xxx MLBB-B 600 - 1050 < 1.0%

352xxx, 354xxx, 355xxx MLBB-C 1050 - 1600 < 1.0%

352xxx, 354xxx, 355xxx MLBB-M 700 - 900 < 2.0%

370xxx MLBB-Q 1300 - 1700 < 0.25%

Typical AR Coating Curves

A Coating

550 600500450400 575525475425

Wavelength (nm)

Refle

ctan

ce (%

)

0

0.2

0.6

0.4

0.8

1.0

B Coating

575 800 850650600 900 950700 750 1000 1050 11000

0.2

0.6

0.4

0.8

1.0

Wavelength (nm)

Refle

ctan

ce (%

)

C Coating

160014001300 1700150011001000 1200

Wavelength (nm)

Refle

ctan

ce (%

)

0

0.2

0.6

0.4

0.8

1.0

M Coating

0800 850650600 900 950700 750 1000

Wavelength (nm)

Refle

ctan

ce (%

)

0.2

0.60.4

0.81.01.2

1.61.4

1.82.0

Q Coating

Wavelength (nm)

Refle

ctan

ce (%

)

1550 1600140013501300 1650 17001450 15000

0.2

0.6

0.4

0.8

1.0

NOTE: Coating specifi cation λ range = 600 μm - 1050 μm.

NOTE: Coating specifi cation λ range = 1050 μm - 1600 μm.

LightPath’s rigorous qualifi cation process ensures that all of the standard coatings will pass the abrasion and adhesion resistance requirements of ISO+9211-4-1996.

LightPath is happy to provide any AR

coatings based on specifi c requirements.

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.

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NA = n · sin (φ)

Beam Diameter ≅ 2· EFL· NA

Beam Diameter ≅ 2· EFL· NA

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.

1. To convert a half max beam diameter to a full beam

diameter, multiply the diameter by 2.576.

2. To convert a 1/e² beam diameter to a full beam

diameter, multiply the diameter by 1.517.

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:

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-the-shelf components. This guide assumes that the input laser light has already been 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:

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.

where NA is the numerical aperture of the fi ber that is used for the coupling.

Solving for EFL it becomes:

For Fiber Coupling

EFL ≅ Beam Diameter

2· NA

φ = sin -¹ (NA)

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:

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.

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:

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:

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).

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).

For Diode Collimation

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Geltech Aspheric LensesChoosing the Right Aspheric Lens

Laser Diode Collimating Lenses

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LensCode NA EFL

(mm)CA

(mm)OD

(mm)

Window Thickness

(mm)

352022 0.47 4.47 4.20 5.42 1.20

352105 0.54 5.50 6.00 7.20 0.25

352110 0.40 6.24 5.00 7.20 0.275

352115 0.52 6.75 7.00 9.20 0.25

352125 0.50 10.00 10.00 11.00 0.25

352140 0.55 1.45 1.60 2.40 none

352150 0.50 2.00 2.00 3.00 0.25

352170 0.30 6.16 3.70 4.70 0.275

352220 0.25 11.00 5.50 7.20 0.25

352230 0.55 4.51 4.95 6.325 0.25

352240 0.50 8.00 8.00 9.94 0.25

352330 0.68 3.10 5.00 6.325 none

352350 0.42 4.50 3.70 4.70 none

352673 0.60 4.02 4.80 6.325 0.25

352710 0.50 1.49 1.50 2.65 0.25

352-A375 0.30 7.50 4.50 6.51 0.275

352-A390 0.53 4.60 4.89 6.00 0.275

352-A397 0.30 11.00 6.68 6.15 0.275

355390 0.68 2.75 3.60 4.00 none

355660 0.60 2.97 3.60 4.00 none

370060 0.60 0.682 0.84 2.50 none

370840 0.80 0.75 1.20 3.00 none

370880 0.60 0.70 0.84 2.50 none

370890 0.30 1.80 1.08 3.00 none

370920 0.80 0.75 1.20 3.60 none

370930 0.60 0.70 0.84 1.77 none

Laser to Fiber Coupling Lens

LensCode

NA(object)

NA(image) MAG EFL

(mm)OD

(mm)352440 0.53 0.27 2.00 2.95 4.70

355200 0.43 0.12 3.64 1.14 2.40

370631 0.55 0.13 4.02 0.382 1.20

Standard Lenses

Lens Code NA EFL (mm) CA (mm) OD (mm)

352022 0.47 4.47 4.20 5.42352080 0.55 3.89 4.29 6.33352105 0.54 5.50 6.00 7.20352110 0.40 6.24 5.00 7.20352115 0.52 6.75 7.00 9.20352125 0.50 10.00 10.00 11.00352140 0.55 1.45 1.60 2.40352150 0.50 2.00 2.00 3.00352170 0.30 6.16 3.70 4.70352220 0.25 11.00 5.50 7.22352230 0.55 4.51 4.95 6.33352240 0.50 8.00 8.00 9.94352260 0.16 15.29 5.00 6.50352280 0.15 18.40 5.50 6.50352330 0.68 3.10 5.00 6.33352340 0.62 4.03 5.00 6.33352350 0.42 4.50 3.70 4.70352440 0.53 / 0.27 2.95 4.00 / 4.20 4.70352450 0.30 / 0.30 1.16 1.15 / 1.15 1.80352610 0.60 4.00 4.80 6.325352671 0.60 4.02 4.80 6.33352673 0.60 4.02 4.80 6.33352710 0.50 1.49 1.50 2.65

352-A375 0.30 7.50 4.50 6.51352-A390 0.53 4.60 4.89 6.00352-A397 0.30 11.00 6.59 7.20354057 0.20 13.00 5.20 6.33354058 0.22 12.00 5.20 6.33354059 0.19 14.00 5.20 6.33354060 0.30 9.60 5.20 6.33354061 0.24 11.00 5.20 6.33354062 0.24 11.00 5.20 6.00354120 0.15 15.04 4.50 5.00354130 0.21 6.00 2.50 3.00354171 0.30 6.20 3.70 4.70354430 0.15 5.00 1.60 2.00354550 0.18 6.10 2.20 2.79354560 0.18 13.86 5.10 6.33354850 0.13 22.00 5.50 6.33354996 0.24 11.00 5.50 6.33355160 0.55 2.73 3.00 4.00355200 0.43 / 0.12 1.14 1.13 / 1.3 2.40355390 0.55 2.75 3.60 4.50355660 0.60 2.97 3.60 4.00370060 0.600 0.682 0.840 2.500370631 0.55 / 0.13 0.382 0.40 / 0.53 0.550370840 0.800 0.750 1.200 3.000370880 0.600 0.700 0.840 2.500370890 0.300 1.800 1.080 3.000370920 0.800 0.750 1.200 1.670370930 0.600 0.700 0.840 1.765370940 0.170 4.000 1.370 3.000370945 0.100 2.510 0.510 2.250

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Fiber to Fiber Coupling Lens

FIBER FIBER

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LensCode

NA(object)

NA(image) MAG EFL

(mm)OD

(mm)352450 0.30 0.30 1.00 1.16 1.80

Focal Length (mm)0 – 1.9 2 – 3.9 4 – 5.9 6 – 9.9 10 – 22

Num

eric

al A

pert

ure

(NA

)

0.10 – 0.19 370945 370940354430 354550

354560 354059 354120 352260 352280 354850

0.20 – 0.29 354130354061 354062354996 352220354058 354057

0.30 – 0.39 352450370890

352170 354171 354060 352-A375 352-A397

0.40 – 0.49 355200 352022352350 352110

0.50 – 0.59370631352140352710

352150 355390352440 352080

352230352-A390352105

352115352240 352125

0.60 – 0.69370060370880370930

355660352330

352671352673352340

0.70 – 0.89 370840370920

Data Storage Objective Lenses

LensCode NA EFL

(mm)CA

(mm)OD

(mm)Media

Thickness(mm)

352022 0.47 4.47 4.20 5.42 1.20352080 0.55 3.89 4.29 6.325 1.20352340 0.62 4.03 5.00 6.325 1.20352610 0.60 4.00 4.80 6.325 1.20352671 0.60 4.02 4.80 6.33 0.250352673 0.60 4.02 4.80 6.33 0.250355160 0.55 2.73 3.00 4.00 1.20

Fiber Collimating/Coupling Lenses

LensCode NA EFL

(mm)CA

(mm)OD

(mm)352170 0.30 6.16 3.70 4.70352220 0.25 11.00 5.50 7.20352260 0.16 15.29 5.00 6.50352280 0.15 18.40 5.50 6.50354057 0.20 13.00 5.20 6.33354058 0.22 12.00 5.20 6.33354059 0.19 14.00 5.20 6.33354060 0.30 9.60 5.20 6.33354061 0.24 11.00 5.20 6.33354062 0.24 11.00 5.20 6.00354120 0.15 15.04 4.50 5.00354130 0.21 6.00 2.50 3.00354171 0.30 6.20 3.70 4.70354430 0.15 5.00 1.50 2.00354550 0.18 6.10 2.20 2.80354560 0.18 13.86 5.10 6.325354850 0.13 22.00 5.50 6.33354996 0.24 11.00 5.50 6.33370890 0.30 1.80 1.08 3.00370940 0.17 4.00 1.37 3.00370945 0.10 2.51 0.51 2.25

Fiber Collimating

Fiber Coupling

Geltech Aspheric Lens Selection Guide

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Lens Code 352105 Optical Design SpecificationsDrawing Parameter 352105 RoHS

Surface 2

3.596

Ø 7.200

Surface 1

Ø 6.14

3.55

Ø 5.00

Optical Glass Material ECO-550Design Wavelength 633 nmNumerical Aperture (NA) 0.54Clear Aperture (CA) 6.00 mmEffective Focal Length (EFL) 5.5 mmMagnifi cation Infi niteRMS WFE Diffraction LimitedOuter Diameter (OD) 7.20 mmWorking Distance (WD) 3.596 mmCenter Thickness (CT) 3.55 mmLaser Window Thickness 0.250 mmLaser Window Material/Index BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation from a laser diode.

Lens Characteristics High NA for maximum light capture; large CA and long focal length for minimum beam divergence.

Typical Products General purpose laser diode collimation..

Order Nomenclature352105A AR Coating 400-600 nm352105B AR Coating 600-1050 nm352105C AR Coating 1050-1600 nm

Lens Codes 352080 and 350080 Optical Design SpecificationsDrawing Parameter 352080 RoHS 350080

Surface 2

2.7143.05Surface 1

Ø 6.325

Ø 4.95

Ø 4.35

Optical Glass Material ECO-550 C-0550Design Wavelength 780 nm 780 nmNumerical Aperture (NA) 0.55 0.55Clear Aperture (CA) 4.29 mm 4.29 mmEffective Focal Length (EFL) 3.89 mm 3.89 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 6.325 mm 6.325 mmWorking Distance (WD) 2.714 mm 1.50 mmCenter Thickness (CT) 3.05 mm 3.07 mmLaser Window Thickness 1.20 mm 1.20 mmLaser Window Material/Index Polycarbonate / 1.573 Polycarbonate / 1.573Design Objective Focus light into an optical disk.

Lens Characteristics High NA for maximum light capture; small focused spot.

Typical Products Optical data storage systems.


350080A AR Coating 400-600 nm350080B AR Coating 600-1050 nm350080C AR Coating 1050-1600 nm


Ø 3.82 Surface 2

3.083.45Surface 1

Ø 5.420

Ø 4.47

Optical Glass Material ECO-550 C-0550Design Wavelength 780 nm 780 nmNumerical Aperture (NA) 0.47 0.47Clear Aperture (CA) 4.20 mm 4.20 mmEffective Focal Length (EFL) 4.47 mm 4.47 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 5.42 mm 5.42 mmWorking Distance (WD) 3.08 mm 1.88 mmCenter Thickness (CT) 3.45 mm 3.44 mmLaser Window Thickness 1.20 mm 1.20 mmLaser Window Material/Index Polycarbonate / 1.573 Polycarbonate / 1.573Design Objective Focus light into an optical disk.

Lens Characteristics Moderate NA for good light capture; small focused spot.





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B AR Coating 600-105B AR Coating 600-105


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C-0550780

0.55

3 89 mmInfi nite

Diff ti Li it d6.325 mm

3.07 mm1.20 mm

Polycarbonate / 1.573

This lens has been 780 nm780 nm

replaced with our l d i h4.29 mm4 29 mm

RoHS compliant glassRoHS compliant glass. RoHS compliant glass3.89 mmmInfiniteInfinite

The replacementppDiffraction LimitedDiffraction Limited

lens code is1.50 mm1.50 mm

3520801 20 mm1.20 mm

C-0550780 nm

0.474.20 mm4.47 mmInfi nite

Diffraction Limited5.42 mm1 88 mm3.44 mm1 20

Polycarbonate / 1.573


l d ithreplaced with our l d ith4.20 mm4.20 mm

RoHS compliant glassRoHS compliant glass. RoHS compliant glass4.47 mmInfiniteInfinite

The replacementThe replacementThe replacementDiffraction LimitedDiffractio5 42 mm42 mm

lens code islens code islens code is1.88 mm1.88 mm

3520221.20 mm1.20 mm

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Surface 2

4.5554.00

Ø 9.20

Surface 1

Ø 7.292 Ø 5.80






Surface 2

7.8134.00

Ø 10.14

Surface 1

Ø 11.000 Ø 9.91






Surface 2

3.394Surface 1

Ø 5.87

5.36

Ø 4.40

Ø 7.200

Optical Glass Material ECO-550 C-0550Design Wavelength 780 nm 780 nmNumerical Aperture (NA) 0.40 0.40Clear Aperture (CA) 5.00 mm 5.00 mmEffective Focal Length (EFL) 6.24 mm 6.24 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 7.20 mm 7.20 mmWorking Distance (WD) 3.394 mm 3.45 mmCenter Thickness (CT) 5.36 mm 5.36 mmLaser Window Thickness 0.275 mm 0.275 mmLaser Window Material/Index BK7 / 1.517 BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation from a laser diode.

Lens Characteristics Moderate NA for good light capture; large CA for minimum beam divergence.

Typical Products Presentation pointers, small weapons sights, survey instruments, alignment instruments, hand held and fi xed barcode scanners, medical instruments.




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C-0550780

0.40

6.24 mmInfi nite

Diffraction Limited7.20 mm3 455.36 mm0.275 mm

BK7 / 1.517

This lens has been780 nm780 nm

replaced with our 5.00 mm5.00 mm

R HS li t lRoHS compliant glass. R HS li t lInfiniteInfinite

The replacementThe replacementThe replacementDiffraction LimitedDiffractio7 202


3521100.275 mm0.275 mm

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Surface 2

0.881.00

Ø 1.77

Surface 1

Ø 1.60Ø 2.400

Optical Glass Material ECO-550 C-0550

Design Wavelength 780 nm 780 nm

Numerical Aperture (NA) 0.55 0.55

Clear Aperture (CA) 1.60 mm 1.60 mm

Effective Focal Length (EFL) 1.45 mm 1.45 mm

Magnifi cation Infi nite Infi nite

RMS WFE Diffraction Limited Diffraction Limited

Outer Diameter (OD) 2.40 mm 2.40 mm

Working Distance (WD) 0.88 mm 0.88 mm

Center Thickness (CT) 1.00 mm 1.01 mm

Design Objective Collimate or focus laser light.

Lens Characteristics High NA for maximum light capture; small physical size.

Typical Products Fiber to fi ber coupling applications when use with another lens or in pairs.




Surface 2

1.092.00

Ø 2.34

Surface 1

Ø 1.90Ø 3.000











Laser Window Thickness 0.250 mm 0.250 mm

Laser Window Material/Index BK7 / 1.517 BK7 / 1.517

Design Objective Collimate or focus laser light at high magnifi cation from a laser diode.






Surface 2

4.383.48

Ø 4.10

Surface 1

Ø 4.70

Ø 3.40











Laser Window Thickness 0.275 mm 0.275 mm

Laser Window Material/Index BK7 / 1.517 BK7 / 1.517

Design Objective Collimate or focus laser light at high magnifi cation from a laser diode.

Lens Characteristics Low NA for clean circular beam; moderate physical size.

Typical Products Industrial barcode readers, point-of-purchase barcode readers, laser printers, laser fax machines, survey instruments.




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C-0550

780 nm

0 55

1.60 mm

1.45 mm

Infinite

Diffraction Limited

2.40 mm

0 88 mm

1.01 mm

Thi l h bThis lens has been Thi l h b780 nm780 nm

replaced with ourreplaced with our replaced with our0.550.55

RoHS compliant glass. R HS li lR HS li l1.45 mm1.45 mm

The replacementThe replacementThe replacementInfi niteInfi nite

l d ilens code isl d i2 40 mm2 40 mm

3521403521403521400.88 mm0.88 mm

C-0550

780 nm

0.50

2.00 mm

Infi nite

Diffraction Limited

3.00 mm

2.00 mm

0.250 mm

BK7 / 1.517

This lens has been This lens has beenThis lens has been780 nm780 nm



The replacementThe replacementThe replacementDiffraction LimitedDiffraction Limited

3 000


3521503521503521500 250 mm0 250 mm

C-0550

780 nm

0.30

6.16 mm

Infi nite

Diffraction Limited

4.70 mm

3.48 mm

0.275 mm

BK7 / 1.517

This lens has been This lens has beenThis lens has been780 nm780 nm



The replacementThe replacementThe replacementDiffraction LimitedDiffractio

4 707


3521703521703521700 275 mm0 275 mm

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Surface 2

7.975.00

Ø 6.40

Surface 1

Ø 7.215


Lens Characteristics Low NA for clean circular beam; large CA for minimum beam divergence.

Typical Products Industrial bar code readers, point-of-purchase barcode readers, laser printers, laser fax machines, survey instruments.




5.9183.69

Ø 8.62

Ø 9.936Ø 8.68

Surface 2Surface 1



Typical Products Telecommunications.




2.922.94

Ø 5.18

Ø 6.325Ø 4.50

Surface 2Surface 1


Lens Characteristics High NA for maximum light capture; large CA for minimum beam divergence.





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C-0550633 nm

0.255.50 mm11.00 mm

Infi niteDiffraction Limited

7.20 mm7 96 mm5.00 mm0.275 mm

BK7 / 1.517



RoHS compliant glassRoHS compliant glass. RoHS compliant glass11.00 mm

InfiniteInfinite

The replacementThe replacementThe replacementDiffraction LimitedDiffractio7 20 mm7 20 mm


3522200.275 mm0.275 mm

C-0550780 nm


Diffraction Limited9.94 mm5 92 mm3.69 mm0.250 mm

BK7 / 1.517


l d i hreplaced with our l d ith8.00 mm8.00 mm




3522400.250 mm0.250 mm

C-0550780 nm


Diffraction Limited6.325 mm2 91 mm2.94 mm0 25

BK7 / 1.517


replaced with our l d ithl d ith4.95 mm4 95 mm

RoHS compliant glass. RoHS compliant glassRoHS compliant glass4.51 mmInfiniteInfinite



3522300.25 mm0.25 mm

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Surface 2

14.002.20

Ø 5.38

Surface 1

Ø 6.500







Ø 5.84

Ø 6.500

Surface 2Surface 1

17.132.17

Optical Glass Material ECO-550 C-0550Design Wavelength 780 nm 780 nmNumerical Aperture (NA) 0.15 0.15Clear Aperture (CA) 5.50 mm 5.50 mmEffective Focal Length (EFL) 18.40 mm 18.40 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 6.50 mm 6.50 mmWorking Distance (WD) 17.13 mm 17.10 mmCenter Thickness (CT) 2.17 2.20 mmLaser Window Thickness 0.250 mm 0.250 mmLaser Window Material/Index BK7 / 1.517 BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation from a laser diode.






1.763.18

Ø 5.04Ø 6.325 Ø 4.17

Surface 2

Surface 1Optical Glass Material ECO-550 C-0550Design Wavelength 830 nm 830 nmNumerical Aperture (NA) 0.68 0.68Clear Aperture (CA) 5.00 mm 5.00 mmEffective Focal Length (EFL) 3.10 mm 3.10 mmMagnifi cation Infi nite Infi niteOuter Diameter (OD) 6.325 mm 6.325 mmWorking Distance (WD) 1.76 mm 1.76 mmCenter Thickness (CT) 3.18 mm 3.19 mmDesign Objective Collimate or focus laser light.

Lens Characteristics High NA for maximum light capture; large CA for minimum beam convergence.





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C-0550780 nm

0.165.00 mm15.29 mm


6.50 mm14 00 mm2.20 mm0.250 mm

BK7 / 1.517




InfiniteInfinite



3522600.250 mm0.250 mm

C-0550780 nm

0.155.50 mm18.40 mm


6.50 mm17 10 mm2.20 mm0.250 mm

BK7 / 1.517




InfiniteInfinite



3522800.250 mm0.250 mm

C-0550830 nm

5 00 mm3.10 mmInfi nite

1 76 mm3.19 mm

This lens has been Thi l h bThi l h b830 nm830 nm

replaced with our pp 0.680.68

RoHS compliant glass. RoHS compliant glassRoHS compliant glass5.00 mm5.00 mm3 10

Th l tThe replacementTh l tInfiniteInfinitelens code is6.325 mm6.325 mm

3523303523303523301.76 mm1.76 mm

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2.383.64

Ø 4.10Ø 4.700 Ø 3.40

Surface 2Surface 1

Optical Glass Material ECO-550 C-0550Design Wavelength 980 nm 980 nmNumerical Aperture (NA) 0.42 0.42Clear Aperture (CA) 3.70 mm 3.70 mmEffective Focal Length (EFL) 4.50 mm 4.50 mmMagnifi cation Infi nite Infi niteOuter Diameter (OD) 4.70 mm 4.70 mmWorking Distance (WD) 2.38 mm 2.38 mmCenter Thickness (CT) 3.64 mm 3.65 mmDesign Objective Collimate or focus laser light.

Lens Characteristics Moderate NA for good light capture.

Typical Products Fiber coupling applications.




2.693.07

Ø 5.23Ø 6.325 Ø 4.00

Surface 2Surface 1

Optical Glass Material ECO-550 C-0550Design Wavelength 685 nm 685 nmNumerical Aperture (NA) 0.62 0.62Clear Aperture (CA) 5.00 mm 5.00 mmEffective Focal Length (EFL) 4.03 mm 4.03 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 6.325 mm 6.325 mmWorking Distance (WD) 2.69 mm 1.56 mmCenter Thickness (CT) 3.07 mm 3.07 mmLaser Window Thickness 1.20 mm 1.20 mmLaser Window Material/Index K3 / 1.518 K3 / 1.518Design Objective Focus light into an optical disk.

Lens Characteristics High NA for maximum light capture; large CA for minimum beam divergence.


Order Nomenclature352340A AR Coating 400-600 nm352340B AR Coating 600-1050 nm352340C AR Coating 1050-1600nm



2.664.065

Ø 4.200

Surface 1

Ø 4.700

Surface 2

Optical Glass Material ECO-550 C-0550Design Wavelength 980 nm 980 nmNumerical Aperture (NA) 0.53/0.27 (object/image) 0.53 / 0.27 (object / image)

Clear Aperture (CA) 4.0 mm/4.2 mm (object/image) 4.0 mm / 4.2 mm (object / image)

Effective Focal Length (EFL) 2.95 mm 2.95 mmMagnifi cation 2.00 2.00Outer Diameter (OD) 4.70 mm 4.70 mmWorking Distance (WD) 2.66 mm/6.91 mm (object/image) 2.66/6.91 mm (front/back)Center Thickness (CT) 4.065 mm 4.07 mmLaser Window Thickness 0.250 mm 0.250 mmLaser Window Material/Index BK7 / 1.517 BK7 / 1.517Design Objective Finite conjugate operates at (2:1) magnifi cation.

Lens Characteristics High NA for maximum light capture.

Typical Products Laser diode pigtails (SM/MM), laser diode connectors (SM/MM), fi ber-to-fi ber connectors.




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C-0550980 nm

3 70 mm4.50 mmInfi nite

2 38 mm3.65 mm





3523503523503523502.38 mm2.38 mm

C-0550685 nm


Diffraction Limited6.325 mm1 56 mm3.07 mm1 20K3 / 1.518






3523401.20 mm1.20 mm

C-0550980 nm

0.53 / 0.27 (object / image)

4.0 mm / 4.2 mm (object / image)

2 952.00

2.66/6.91 mm (front/back)4.07 mm0.250 mm

BK7 / 1.517


replaced with ourreplaced with our replaced with our.53 / 0.27 (object / image0.27 (object

mm /mm / 4 2 mm (object / im4 2 ( bj / i

p gRoHS compliant glass. o S co p a t g ass2.95 mm2.95 mm

The replacement4.70 mm4.70 mm

lens code islens code islens code is.91 mm (front/.91 mm (front/

4 074 07

35244035 00.250 mm0.250 mm

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1.691.48

Ø 1.800

Surface 2Surface 1

1.69

Optical Glass Material ECO-550 C-0550Design Wavelength 980 nm 980 nmNumerical Aperture (NA) 0.30/0.30 (object/image) 0.30/0.30 (object/image)Clear Aperture (CA) 1.15 mm/1.15 mm (object/image) 1.15/1.15 mm (object/image)

Effective Focal Length (EFL) 1.16 mm 1.16 mmMagnifi cation 1.00 1.00Outer Diameter (OD) 1.80 mm 1.80 mmWorking Distance (WD) 1.69 mm/1.69 mm (object/image) 1.69/1.69 mm (front/back)

Center Thickness (CT) 1.48 mm 1.48 mmDesign Objective Minimize alignment sensitivity; fi nite conjugate operates at (1:1) magnifi cation.

Lens Characteristics Single lens couples light to single mode/multi-mode fi bers; small physical size for fi ber-to-fi ber coupling.





2.733.040

Ø 5.41Ø 6.325

Surface 1 Surface 2

Ø 4.00

Optical Glass Material ECO-550 C-0550Design Wavelength 410 nm 410 nmNumerical Aperture (NA) 0.60 0.60Clear Aperture (CA) 4.80 mm 4.80 mmEffective Focal Length (EFL) 4.00 mm 4.00 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 6.325 mm 6.325 mmWorking Distance (WD) 2.73 mm 1.53 mmCenter Thickness (CT) 3.040 mm 3.04 mmLaser Window Thickness 1.200 mm 1.200 mmLaser Window Material/Index K3 / 1.531 K3 / 1.518Design Objective Focus light through disk onto storage media.

Lens Characteristics High NA for maximum light capture, small size

Typical Products Data storage.



Lens Codes 352673 and 352671, please see page 32.


Surface 2

1.10.88

Ø 1.59

Surface 1

Ø 2.650 Ø 1.70

Optical Glass Material ECO-550 C-0550Design Wavelength 1550 nm 1550 nmNumerical Aperture (NA) 0.50 0.50Clear Aperture (CA) 1.50 mm 1.50 mmEffective Focal Length (EFL) 1.49 mm 1.49 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 2.65 mm 2.65 mmWorking Distance (WD) 1.1 mm 1.10 mmCenter Thickness (CT) 0.88 mm 0.88 mmLaser Window Thickness 0.250 mm 0.250 mmLaser Window Material/Index BK7 / 1.517 BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation.

Lens Characteristics High NA for maximum light capture; small size.

Typical Products Telecommunications




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C-0550980 nm

0.30/0.30 (object/image)1 15/1 15 mm (object/image)

1.16 mm1.00

1.69/1.69 mm (front/back)

1.48 mm


ppp.30/0.30 (object/image.30/0.30 (object/image

RoHS compliant glass. RoHS compliant glassRoHS compliant glass1.15/1.15 mm (object/image)1.15/1.15 mm (object/image)

1 16Th l tThe replacementTh l t1 001 00


3524503524503524509 mm (fron9 mm (fron

C-0550410 nm


Diffraction Limited6.325 mm1 53 mm3.04 mm1.200 mmK3 / 1.518


l d ithreplaced with our l d ith4.80 mm4 80 mm




3526101.200 mm1.200 mm

C-05501550 nm


Diffraction Limited2.65 mm1 10 mm0.88 mm0.250 mm

BK7 / 1.517


replaced with our l d ithl d ith1.50 mm1 50 mm

RoHS compliant glass. RoHS compliant glassRoHS compliant glass1.49 mmInfiniteInfinite



3527100.250 mm0.250 mm

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Lens Code 352-A375 Optical Design SpecificationsDrawing Parameter 352-A375 RoHS

Surface 2

5.816

Ø 6.510

Surface 1

Ø 4.74

2.83

Optical Glass Material ECO-500Design Wavelength 780 nmNumerical Aperture (NA) 0.30Clear Aperture (CA) 4.50 mmEffective Focal Length (EFL) 7.50 mmOptical Glass ECO550Wavefront Error < 0.15 λ RMS (λ = 633 nm)Scratch/Dig 60/40MgF2 AR Coating 95% Transmission (650 nm - 810 nm)Outer Diameter (OD) 6.510 mmWorking Distance (WD) 5.816 mmCenter Thickness (CT) 2.83 mmLaser Window Thickness 0.275 mmLaser Window Material/Index BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation.


Typical Products Laser collimator for telecommunications.

Order Nomenclature 352-A375A AR Coating 400-600 nm352-A375B AR Coating 600-1050 nm

352-A375C AR Coating 1050-1600 nm352A-375M AR Coating MgF2

Direct replacement for Kodak® A375


Surface 2

2.886

Ø 6.000

Surface 1

Ø 5.12

3.102

Optical Glass Material ECO-500Design Wavelength 655 nmNumerical Aperture (NA) 0.53Clear Aperture (CA) 4.89 mmEffective Focal Length (EFL) 4.60 mmOptical Glass ECO550Wavefront Error < 0.1 λ RMS (λ = 633 nm)Scratch/Dig 60/40MgF2 AR Coating 95% Transmission (650 nm - 810 nm)Outer Diameter (OD) 6.00 mmWorking Distance (WD) 2.886 mmCenter Thickness (CT) 3.102 mmLaser Window Thickness 0.275 mmLaser Window Material/Index BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation.




352-A390C AR Coating 1050-1600 nm352-A390M AR Coating MgF2



9.675

Ø 7.200

Surface 1

Ø 6.68

2.076

Surface 2

Optical Glass Material ECO-500Design Wavelength 670 nmNumerical Aperture (NA) 0.30Clear Aperture (CA) 6.59 mmEffective Focal Length (EFL) 11.00Optical Glass ECO550Wavefront Error < 0.1 λ RMS (λ = 633 nm)Scratch/Dig 60/40MgF2 AR Coating 95% Transmission (650 nm - 810 nm)Outer Diameter (OD) 7.20 mmWorking Distance (WD) 9.675 mmCenter Thickness (CT) 2.076 mmLaser Window Thickness 0.275 mmLaser Window Material/Index BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation.




352-A397C AR Coating 1050-1600 nm352-A397M AR Coating MgF2


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Surface 2

11.582.38

Ø 5.85

Surface 1

Ø 6.325

Optical Glass Material D-ZK3Design Wavelength 633 nmNumerical Aperture (NA) 0.20Clear Aperture (CA) 5.20 mmEffective Focal Length (EFL) 13.0 mmMagnifi cation Infi niteOuter Diameter (OD) 6.325 mmWorking Distance (WD) 11.58 mmCenter Thickness (CT) 2.38 mmLaser Window Thickness 0.250 mmLaser Window Material/Index BK7 / 1.517Design Objective Collimate or focus laser light ay high magnifi cation from a laser diode.


Typical Products Laser pointers, laser scanners, barcode readers, survey instruments.



Surface 2

10.572.40

Ø 5.85

Surface 1

Ø 6.325






Surface 2

12.632.349

Ø 5.85

Surface 1

Ø 6.325





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Surface 2

8.132.493

Ø 5.95

Surface 1

Ø 6.325






Surface 2

9.562.434

Ø 5.85

Surface 1

Ø 6.325






Surface 2

9.662.252

Ø 5.40

Surface 1

Ø 6.00





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13.192.922

Ø 4.70

Ø 5.00

Surface 1 Surface 2






Surface 2

4.901.725

Ø 2.60

Surface 1

Ø 3.000

Optical Glass Material D-ZK3 C-0550Design Wavelength 1550 nm 670 nmNumerical Aperture (NA) 0.21 0.21Clear Aperture (CA) 2.50 mm 2.50 mmEffective Focal Length (EFL) 6.00 mm 6.00 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 3.00 mm 3.00 mmWorking Distance (WD) 4.90 mm 4.922 mmCenter Thickness (CT) 1.725 mm 1.725 mmDesign Objective Collimate or focus laser light.



Order Nomenclature354130A AR Coating 400-600 nm354130B AR Coating 600-1050 nm354130C AR Coating 1050-1600nm



Surface 2

4.103.484

Ø 4.10

Surface 1

Ø 4.700

Optical Glass Material DZK-3 C-0550Design Wavelength 633 nm 605 nmNumerical Aperture (NA) 0.30 0.30Clear Aperture (CA) 3.70 mm 3.8 mmEffective Focal Length (EFL) 6.2 mm 6.45 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 4.70 mm 4.70 mmWorking Distance (WD) 4.1 mm 4.38Center Thickness (CT) 3.484 mm 3.46Laser Window Thickness 0.275 mm 0.275 mmLaser Window Material/Index BK7 / 1.517 BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation from a laser diode.

Lens Characteristics Low NA for clean circular beam; moderate physical size.





Discontinuedgg



Discontinuedgg


C-0550670 nm

0 212.50 mm

InfiniteDiffraction Limited

3.00 mm4.922 mm1.725 mm


replaced with ourreplaced with our replaced with our0.210.212 50


The replacementThe replacementThe replacementInfi niteInfi niteDiff i Li i d


3541303541303541304.922 mm4.922 mm

C-0550605 nm


Diffraction Limited4.70 mm

4 383.46

0.275 mmBK7 / 1.517


l d ithreplaced with our l d ith3.8 mm3 8 mm



lens code islens code islens code is4.384.38

3541710.275 mm0.275 mm

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Surface 2

4.370.991

Ø 1.70

Surface 1

Ø 2.00


Lens Characteristics Low NA for clean circular beams; small physical size.





Surface 2

4.871.93

Ø 2.40

Surface 1

Ø 2.79


Lens Characteristics Low NA for clean circular beam; small physical size.





Surface 2

12.112.773

Ø 5.60

Surface 1

Ø 6.325



Typical Products Fiber coupling applications, data storage.




Discontinuedgg



Discontinuedgg



Discontinuedgg


C-05501550 nm

0 151.50 mm


2.00 mm4 361.01 mm






3544303544303544304.36 mm4.36 mm

C-05501550 nm

0 182.20 mm


2.80 mm4 881.93 mm






3545503545503545504.88 mm4.88 mm

C-0550650 nm

0 185.10 mm


6.325 mm12.14 mm2.76 mm

This lens has been Thi l h bThi l h b650 nm650 nm




lens code isl d il d i6 325 mm6 325 mm

35456035456035456012.14 mm12.14 mm

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9.66

2.252

Ø 2.80

Ø 6.325

Surface 1 Surface 2





Lens Codes 354850 and 350850 Optical Design Specifi cationsDrawing Parameter 354850 RoHS 350850

20.412.656

Ø 5.60

Ø 6.325

Surface 2Surface 1

Optical Glass Material D-ZK3 C-0550Design Wavelength 670 nm 670 nmNumerical Aperture (NA) 0.13 0.125Clear Aperture (CA) 5.50 mm 5.50 mmEffective Focal Length (EFL) 22.00 mm 22.00 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 6.325 mm 6.325 mmWorking Distance (WD) 20.41 mm 19.18 mmCenter Thickness (CT) 2.656 mm 2.656 mmLaser Window Thickness 0.250 mm 0.250 mmLaser Window Material/Index BK7 / 1.517 BK7 / 1.517Design Objective Collimate or focus laser light at high magnifi cation.


Typical Products Telecommunications


350850A AR Coating 400-600nm350850B AR Coating 600-1050nm350850C AR Coating 1050-1600nm


2.371.426

Ø 3.40Ø 4.00

Surface 1 Surface 2Optical Glass Material D-ZLaF52LA C-0550Design Wavelength 780 nm 780 nmNumerical Aperture (NA) 0.55 0.55Clear Aperture (CA) 3.00 mm 3.00 mmEffective Focal Length (EFL) 2.73 mm 2.73 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 4.00 mm 4.00 mmWorking Distance (WD) 2.37 mm 2.168 mmLaser Window Thickness 1.200 mm 1.03 mmLaser Window Material/Index Polycarbonate Disk / 1.170 Polycarbonate Disk / 1.20Design Objective Focus light into an optical disk..

Lens Characteristics High NA for maximum light capture, small focused spot.




350850A AR Coating 400-600nm350850B AR Coating 600-1050nm350850C AR Coating 1050-1600nm

Discontinuedgg



Discontinuedgg


C-0550670 nm0.125

5.50 mm22.00 mm


6.325 mm19 18 mm2.656 mm0.250 mm

BK7 / 1.517




InfiniteInfinite



3548500.250 mm0.250 mm

C-0550780 nm

0.553.00 mm2 73Infi nite

4.00 mm2.168 mm1 03

Polycarbonate Disk / 1.20


replaced with our replaced with ourreplaced with our0.55.

3 00 mm3 00

p gRoHS compliant glass. o S co p a t g ass2.73 mm2.73 mm

The replacementDiffraction LimitedDiffraction Limited

lens code islens code islens code is4.00 mmm2 1682 168

355160355 601.03 mm1.03 mm

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4.8091.239

Ø 1.66Ø 2.40

Ø 1.66

1.129

Surface 1 Surface 2

Optical Glass Material D-ZLaF52LA C-0550Design Wavelength 1300 nm 1300 nmNumerical Aperture (NA) 0.43/0.12 (object/image) 0.43 / 0.124 (object /image)Clear Aperture (CA) 1.10 mm/1.24 mm (object/image) 1.13/1.3 mm (object/image)Effective Focal Length (EFL) 1.14 mm 1.14 mmMagnifi cation 3.64 3.64RMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 2.40 mm 2.40 mmWorking Distance (WD) 4.81 mm/1.13 mm (object/image) 1.16/4.93 mm (front/back)Center Thickness (CT) 1.239 mm 1.03 mmLaser Window Thickness 0.30 mm 0.300 mmLaser Window Material/Index BK7 / 1.517 BK7 / 1.517Design Objective Finite conjugate operates at (3.70:1) magnifi cation.

Lens Characteristics Single lens couples light to single mode/multi-mode fi bers; small physical size for fi ber-to-fi ber coupling.

Typical Products Laser diode pigtails (SM/MM), laser diode connectors (SM/MM), fi ber-to-fi ber connectors.




Surface 2

2.161.900

Ø 4.50

Surface 1

Ø 3.70Ø 3.80

Optical Glass Material D-ZLaF52LA C-0550Design Wavelength 830 nm 830 nmNumerical Aperture (NA) 0.55 0.68Clear Aperture (CA) 3.60 mm 3.60 mmEffective Focal Length (EFL) 2.75 mm 2.75 mmMagnifi cation Infi nite Infi niteOuter Diameter (OD) 4.50 mm 4.00 mmWorking Distance (WD) 2.16 mm 1.56 mmCenter Thickness (CT) 1.900 mm 1.90 mmDesign Objective Collimate or focus laser light.






1.562.50

Ø 3.80Ø 4.00

Surface 1

Surface 2

Optical Glass Material D-ZLaF52LA C-0550Design Wavelength 1550 nm 1550 nmNumerical Aperture (NA) 0.60 0.60Clear Aperture (CA) 3.60 mm 3.60 mmEffective Focal Length (EFL) 2.97 mm 2.97 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 4.00 mm 4.00 mmWorking Distance (WD) 1.56 mm 1.56 mmCenter Thickness (CT) 2.50 mm 2.50 mmDesign Objective Collimate or focus laser light at high magnifi cation.






Discontinuedgg



Discontinuedgg



Discontinuedgg


C-05501300 nm

0.43 / 0.124 (object /image)1.13/1.3 mm (object/image)

1.14 mm3.64

Diffraction Limited2.40 mm

1.16/4.93 mm (front/back)1.03 mm0.300 mm

BK7 / 1.517


l d ithreplaced with our l d ith( j g( j

3/3/1.3 mm (object/imag1.3 mm (object/ima


3 643 64


lens code islens code islens code is4.93 mm (front/.93 mm (front/

3552000.300 mm0.300 mm

C-0550830 nm

0 683 60 mm2.75 mmInfi nite

1 56 mm1.90 mm





3553903553903553901.56 mm1.56 mm

C-05501550 nm

0 603.60 mm


4.00 mm1 562.50 mm






3555603555603555601.56 mm1.56 mm

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Lens Code 370060 Optical Design SpecificationsDrawing Parameter 370060

Surface 2

0.2670.80

Surface 1

Ø 2.500 Ø 0.90

Optical Glass Material PBH71Design Wavelength 1550 nmNumerical Aperture (NA) 0.60Clear Aperture (CA) 0.84 mmEffective Focal Length (EFL) 0.682 mmMagnifi cation Infi niteRMS WFE < Diffraction LimitedOuter Diameter (OD) 2.50 mmWorking Distance (WD) 0.267 mmCenter Thickness (CT) 0.80 mmDesign Objective Collimate or focus laser light at high magnifi cation.

Lens Characteristics Very high NA for maximum light capture.


Order Nomenclature 370060Q AR Coating 1300-1700 nm


Surface 2

1.910 0.290

Ø 0.55

Surface 1

1.200

0.35

1.200

FrontView

Optical Glass Material PBH71Design Wavelength 1310 nmNumerical Aperture (NA) 0.55/0.13 (object/image)Clear Aperture (CA) 0.40 mm/0.53 mm (object/image)Effective Focal Length (EFL) 0.382 mmMagnifi cation 4.02RMS WFE Diffraction LimitedOuter Diameter (OD) 0.550 mmEdge Length 1.20 mmWorking Distance (WD) 0.290 mm/1.910 mm (object/image)Center Thickness (CT) 0.35 mmDesign Objective Laser to laser fi ber coupling lens.





Surface 1

Ø 3.000Ø 1.67Ø 2.27

Surface 2

0.201.13

Optical Glass Material PBH71Design Wavelength 1550 nmNumerical Aperture (NA) 0.80Clear Aperture (CA) 1.2 mmEffective Focal Length (EFL) 0.75 mmMagnifi cation Infi niteRMS WFE Diffraction LimitedOuter Diameter (OD) 3.0 mmWorking Distance (WD) 0.2 mmCenter Thickness (CT) 1.13 mmDistance Holder to Laser 0.23 mmLens Holder 304 Stainless SteelDesign Objective Collimate or focus laser light at high magnifi cation.




Direct replacement for: ALPS FLBF1Z001AALPS FLBF1Z101A

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Ø 1.185Ø 1.536

0.290.95

Ø 3.000

Surface 1

Surface 2





Direct replacement for: ALPS FLAM1Z001AALPS FLAM1Z101A


1.111.28

Ø 1.81 Ø 3.000Ø 1.20

Surface 2Surface 1






Surface 2

0.201.13

Surface 1

2.000 ± 0.100

1.050 ± 0.050

Ø 3.600 + 0.000– 0.050

1.000 ± 0.050

2.000 ± 0.020

Ø 1.670

Ø 3.200 + 0.050– 0.020

Optical Glass Material PBH71Design Wavelength 1550/1480 nmNumerical Aperture (NA) 0.80Clear Aperture (CA) 1.2 mmEffective Focal Length (EFL) 0.75 mmMagnifi cation Infi niteRMS WFE Diffraction LimitedOuter Diameter (OD) 1.670 mmWorking Distance (WD) 0.2 mmCenter Thickness (CT) 1.13 mmDistance Holder to Laser 0.23 mmLens Holder 304 Stainless SteelDesign Objective Collimate or focus laser light at high magnifi cation.




Direct replacement for: ALPS FLBN1Z001AALPS FLBN1Z101A

Direct replacement for: ALPS FLAN1Z001AALPS FLAN1Z101A

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Surface 2

0.290.95

Surface 1

2.000 ± 0.100

1.050 ± 0.050

Ø 3.600 + 0.000– 0.050

1.000 ± 0.050

2.000 ± 0.010

Ø 1.765

Ø 3.200 + 0.050– 0.020





Direct replacement for: ALPS FLBM1Z001AALPS FLBM1Z101A


Surface 2

3.361.23

Ø 2.100

Ø 1.82

Surface 1

Ø 3.000






1.7551.41

Ø 2.250 Ø 1.65 Ø 3.000

Surface 2

Surface 1





Direct replacement for: ALPS FLAG1Z001AALPS FLAG1Z101A

Direct replacement for: ALPS FLAE1Z001AALPS FLAE1Z101A

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LightPath’s 352673 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 352673 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 352673 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.

• 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

Lens Codes 352673 and 352671 Optical Design SpecificationsDrawing Parameter 352673 RoHS 352671 RoHS

Surface 2

2.393.02

Ø 5.120Ø 6.325

Surface 1

Ø 5.080

Optical Glass Material ECO-550 ECO-550Design Wavelength 408 nm 408 nmNumerical Aperture (NA) 0.60 0.60Clear Aperture (CA) 4.80 mm 4.80 mmEffective Focal Length (EFL) 4.02 mm 4.02 mmMagnifi cation Infi nite Infi niteRMS WFE Diffraction Limited Diffraction LimitedOuter Diameter (OD) 6.325 mm 6.325 mmWorking Distance (WD) 2.39 mm 2.37 mmCenter Thickness (CT) 3.02 mm 3.036 mmLaser Window Thickness 0.250 mm 0.250 mmLaser Window Material/Index PK2 / 1.497 PK2 / 1.497Design Objective Collimate laser light at high magnifi cation.


Typical Products Data storage.

Order Nomenclature 352673A AR Coating 400-600 nm352671A AR Coating 400-600 nm352671B AR Coating 600-1050 nm352671C AR Coating 1050-1600 nm

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Blue Laser Collimating Lens

Laser Tool Lenses

Lens Code Shape Numerical Aperture

Focal Length(mm)

Outer Diameter(mm)

Clear Aperture(mm)

Working Distance (mm)

354057 Plano-Convex (PCX) 0.20 13.0 6.325 5.2 11.6

354058 Plano-Convex (PCX) 0.22 12.0 6.325 5.2 10.6

354059 Plano-Convex (PCX) 0.19 14.0 6.325 5.2 12.6

354060 Plano-Convex (PCX) 0.30 9.6 6.325 5.2 8.1

354061 Plano-Convex (PCX) 0.24 11.0 6.325 5.2 9.6

354062 Plano-Convex (PCX) 0.24 11.0 6.00 5.2 9.7

354171 Plano-Convex (PCX) 0.30 6.2 4.70 3.7 4.1

354996 Plano-Convex (PCX) 0.30 4.5 3.00 2.7 3.5

LightPath’s D-ZK3 Glass is used for all Laser Tool Lenses.

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.

• 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

Contact LightPath to take advantage of the power of Aspheric Optics for a simpler optical system.

Standard Coatings

MLBB-A Coating: 400 nm - 600 nm

MLBB-B Coating: 600 nm - 1050 nm

MLBB-C Coating: 1050 nm - 1600 nm

MgF2

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.

Please see page 23-37 for detailed descriptions of the above lenses.A

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Glass Aspheres for Laser Tools

Diffractive Zoneon an Aspheric Lens

• Refractive-diffractive design

• Color corrects with a single element


• Custom F/1 and faster achromats available

• High performance, cost effective

LightPath’s line of optical products for minimizing chromatic aberrations using only a single optical element. These new glass, molded aspheric-diffractive 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.

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 color-corrected lens is needed to minimize these effects.

Aspheric Hybrid Optics

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.

Molded In Place (MIP) Lenses

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.

Anamorphic OpticsA

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Asphere Customization Capabilities

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 Specifi cations and Tolerances

Holder Material Stainless Steel 304

Holder Outer Diameter ± 0.025 mm

Holder Inner Diameter ± 0.100 mm

Holder Length ± 0.100 mm

Length of Threaded Section ± 0.100 mm

• Cost effective solution for mounting Geltech aspheres

• Easy to handle optical assembly

• Durable stainless-steel housing

• Threaded extension for easy mounting

• Compact size

For mounts with Fiber Connectors, please see page__.

Ordering Information

Part Number Holder Type EFL (mm) NA D (mm)

352080Y-00-MT MT9 3.89 0.55 2.47

352105Y-00-MT MT9 5.50 0.54 3.331

352110Y-00-MT MT9 6.24 0.4 3.12

352115Y-00-MT MT12 6.75 0.52 4.270

352125Y-00-MT MT14 10.00 0.50 7.505

352140Y-00-MT MT6A 1.45 0.55 0.87

352150Y-00-MT MT8 2.00 0.50 1.02

352170Y-00-MT MT8 6.16 0.3 3.60

352220Y-00-MT MT9 11.00 0.25 7.57

352230Y-00-MT MT9 4.51 0.55 2.59

352240Y-00-MT MT12 8.00 0.5 5.59

352260Y-00-MT MT9 15.29 0.16 13.60

352280Y-00-MT MT9 18.40 0.15 16.70

352330Y-00-MT MT9 3.10 0.68 1.71

352340Y-00-MT MT9 4.03 0.62 2.49

352350Y-00-MT MT8 4.50 0.42 1.61

352440Y-00-MT MT8 2.95 0.27/0.53 2.53

352610Y-00-MT MT9 4.00 0.6 2.42

352673Y-00-MT MT9 4.00 0.6 2.12

352710Y-00-MT MT6B 1.49 0.50 1.10

352-A397Y-00-MT MT9 11.00 0.30 9.915

354560Y-00-MT MT9 13.86 0.18 11.74

355390Y-00-MT MT8 2.75 0.68 1.16

355660Y-00-MT MT8 2.97 0.6 1.26

Lens Holder Design MT6A

1.90

Ø 6.24

3.55

D

M6 x 0.5-6gThread

Lens Holder Design MT6B

M6 x 0.5 - 6gThread

1.97

D

Ø 6.24

3.56

Lens Holder Design MT8

3.20

Ø 8.24

5.85

D

M8 x 0.5-6gThread


3.20

Ø 9.24

6.50

D

M9 x 0.5-6gThread


3.20

Ø 12.22

6.50

D

M12 x 0.5-6gThread


D

Ø 14.25

8.00M14 x 0.75-6g

Thread

**Substitute AR coating letter for Y in the product number.

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Mounted Aspheric Lenses

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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.

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.

• 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

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3521

1035

2220

3522

3035

2240

3522

60

Part Number λ (nm) Beam ø (mm)* AR Coating Thread ø ø (mm) L2 (mm)Nominal

L3 (mm)Nominal

L4 (mm)Nominal

352110 - (FCPC / FCAPC / SMA) - 543 543 1.2 A M11 x 0.5-6 g 11 17.9 21.6 18.1

352110 - (FCPC / FCAPC / SMA) - 780 780 1.3 B M11 x 0.5-6 g 11 18.0 21.7 18.2

352110 - (FCPC / FCAPC / SMA) - 1064 1064 1.4 C M11 x 0.5-6 g 11 18.1 21.7 18.2



352110 - (FCPC / FCAPC / SMA) - Y - KIT A, B, or C M11 x 0.5-6 g 11

























* Typical beam diameter, measured at 1/e2, when using single mode fi ber.NOTE: For -KIT part numbers, Y is equal to AR coating requested.

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Connectorized Aspheric Fiber Optic Collimators

3521

1035

2220

3522

3035

2240

3522

60

FC/PC Connectors FC/APC Connectors SMA Connectors

352110 - FC/PC - λ

L2

M11 Thread Accepts FC/PC Connector

11.00

13.00

352110 - FC/APC - λ

13.00L4

11.00

M11 Thread Accepts FC/APC Connector

352110 - SMA - λ

13.00L3

11.00

M11 Thread Accepts SMA Connector

352220 - FC/PC - λ

L2


11.00

17.10

352220 - FC/APC - λ

17.10L4

11.00


352220 - SMA - λ

17.10L3

11.00


352230 - FC/PC - λ

11.00

Accepts FC/PC ConnectorM11 Thread

9.60L2

352230 - FC/APC - λ

9.60L4

11.00

Accepts FC/APC ConnectorM11 Thread

352230 - SMA - λ

9.60L3

11.00

Accepts SMA ConnectorM11 Thread

352240 - FC/PC - λ

12.70L2

12.00


352240 - FC/APC - λ

12.70L4

12.00


352240 - SMA - λ

12.70L3

12.00


352260 - FC/PC - λ

11.00


20.20L2

352260 - FC/APC - λ

20.20L4

11.00


352260 - SMA - λ

20.20L3

11.00

Accepts SMA ConnectorM11 Thread

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Connectorized Aspheric Fiber Optic Collimators

LightPath is a recognized world leader in press molded aspherical optics. Traditionally, these aspheric lenses have been limited to visible and near-infrared wavelengths. Recent advances in optical materials now provide a common technology path to produce mid and long-wavelength 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.

• 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

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-the-shelf 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.

Mid to Long Wavelength Infrared Aspheres

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 time-consuming 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.

LightPath specializes in producing custom lens and lens assembly designs in a short time frame.

Custom Black Diamond™ Infrared Lenses

Wavelength of Application microns

Numerical Aperture or f/# or Laser

Clear Aperture mm

Effective Focal Length mm

Working Distance mm

Mechanical Restraints

Infra

red

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Refractive Indices and Absorption Coeffi cient

Index λ (μm) Absorption (cm-1)

2.6266 3 0.01

2.6210 4 0.01

2.6173 5 0.01

2.6142 6 0.01

2.6117 7 0.01

2.6088 8 0.01

2.6055 9 0.01

2.6023 10 0.01

2.5983 11 0.03

2.5942 12 0.13

2.5892 13 0.20

2.5843 14 0.20

Mechanical Properties

Density 4.67 g/cm³

Hardness 150 knoop

Young's Modulus 22.1 GPa

Thermal Properties

Tg 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

LightPath lenses that havea 390xxx prefi x use the

BD-2 IR glass.

BD-2 Uncoated Transmission Curve (5 mm thickness)

0%

20%

40%

60%

80%

100%

1 2 3 4 5 6 7 8 9 10 11 12 13 14

% T

rans

mis

sion

Wavelength (μm)

Infr

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Black Diamond™ Infrared Glass Data (BD-2)

Available Coatings

Coating Range (μm) RAVG

IR-1 7 - 14 < 1.0% per side

IR-3 2 - 6 < 0.6% per side

IR-4 1.75 - 3 < 1.0% per side

IR-1Typical Reflectance Curve (spec: 7-14 μm)

IR-3Typical Reflectance Curve (spec: 2-6 μm)

IR-4Typical Reflectance Curve (spec: 1.75-3 μm)

1.75 2.00 2.25 2.50 2.75 3.00

0.0

1.0

2.0

3.0

4.0

5.0

Wavelength (µm)

% R

efle

ctan

ce

Infra

red

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Black Diamond™ Infrared Glass Data (BD-2)

• High numerical aperture for max collection effi ciency

• Compact, single lens design


• 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.

MWIR & LWIR Collimating Lenses

Lens Code 390036

Ø 6.500

Surface 2

3.05

Surface 1

2.5

Ø 5.55

Optical Glass Material BD-2

Design Wavelength 2.5 m

Numerical Aperture (NA) 0.56

Clear Aperture (CA) 5.00 mm

Effective Focal Length (EFL) 4.0 mm ± 1%

Magnifi cation Infi nite

RMS WFE < Diffraction Limited

Outer Diameter (OD) 6.50 mm

Working Distance (WD) 3.05 mm

Center Thickness (CT) 2.5 mm

Lens Code 390037

Ø 5.500

Surface 2

0.723

Surface 1

3.0

Ø 4.51

Optical Glass Material BD-2

Design Wavelength 7 m



Effective Focal Length (EFL) 1.873 mm ± 1%

Magnifi cation Infi nite

RMS WFE < Diffraction Limited


Working Distance (WD) 0.723 mm

Center Thickness (CT) 3.0 mm

Mounted MWIR/LWIR390036XX-MT 390037XX-MT General Specifications and Tolerances

Ø 9.25 Ø 5.50 Ø 7.00Ø 7.50

6.25

M9 x 0.5-6 g Thread

5.33

Ø 9.240 Ø 4.74 Ø 6.10Ø 7.66

M9 x 0.5-6 g Thread Holder Material Stainless Steel 304

Holder Outer Diameter ± 0.025 mm

Holder Inner Diameter ± 0.100 mm

Holder Length ± 0.100 mm

Length of Threaded Section ± 0.100 mm

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Custom Lens Assembly Specifi cations

micronsWavelength of Application

f/#

Field of View (FOV) degrees

Effective Focal Length mm

MTF lp/mm% @

Detector Type

Mechanical Interface

Detector Pixel Size microns

Detector # of Pixels x

Working Distance mm

Environmental Constraints

• 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 7100109: Athermalized Black Diamond™ Lens Assembly

Drawing Optical Properties

Image Plane

M25 x 0.54.0 Long

12.0

Ø 27.4

5.6

10.44Rear Vertex

14.1Front Vertex

27.8

17.6

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

Mechanical Properties

Weight 25 g

Lens Mount M25 x 0.5

Environmental PropertiesOperating Temperature -40°C to +85°C

Infra

red

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Infrared Lens Assemblies

General GRADIUM® Lens Specifi cations

Design Wavelength 546 nm

Operating Temperature -20ºC to +200ºC

Storage Temperature -40ºC to +300ºC

Outer Diameter (OD) Tolerance ± 0.250 mm

Center Thickness (CT) Tolerance ± 0.100 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

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.

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 been applied as simple singlets or doublets in complex multi-element systems. They have been 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.

GRADIUM® lenses provide a cost-effective solution for many high-performance applications.

Standard spherical lenses suffer from spherical aberration, which artifi cially limits the focused spot size.

Standard Spherical Lens

GRADIUM® Lens

GRADIUM’s® unique refractive index profi le bends rays while traveling through the lens, resulting in a better focused, smaller spot.

• 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

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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

Typical Spot Diagram

Stacked Glass Layers(of varying refractive indexes)

Gradient Index Lens Blank(of varying refractive indexes)

Refractive index profi le ofdiffused gradient lens blank

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

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GRADIUM® Lenses

Plano-Convex (GPX)

EFL

BFL

CT

ODCA

Bi-Convex (GBX)

EFL

BFL

CT

ODCA

Meniscus (GMN)

EFL

BFL

ODCA

CT

Achromatic Doublet (GAD)

EFL

BFL

CT

ODCA

Lens CodeOuter

Diameter(mm)

ClearAperture

(mm)F/#

EffectiveFocal

Length(mm)

CenterThickness

(mm)

BackFocal

Length(mm)

Stan

dard

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GPX-5-5 5.00 4.00 1.0 5.0 2.9 3.09

GPX5-10 5.00 4.50 2.2 10.0 3.0 8.23

GPX6.3-6.19 6.30 5.67 1.0 6.19 2.6 4.65

GPX10-10 10.00 9.00 1.1 10.0 3.0 8.00

GPX10-12.5 10.00 9.00 1.4 12.5 3.0 10.68

GPX10-18 10.00 9.00 2.0 18.0 2.5 16.52

GPX10-22 10.00 9.00 2.5 22.0 2.5 20.54

GPX10-25 10.00 9.00 2.8 25.0 2.5 23.55

GPX10-30 10.00 9.00 3.3 30.0 2.5 28.53

GPX15-15 15.00 13.00 1.1 15.0 4.2 12.24

GPX15-25 15.00 13.50 1.8 24.14 3.0 22.42

GPX15-40 15.00 13.00 3.0 40.0 2.0 38.83

GPX20-60 20.00 18.00 3.3 60.0 6.0 56.49

GPX25-60 25.00 22.00 2.6 60.0 6.0 56.46

GPX25-80 25.00 22.00 3.5 80.0 4.0 77.69

GPX30-60 30.00 27.00 2.2 60.0 6.0 56.44

GPX30-70 30.00 27.00 2.6 70.0 6.0 66.47

GPX40-80 40.00 36.00 2.2 80.0 6.0 76.47

GPX50-100 50.00 45.00 2.2 100.0 8.0 94.90

GPX50-125 50.00 45.00 2.8 125.0 8.0 120.37

GPX50-160 50.00 45.00 3.6 160.0 8.0 155.25

GPX80-125 80.00 72.00 1.7 125.0 12.25 116.91

Bi-

Con

vex GBX30-40 30.00 27.00 1.5 40.0 5.76 36.72

GBX50-80 50.00 45.00 1.8 80.0 8.0 75.46

Ava

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Plan

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x

GPX5-12.5 5.00 4.00 2.8 12.5 2.0 11.30

GPX6.35-12.5 6.35 5.715 2.2 12.5 2.0 11.31

GPX10-40 10.00 9.00 4.5 40.0 2.0 38.84

GPX12.5-35 12.50 11.25 3.0 33.49 3.0 31.74

GPX20-50 20.00 18.00 2.8 50.0 3.0 48.24

GPX25-40 25.00 22.50 1.8 40.08 6.0 36.55

GPX25-50 25.00 22.50 2.2 50.16 6.0 46.62

GPX25-125 25.00 22.50 5.6 125.0 6.0 121.50

GPX27-70 27.00 24.30 2.8 66.63 6.0 63.13

GPX27.82-65 27.82 25.038 2.6 63.97 6.0 60.47

GPX27-100 27.00 24.30 4.0 96.46 6.0 93.02

GPX30-80 30.00 27.00 3.0 80.0 4.0 77.68

GPX30-100 30.00 27.00 3.7 100.0 6.0 96.53

GPX40-100 40.00 36.00 2.8 100.0 6.0 96.56

GPX40-125 40.00 36.00 3.5 125.0 6.0 121.52

GPX40-150 40.00 36.00 4.2 150.0 6.0 146.49

GPX50-150 50.00 45.00 3.3 150.0 8.0 145.25

GPX50-200 50.00 45.00 4.5 200.0 8.0 195.27

Bi-C

onve

x GBX20-40 20.00 18.00 2.2 40.0 4.6 37.54

GBX25-40 25.00 22.00 1.8 40.0 4.6 37.51

GBX30-50 30.00 27.00 1.84 49.97 5.0 47.50

GBX80-255 80.00 72.00 3.38 241.37 10.0 236.83

Ach

rom

at GAD5-15 5.00 4.00 3.3 15.0 4.0 13.07

GAD10-20 10.00 9.00 2.2 20.0 6.0 17.17

GAD25-50 25.00 22.00 2.2 50.0 11.0 44.37

ME GMN30-50 30.00 27.00 1.9 50.0 5.0 46.82

*Additional charges and longer lead time may apply for these designs.

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GRADIUM® Lenses

Available Anti-Refl ective Coatings

Available Coatings* Wavelength Refl ectivity per Surface %

Broa

d Ba

nd

-BB3 1000-1600 nm < 0.50 Average

-BB4 1500-2500 nm < 0.50 Average

Dua

l Ban

d

-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

VC

-VC1 488 nm < 0.25 Maximum








-VC10 1550 nm < 0.25 Maximum

-VC11 2000 nm < 0.25 Maximum

*Additional charges and longer lead time may apply for these coatings.

Standard Anti-Refl ective Coatings

Coating Code Wavelength Refl ectivity per Surface %

Broa

dBa

nd

-BB1 400-700 nm < 0.5 Average

-BB2 650-1000 nm < 0.5 Average

Dua

lBa

nd

-DB3 1310/1550 nm < 0.25 Maximum

-DB5 808/940 nm < 0.25 Maximum

VC -VC8 1064 nm < 0.25 Maximum

For a more detailed list of parameters, please visit our website at www.lightpath.com or contact LightPath at 1-800-472-3486 to discuss your particular

requirements.

LightPath would be happy to design a custom GRADIUM® lens to

your individual specifi cations. The typical required parameters for

custom GRADIUM® lenses are:

nmWavelengths of Interest

Effective Focal Length (EFL) mm

Beam Quality

Anti-Refl ective Coating

Refl ectivity

nmWavelength Range —

Laser Beam Diameter mm

Back Focal Length (BFL) mm

Outer Diameter (OD) mm

Clear Aperture (CA) mm

Laser Power

Customization

Standard Coating Curves

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GRADIUM® Lenses

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.

• Low cost RoHS Compliant Isolators

• Epoxy free optical path available

• Flexible optical and physical design

• Design variations without major process or tooling changes

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.

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)

203040506070

-20 -10 0 10 20 30 40 50 60 70 800.1

0.2

0.3

0.4

Temperature °C

Isol

atio

n (d

B)

Inse

rtio

n Lo

ss (d

B)

Isolation @ 1528 Isolation @ 1548 Isolation @ 1567 Insertion Loss

1.5 Stage (non-latching garnet)

203040506070

-20 -10 0 10 20 30 40 50 60 70 800.1

0.2

0.3

0.4

Temperature °C

Isol

atio

n (d

B)

Inse

rtio

n Lo

ss (d

B)

1.5 Iso @ 1528 1.5 Iso @ 1548 1.5 Iso @ 1567 Insertion Loss

Double Stage (non-latching garnet)

203040506070

-20 -10 0 10 20 30 40 50 60 70 80Temperature °C

Isol

atio

n (d

B)

0.1

0.2

0.3

0.4

Inse

rtio

n Lo

ss (d

B)

Dbl Iso @ 1528 Dbl Iso @ 1548 Dbl Iso @ 1567 Insertion Loss

Typical Temperature and λ Dependence

Op

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Iso

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Optical Isolator Capabilities

• Small form factor• Laminate core• Solder or epoxy attach • Suitable for pick-and-place assembly

W

H

A

CA

L

Input & Wavelength Indicator

Surface Mount Isolators

• Small form factor• Laminate core• Solder or epoxy attach • Sub-mount thickness determines optical axis height

6°

W

L


CA

H

A0.75

Sub Mount Isolators

• Epoxy free core optical path• Laser welded construction

L


W

CAH

A

Optical Tilt 4

Micro Fixture Isolators

• Metro, access, long haul and hybrid fi ber coax

• High volume wafer-scale manufacturing

• High isolation, low insertion loss

• Square form factor for ease of mounting

• One stage, 1.5 stage, and double stage isolation

Oasis™ provides a compact solution by combining both an aspheric lens and an isolator. Built as a monolithic design, it offers diffraction limited performance optics along with outstanding isolation. The designs are ideal for small form factor laser diodes in both single and multi-channel confi gurations.

The Surface Mount confi guration offers smaller form factors and exceptional value. The typical Surface Mount Oasis™ contains a 0.55 NA Finite Conjugate lens that couples a laser directly into a single mode fi ber. As with all of our products, LightPath offers extensive support to our customers in designing and manufacturing custom confi gurations. These would include a wide selection of aspheric lenses and single, 1.5, and double stage isolation.

Oasis™ Surface Mount

Drawing Lens Parameter Sample Value

L

H

AH

W

CA

Design Wavelength 1550/1480 nm



Effective Focal Length (EFL) 0.382 mm

Magnifi cation 4.02

RMS WFE Diffraction Limited


Working Distance (WD) 0.290/1.91 mm

Distance Lens to Laser 0.290 mm

Oasis™ Monolithic Isolator & Aspheric Lens

The Tx™ Isolators are manufactured with a latched garnet, which eliminates the need and extra cost associated with traditional magnet. Latched garnet has the orientation of its magnetic dipoles frozen by poling in an external magnetic fi eld at an elevated temperature.

Tx™ isolators require lower post processing temperatures. If temperatures in your process are higher than 150 degrees centigrade, please contact LightPath to discuss your requirements with our product engineers.

Tx™ Isolators

Many of today’s transmitters require optical isolators to eliminate back refl ections and feedback in the laser diode. This feedback and noise creates jitters in the system. LightPath’s Tx™ Isolators are manufactured in a very economical and scalable process.

By utilizing a wafer based platform, you can be assured of premium performance at an outstanding value. LightPath’s processes allow manufacturing, test, and inspection on hundreds of isolators in wafer format.

Op

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Optical Isolator Capabilities

2603 Challenger Tech CourtSuite 100Orlando, Florida 32826Phone: +1 (407) 382-4003Toll Free: +1 (800) 472-3486Fax: +1 (407) 382-4007www.lightpath.com

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