Letter from the President

Thank you for looking to LightPath Technologies Inc. (NASDAQ: LPTH) for youroptical product needs. LightPath has been in business since 1985 innovating andproducing optical products for a broad range of market applications including
industrial, communications, medical, defense, test and measurement. Headquartered in
Orlando, Florida we design, develop, manufacture, and distribute optical components
and assemblies, utilizing the latest optical processes and advanced manufacturing
technologies. LightPath produces components and assemblies incorporating Precision
Molded Optics, High Performance Collimators, Isolators, GRADIUM® Glass Lenses andFiber Fusion Technology.

In 2000, LightPath Technologies acquired Geltech, Inc. and Horizon Photonics, Inc. bothleaders in the automated production of optical components. Geltech was recognizedin the optics industry for their glass Precision Molded Optics technologies. Horizon
Photonics was well known in the communications industry for delivering highly
integrated passive optical components for laser packages. The new LightPath
combines these capabilities with its own technologies, bringing a wealth of expertiseto 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, many other opticalapplication areas. As industry needs change, LightPath’s state-of-the-art R&D isdesigning optical solutions to meet the challenges that accompany a changing
environment. We pride ourselves on high performance, customer support, quality
products, value added designs and cost effective volume manufacturing.

We look forward to working with you on your next optical design.

Sincerely,

Ken Brizel
President & CEO
LightPath Technologies, Inc.

CONTENTS

2603 Challenger Tech Court
Orlando, Florida 32826
Phone 1-800-GRADIUM
Phone 1-407-382-4003
Fax 1-407-382-4007

Page

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Integrated Optical Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Aspheric Lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Aspheric Lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Tx Aspheric™ Glass lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mounted Aspheric Lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Circulight™ Optics –Laser Diode Beam Circularization Optics . . . . . . . . . . . . . . . 19
Aspheric Lens Arrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GRADIUM® Lenses – Cost Effective Aspheric Like Performance . . . . . . . . . . . . . 22
GRADIUM® DuraYAG™ Optics Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Collimators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Large Beam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291064nm Fiber Collimators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Connectorized Aspheric Collimators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Small Beam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Optical Isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Cylindrical Isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Tx Isolators™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Surface Mount Isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Sub Mount isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Micro Fixture Isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Oasis Products - Monolithic Isolator and Aspheric Lens . . . . . . . . . . . . . . . . . . . . 37

Introduction
MARKETS WE SERVELightPath Technologies Inc. is a recognized leader in optical solutions
for medical, industrial, communications, defense, test and measurement
applications. Since 1985, LightPath has built a strong portfolio of opticalcomponents and technologies that serve these industries. The products
we produce include a wide spectrum of molded glass aspheric optics
ranging in size from 0.25mm to 10mm. GRADIUM® lenses, which give theperformance of an asphere, are available for lenses between 5mm and100mm. LightPath also offers a full range of aspheric collimators.
All of our aspheric products have an anti-reflective coating covering abroad range of wavelengths. Optical isolators and wavelength lockers
round out our portfolio of components. LightPath not only supplies
components, but also offers the ability to combine optical elements into a

Industrial

complete assembly, providing full engineering support for both optics andMany of the worlds top automobile manufacturers use LightPath’s
GRADIUM® lenses and lens systems to focus their Nd: YAG lasers forautomated welding and cutting operations. Our 1064nm Large Beam
Collimators have also proven to be key for fiber delivery applications at highpower. Molded glass aspheres are used in barcode scanning and package
handling systems by the major shippers worldwide. The top computer-toprint manufacturers use our aspheric molded optics for unmatchedperformance.

mechanics.
Unlike some independent optical engineering firms, LightPath uses anintegrated approach. Our optical and mechanical engineers work directlywith our customers on their optical system requirements. This enables thefinished application to obtain the highest level of optical integration,
minimizing time, size and cost while ensuring quality, performance andMedicalmanufacturability. With LightPath’s automation capabilities, when your

When optimal performance is paramount, glass aspherical lenses are used for
medical imaging systems and procedures requiring laser cutting and healing.
GRADIUM® lenses and molded glass aspheres are found in many analytical
instruments measuring different body functions in both the operating roomand the lab. LightPath also provides lenses and collimators to the world’s top
manufacturers of endoscopes, providing a very wide field of view in a verysmall lens. We work with many companies in biotechnology developing new
optics and optical systems in the fields of genetics, DNA, and protein analysis.

product is ready for full production we are ready to take you there. The
results are lower costs, higher performance, and greater consistency.
LightPath is an ISO 9001 certified supplier.

OPTICAL PRODUCTS WE PRODUCE

Defense and Government
Over the last 10 years, LightPath has provided large volumes of lenses todefense contractors for many simulation training programs, which train ourarmed forces using lasers instead of bullets. Smart bombs and munitions
utilize aspheres for communication and distance measurement. Under adevelopment 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.

Communications

●
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●
●
●
●

LightPath products have been developed for a variety of communications
applications in both Telecom and Datacom. Our lenses, collimators andisolators are used to maximize light efficiency while minimizing both size andcost. Applications including muxdemux, switching and routing, amplification,
dispersion compensation, sensing, transmitters, receivers and transponders
all require the products and performance LightPath provides to move thelight on and off the fiber.

Integrated Optical Subassemblies
Molded Glass Aspheres
Optical Assemblies
GRADIUM® (Larger Optics with Aspherical Performance)
Collimators
Isolators
Traditional Optics

Measurement
For optical measurement systems our lens designs offer customers a variety
of sizes over a wide spectrum and integrated solutions enabling morecompact designs at lower cost.

1Integrated Optical Assemblies●

Design and development●

Large capacity in-house production of optical components – Aspheres, Isolators, Collimators and Lenses●

Pilot product●

Automated production●

Automated laser welding●

Pick and place●

Automated optical alignment●

Automated test●

Reliability and failure analysis●

ISO 9001:2000 Registered

LightPath provides complete optical solutions for many of today’s sophisticated optical system requirements. Utilizing our expertise in design, engineering,
manufacturing and automation, LightPath obtains the highest level of optical integration. We have some of the industry’s best optical designers and applicationengineers on staff, providing our customers with the most cost effective, manufacturable solutions. LightPath’s optical experience covers industrial, medical,
communication, defense, test and measurement applications.

Capabilities
Design & Development
Mechanical & thermal: AutoCAD, Solidworks, Cosmos, Pro Engineer
Optical: Zemax,TracePro, BeamPROP, OptiCAD

Pilot Production
Tool & die shop, single point diamond turning, EDM, wire bond, diebond, seam seal, silicon bench metalization, laser weld, laser solder,glass frit, resin-free & adhesive bondVolume Manufacturing & Test
Large volume Aspheric Lens manufacturing 12,000 lenses per week
6 laser welders, 10 robots, 4 epoxy auto-dispensers, 3 wafer saws

Reliability & Failure Analysis
Telcordia and MIL STD qualification testing

Quality Assurance & Continuous Improvement
ISO 9001: 2000 Registered
By leveraging our design for manufacturing capabilities with our broad optical component portfolio, LightPath has a track record for implementing sophisticatedintegrated optical assemblies. One example is the wavelength locker, combining optical elements such as etalons and beam splitters with photodiodes andthermistors. Automated component placement, alignment and testing enable the assembly process.

2Integrated Optical Assemblies
LightPath also produces optical assemblies such as complex laser sub-mounts.
These assemblies integrate our molded glass aspheres, isolators, laser diodechips and reference photodiodes. These assemblies are aligned to give thecustomer the highest coupling efficiency while providing a path that allows
customers to focus on their core business.

LightPath has a unique position in the world of transceivers. In today’scommunications environment, many of the applications are looking for better
coupling efficiency for both SM and MM fiber. As the local and private area
networks expand into the metro arena, the goal is to keep the costs low, while
maintaining high coupling efficiency for transmission greater than 12km.
LightPath aspheric lenses can be provided coupled with an isolator andmounted in a TOSA assembly for final alignment by the customer, or can be
manufactured as a complete assembly utilizing a customer specified diode.

Telescope and Lens Train assemblies are anotherproduct routinely designed and manufactured for many
optical applications. By utilizing Molded Glass Asphericlenses, GRADIUM® optics, or classically ground andpolished singlets or doublets, LightPath provides thehighest performance achievable, at the lowest cost forour customers’ design constraints.

LightPath is an optical solutions company providing a broad range of expertiseand know-how for solving opto-mechanical problems. We can take a designfrom concept to finished production quickly and cost effectively.

3

Aspheric Lenses●

All-glass●NA up to 0.83●

Diameters as small as 0.250mm●

Diffraction-limited performance●

Available with housings

For today’s sophisticated and compact laser systems, aspheres are the mostpowerful lenses for managing laser light. In these systems, spherical aberrationis the most prevalent performance detractor. It arises from the use of
spherical surfaces and artificially limits focusing and collimating accuracy.

Although it has been known for centuries that spherical geometry is not
optimum for refracting light, the expense of fabricating non-spherical(aspheric) surfaces has inhibited their use.

With the breakthrough ofLightPath’s glass molding technology, this optimal lens geometry has becomea reality.

Spherical vs. Aspherical Lens Systems
Spherical System

Molded lenses are used in a variety of photonic products: barcode scanners,
laser diode to fiber couplings, optical data storage, and medical lasers, to namea 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 benefits 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 Lens

aspheric lenses at practical prices for system designers. Molding is the mostWorking
Distance

consistent and economical way to produce aspheres in large volumes.

CenterThickness

Aspheresprovide elegant
single-element
simplicity

Small and lightweight, our aspheres collimate or focus light as a single element.
This means less complex systems, fewer alignment requirements, less re-work
Laser
Windowand shorter assembly time. They are molded, therefore the lenses haveexcellent piece-to-piece uniformity. They are made of glass, which is the mostClear Aperture
Outer Diameter

durable optical material available, capable of withstanding repeated cleanings

Edge
Thicknessand performing at specifications despite extreme temperature and moisturevariations.

4Aspheric Lenses
Optical Performance

Diffractive Hybrid Lenses

The primary optical specification is the root-mean-squared transmitted

By combining a refractive aspheric lens with a diffractive feature on one

wavefront error (RMS WFE). It is measured on a phase shift interferometersurface, you can do sophisticated beam shaping on your laser light. You canat the wavelength of 632.8nm. Most of our lenses are guaranteed to bealso use diffractive hybrid lenses to make your system achromatic over a range

diffraction limited, which means the RMS WFE < 0.070 λ at the designof wavelengths.

wavelength.

particular application.

Shapes and Sizes

Lens Design Formula

LightPath aspheric lenses can be made plano convex or bi-convex, with•

Positive radius indicates the center of curvature is to the rightdiameters as large as 10mm or as small as 0.250mm. Additionally, we have the•

Negative radius indicates the center of curvature is to the left

capability to dice the lenses to rectangular or square shapes to make mounting•

Dimensions are given in mm

LightPath hybrid lenses are custom designed to eachthem in your system easier.

Numerical Aperture
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 isimportant 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 areimportant when you need to focus light down to a small spot size or whenz=

SAG as a function of Y

R=

Radius of curvaturek=

Conic constantA4=

4 th order aspheric coefficientA6=

6 th order aspheric coefficientA8=

8 th order aspheric coefficient

A 10 =

10 th order aspheric coefficient

A 12 =

12 th order aspheric coefficient

you need the maximum light capture from a diode laser. High numericalaperture applications include data storage and industrial printing.

Custom Optics
Our catalog details 37 standard types aspheric lenses that are available off-the-Lens Holders

shelf. If you do not see a lens that fits your particular application, we will be

Several of our catalog lenses are available pre-mounted in metal holders. We

happy to design one for you. Our sales and engineering teams work closely

can epoxy our lenses into Stainless Steel or Kovar mounts so you can weld
them directly into your system.

together to assist you in design, prototyping, and production of custom glass

Using our new Mold-In-Place (MIP)

aspheric lenses.

technology, we can actually mold the lens directly inside of a steel holder,

LightPath offers custom lens solutions for high volume

manufacturing at prices equal to that of a standard off-the-shelf lenses. We

eliminating the need for adhesives in your package.

pride ourselves on being the fastest custom lens designers in the industry.

5Aspheric Lenses
The Glass

REFRACTIVE INDEX CHART

LightPath Technologies manufactures aspheric lenses using two different types of glass.

Wavelength (nm)Transmittance of both glasses is very good over a large wavelength spectrum. The optimum

404.7

1.625902.00599

operating temperature should be less than 200 degrees Centigrade. The best cleaning agents

435.8

1.62016

1.98112are high purity grades of alcohol or acetone, lightly wiped off with a soft optical tissue or cotton-

480.0

1.61411

1.95665

tipped swab.

486.1

1.61341

1.95392546.1

1.60786

1.93306

587.6

1.60500

1.92286632.8

1.60251

1.91427643.8

1.60198

1.91247

Corning developed a special glass to allow production of highly sophisticated aspheric lenses

656.3

1.601411.91057

that are cost effective. The code for this glass is C0550, and its low dispersion (nd=50.40) is key

706.5

1.59940

1.90397

The 350xxx Series of Lenses

C0550

PBH71

852.1

1.59528

1.89126

1014.01.59227

1.88298

1300.01.58850

1.874441550.01.58572

1.86954

For aspheric lenses that require a glass with a higher index of refraction, LightPath also offers

Abbe Number (νd)

50.40

21.29

lenses made from Ohara PBH71 glass. Its high index (nd=1.92286) allows designers to minimize–6

CTE (10 / ºC)

15.0

8.9

aberrations in lenses with high numerical apertures. It has the added benefit of a lower

dn/dT (10–6 / ºC)

-11.0

13.1

for many applications. In durability, it is equivalent to Corning BCD C2060 or Schott SK16.

The 370xxx Series of Lenses

coefficient of thermal expansion.
Typical Transmission for C0550 and PBH71
100%

Standard Antireflective Coatings

75%

LightPath offers a variety of multilayer broadband coatings to reduce the back reflection from a

50%

nominal 6% for uncoated lenses. The choice of which AR coating is appropriate depends on

25%

the type of glass the lens is made from and the wavelength at which the lens will be used.

0%
400

600

900

1200

1500

1800

Typical AR Coating Curves for C0550

350xxx Series of Lenses
MLBB-A coating: RMAX<1.0%, RTYP<0.4%, from 400-600nm, AOI=0˚%R

MLBB-B coating: RMAX<1.0%, RTYP<0.4%, from 600-1050nm, AOI=0˚
MLBB-C coating: RMAX<1.0%, RTYP<0.4%, from 1050-1600nm, AOI=0˚
MLBB-D coating: RMAX<0.25%, RTYP<0.15%, from 1300-1700nm, AOI=0-20˚

2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0

MLBB-CMLBB-B

MLBB-A

MLBB-D400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

370xxx Series of Lenses
Typical AR Coating Curves for PBH71

MLBB-Q coating: RMAX<0.25%, RTYP<0.15%, from 1300-1700nm, AOI=0-20˚

MLBB-O coating: RMAX<1.0%, RTYP<0.4%, from 600-1050nm, AOI=0˚
MLBB-P coating: RMAX<1.0%, RTYP<0.4%, from 1050-1600nm, AOI=0˚%R

Optional coatings are available. Please contact your sales representative fordetails on the following availability.

2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0

MLBB-Q

600

6

700

800

900 1000

1100

1200

1300

1400 1500

1600

1700

Aspheric Lenses
STANDARD LENSES
NA

EFL (mm)

CA (mm)

OD (mm)Lens Code

0.15

5.00

1.50

2.00

350430

0.15

18.40

5.50

6.50

350280

0.16

15.29

5.00

6.50

350260

0.17

4.00

1.37

3.00

370940

0.18

6.10

2.20

2.80

350550

0.18

13.86

5.10

6.325

350560

0.25

11.00

5.50

7.20

350220

0.30

6.16

3.70

4.70

350170

0.30

1.16

1.15

1.80

350450

0.30

1.80

1.08

3.00

370890

0.40

6.24

5.00

7.20

350110

0.42

4.50

3.70

4.70

350350

0.43

1.14

1.13

2.40

350200

0.47

4.47

4.20

5.42

350022

0.50

1.49

1.50

2.65

350710

0.50

2.00

2.00

3.00

350150

0.50

8.00

8.00

9.94

350240

0.53

2.95

4.00

4.70

350440

0.55

1.45

1.60

2.40

350140

0.55

2.72

3.00

4.00

350160

0.55

3.89

4.29

6.325

350080

0.55

4.51

4.95

6.325

350230

0.55

0.382

0.40

1.20

370631

0.59

0.45

0.52

1.80

350620

0.60

0.682

0.84

2.50

370060

0.60

0.70

0.84

2.50

370880

0.60

2.97

3.60

4.00

0.60

4.00

4.80

6.325

Guaranteed Performance\

LightPath’s aspheric lenses
are inspected and opticaltested to ensure complete
customer satisfaction. Visualcosmetic inspection is
preformed on 100% of alllenses per MIL-PRF-13830B
with a scratch/dig spec of
40/20. Other inspection
criteria including 80/40,
20/10 and 10/5 can beprovided on request.
Optical performance is guaranteed by test methods utilizing aninterferometer measuring transmitted RMS wavefront error listed in theindividual lens specification. LightPath can also perform customized opticaltests in order to screen for the customers’ specific application criteria.
Tolerances guaranteed are:Outer Diameter (OD): ± 0.015mm
Clear Aperture (CA): ± 0.100mm
Effective Focal Length (EFL): ± 1%
Working Distance (WD): ± 1% of EFL

Lens Code 350022

NA = 0.47

EFL = 4.47 mm

CT = 3.44 mm
Surface 2

ø5.42 ± 0.015
ø4.60

Surface 1

1.88

OPTICAL DESIGN SPECIFICATIONSDesign Wavelength

780 nmNumerical Aperture (NA)

0.47

350660

Clear Aperture (CA)4.20 mm

350610Effective Focal Length (EFL)

4.47 mm

Magnification

Infinite

0.60

4.00

4.80

6.325

350670RMS WFE< Diff. Limit

0.60

0.70

0.84

3.60

370930Outer Diameter (OD)

5.42 mm
1.88 mm

0.62

4.03

5.00

6.325

350340Working Distance (WD)

0.67

2.84

4.00

5.40

350570Design corrected for 1.20 mm thickpolycarbonate disk (index 1.573)

0.68

2.75

3.60

4.00

350390

0.68

3.10

5.00

6.325

350330Design Objective:

Surface 2
R = -10.23541
k = -8.798912
A4 = 3.73586x10-3
A6 = -3.98168x10-4
A8 = -2.0712x10-4
A10 = 5.13961x10-5

Focus light into an optical disk.

Lens Characteristics:

Moderate NA for good light capture; small focused spot.

0.80

0.75

1.20

3.00

370840

Typical Products:

Optical data storage systems.

0.80

0.75

1.20

3.60

370920Order Nomenclature

350022-A AR Coating 400-600nm
350022-C AR Coating 1050-1600nm

7Surface 1
R = 3.154574
k = -0.865451
A4 = 1.15243x10-3
A6 = 8.03738x10-5
A8 = -1.79519x10-5
A10 = 7.22469x10-7

350022-B AR Coating 600-1050nm
350022-D AR Coating 1300-1700nm

Lens Code 350080

NA = 0.55

EFL = 3.89 mm

Lens Code 350110

CT = 3.07 mm

NA = 0.40

EFL = 6.24 mm

CT = 5.36 mm

Surface 1

Surface 2
Surface 2
ø7.20 ± 0.015
ø5.87

ø5.18
ø6.325 ± 0.015

3.45

1.50

Surface 1

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

780 nmNumerical Aperture (NA)

0.55

Clear Aperture (CA)4.29 mm

Effective Focal Length (EFL)

3.89 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

6.325 mm

Working Distance (WD)

1.50 mmSurface 1
R = 2.75
k = -0.613916
A4 = 5.88919x10-4
A6 = -1.76602x10-5
A8 = 1.01025x10-5
A10 = -3.91487x10-6
Surface 2
R = -8.737974
k = -31.05381
A4 = 2.97573x10-3
A6 = -5.0196x10-4
A8 = -1.80723x10-4
A10 = 3.61747x10-5

Design corrected for 1.20 mm thickpolycarbonate disk (index 1.57)

Design Objective:

Focus light into an optical disk.

Lens Characteristics:

High NA for maximum light capture; small focused spot.

Typical Products:

Optical data storage systems.

Order Nomenclature

350080-A AR Coating 400-600nm
350080-C AR Coating 1050-1600nm

Lens Code 350140

NA = 0.55

350080-B AR Coating 600-1050nm
350080-D AR Coating 1300-1700nm

EFL = 1.45 mm

Design Wavelength

780 nmNumerical Aperture (NA)

0.40

Clear Aperture (CA)5.00 mm

Effective Focal Length (EFL)

6.24 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

7.20 mm

Working Distance (WD)

3.45 mm

Laser Window Thickness

0.275 mm

Laser Window Material/Index

BK7/1.517

Surface 2
R = -14.5754
k = -87.228063
A4 = -9.157540x10-4
A6 = 8.64353x10-5

Design Objective:

Collimate or focus laser light at high magnification 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,
hand held and fixed barcode scanners, medical instruments,alignment instruments.

Order Nomenclature

350110-A AR Coating 400-600nm
350110-C AR Coating 1050-1600nm

Lens Code 350150

CT = 1.01 mm

Surface 1
R = 4.3200
k = -0.648067
A4 = 1.65853x10-4
A6 = -8.28138x10-6

NA = 0.50

EFL = 2.00 mm

350110-B AR Coating 600-1050nm
350110-D AR Coating 1300-1700nm

CT = 2.00 mm
Surface 1

Surface 2
Surface 2ø2.40 ± 0.015
ø1.80
ø2.40 ø3.00 ± 0.015

0.88

Surface 1

1.09

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

780 nmNumerical Aperture (NA)

0.55

Clear Aperture (CA)1.60 mm

Effective Focal Length (EFL)

1.45 mmSurface 1
R = 0.9500
k = -0.522546
A6 = 1.25280x10-2
A8 = -3.97188x10-2

Design Wavelength

780 nmNumerical Aperture (NA)

0.50

Clear Aperture (CA)2.00 mm

Effective Focal Length (EFL)

2.00 mm

Magnification

Infinite

Magnification

Infinite

RMS WFE< Diff. Limit

RMS WFE< Diff. Limit

Outer Diameter (OD)

2.40 mm

Outer Diameter (OD)

3.00 mm

Working Distance (WD)

0.88 mm

Working Distance (WD)

1.09 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

BK7/1.517

Surface 2
R = -5.96157
A4 = 1.46106X10-1
A6 = -2.79350x10-1
A8 = 1.99181x10-1

Surface 1
R = 1.500
k = -0.645786
A6 = -1.27177x10-3
A8 = -2.67573x10-3

Surface 2
R = -2.91036
A4 = 9.44102x10-2
A6 = -1.27642x10-1
A8 = 8.16437x10-2

Design Objective:

Collimate or focus laser light.

Design Objective:

Collimate or focus laser light at high magnification from a laser diode.

Lens Characteristics:

High NA for maximum light capture; small physical size.

Lens Characteristics:

High NA for maximum light capture; small physical size.

Typical Products:

Fiber to fiber coupling applications when used with another lensor in pairs.

Typical Products:

Presentation pointers, small weapons sights, survey instruments, alignment
instruments, hand held and fixed barcode scanners, medical instruments.

Order Nomenclature

350140-A AR Coating 400-600nm
350140-C AR Coating 1050-1600nm

350140-B AR Coating 600-1050nm
350140-D AR Coating 1300-1700nm

Order Nomenclature

8350150-A AR Coating 400-600nm
350150-C AR Coating 1050-1600nm

350150-B AR Coating 600-1050nm
350150-D AR Coating 1300-1700nm

Lens Code 350160

NA = 0.55

EFL = 2.72 mm

Lens Code 350170

CT = 1.83 mm

NA = 0.30

EFL = 6.16 mm

CT = 3.48 mm

Surface 2
Surface 2

ø4.10 ø4.70 ± 0.015

ø4.00 ± 0.015 ø3.40

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

780 nmNumerical Aperture (NA)

0.55

Clear Aperture (CA)3.00 mm

Effective Focal Length (EFL)

2.72 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

4.00 mm

Working Distance (WD)

0.97 mm

Design Wavelength
Surface 1
R = 1.93
k = -0.655844
A4 = 2.83298x10-3
A6 = -4.3886x10-5
A8 = 1.52368x10-4
A10 = -1.17709x10-4

Design corrected for 1.20 mm thick polycarbonate disk (index
1.573)

Surface 2
R = -6.74368
k = -31.75381
A4 = 7.35806x10-3
A6 = -2.50767x10-3
A8 = -1.10595x10-3
A10 = 3.87101x10-4

Focus light into an optical disk.

Lens Characteristics:

High NA for maximum light capture; small focused spot.

Typical Products:

Optical data storage system.

Order Nomenclature

350160-A AR Coating 400-600nm
350160-C AR Coating 1050-1600nm

NA = 0.43

0.30

Clear Aperture (CA)3.70 mm

Effective Focal Length (EFL)

6.16 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

4.70 mm

Working Distance (WD)

4.37 mm

Laser Window Thickness

0.275 mm

Laser Window Material/Index

BK7/1.517

Surface 2
R = -19.136

Collimate or focus laser light at high magnification from a laser diode.
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.
350170-A AR Coating 400-600nm
350170-C AR Coating 1050-1600nm

Lens Code 350220

CT = 1.03 mm

Surface 1
R = 4.25
k = -0.863601
A4 = 1.77613x10-4
A6 = -1.55395x10-5

Lens Characteristics:

Order Nomenclature

350160-B AR Coating 600-1050nm
350160-D AR Coating 1300-1700nm

EFL = 1.14 mm

780 nmNumerical Aperture (NA)

Design Objective:
Design Objective:

Lens Code 350200

Surface 1

4.37

0.97

Surface 1

NA = 0.25

350170-B AR Coating 600-1050nm
350170-D AR Coating 1300-1700nm

EFL = 11.00 mm

CT = 5.00 mm

Surface 2
Surface 2

ø6.40

ø1.66

ø7.20 ± 0.015

ø2.40 ± 0.015

Surface 1

1.16

7.96
Surface 1

OPTICAL DESIGN SPECIFICATIONSDesign Wavelength

OPTICAL DESIGN SPECIFICATIONS
1300 nm

Numerical Aperture (NA)

0.12 (image)
0.43 (object)

Clear Aperture (CA)1.30 mm (image)
1.13 (object)

Effective Focal Length (EFL)

1.14 mm

Magnification

3.64

RMS WFE< Diff. Limit

Outer Diameter (OD)

2.40 mm

Working Distance (WD)

1.16/4.93 mm*

Laser Window Thickness

0.300 mm

Laser window Material/Index

BK7/1.517

Design Objective:
Lens Characteristics:
Typical Products:
Order Nomenclature

Surface 1
R = 1.111111
k = -6.995295
A6 = 1.71893x10-1
A8 = 4.09008x10-2
A10 = -8.85435x10-2

Surface 2
R = -1.111111
k = -0.696917
A6 = 8.69628x10-2
A8 = 1.33304x10-2
A10 = 1.53352x10-1*front/back WD

Finite conjugate operates at (3.70:1) magnification.
Single lens couples light to single mode/multi-mode fibers; small physical size for fiberto-fiber coupling.
Laser diode pigtails (SM/MM), laser diode connectors (SM/MM), fiber-to-fiberconnectors (SM/MM).
350200-A AR Coating 400-600nm
350200-C AR Coating 1050-1600nm

350200-B AR Coating 600-1050nm
350200-D AR Coating 1300-1700nm

Design Wavelength

633 nmNumerical Aperture (NA)

0.25

Clear Aperture (CA)5.50 mm

Effective Focal Length (EFL)

11.00 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

7.20 mm

Working Distance (WD)

7.96 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

BK7/1.517

Surface 2
Plano

Design Objective:

Collimate or focus laser light at high magnification from a laser diode.

Lens Characteristics:

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

Typical Products:

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

Order Nomenclature

9

Surface 1
R = 6.627608
k = -0.554366
A4 = 4.39140x10-6
A6 = -3.81456x10-7

350220-A AR Coating 400-600nm
350220-C AR Coating 1050-1600nm

350220-B AR Coating 600-1050nm
350220-D AR Coating 1300-1700nm

Lens Code 350230

NA = 0.55

EFL = 4.51 mm

Lens Code 350240

CT = 2.94 mm

NA = 0.50

EFL = 8.00 mm

CT = 3.69 mm

Surface 2
Surface 2

ø5.31
ø8.68
ø6.325 ± 0.015
ø9.94 ± 0.015
2.91

5.92

Surface 1

Surface 1

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

780 nmNumerical Aperture (NA)

0.55

Clear Aperture (CA)4.95 mm

Effective Focal Length (EFL)

4.51 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

6.325 mm

Working Distance (WD)

2.91 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

BK7/1.517

Surface 1
R = 2.944996
k = -0.481104
A4 = -2.89094x10-5
A6 = -3.76282x10-5
A8 = 3.26442x10-6
A10 = -1.17572x10-6
Surface 2
R = -19.9223
A4 = 4.2371x10-3
A6 = -6.3484x10-4
A8 = 3.46526x10-5

Design Objective:

Collimate or focus laser light at high magnification from a laser diode.

Lens Characteristics:

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

Typical Products:

Presentation pointers, small weapons sights, survey instruments,
hand held and fixed barcode scanners, medical instruments,alignment instruments.

Order Nomenclature

350230-A AR Coating 400-600nm
350230-C AR Coating 1050-1600nm

Lens Code 350260

NA = 0.16

EFL = 15.29 mm

Design Wavelength

780 nmNumerical Aperture (NA)

0.50

Clear Aperture (CA)8.00 mm

Effective Focal Length (EFL)

8.00 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

9.94 mm

Working Distance (WD)

5.92 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

BK7/1.517

Collimate or focus laser light at high magnification from a laser diode.

Lens Characteristics:

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

Typical Products:

Presentation pointers, small weapons sights, survey instruments, alignment
instruments, hand held and fixed barcode scanners, medical instruments.
350240-A AR Coating 400-600nm
350240-C AR Coating 1050-1600nm

Lens Code 350280

CT = 2.20 mm

Surface 2
R = -56.2031
A4 = 5.124x10-4
A6 = -2.26611x10-5
A8 = 3.33115x10-7

Design Objective:

Order Nomenclature

350230-B AR Coating 600-1050nm
350230-D AR Coating 1300-1700nm

Surface 1
R = 5.092394
k = -0.473172
A6 = -2.25726x10-6
A8 = 2.41164x10-9
A10 = -8.2628x10-9

NA = 0.15

350240-B AR Coating 600-1050nm
350240-D AR Coating 1300-1700nm

EFL = 18.40 mm

CT = 2.20 mm

Surface 2
Surface 2
ø5.90

ø5.30

ø6.50 ± 0.015

ø6.50 ± 0.015

17.10
14.00

Surface 1

Surface 1

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

780 nmNumerical Aperture (NA)

0.16

Clear Aperture (CA)5.00 mm

Effective Focal Length (EFL)

15.29 mmSurface 1
R = 9.131140
k = -0.53854
A4 = -7.9241x10-6
A6 = -1.2721x10-7

Design Wavelength

780 nmNumerical Aperture (NA)

0.15

Clear Aperture (CA)5.50 mm

Effective Focal Length (EFL)

18.40 mm

Magnification

Infinite

Magnification

Infinite

RMS WFE< Diff. Limit

RMS WFE< Diff. Limit

Outer Diameter (OD)

6.50 mm

Outer Diameter (OD)

6.50 mm

Working Distance (WD)14.00 mm

Working Distance (WD)

17.10 mm

Laser Window Thickness

0.250 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

BK7/1.517

Laser Window Material/Index

BK7/1.517

Surface 2
Plano

Surface 1
R = 10.9838
k = -0.542929
A4 = -4.4947x10-6
A6 = -4.9161x10-8

Surface 2
Plano

Design Objective:

Collimate or focus laser light at high magnification from a laser diode.

Design Objective:

Collimate or focus laser light at high magnification from a laser diode.

Lens Characteristics:

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

Lens Characteristics:

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

Typical Products:

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

Typical Products:

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

Order Nomenclature

350260-A AR Coating 400-600nm
350260-C AR Coating 1050-1600nm

350260-B AR Coating 600-1050nm
350260-D AR Coating 1300-1700nm

Order Nomenclature

10350280-A AR Coating 400-600nm
350280-C AR Coating 1050-1600nm

350280-B AR Coating 600-1050nm
350280-D AR Coating 1300-1700nm

Lens Code 350330

NA = 0.68

EFL = 3.10 mmLens Code 350340

CT = 3.19 mm

NA = 0.62

EFL = 4.03 mm

CT = 3.07 mm
Surface 2

Surface 2

ø5.32

ø6.325 ± 0.015

ø5.09
ø6.325 ± 0.015

Surface 1

1.76

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

830 nmNumerical Aperture (NA)

0.68

Clear Aperture (CA)5.00 mm

Effective Focal Length (EFL)

3.10 mm

Magnification

Infinite

Outer Diameter (OD)

6.325 mm

Working Distance (WD)

1.76 mmSurface 1
R = 2.75
k = -0.613916
A4 = 5.88919x10-4
A6 = -1.76602x10-5
A8 = 1.01025x10-5
A10 = -3.91487x10-6
Surface 2
R = -3.18854
k = -12.66386
A4 = 1.245834x10-2
A6 = -3.711945x10-3
A8 = 5.122391x10-4
A10 = -3.108578x10-5

Design Objective:

Collimate or focus laser light.

Lens Characteristics:

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

Typical Products:

350330-A AR Coating 400-600nm
350330-C AR Coating 1050-1600nm

Lens Code 350350

NA = 0.42

EFL = 4.50 mm

Design Wavelength

685 nmNumerical Aperture (NA)

0.62

Clear Aperture (CA)5.00 mm

Effective Focal Length (EFL)

4.03 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

6.325 mm

Working Distance (WD)

1.56 mm

Design corrected for 1.20 mm thick K3 glass disk
(index 1.518)

Fiber to fiber coupling applications when used with another lensor in pairs.

Order Nomenclature

1.56

Surface 1

Focus light into an optical disk.

Lens Characteristics:

High NA for maximum light capture, large CA for minimum beam
divergence.

Typical Products:

Optical data storage systems.
350340-A AR Coating 400-600nm
350340-C AR Coating 1050-1600nm

Lens Code 350390

CT = 3.65 mm

Surface 2
R = -10.98799
k = 16.02766
A4 = 9.202479x10-3
A6 = -9.162629x10-4
A8 = 2.800532x10-5
A10 = 6.7433645x10-6

Design Objective:

Order Nomenclature

350330-B AR Coating 600-1050nm
350330-D AR Coating 1300-1700nm

Surface 1
R = 2.774388
k = -0.5333481
A4 = 4.202096x10-4
A6 = -7.493867x10-5
A8 = 2.403049x10-5
A10 = -3.180361x10-6

NA = 0.68

EFL = 2.75 mm

350340-B AR Coating 600-1050nm
350340-D AR Coating 1300-1700nm

CT = 1.90 mm
Surface 2

Surface 2

ø4.70 ± 0.015

ø4.00 ± 0.015

ø4.10

Surface 1

2.38

ø3.80

Surface 1

OPTICAL DESIGN SPECIFICATIONS

1.56

OPTICAL DESIGN SPECIFICATIONSDesign Wavelength

980 nmNumerical Aperture (NA)

0.42

Clear Aperture (CA)3.70 mm

Effective Focal Length (EFL)

4.50 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

4.70 mm

Working Distance (WD)

2.38 mm

Design Objective:

Collimate or focus laser light.

Lens Characteristics:

Moderate NA for good light capture.

Typical Products:

Fiber coupling applications.

Order Nomenclature

350350-A AR Coating 400-600nm
350350-C AR Coating 1050-1600nm

Surface 1
R = 2.8797745
k = -0.6415948
A4 = 3.14802762x10-4
A6 = -2.54647053x10-5
A8 = -2.81435764x10-6
A10 = -3.30733580x10-7

Surface 2
R = -19.13600

350350-B AR Coating 600-1050nm
350350-D AR Coating 1300-1700nm

Design Wavelength

830 nmNumerical Aperture (NA)

0.68

Clear Aperture (CA)3.60 mm

Effective Focal Length (EFL)

2.75 mm

Magnification

Infinite

Outer Diameter (OD)

4.00 mm

Working Distance (WD)

1.56 mmSurface 2
Plano

Design Objective:

Collimate or focus laser light.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Fiber to fiber coupling applications when used with another lensor in pairs.

Order Nomenclature

11

Surface 1
R = 1.638251
k = -0.9158034
A4 = 1.0758341x10-2
A6 = 1.298631x10-3
A8 = -3.797836x10-5

350390-A AR Coating 400-600nm
350390-C AR Coating 1050-1600nm

350390-B AR Coating 600-1050nm
350390-D AR Coating 1300-1700nm

Lens Code 350430

NA = 0.15

EFL = 5.00 mm

Lens Code 350440

CT = 1.01 mm

NA = 0.53

EFL = 2.95 mm

CT = 4.07 mm

Surface 2
Surface 1ø2.00 ± 0.015

Surface 2

ø4.70 ± 0.015

ø4.20

4.36

Surface 1

2.66

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength1550 nm

Numerical Aperture (NA)

0.15

Clear Aperture (CA)1.50 mm

Design Wavelength

980 nmNumerical Aperture (NA)

Surface 1
R = 2.928699
k = -0.58123316

0.27 (image)0.53 (object)

Effective Focal Length (EFL)

5.00 mm

Magnification

Infinite

Clear Aperture (CA)4.20 mm (image)

RMS WFE< Diff. Limit

Effective Focal Length (EFL)

2.95 mm

Outer Diameter (OD)

2.00 mm

Magnification

2.00

Working Distance (WD)

4.36 mm

Outer Diameter (OD)

4.70 mm

Working Distance (WD)2.66/6.91 mm*

Laser Window Thickness

0.250 mm4.00 mm (object)

Surface 2
Plano

Laser Window Material/Index

Surface 2
R = -2.39
k = -0.8190024
A4 = 6.997386x10-3
A6 = 4.925941x10-4
A8 = -1.645947x10-4
A10 = 2.7456578x10-5

BK7/1.517*front/back WD

Design Objective:
Design Objective:

Collimate or focus laser light.

Lens Characteristics:

Low NA for clean circular beam; small physical size.

Typical Products:

Fiber coupling applications.

Order Nomenclature

350430-A AR Coating 400-600nm
350430-C AR Coating 1050-1600nm

Lens Code 350450

NA = 0.30

EFL = 1.16 mm

Finite conjugate operates at (2:1) magnification.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Laser diode pigtails (SM/MM), laser diode connectors (SM/MM), fiber-to-fiberconnectors (SM/MM).

Order Nomenclature

350430-B AR Coating 600-1050nm
350430-D AR Coating 1300-1700nm

350440-A AR Coating 400-600nm
350440-C AR Coating 1050-1600nm

Lens Code 350550

CT = 1.48 mm

Surface 1
R = 2.39
k = -4.511125
A4 = 4.798319x10-3
A6 = -1.140838x10-3
A8 = 3.160119x10-4
A10 = -2.257531x10-5

NA = 0.18

EFL = 6.10 mm

350440-B AR Coating 600-1050nm
350440-D AR Coating 1300-1700nm

CT = 1.93 mm

Surface 2
Surface 2

ø1.80 ± 0.015
ø2.40
ø2.80 ± 0.015

4.88

Surface 1

1.69

Surface 1

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

980 nmNumerical Aperture (NA)

0.30 (image)

Surface 1
R = 1.0000
k = -2.5370781

0.30 (object)
Clear Aperture (CA)Design Wavelength1550 nm

Numerical Aperture (NA)

0.18

Clear Aperture (CA)2.20 mm1.15 mm (image)

Effective Focal Length (EFL)

6.10 mm1.15 mm (object)

Magnification

Infinite

Effective Focal Length (EFL)

1.16 mm

RMS WFE< Diff. Limit

Magnification

1.00

Outer Diameter (OD)

2.80 mm

Outer Diameter (OD)

1.80 mm

Working Distance (WD)

4.88 mm

Working Distance (WD)

1.69/1.69 mm*

Surface 2
R = -1.0000
k = -2.5370781

Surface 1
R = 3.572916
k = -0.5681

Surface 2
Plano*front/back WD

Design Objective:

Minimize alignment sensitivity; finite conjugate operates at (1:1) magnification.

Lens Characteristics:

Single lens couples light to single mode/multi-mode fibers; small physical sizefor fiber-to-fiber coupling.

Design Objective:
Lens Characteristics:

Low NA for clean circular beam; small physical size.

Fiber coupling applications.

Typical Products:

Fiber coupling applications.

Order Nomenclature

350550-A AR Coating 400-600nm
350550-C AR Coating 1050-1600nm

Typical Products:
Order Nomenclature

350450-A AR Coating 400-600nm
350450-C AR Coating 1050-1600nm

350450-B AR Coating 600-1050nm
350450-D AR Coating 1300-1700nm

12Collimate or focus laser light.

350550-B AR Coating 600-1050nm
350550-D AR Coating 1300-1700nm

Lens Code 350560

NA = 0.18

EFL = 13.86 mm

Lens Code 350570

CT = 3.00 mm

NA = 0.67

EFL = 2.84 mm

CT = 2.70 mm

Surface 2
Surface 2

Surface 1

6.325 ± 0.015

ø4.40

ø5.600ø5.40 ± .015
Surface 1
11.99

1.56

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

650 nmNumerical Aperture (NA)

0.18

Clear Aperture (CA)5.10 mmSurface 1
R = 8.339558
k = -0.5864473

Design Wavelength1550 nm

Numerical Aperture (NA)

0.67

Clear Aperture (CA)4.00 mm

Effective Focal Length (EFL)

13.86 mm

Effective Focal Length (EFL)

2.84 mm

Magnification

Infinite

Magnification

Infinite

RMS WFE< Diff. Limit

RMS WFE< Diff. Limit

Outer Diameter (OD)

6.325 mm

Outer Diameter (OD)

5.40 mm

Working Distance (WD)

11.99 mm

Working Distance (WD)

1.56 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

BK7/1.517

Surface 2
Plano

Design Objective:

Collimate or focus laser light.

Lens Characteristics:

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

Typical Products:

Fiber coupling applications, data storage.

Order Nomenclature

350560-A AR Coating 400-600nm
350560-C AR Coating 1050-1600nm

Lens Code 350610

NA = 0.60350560-B AR Coating 600-1050nm
350560-D AR Coating 1300-1700nm

EFL = 4.00 mm

Surface 2
R = -4.319238
k = -32.43041

Design Objective:

Collimate laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Telecommunications.

Order Nomenclature

350570-A AR Coating 400-600nm
350570-C AR Coating 1050-1600nm

Lens Code 350620

CT = 3.04 mm

Surface 1
R = 2.078327
k = -0.9596772
A4 = 5.794628x10-3
A6 = 2.917948x10-5
A8 = -2.350426x10-5
A10 = -2.096937x10-6

NA = 0.59350570-B AR Coating 600-1050nm
350570-D AR Coating 1300-1700nm

EFL = 0.45 mm

CT = 0.30 mm

Surface 2
Surface 1

Surface 1
ø6.325 ± 0.015

ø1.80

Surface 2

ø.55

ø5.41

1.53

0.262

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

410 nmNumerical Aperture (NA)

0.60

Clear Aperture (CA)4.80 mm

Effective Focal Length (EFL)

4.00 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

6.325 mm

Working Distance (WD)

1.53 mmSurface 1
R = 2.774388
k = -0.5333481
A4 = 4.202096x10-4
A6 = -7.493867x10-5
A8 = 2.403049x10-5
A10 = -3.180361x10-6

Surface 2
R = -14.58192
k = -191.5207
A4 = -1.443363x10-3
A6 = 1.4648185x10-3
A8 = -4.7042041x10-4
A10 = 4.8133394x10-5

Design corrected for 1.20 mm thick K3
glass disk (index 1.518)

Design Wavelength1310 nm

Numerical Aperture (NA)

0.59

Clear Aperture (CA)0.52 mm

Effective Focal Length (EFL)

0.45 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

1.80 mm

Working Distance (WD)

0.27 mm

Laser Window Thickness

None

Laser Window Material/Index

None

Surface 1
R = 0.279661
k = -1.713673
A4 = 6.399539
A6 = -11.728248

Surface 2
R = -3.0000

Design Objective:

Focus light through disk onto storage media.

Design Objective:

Collimate or focus laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture, small size.

Lens Characteristics:

High NA for maximum light capture, small size.

Typical Products:

Data storage.

Typical Products:

Telecommunications.

Order Nomenclature

350610-A AR Coating 400-600nm
350610-C AR Coating 1050-1600nm

Order Nomenclature

350620-A AR Coating 400-600nm
350620-C AR Coating 1050-1600nm

350610-B AR Coating 600-1050nm
350610-D AR Coating 1300-1700nm

13350620-B AR Coating 600-1050nm
350620-D AR Coating 1300-1700nm

Lens Code 350660

NA = 0.60

EFL = 2.97 mm

Lens Code 350670

CT = 2.50 mm

Surface 1

NA = 0.60

EFL = 4.00 mm

CT = 2.96 mm

Surface 1

Surface 2ø3.70

Surface 2

ø5.09
ø6.325 ± 0.015

ø4.00 ± 0.015

2.40

1.56

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength1550 nm

Numerical Aperture (NA)

0.60

Clear Aperture (CA)3.60 mm

Effective Focal Length (EFL)

2.97 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

4.00 mm

Working Distance (WD)

1.56 mm

Laser Window Thickness

None

Laser Window Material/Index

None

Surface 1
R = 1.95041
k = -0.8616171
A4 = 6.3289079x10-3
A6 = 2.270895x10-4
A8 = -1.2684027x10-5

Surface 2
R = -8.379831
k = -158.3124

Design Wavelength

405 nmNumerical Aperture (NA)

0.60

Clear Aperture (CA)4.80 mm

Effective Focal Length (EFL)

4.00 mm

Magnification

Infinite

Surface 1
R = 2.708638
k = -0.8968698
A4 = 2.7884019x10-3
A6 = 1.5533767x10-4
A8 = -7.281244x10-6

RMS WFE< Diff. Limit

Outer Diameter (OD)

6.325 mm

Working Distance (WD)

2.40 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

N-PK52 / 1.497

Design Objective:

Collimate or focus laser light at high magnification.

Design Objective:

Collimate laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Telecommunications.

Typical Products:

Data storage.

Order Nomenclature

350660-A AR Coating 400-600nm
350660-C AR Coating 1050-1600nm

Order Nomenclature

350670-A AR Coating 400-600nm
350670-C AR Coating 1050-1600nm

Lens Code 350710

NA = 0.50

350660-B AR Coating 600-1050nm
350660-D AR Coating 1300-1700nm

EFL = 1.49 mm

Lens Code 370060

CT = 0.88 mm

NA = 0.60

EFL = 0.682 mm

Surface 2
R = -19.41511
k = 0.0
A4 = 8.8275461x10-3
A6 = -1.9006168x10-3
A8 = 1.7335967x10-4

350670-B AR Coating 600-1050nm
350670-D AR Coating 1300-1700nm

CT = 0.80 mm
0.621

Surface 1ø2.650 ± 0.015

Surface 1

Surface 2ø2.500ø1.86

Surface 2

ø0.9001.10

CT

OPTICAL DESIGN SPECIFICATIONSWDOPTICAL DESIGN SPECIFICATIONSDesign Wavelength1550 nm

Numerical Aperture (NA)

0.50

Clear Aperture (CA)1.50 mm

Effective Focal Length (EFL)

1.49 mmSurface 1
R = 1.017623
k = -0.695054
A4 = -4.088 E-03
A6 = -2.1192 E-02
A8 = -7.506 E-03
A10 = -5.623 E-03

Design Wavelength1550 nm

Numerical Aperture (NA)

0.60

Clear Aperture (CA)0.84 mm

Effective Focal Length (EFL)

0.682 mm

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

2.50 mm

Working Distance (WD)0.267 mm

0.250 mm

Laser Window Thickness

None

BK7/1.517

Laser Window Material/Index

None

Magnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

2.65 mm

Working Distance (WD)

1.10 mm

Laser Window Thickness
Laser Window Material/Index

Surface 2
R = -4.245282

Design Objective:

Collimate laser light at high magnification.

Design Objective:

Collimate or focus laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture, small size.

Lens Characteristics:

Very high NA for maximum light capture.

Typical Products:

Telecommunications.

Typical Products:

Laser collimator for telecommunications.

Order Nomenclature

350710-A AR Coating 400-600nm
350710-C AR Coating 1050-1600nm

350710-B AR Coating 600-1050nm
350710-D AR Coating 1300-1700nm

Order Nomenclature

14

370060-O AR Coating 600-1050nm
370060-Q AR Coating 1300-1700nm

370060-P

AR Coating 1050-1600nm

Lens Code 370631

NA = 0.55

EFL = 0.750

Lens Code 370840

CT = 0.35

NA = 0.80

EFL = 0.750 mm

CT = 1.13mm

1.800±0.020
0.232
Surface 1
Surface 2ø2.40
ø3.000 +0.005-0.0201.200
ø0.550ø1.328

1.910
WD

0.290
CT

0.03

CT

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONS
1550/1480 nm

Design Wavelength

1550/1480 nm

Numerical Aperture (NA)

0.55

Numerical Aperture (NA)

0.80

Clear Aperture (CA)

0.53

Clear Aperture (CA)

1.2 mmEffective Focal Length (EFL)

0.382

Effective Focal Length (EFL)

0.750 mm

Magnification

4.02

Magnification

Infinite

RMS WFE<Diff. Limit

RMS WFE<Diff. Limit

Outer Diameter (OD)

1.20 mm

Outer Diameter (OD)

3.0 mmWorking Distance (WD)0.290/1.91 mm*

Working Distance (WD)

0.2 mmDistance Holder to Laser

none

Distance Holder to Laser

0.23mmLaser Window Thickness

none

Laser Window Thickness

None

Laser Window Material/Indexnone

Laser Window Material/Index*front/back WD

Lens Holder

Design Wavelength

None
304 Stainless Steel

Design Objective:

Laser to fiber coupling lens.

Design Objective:

Collimate or focus laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture, small size.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Telecommunications.

Typical Products:

Laser collimator for telecommunications.

Order Nomenclature

370631-O AR Coating 600-1050nm
370631-Q AR Coating 1300-1700nm

Lens Code 370880

NA = 0.60

370631-P

EFL = 0.70 mm

Order Nomenclature

AR Coating 1050-1600nm

370840-O AR Coating 600-1050nm
370840-Q AR Coating 1300-1700nm

Lens Code 370890

CT = 0.95 mm

NA = 0.30

370840-P

EFL = 1.80mm

AR Coating 1050-1600nm

CT = 1.28 mm

1.600±0.020

1.000±0.020

0.100
ø1.300ø0.700ø2.500 +0.005-0.0200.782
CTø0.900ø3.00 +0.006-0.020ø1.622

ø1.850

WD
0.038
CT

OPTICAL DESIGN SPECIFICATIONSWDOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

1550/1480 nm

Design Wavelength

1550/1480 nm

Numerical Aperture (NA)

0.60

Numerical Aperture (NA)

0.30

Clear Aperture (CA)0.84 mm

Clear Aperture (CA)1.08 mm

Effective Focal Length (EFL)

0.70 mm

Effective Focal Length (EFL)

1.80 mm

Magnification

Infinite

Magnification

Infinite

RMS WFE< Diff. Limit

RMS WFE< Diff. Limit

Outer Diameter (OD)

2.5 mmOuter Diameter (OD)

3.0 mmWorking Distance (WD)

0.29 mm

Working Distance (WD)

1.1 mmDistance Holder to Laser

0.33mmDistance holder to Laser

1.0mm

Laser Window Thickness

None

Laser Window Thickness

None

None

Laser Window Material/Index

Laser Window Material/Index
Lens Holder

304L Stainless Steel

Lens Holder

None
304 Stainless Steel

Design Objective:

Collimate or focus laser light at high magnification.

Design Objective:

Collimate or focus laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Laser collimator for telecommunications.

Typical Products:

Laser collimator for telecommunications.

Order Nomenclature

370890-O AR Coating 600-1050nm
370890-Q AR Coating 1300-1700nm

Order Nomenclature

370880-O AR Coating 600-1050nm
370880-Q AR Coating 1300-1700nm

370880-P

AR Coating 1050-1600nm

15370890-P

AR Coating 1050-1600nm

Lens Code 370920

NA = 0.80

EFL = 0.750mm

Lens Code 370930

CT = 1.13mm

NA = 0.60

EFL = 0.70 mm

CT = 0.95mm

2.000±0.010
1.050±0.050

2.000±0.100

2.000±0.010

1.050± 0.050

2.000±0.1.00

3.200 +0.050-0.0203.200 +0.050-0.020(ø0.901)(ø1.510)(ø1.328)3.600 +0.000-0.050(ø1.977)CT

3.600 +0.000-0.050

WD

CT

0.03

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

1550/1480nm

Design Wavelength

1550/1480 nm

Numerical Aperture (NA)0.80

Numerical Aperture (NA)

0.60

Clear Aperture (CA)

1.2 mmClear Aperture (CA)0.84 mm

Effective Focal Length (EFL)

0.750 mm

Effective Focal Length (EFL)

0.70 mm

Magnification

Infinite

Magnification

Infinite

RMS WFE< Diff. Limit

RMS WFE< Diff. Limit

Outer Diameter (OD)

4.0 mmOuter Diameter (OD)

4.0 mmWorking Distance (WD)

0.2 mmWorking Distance (WD)

0.29 mm

Distance Holder to Laser

0.23 mm

Distance Holder to Laser

0.33 mm

Laser Window Thickness

None

Laser Window Thickness

None

Laser Window Material/Index

None

Laser Window Material/Index

Lens Holder

Lens Holder

304 Stainless SteelNone
304 Stainless Steel

Design Objective:

Collimate or focus laser light at high magnification.

Design Objective:

Collimate or focus laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Laser collimate for telecommunications.

Typical Products:

Laser collimator for telecommunications.

Order Nomenclature

370920-O AR Coating 600-1050nm
370920-Q AR Coating 1300-1700nm

Order Nomenclature

370930-O AR Coating 600-1050nm
370930-Q AR Coating 1300-1700nm

Lens Code 370940

NA = 0.17370920-P

EFL = 4.0 mm

AR Coating 1050-1600nm

CT = 1.23 mm

1.600±0.020
0.10(ø1.600)(ø1.825)+0.050ø3.000 -0.020
WD
CT

OPTICAL DESIGN SPECIFICATIONSDesign Wavelength

1550/1480 nm

Numerical Aperture (NA)

0.17

Clear Aperture (CA)1.37 mm

Effective Focal Length (EFL)

4.0 mmMagnification

Infinite

RMS WFE< Diff. Limit

Outer Diameter (OD)

3.0 mmWorking Distance (WD)

3.36 mm

Distance Holder to Laser

3.36mmLaser Window Thickness

None

Laser Window Material/Index
Lens Holder

WD
0.04

None
304 Stainless Steel

Design Objective:

Collimate or focus laser light at high magnification.

Lens Characteristics:

High NA for maximum light capture.

Typical Products:

Laser collimator for telecommunications.

Order Nomenclature

370940-O AR Coating 600-1050nm
370940-Q AR Coating 1300-1700nm

370940-P

AR Coating 1050-1600nm

16370930-P

AR Coating 1050-1600nm

Tx Aspheric Glass Lenses™

●

Metro, Access, Hybrid Fiber Coax, and Long Haul●

Precision molded high index glass●

Diffraction limited performance●

Square lenses for ease of mounting●

High volume Wafer-Scale manufacturing

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. US based engineering support and customer service enable custom andderivative product development. LightPath’s simplified approach of molding arrays of glass lenses significantly reduces the production cost over single lenses molding.
All lenses are 100% inspected, tested and AR coated. You can contact your local LightPath sales support directly from the contact list on our website atwww.lightpath.com or call 1-800-GRADIUM.
Lens Code 370061

EFL = 0.682mm

NA = 0.60

CT=0.80mm

Lens Code 370065

NA = 0.12

1.200

0.759

1.500

EFL = 3.477mm

SURFACE 2

CT=0.80mm

SURFACE 2

0.621

R0.050SURFACE 1

Ø1 .000
1.200

1.500

Ø 0.900Ø 0.840

WD
CT

WD
CT

SURFACE 1

OPTICAL DESIGN SPECIFICATIONSOPTICAL DESIGN SPECIFICATIONSDesign Wavelength1550 nm

Numerical Aperture (NA)

0.60

Clear Aperture (CA)0.84 mm

Effective Focal Length (EFL)

0.682 mm

Magnification

Infinite

Surface 1
R = 0.592987
k = -9.625522
A4 = 4.3035069
A6 = -23.837914
A8 = 89.167694
A10 = -142.20566

RMS WFE< Diff. Limit

Substrate Size

1.50 mm squareWorking Distance (WD)0.267 mmLens Code 370200

NA = 0.50

SURFACE 1
BK7, ND=1.517

EFL = 1.140mm

0.250

Design Wavelength1550 nm

Numerical Aperture (NA)

0.12

Clear Aperture (CA)1.00 mm

Effective Focal Length (EFL)

3.477 mm

Magnification

Infinite

Surface 2
Plano

RMS WFE< Diff. Limit

Surface 2
Plano

Substrate Size

1.20 mm

Working Distance (WD)3.043 mm

CT=0.80mm

Lens Code 370635

NA = 0.55

EFL = 0.382mm

0.232

2.000
0.468

Surface 1
R = 3.022602
A6 = -0.014304692

CT=0.35mm

1.200

SURFACE 1

SURFACE 2

SURFACE 2
Ø 0.550
1.600

WD

2.000

1.200

R0.050CT

0.290

OPTICAL DESIGN SPECIFICATIONSDesign Wavelength1310 nm

Numerical Aperture (NA)

0.13 (image)

Clear Aperture (CA)OPTICAL DESIGN SPECIFICATIONS

0.50 (object)

Design Wavelength1310 nm1.60 mm (image)

Numerical Aperture (NA)

0.13 (image)

1.60 mm (object)
Effective Focal Length (EFL)

1.910
CT

Surface 1
Plano

0.55 (object)

1.140 mm

Magnification

3.65

RMS WFE< Diff. Limit

Substrate Size

2.00 mm squareWorking Distance (WD)

1.11 mm

Laser Window Thickness

0.250 mm

Laser Window Material/Index

BK7/1.517

Clear Aperture (CA)0.53 mm (image)
0.40 mm (object)

Surface 2
R = -0.9970379
k = -0.8393407
A4 = - 6.0112993x10-3
A6 = - 5.3099179x10-3
A8 = 1.7759977x10-2
A10= - 1.1901704x10-2

17Effective Focal Length (EFL)

0.382 mm

Magnification

4.0

RMS WFE< Diff. Limit

Substrate Size

1.20 mm squareWorking Distance (WD)0.290 mmSurface 1
Plano
Surface 2
R = -0.3339042
k = -0.6162437
A4 = 0.44159413
A6 = 3.2537548
A8 = -2.7992748
A10 = 85.068875

Mounted Aspheric Lenses●

Easy to handle●

Durable stainless-steel●

Threaded design●

Compact size●

Cost effective

LightPath’s line of mounted aspheric lenses makes assembly work quick andeasy. The housings are made from durable stainless steel, which is suitablefor welding or soldering. The mounts also have a threaded exterior, allowing
you to simply screw the lens into place. Standard design mounts areavailable for twelve of our most popular lens types, but any of the lenses in
the catalog can be mounted into a custom designed holder of yourpreference.

Lens Holder Design MT6

Lens Holder Design MT8

Contact LightPath at 1-800-GRADIUM to discuss yourparticular requirements.

5.85

3.55

M8 X 0 .5 T HREAD

3.20

1.90

ORDERING INFORMATIONPart Number

EFL (mm)NA

Holder TypeD (mm)

350140-X-MT

1.45

0.55

MT6

0.87

350390-X-MT

2.75

0.68

MT8

1.16

350660-X-MT

2.97

0.60

MT8

1.26

350330-X-MT

3.10

0.68

MT9

1.71

350080-X-MT

3.89

0.55

MT9

2.47

350610-X-MT

4.00

0.60

MT9

2.42

350670-X-MT

4.00

0.60

MT9

2.04

350340-X-MT

4.03

0.62

MT9

2.49

350440-X-MT

2.95

0.27/0.53

MT8

2.53

350230-X-MT

4.51

0.55

MT9

2.59

350110-X-MT

6.24

0.40

MT9

3.18

350240-X-MT

8.00

0.50

MT12

5.60

350220-X-MT

11.00

0.25

MT9

7.56

350560-X-MT

13.86

0.18

MT9

11.74

350260-X-MT

15.29

0.16

MT9

13.60

350280-X-MT

18.40

0.15

MT9

16.70

Ø 6.240

Stainless Steel 304

Holder Outer Diameter+/- 0.025mm

Holder Inner Diameter+/- 0.100mm

Holder Length+/- 0.100mm

Length of Threaded Section+/- 0.100mm

Ø 8.240

Ø 3.720

D
M6-0.5 THREAD

Lens Holder Design MT9

Lens Holder Design MT12

GENERAL SPECIFICATIONS AND TOLERANCES
Holder Material

Ø 2.435

18

DCirculight™
CIRCULARIZE MOST COMMERCIALLY AVAILABLE RED, NIR AND BLUE LASERS●

Compatible with many commercially available Laser
Diodes from: Nichia® (405nm),Sanyo®, Sony®,Toshiba®,
OptNext® (Hitachi®) Panasonic® and Mitsubishi®
(visible to near infrared)●

Higher Transmitted Power●No additional collimating optics needed●

Nominal 2.5mm Diameter Beam
(Dependent on Laser Diode)●

Diffraction Limited Performance●

Increase Fiber Coupled Efficiency●

One Lens Alignment

Most commercially available laser diodes project an elliptical beam.This is due to the diode junction having an aspect ratio exceeding 1:1. Many laser applications
today require a circularized beam. LightPath’s CircuLight™ (patent pending) lens technology creates a simple solution to circularize most available laser diodes.
LightPath offers both externally and internally mounted CircuLight™ lens options. The external CircuLight™ optics module mounts outside of the laser diodepackage and consists of two rotationally non-symmetric aspheric cylinders.The first cylinder captures the fast axis of the beam divergence and then collimates it.
The beam from the slow axis expands to the same size as the fast axis and is then collimated by the second aspheric cylinder. CircuLight™ provides a very
elegant and highly efficient (> 90% energy throughput) means to circularize your laser diode without any additional collimating optics or prisms.

Different Methods of Beam Circularization
There are a number of techniques used to circularize laser diodes. Currently the most widely used methods are anamorphic prism pairs, micro-optics and beam
truncation.

Anamorphic Prism Pair
Anamorphic prism pairs are the most frequently used method for achieving good beam quality and circularization of laser diodes. Although this method
achieves approximately 50% energy throughput, it is often difficult to align the prisms, the prisms are expensive, and the exit beam is not collinear withthe laser diode – all of which make packaging difficult. An additional collimating optics is needed as well, adding to the cost and complexity.

Beam Truncation
Beam truncation is the least efficient method, and is accomplished by simply “clipping” the beam with an aperture or lens. It produces a circular beam,
but only 10%-30% of the beam is transmitted.

Micro-Optics
Some micro-optics approaches utilize a small cylinder lens mounted internally, which slows down the diverging fast axis beam.This lens is incorporated
into an existing laser diode unit. This method does not produce a collimated beam and an external collimating lens is still needed. The value-added
benefit of this approach is its compact size, low cost and high-energy throughputs of approximately 75-80%. This integrated approach limits the varietyof laser diode options.
LightPath’s internally mounted CircuLight™ approach enables higher coupling efficiency and a collimated beam.
19

Circulight™ external mounted anamorphic optics
TRANSMITTED POWER COMPARISON TABLE
CircuLight™
Externally mounted CircuLight™ provides a compact, easy to align optic. It requires no additional optics tocollimate the beam and it has exceptional energy throughput that is greater than 90%. Beam size is typically 2.5mm
in diameter (depending on actual laser module). It is an excellent approach for many applications requiring acircular beam.

Because of the large variety of laser diodes, which can be used with CircuLightTM, please contact your local sales
person with the following information: Laser diode manufacturer and the diode model or part number you wish
to use. Custom designs are available covering wavelengths from 385nm to 1.7 microns.

CircuLight™

Prism Pair

MicroOptics

Asphere Lens

Beam Shape

Circular

Circular

Circular

Elliptical

Transmitted Power

> 90%

~ 50%

~ 80%

~ 80%

Lens Code 7100039

EFL = 0.682mm

NA = 0.60

Lens Code 7100040

CT=0.80mm

NA = 0.12

EFL = 3.477mm

CT=0.80mm

8.00

6.00

O6.00

O5.00

B

B

B

OPTICAL DESIGN SPECIFICATIONSBOPTICAL DESIGN SPECIFICATIONSDesign Wavelength

408nm

Design Wavelength

635nm

Clear Aperture

2.8mm

Clear Aperture

2.8mm

Effective Focal Length

fy=2.33mm

Effective Focal Length

fy=2.26mm
fx=7.37mm

fx=5.88mm

20Circulight™ internal mounted anamorphic optics●

Circularizes diode lasers●

Increases laser diode coupling efficiency●

Diffraction limited performance●

One-lens system●

Built-in alignment features

Internally mounted CircuLight™ optics are designed for internal packaging. By positioning the lens very
close to the laser chip itself, these lenses are designed to provide a small circular and collimated beam,providing a very elegant and compact solution. Unlike the externally mounted CircuLight™ lenses which are aligned and assembled in a metal tube, these optics
are made from a single, monolithic piece of glass. An alignment tab is built-in to aid in adjusting the rotational orientation. Custom designs are available covering
wavelengths from 385nm to 1.7 microns.
Lens Code 370900
Design Wavelength
Clear Aperture
Effective Focal Length
Center Thickness

1480nm
1.0mm
EFLx 1.257mm, EFLy 0.564 mm
1.385mm

Molded Glass Micro-Lens Array●

Very high piece-to-piece uniformity●

Focal length tolerance less than 1%●

Pitch tolerance less than one micron●

Numerical apertures up to .65●

Clear apertures up to 1.5mm

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 (finite conjugative) or collimating applications. Pitch tolerances are typically less than one micron and lenses can also be placed with varying pitches across the array.
LENS ARRAY SPECIFICATIONS
Clear Aperture
Pitch
Numerical Aperture
Effective Focal Length
RMS WFE
Configuration

100µm to 1.0mm
Min 25% Larger than CA
Up to 0.6
± 1%
<Diffraction Limit
1 or 2 Dimensional

Guaranteed Minimum<1µm Non-Accumulating
Guaranteed Minimum
Per Design

Information on our moldable glasses
and AR coatings for the Aspheric Lens
Array product can be found in the previous
section on Molded Glass Aspheric lenses

21

GRADIUM® Lenses●

Aspheric performance●

Smaller focused spot size●

Low wavefront distortion●

High power handling●High performance, cost effective

Spherical aberration, chromatic aberration and astigmatism induce sweat on
the brows of optical designers in many diverse application areas.
Avoiding these deviations from “perfect” optical systems is often difficult
without using multiple elements. However, with utilization of LightPath’s uniqueline of GRADIUM® optics, correcting these aberrations using just a single optical element is now 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.
In industry, the lenses have been applied as simple singlets or doublets in complex multi-element systems. In particular, they have been very well received for use
in high-power industrial lasers; many of the world’s largest Nd:YAG laser manufacturers now incorporate GRADIUM® optics in their laser systems.
LightPath’s DuraYAG assemblies provide a drop-in replacement for focusing and collimating assemblies on some of the most popular YAG laser systems. Theirunique coverplate design extends the life of the assembly while the GRADIUM® lens provides a smaller focused spot size, increasing power density at theworkpiece and enhancing overall system performance.
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 Lens

GENERAL LENS SPECIFICATIONSStandard sphericallenses suffer fromspherical aberration,
which artificially limits

Design Wavelength

546nm

Operating Temperature-20˚C to +200˚C

Storage Temperature-40˚C to +300˚C

Outer Diameter (OD) Tolerance+/-0.250mm

Center Thickness (CT) Tolerance+/-0.100mm

Effective Focal Length (EFL) for GAD Series+/- 2%

Effective Focal Length for GPX and GBX Series+/- 1%

Working Distance (WD) for GAD Series+/- 2%

Working Distance for GPX and GBX Series+/-1%

Optical Centration

1 Arc MinuteSurface Quality

40-20 Scratch-Dig

the focused spot size.

Gradium Lens®

GRADIUM’s® unique
refractive index profile
bends rays while
traveling through thelens, resulting in abetter focused, smaller
spot.

Chamfered with Safety Bevel

22

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 correctaberration, 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 processprovides large diameter optical blanks with controlled index and dispersion profiles. Proper gradient profile 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 are 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 benefit of chromatic correction. The dispersion, as well as the optical index, varies in a controlled fashion within the lens. A
finished 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. By combining GRADIUM® flint glass with a homogeneous crown glass, achromatic doublets are fabricated with superior color correction.

The Gradium Process
Stacked Glass Layers(of varying
refractive indexes)

Gradient Index Lens Blank(Combined to form
a continuous varying index)

Refractive index profile ofdiffused gradient lens blank

Typical Spot Diagram
Standard BK7 Plano-Convex Lens

Standard Achromatic Doublet

GRADIUM® Singlet Lens

GRADIUM® Achromatic Doublet

23

Outer
Diameter

Clear
ApertureF/#

GPX-5-5

5mm

4mm

1.0

5mm

2.90mm

3.09mm

GPX-5-12.5

5mm

4mm

2.8

12.5mm

2.00mm11.30mm

GPX-10-10

10mm

9mm

1.1

10mm

3.00mm

8.00mm

GPX-10-18

10mm

9mm

2.0

18mm

2.50mm16.52mm

GPX-10-22

10mm

9mm

2.5

22mm

2.50mm

20.54mm

GPX-10-25

10mm

9mm

2.8

25mm

2.50mm

23.55mm

GPX-10-30

10mm

9mm

3.3

30mm

2.50mm28.53mm

GPX-10-40

10mm

9mm

4.5

40mm

2.00mm

38.84mm

GPX-15-15

15mm

13mm

1.1

15mm

4.20mm12.24mm

GPX-15-40

15mm

13mm

3.0

40mm

2.00mm

38.83mm

GPX-20-50

20mm

18mm

2.8

50mm

3.00mm

48.24mm

GPX-25-60

25mm

22mm

2.6

60mm

6.00mm

56.46mm

GPX-25-80

25mm

22mm

3.5

80mm

4.00mm

77.69mm

GPX-30-60

30mm

27mm

2.2

60mm

6.00mm56.44mm

GPX-30-70

30mm

27mm

2.6

70mm

6.00mm

66.47mm

GPX-30-80

30mm

27mm

3.0

80mm

4.00mm

77.68mm

GPX-30-100

30mm

27mm

3.7

100mm

6.00mm

96.53mm

GPX-40-80

40mm

36mm

2.2

80mm

6.00mm

76.47mm

GPX-40-100

40mm

36mm

2.8

100mm

6.00mm

96.56mm

GPX-40-125

40mm

36mm

3.5

125mm

6.00mm121.52mm

GPX-40-150

40mm

36mm

4.2

150mm

6.00mm146.49mm

GPX-50-100

50mm

45mm

2.2

100mm

8.00mm

94.90mm

GPX-50-125

50mm

45mm

2.8

125mm

8.00mm120.37mm

GPX-50-150

50mm

45mm

3.3

150mm

8.00mm145.25mm

GPX-50-160

50mm

45mm

3.6

160mm

8.00mm155.25mm

GPX-50-200

50mm

45mm

4.5

200mm

8.00mm

195.27mm

GPX-80-125

80mm

72mm

1.7

125mm

12.25mm

116.91mm

Bi-Convex

GBX-25-40

25mm

22mm

1.8

40mm

4.60mm37.51mm

GBX-30-40

30mm

27mm

1.5

40mm

5.76mm36.72mm

GBX-50-80

50mm

45mm

1.8

80mm

8.00mm

75.46mm

Achromat

GAD-5-15

5mm

4mm

3.3

15mm

4.00mm

13.07mm

GAD-10-20

10mm

9mm

2.2

20mm

6.00mm

17.17mm

GAD-25-50

25mm

22mm

2.2

50mm

11.00mm

44.37mm

GMN-30-50

30mm

27mm

1.9

50mm

5.00mm

46.82mm

Plano-Convex

Lens CodeMEGRADIUM® Lenses
Effective
Center Back Focal
Focal Length Thickness
Length24

GRADIUM® Lenses

VC

Dual-Band

Broad-Band

Standard Anti-Reflective Coatings
Wavelength

Reflectivity

Coating Code400 – 700 nm
650 – 1000 nm
1000 – 1600 nm
633 & 1064 nm
532 & 1064 nm
1310 & 1550 nm
530 & 670 nm
808 & 940 nm
1064 nm< 0.5% avg.
< 0.5% avg.
< 0.5% avg.
< 0.25% max.
< 0.25% max.
< 0.25% max.
< 0.25% max.
< 0.25% max.
< 0.25% max.

– BB1
– BB2
– BB3
– DB1
– DB2
– DB3
– DB4
– DB5
– VC8

Reflectivity per surface (%)

Coating Curves
0.6

VC8

BB1

0.5

BB2

0.4

BB3
DB3

0.3

DB5

0.2
0.1
0

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800
Wavelength (nm)GAD Achromatic Lens Performance
0.8
0.6
0.4

Focal Shift (mm)

0.2
0

GAD

-0.2

GPX

-0.4
-0.6
-0.8
-1
-1.2
-1.4
0.48610.53610.58610.6361

Wavelength (microns)

EFL Shift of GPX vs. GAD lenses over wavelength.

Order / Product Nomenclature

Customization

Please use the following format to order the proper Gradium Lens.

LightPath would be happy to design a custom GRADIUM® lens to yourindividual specifications. We can customize the focal length, diameter,and design wavelength to meet your specific needs. Lenses can also be
provided with custom anti-reflective coatings or mounted in custom
housings. Contact LightPath at 1-800-GRADIUM to discuss yourparticular requirements.

GXX – XX - XXX - XX

Coating CodeLens Code
Example: GPX-30-70-BB2 (GPX 30mm diameter, EFL 70mm, BB2 Coating)25

GRADIUM® DuraYAG™ Optics Module●

Smaller spot size provides better quality cuts●

Increases life of laser and optics●

Pre-assembled for quick, easy installation●

Simple One-Lens Design

The High Cost of Contamination
Many of the problems associated with today’s high power laser applications are a result of contamination on
optical surfaces. Contaminants on the lens surface absorb the laser light, heat up, and damage the AR coating
and the lens itself. Cleanliness is one of the most important steps in keeping a system on-line and performing
it’s work consistently.The focusing optic takes the brunt of the abuse in most systems.They are subjected to work piece splatter,
dust, dirt and handling contamination. Most laser heads provide glass coversheets, which protect the lens from splatter, but dolittle to protect the lens from other contaminants.
Even in the best sealed or air filtered laser heads, small particulates find their way onto the top surface of the focusing lens.
Typically these lenses are removed and cleaned on a routine basis. Each time the lens is removed more contaminants find their
When contaminants fall on

way into the head assembly. SEM EDAX analyses of focusing optics shows that the primary contaminants are waste products

an unprotected lens, the heat

(Figure A) of the cutting, welding or drilling operation.

can cause the lens to crack.
With DuraYAG™, the window

Lowering Your Cost of YAG Laser Ownershipacts as a shield for the lens,LightPath’s DuraYAG™ modules provide a barrier from these contaminants.The lens modules are designed to replace the lensprotecting it from breaking.

holder and the two silica lenses found in many laser systems. By utilizing a singlet GRADIUM® lens in conjunction withprotective plano optic, lens lifetime is increased and the cost of operating your laser system is decreased. LightPath’s
DuraYAG™ modules are cleaned and assembled in Class100 clean room conditions.

O2
06-May-03

UCF
Q050601

LPT lens, 1,OA10,FA0,R100,20nA,40%,5.5kV,samp.bias(-50V),e-gun (2kV)

When routine maintenance must be performed, just unscrew the optics module, carefully clean

108

the plano optic, and with a few turns of the assembly you are ready to go. Modules require no

23

28 +
Na+ Si39

K+alignment and are easy to clean (plano optics are much easier to clean than a convex opticalelement).When your module does need replacing, just send it back to LightPath and you will have

10

11

6

GRADIUM® assembly DYTP2770F used on the right provides a higher quality cut reducing dross.

Counts Per Second

GRADIUM® Lenses vs. Competitors

7

Li+ 12

4

14

Fe+
Si2+

56

Al+ 40 +Ca
24
Mg+ 32O2+
20

10

SiO+
56

27

10

a replacement in 24 hours with our 24 Hour Priority Plan.

44

B+16O+

Ca++

52
48

Cr+
72

Ti+ 54

6

Si2O+

63
88
65

10

Si2O2+

2

1

10

0
0

20

40

60

80

100

Mass [Da]Traditional silica doublets have a large
spot size, which produces poor quality
cuts with a large amount of dross. This
must be ground down manually.

GRADIUM lenses provide amuch higher quality cut, requiring
little or no post-cut grinding.
®

26

Figure A
SEM analysis on a failed lens shows traces ofcontamination from the cutting process: Titanium,
Chromium, Vanadium, Iron, Sodium, Lithium, Boron,
Maganese, Copper, Chlorine, and Potassium.

GRADIUM® DuraYAG™ Optics Module
The assemblies below list LightPath’s current off-the-shelf DuraYAG™ optics module. LightPath also has a very strong capability to manufacture custom
DuraYAG™ assemblies to your individual specifications. Please contact sales for more information.
The DYRP3070F is designed to be a drop in
replacement for the focusing lens assembly of the
The DYTP2770F is designed to be a drop in

Precitec YR30 head for use with Rofin-Sinar Nd: YAG

replacement for the focusing lens assembly of thelasersPrecitec YH27 head for use with Trumpf Nd:YAG lasers.

DURAYAG™ DYTP2770F ASSEMBLY
SPECIFICATIONSDURAYAG™ DYRP3070F ASSEMBLY
SPECIFICATIONS

Lens material:

GRADIUM® Glass

Lens material:

GRADIUM® Glass

Lens diameter:

27mm

Lens diameter:

30mm

Lens focal length:

70mm

Lens focal length:

70mm

Design wavelength:1064nmDesign wavelength:1064nmAR coating reflectivity:<0.25% at 1064nm

AR coating reflectivity:<0.25% at 1064nm

Maximum laser power:

4kW (CW)

Maximum laser power:

4kW (CW)

Holder material:

Stainless steel

Holder material:

Stainless steel

VC8 Coating

Anti-reflective Coatings
Reflectivity per surface (%)

All of LightPath’s Nd:YAG lenses and modules are available with high quality
anti-reflective coatings. The VC-8 coating is designed to withstand the highpower, rugged environment of YAG laser manufacturing. Reflectivity is typicallyless than <0.15% per surface and guaranteed to be <0.25% at 1064nm.
GRADIUM® lenses and DuraYAG™ modules have been tested at the
Fraunhofer Institute and are suitable for applications up to 4000 watts CW.
Please contact LightPath if you need coatings for applications which are
greater than 4000 watts CW.

Customization

1
0.8
0.6
0.4
0.2
0
950

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

1000

1050

1100

1150

1200

Wavelength (nm)individual specifications. We can customize the focal length, diameter, anddesign wavelength to meet your specific needs. Lenses can also be provided
with custom anti-reflective coatings or mounted in custom housings.

24-Hour Quick Replacement Priority Plan
LightPath’s 24-Hour Priority Plan provides 24-hour delivery of your DuraYAG™ module to replace an assembly that has failed. LightPath offers Gradium® lenses
and modules off-the-shelf for most common YAG laser systems and heads including Trumpf, Rofin-Sinar, GSI Lumonics, Precitec and others. Customized optics
and modules can also be designed for your specific application.

27

Collimators●

Epoxy-free optical path●

Ultra-low insertion loss●

High power handling●

Low back reflection●

Excellent pointing accuracy●

Compact size

The collimator is a fundamental element in many optical systems. The
performance and reliability of essential components such as the collimator are
integral to designing quality systems that meet today’s market demands. For
example, the more energy the collimator is able to gather from the source
and launch into the fiber end, the stronger the signal strength and the higher the system efficiency.This higher efficiency means time and money saved in fewer
system components and greater design freedom.
While product efficiency is important, the compatibility of the collimator with your manufacturing process is equally important. If the specifications aren’t
compatible with your assembly techniques, or if piece-to-piece uniformity and quality are poor, you may be losing valuable savings.
LightPath’s Large Beam Collimators utilize LightPath’s exclusive GRADIUM® lens technology for collimation. The fiber is fused to a glass ‘pellet’, dramaticallyreducing back-reflection and increasing throughput. Large Beam Collimators are available with beam sizes up to 12.5mm and optimized for 1064nm or 1550nm.
Lightpath’s Large Beam Collimators are capable of handling up to 100 Watts of continuous power, making them ideal for use in fiber delivery of high powerindustrial lasers.
Aspheric Connectorized Collimators utilize our precision molded aspheric lenses to combine diffraction limited performance with the ease of use of standard
FC or SMA connectors. They are available for a range of wavelengths and with beam diameters from 2mm to 3mm.
Small Beam Collimators are produced with our patented laser fusion technology. This process fuses the fiber end directly to the optical center of the lens eliminating epoxy within the optical path.The collimator lens surface is then laser polished to within a millionth of an inch of ideal shape, providing extremely low
insertion loss.This high piece-to-piece quality translates to a more efficient assembly process.

Options and Customization
Should you need something different from our standard product offering, LightPath’s sales and engineering staff will work closely with you to tailor a custom
solution to your specific needs. Some of the more common custom options include:

Fiber Connectors

Fiber TypeTo make your assembly process easier, we
can put an FC connector on the end of thefiber. Connectors for PM fiber are alsoavailable.

LightPath can manufacture collimators with a variety of different fiber types,
including polarization maintaining fiber, multi-mode fiber, or fibers fordifferent wavelengths.

Housing
Custom Wavelengths

We can provide collimators
mounted in stainless steel tubes(suitable for welding), in glass ferrules, or even metallized with gold (suitable
for soldering). Please contact LightPath Technologies at 1-800-GRADIUM todiscuss your specific requirements.

If you are not working at 1310 or 1550, we
can design a customized collimator for you
for any wavelength from 400 to 2000nm.

Please contact LightPath Technologies at 1-800-GRADIUM to discuss your specific requirements.

28

Large Beam Collimators●

Standard beam diameters up to 12.5mm●

Uses high performance GRADIUM® lenses●

Mounted in rugged stainless steel housing●

High power handling

LIGHTPATH’S STANDARD LARGE BEAM COLLIMATORS
Center Wavelength

1550nmFiber Type

Corning SMF28

Fiber Length

2 Meters

Return Loss

< -55dB

Operating Temperature-20ºC to +60ºC

Storage Temperature-40ºC to +85ºC

Pointing Accuracy

1º Maximum

Power Handling

10 Watts CW

Insertion Loss

1.0dB

Housing Material

Stainless Steel 303

2

< 1.3

M

Part
NumberBeam Diameter
1/e2 / Full

Working
Distance

Housing
Diameter

Housing Length

GRADIUM® Lens Used

T5100P0S1-20A

1.0 / 1.5mm

250mm

6.35 mm

14.60 mm

GPX-5-5

T5200P0S1-20A

2.0 / 3.0mm

500mm

6.35 mm23.15 mm

GPX-5-10

T5300P0S1-20A

2.5 / 3.8mm

500mm

6.35 mm22.50 mm

GPX-5-12.5

T5400P0S1-20A

3.6 / 5.5mm

500mm

12.70 mm28.50 mm

GPX-10-18

T5600P0S1-20A

5.0 / 7.6mm

500mm

12.70 mm36.00 mm

GPX-10-25

T5700P0S1-20A

6.0 / 9.1mm

500mm

12.70 mm41.10 mm

GPX-10-30

T5900P0S1-20A

12.5 / 19.0mm

500mm

22.00 mm80.70 mm

GPX-20-60

T5100

T5600

Ø6.350 ±0.1
Ø12.700 ±0.1
11.4±0.2(30.9) REF

32.8 ±0.2(52) REF

T5200
T5700

Ø6.350 ±0.1

Ø12.700 ±0.1

20.0 ±0.2(40) REF

T5300

37.9 ±0.2(57) REF

Ø6.350 ±0.1

T5900
19.3 ±0.2(39) REF

T5400

Ø22.000 ±0.1

Ø12.700 ±0.1

77.5 ±0.2

25.3 ±0.2(97.1) REFERENCE(44.9) REF

29

1064nm Fiber Collimators●

Superior Performance●High Power Handling●

Rugged Stainless Steel Housings●

Utilizes GRADIUM® Lens Technology

LightPath Technologies’ new 1064 Fiber Collimators are ideal for Nd:YAG laser and highpower fiber laser applications.

The Fiber Fusion Advantage
LightPath’s patented fiber fusion technology enables the collimators to be used at very
high power. The fiber is laser fused to a plano-plano silica pellet, resulting in a smoothtransition from fiber to pellet without any glass to air interface to cause unwanted backreflections. This technology alleviates the need to angle polish the fiber, which allows the1064NM LB COLLIMATOR SPECS
Center Wavelength
1064nmsystem to remain coaxial. The light expands as it passes from the fiber through theFiber Type

Corning HI1060

pellet, which results in a much lower power density at the exit of the pellet. The lower

Fiber Length

2 meters2

density keeps the collimator stable in the event that contamination falls upon its surface.
The result is an optical system with superior performance and very low loss.

GRADIUM® Inside
The collimators incorporate LightPath’s proprietary GRADIUM® lens technology,
providing aspheric-like performance in a cost effective package. Beam diameters are

M

< 1.2

Return Loss

< -55dB

Pointing Accuracy

1º maxPower Handling

100W (CW)

Operating Temp.

-20ºC to +60ºC

Storage Temp.

-40ºC to +85ºC

Housing Material

Stainless Steelavailable ranging from 1mm up to 12.7mm for standard products. The collimators arehoused in a stainless steel housing and can be offered with rugged RoundLock™ tubing.

Customization
LightPath also has a strong capability to design and manufacture custom collimators to the specs of your choice. Custom beam diameters, fiber types, connectors,
and wavelengths can be chosen to fit your individual application. Please contact sales for more information.

Beam Diameter*
1/e2 / Full (mm)Working
Distance

Housing
Diameter

Housing
LengthGRADIUM®
Lens Used

T5164P0S2-20A

0.97 / 1.47

Infinite

6.35mm

14.6mm

GPX-5-5-VC8

T5264P0S2-20A

2.07 / 3.15

Infinite

6.35mm23.15mm

GPX-5-10-VC8

T5364P0S2-20A

2.65 / 4.00

Infinite

6.35mm

22.5mm

GPX-5-12.5-VC8

T5464P0S2-20A

3.83 / 5.80

Infinite

12.7mm

28.5mm

GPX-10-18-VC8

T5664P0S2-20A

5.32 / 8.07

Infinite

12.7mm36.0mm

GPX-10-25-VC8

T5764P0S2-20A

6.31 / 9.58

Infinite

12.7mm

41.1mm

GPX-10-30-VC8

T5964P0S2-20A

12.70 / 19.31

Infinite

22.0mm80.70mm

GPX-20-60-VC8Part
NumberBeam diameters given are preliminary values. Please contact LightPath sales for the most up to date information.

30

Connectorized Aspheric Collimators●

Diffraction limited performance●

Rugged stainless steel housing●

Pre-aligned for popular wavelengths●

Connectorized for quick assembly●Threaded exterior for easy mounting●

Epoxy free optical path●Compact size

LightPath’s line of aspheric collimator assemblies combine the outstanding performance of glass molded aspheric lenses with the ease of assembly of a fiberconnector 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 either FC or SMA fiber optic connectors and are individually aligned and tested for the specified wavelengths, andwill offer excellent performance throughout the entire range of their AR coatings.

Standard design assemblies are available for two of our most popular lens types, but any asphere in our catalog can be mounted into a custom assembly of yourchoice. Please contact sales for more information.

1

Design λ

L1 (mm)

L2 (mm)

L3 (mm)Typical Beam Dia.1

Beam Waist Location

350220(FC/SMA)-A

543nm

7.79

21.99

26.05

2.0

250mm

350220(FC/SMA)-B

780nm

7.97

22.17

26.23

2.2

250mm

350220(FC/SMA)-C

1310nm

8.12

22.32

26.38

2.0

250mm

350260(FC/SMA)-A

543nm

13.65

25.04

29.11

3.0

250mm

350260(FC/SMA)-B

780nm

13.91

25.30

29.37

3.0

250mm

350260(FC/SMA)-C

1310nm

14.13

25.52

29.59

2.8

250mm

Calculated at 1/e2 point using single mode fiber.

350220-FC

350220-SMA

350260-FC

31350260-SMA

Small Beam Collimators●

Aspheric lens profile●

Fiber laser fused directly to lens●Superior coupling efficiency●

Small form factor

LIGHTPATH’S STANDARD SMALL BEAM COLLIMATORS
Center Wavelength1310 or 1550nm

Fiber Type

Corning SMF28

Fiber Length

2 Meters

Return Loss

< -55dB

Operating Temperature-20ºC to +60ºC

Storage Temperature-40ºC to +85ºC

Pointing Accuracy

1º Maximum

Power Handling

10 Watts CW

Lens Diameter

1.25mm +0.005 / -0.010mm

2

M

Part
Number< 1.3

CenterWavelength

Insertion
Loss

Working
Distance

Beam Diameter1/e 2 / Full

Lens
Length

T1005Y0S1-20A

1550nm

0.3 dB

10-30mm0.42 / 0.58mm

3.2mm

T1055Y0S1-20A

1310nm

0.3 dB

30-60mm0.40 / 0.56mm

3.2mm

T1527Y0S1-20A

1550nm

0.3 dB

0-15mm0.42 / 0.58mm

3.2mm

T1557Y0S1-20A

1310nm

0.3 dB

10-40mm0.40 / 0.56mm

3.2mm

T3005S0S1-20A

1550nm

0.5 dB

80-120mm

0.58 / 0.81mm

4.4mm

T3055S0S1-20A

1310nm

0.5 dB

100-140mm

0.55 / 0.76mm

4.4mm

T3105S0S1-20A

1550nm

0.5 dB

120-160mm

0.58 / 0.81mm

4.4mm

T3155S0S1-20A

1310nm

0.5 dB

130-170mm

0.56 / 0.78mm

4.4mm

32

Optical Isolators●

Process automation yields superior uniformity●

Flexible optical and physical design●

Design variations without major process or tooling changes●

Isolators can be converted into a variety of finishedproducts through proprietary robotic processes

Optical Isolators provide lasers with immunity from back-reflection, 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.

We offer isolators in the following form factors: Cylindrical, Surface-Mount, and Sub-Mount. 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. We haveextensive capability to design and build custom products where the flexibility of our platform-based processes provides a responsive and competitive advantage.

The primary benefits 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.

The Automated Difference●

Reduced costs through higher yields
and increased throughput●

Improved product uniformity and consistency●

Short development times and flexibility●

Scalable manufacturing capacity

The table below shows typical specifications for single, 1.5, and double stage isolators.

Typical Performance Parameters for
Temperature 0 to 85°
λ (center) ± 20 nm
MediumIsolation (dB)Maximum Insertion
Loss (dB)Single Stage

25

0.3

1.5 State42

0.5

Double Stage

47

0.5

Isolator Type33

Optical Isolators
Typical temperature and wavelength dependence of isolators.
The following graphs show how the isolation changes over various
1.5 Stage Isolator Isolation and Insertion Loss as a Function of
Temperature and Wavelength-Non Latching Garnet

temperatures and wavelengths for single stage, 1.5 stage, and double stage
isolators. As you can see, isolation increases as you add stages to the isolator.

-70.00Additional stages also offer more stability of isolation over wavelength and

0.60

Isolation dB

temperature shifts than isolators with fewer stages.

LightPath can also customize isolators to be optimized at any specific050-50.00-40.000.40-30.00-20.000.30-10.00temperature and wavelength of the customer’s choosing. These custom

0.00

0.20

isolators can be made in mass production very quickly, at prices comparable

020

Single Stage Isolator Isolation as a Function of Temperature andWavelength-Non Latching Garnet

60

1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1

-60.00Isolation dB-50.00-40.00-30.00-20.00-10.004060-50.00-40.00-30.00-20.00-10.0080

0.00

Temperature C

Isolation @ 1528
Isolation @ 1548
Isolation @ 1567

Temp Coeff: 0.045 deg/C
Wavelength Coeff: 0.065 deg/nm
Tuned for Max Iso. @ 1548 and C

0

20

40

60

Insertion dB-70.0020

1.5 Iso @ 1528
1.5 Iso @ 1548
1.5 Iso @ 1567
Insertion Loss80

Double Stage Isolator Isolation and Insertion Loss as a Function of
Temperature and Wavelength-Non Latching Garnet-60.00Isolation dB

40
Temperature C°

to the standard isolators listed here.

0Insertion dB-60.00Dbl Iso @ 1528
Dbl Iso @ 1548
Dbl Iso @ 1567
Insertion Loss

80

Temperature C°

OPTICAL TILT ANGLE 0˚ OR 4˚

Cylindrical Isolators●

Ideal for coaxial laser packages

9010

●

Laminate core

Part #CAOD

CLEAR APERTURE
9010-XXX-Y
(CA)

1.000

INPUT
3.00 INDICATOR
2.00 AND-010
CLOCKING FEATURE OF
POLARIZATION PLANE

Dimensions in mm

OPTICAL TILT ANGLE 0˚ OR 4˚

L

O.D.

INPUT INDICATOR AND
CLOCKING FEATURE OF
POLARIZATION PLANE

CLEAR APERTURE
(CA)

L

34

L

Number of Stages
Single1.5 Double
-015

-020

Wavelength
1310nm 1550nm-A-B

Tx Isolators™
●

Metro, Access, Long Haul and Hybrid Fiber Coax●

High volume Wafer-Scale manufacturing●

High isolation, low insertion loss●

Square form factor for ease of mounting●

One stage, 1.5 stage and two stage isolation

Many of today’s transmitters require optical isolators to eliminate back reflections andfeedback in the laser diode. This feedback and noise creates jitter in the system.
LightPath’s Tx IsolatorsTM 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. The Tx IsolatorsTM 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 field at an elevated temperature.This elevated temperature reduces the coercivity (ability of material to resist a change
in it’s dipole orientation) of the material. Latched garnet requires lower post processing temperatures - if temperatures in your process are higher than 170
degrees centigrade a post process magnetization after assembly is required or else LightPath recommends the use of isolators including a magnet. For further
technical information and pricing please contact your local LightPath sales representative.

9000 series

Dimensions in mm

Part Number

CA

HeightWidth

LengthTypicalIsolation

Insertion
Loss

Number of Stages
single1.5
Double9001-XXX-Y

0.500

0.600

0.600

see chart 2

see chart 1

see chart 1

-010

-015

-020

-A

-B

9002-XXX-Y

0.625

0.730

0.730

see chart 2

see chart 1

see chart 1

-010

-015

-020

-A

-B

9003-XXX-Y

0.780

0.880

0.880

see chart 2

see chart 1

see chart 1

-010

-015

-020

-A

-B

9004-XXX-Y

0.880

0.980

0.980

see chart 2

see chart 1

see chart 1

-010

-015

-020

-A

-B

9005-XXX-Y

1.000

1.100

1.100

see chart 2

see chart 1

see chart 1

-010

-015

-020

-A

-B

Chart 1: Optical Specifications

Chart 2: Optical Specifications

Numberof Stages

Part Number

TypicalIsolation

Maximum
Insertion Loss

Single

25dB

0.3dB

1.5

42dB

Double47dB

Wavelength
1310nm 1550nm

Numberof Stages

Wavelength

Length900X-010-A

Single1310nm0.770mm0.5dB

900X-010-B

Single1550nm0.900mm0.5dB

900X-015-A

1.51310nm1.140mm

900X-015-B

1.51550nm1.400mm

900X-020-A

Double1310nm

1.340mm

900X-020-B

Double1550nm1.600mm35

Surface Mount Isolators●

Small form factor●

Laminate core●

Solder or epoxy attach

L●

INPUT AND WAVELENGTHINDICATOR

Suitable for pick-and-place assembly

9020

Dimensions in mm

Part #

CA

A

L

H

W

Number of Stages
Single 1.5 Double

9021-XXX-Y

0.500

0.325

1.00

1.10

1.80

-010

-015*

N/A

-A

-B

9022-XXX-Y

0.780

0.465

1.80

1.75

2.50

-010

-015

-020

-A

-B

9023-XXX-Y

1.000

0.575

1.80

2.20

3.30

-010

-015

-020

-A

-B

W

Wavelength
1310nm 1550nm
H
A
CLEAR APERTURE (CA)* Available in 1310nm style only

Sub Mount Isolators●

Small form factor●

Laminate core●

Solder or epoxy attach

●

L

6°

Optical axis height determined by sub-mount thickness

9030

W
INPUT AND WAVELENGTHINDICATOR

Dimensions in mm

Part #

CA

A

L

H

W

Number of Stages
Single 1.5 Double

9030-XXX-Y

1.000

1.6

2.00

2.40

3.40

-010

-015

-020

Wavelength
1310nm 1550nm
-A

CA

-B
H
A
.75

Micro Fixture isolators●

Epoxy free core optical path●

Laser welded construction

L

9040

Dimensions in mm

Part #

CA

A

L

H

W

Number of Stages
Single 1.5 Double

9040-XXX-Y

0.900

0.75

3.00

3.50

3.50

N/A

N/A

-020

W

Wavelength
1310nm 1550nm
-A

CA
H

-B

A
OPTICAL TILT 4°

36

INPUT ANDWAVELENGTHINDICATOR

Oasis™ Monolithic Isolator& Aspheric Lens●

Small form factor●

Alignment of one optical component●

Diffraction limited performance●

Typical isolation >40 dB (1.5 stage)

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 configurations. The Micro Fixture Bench configuration offers a stainlesssteel holder, which can be easily mounted and aligned with standard pick and place equipment and then soldered or welded into the package. It contains an.8NA or .6NA collimating lens, perfect for collimating most laser diodes. The isolator offers a choice of single, 1.5 and double stages of isolation dependent on
your requirements. The Surface Mount configuration offers smaller form factors and exceptional value. The standard Surface Mount Oasis™ contains a .55 NA
Finite Conjugate lens that couples a laser directly into a single mode fiber. As with all of our products, LightPath offers extensive support to our customers indesigning and manufacturing custom configurations. These would include a wide selection of aspheric lenses and single, 1.5 and double stage isolation.
Design Wavelength
Numerical Aperture (NA)
Clear Aperture (CA)

1550/1480 nm
0.80
1.2 mmDesign Wavelength
Numerical Aperture (NA)

1550/1480 nm
0.60

Design Wavelength
Numerical Aperture (NA)

1550/1480 nm
0.55

Clear Aperture (CA)0.84 mm

Clear Aperture (CA)0.53

Effective Focal Length (EFL)

0.750 mm

Effective Focal Length (EFL)

0.70 mm

Effective Focal Length (EFL)

0.382

Magnification

Infinite

Magnification

Infinite

Magnification

4.02

RMS WFE<Diff. Limit

RMS WFE<Diff. Limit

RMS WFE<Diff. Limit

Outer Diameter (OD)
Working Distance (WD)Distance Holder to Laser

3.0 mm
0.2 mm
0.23 mm

Outer Diameter (OD)
Working Distance (WD)

2.5 mm0.29 mm

Outer Diameter (OD)
Working Distance (WD)

1.20 mm0.290/1.91 mm

Distance Holder to Laser

0.33 mm1.80 mm

1.00 mm1.12 mm0.30 mm

CLEAR APERTURE 0.50 mm

9060

Dimensions in mm

Part #

Wavelength (nm)

Isolator Type

AH

L

W

H

9060-010

1310

1480

1550

Single

0.9

2.0

2.5

2.9

9060-015

1310

1480

1550

1.5 Stage-P Output

0.9

2.0

2.5

2.9

9060-020

1310

1480

1550

Double Stage-P Output

0.9

2.0

2.5

2.9

37

1.25 mm

Typical Performance Parameters
for Temperature 0 to 85°
λ (center) ± 20 nm
Maximum Insertion
MediumIsolator Type Isolation (dB)
Loss (dB)Single Stage

25

0.3

1.5 State42

0.5

Double Stage

47

0.5

Notes