LightPath. Infrared Optics. Leaders in aspheric optics and assemblies TECHNOLOGIES
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1 LightPath TECHNOLOGIES Infrared Optics Leaders in aspheric optics and assemblies
2 Infrared Optics from the Experts in Molded Glass Optics Leaders in chalcogenide glass Molding Enhanced thermal performance Reduced SWaP-C with lightweight optics Moldable solution for high volume production of SWIR, MWIR or LWIR lenses Molded aspheric lenses have revolutionized the digital camera market by allowing large volumes of high performance aspheric optics to be produced at a low cost. This technology has been limited to visible and near-infrared wavelengths, due to the crystalline structure of most infrared optical materials. Advances in chalcogenide materials have enabled compression molding for mid- and long-wavelength infrared (MWIR & LWIR) optics in a process similar to visible molded lenses. LightPath s Molded Infrared Optics technology enables the production of high performance, cost-effective infrared aspheric lenses that do not rely on traditional diamond turning or lengthy polishing methods. Utilizing aspheric optics to reduce the number of lenses required for thermal imaging systems is a common practice. Traditional Germanium or Zinc Selenide aspheres are manufactured by diamond turning, which is a time-consuming and expensive process. Diamond turned lenses are made one at a time and the lenses suffer from variations in surface figure resulting in variations of performance from lens to lens. The infrared optics molding process allows lenses to be manufactured in high volume with a highly repeatable, consistent performance. Diffractive features are typically added to infrared aspheres to allow for sophisticated beam shaping or achromatization over a range of wavelengths. With LightPath s molding technologies, these features are molded directly into the surfaces of the lens. LightPath is a pioneer in the development, design and manufacturing of infrared optics made from molded chalcogenide glass. Our high volume production experience brings expertise and knowledge to your project as quantities for infrared optics continue to grow.
3 Lenses Glass Data HIGH PERFORMANCE OPTICS FOR A VARIETY OF APPLICATIONS Chalcogenide glass helps reduce weight in optical systems Smaller focal shifts due to temperature variations Diffractive elements (DOE) for enhanced performance with respect to spectral weighting and temperature variations Better transmission at elevated temperatures than Germanium Molded chalcogenide lenses are a lower cost alternative to Germanium aspheric lenses Refractive Indices and Absorption Coefficient Index λ (µm) Absorption (cm -1 ) Ge 28 Sb 12 Se 60 (BD-2) Uncoated Transmission Curve (5 mm thickness) 100% 80% Transmission% % Transmission 60% 40% 20% 0% (µm) LightPath s infrared moldable glass has several advantages over Germanium, which is traditionally used for aspheric infrared optics. The dn/dt and CTE of the chalcogenide glass results in a smaller change in focal length as a function of temperature. Using molded infrared optics glass enables athermalization to occur using just a single lens or with a minimum of athermalization mechanics. Germanium suffers from transmission loss as temperature increases, especially as the temperature passes 60 C. LightPath s infrared optic aspheric lenses can be used in environments up to 130 C, providing a greater thermal operating range than Germanium. Material Properties Density 4.68 g/cm³ T g 285 C CTE ( C) 14.5 x 10-6 / C dn/dt (5-14 μm) ( C) 70 x 10-6 / C Composition Component Percentage Germanium (Ge) 28% Antimony (Sb) 12% Selenium (Se) 60% Equivalent Glasses LightPath lenses that have a 390xxx prefix use the Ge 28 Sb 12 Se 60 (BD-2) IR glass. Manufacturer Vitron Schott Amorphous Materials Glass IG5 IRG25 AMTIR-3
4 Lenses Glass Data HIGH PERFORMANCE OPTICS FOR A VARIETY OF APPLICATIONS IR-1 Typical Reflectance Curve (spec: 8-12µm) Typical Transmission Curve (spec: 8-12µm) % Transmission % IR-2 Typical Reflectance Curve (spec: 7-14µm) % Refllectance Wavelength (µm) 0 % Transmission % Transmittance % Transmission Wavelength (µm) Typical Transmission Curve (spec: 7-14µm) IR-3 Typical Reflectance Curve (spec: 3-5µm) 4.0 Typical Transmission Curve (spec: 3-5µm) % Refllectance % Transmittance IR-4 Typical Reflectance Curve (spec: 1.8-3µm) 2.5 Typical Transmission Curve (spec: 1.8-3µm) 100 % Refllectance % Transmittance Available Coatings Coating Wavelength R AVG IR < 1.0% per side IR < 3% DLC <1% HEAR IR < 1.0% per side IR <1.0% per side Specs IR1, IR3 and IR4 IR2 Test Abrasion Adhesion Reflectance Description of Test Moderate 50 rub cheesecloth for glasses with Knoop hardness < 450 kg/mm 2 Reference: ISO Severe 200 rubs with eraser. Reference: MIL-C-48497A Adhesive Tape-slow removal. Reference: ISO Reflectance measured over wavelength range measured on axis. Transmission Average 90% 5mm thick witness sample, same glass type. Salt Fog N/A > 48 hours
5 Lenses Lens Assembly Tables LightPath s Infrared Lens Assemblies are specifically designed to be a lower cost replacement for standard diamondturned infrared optical lens assemblies. These infrared lens assemblies integrate LightPath s molded infrared lenses into a complete ready-to-use package. Molded lenses using high-quality chalcogenide glass Designed for a variety of uncooled IR sensors Provides wavelength range of 8 μm - 14 μm Passive athermalization for High-volume, cost effective manufacturing Did you know... If you don t see the lens you need in our catalog, we can custom build it. Our engineering team can manufacture at off-the-shelf lens prices that you won t find elsewhere. Lens Specifications Part Number Focal Length f/# Diagonal Image Size Optimum Detector Sizes Horizontal Field Of View Mount Athermal* Operating Temp Primary Market mm mm 320x µm 42 M20x1.0-6g Material mm mm 320x240-25µm 24 M25x0.5-6g Passive General General Thermal Imaging, Automotive Standard mm mm 320x240-38µm 640x512-17µm M34x0.5-6g Passive General mm mm 80x60-38µm 160x120-25µm 160x120-35µm 120x120-38µm 160x120-38µm 320x240-17µm M12x0.5-6g Material (Firefighting, Security, Handheld Thermographs) mm mm 640x480-17µm 320x240-17µm M24x0.5-6g Material WFOV (Security, Handheld Thermographs) mm mm 640x512-17µm 37 M19x0.5-6g Passive +80 C General mm mm 320x240-17µm 31 M19x0.5-6g Material +50 C mm mm 320x240-25µm 50 M19x0.5-6g Material +50 C mm mm 320x240-25µm 50 M24x0.5g Material +50 C mm mm 80x80-34µm 73 M12x0.5-6g Material +50 C * Material athermalization relies on the natural properties of chalcogenide glass. Lenses with passive athermalization have a compensator that adjusts the position of the lens.
6 Infrared Aspheric Lenses High performance aspheres for laser collimation in the infrared High numerical aperture for maximum collection efficiency Compact, single lens design Diffraction limited performance RoHS Compliant MWIR/LWIR collimating lenses have high numerical apertures. This allows for maximum light collection for MWIR and LWIR lasers, including quantum cascade lasers (QCL). The aspheric design enables a single lens to replace complex, multiple component optical systems and provide high quality infrared beams for sensing and analytical measurements. Infrared collimating lenses can also be molded directly into metal housings, eliminating the need to use epoxy to assemble the lenses. Housing materials such as SS304L, SS316, AL6061, and Inconel 718 are available. Molding into metal housings simplifies the mounting process while providing a hermetic seal between the lens and the rest of the package. Part Number Design Wavelength Numerical Aperture Laser Collimation Lenses Clear Aperture Effective Focal Length Outer Diameter Working Distance Center Thickness µm mm 4.0mm 6.5mm 3.05mm 2.50mm µm mm 19.04mm 12.5mm 16.63mm 5.00mm µm mm 1.50mm 3.5mm 1.24mm 1.10mm µm mm 11.00mm 5.0mm 9.8 mm 3.07mm µm mm 5.95mm 8.0mm 5.0mm 2.50mm mm mm 0.91mm 3.0mm 0.66mm 0.90mm µm mm 3.0mm 6.50mm 2.35mm 2.62mm µm mm 1.47mm 4.5mm 0.63mm 2.18mm µm mm 1.87mm 5.5mm 0.72mm 3.00mm * 9.5µm mm 1.87mm 6.3mm 0.72mm 3.00mm * has the same optical design as the , and is insert molded into a metal ring. Did you know... If you don t see the lens you need in our catalog, we can custom build it. Our engineering team can manufacture at off-the-shelf lens prices that you won t find elsewhere.
7 Infrared Aspheric Lens Assemblies Mounted lens assemblies Mounted Lens Assemblies MT 2 M8x0.5-6c THREAD IRx-MT M6 x g Thread Ø 6.24 Ø 3.55 (4. 70) (. 63) MT MT 0.20 M8 x 0.5-6g Thread M12 x 0.5-6g Thread Ø 5.51 Ø 4.05 Ø 5.11 Ø 6.67 Ø Ø 8.03 Ø MT MT M6.0x0.5-6g-SPL THREAD M9 x g Thread (6.240) (2.600) Ø 9.25 Ø 7.50 Ø 5.50 Ø 7.00 (1.390) (1.660) (3.550) MT M9 x g Thread MT M9x0.5-6g THREAD Ø Ø 7.66 Ø 4.74 Ø M9x0.5-6g (2.75) ) (3.25) ) (6.25) (1.95) Mounted Lens Assemblies General Specifications and Tolerances Holder Material Stainless Steel 304 Holder Outer Diameter mm Holder Inner Diameter mm Holder Length mm Length of Threaded Section mm
8 Infrared Lenses Applications AND CAPABILITIES Infrared systems have grown rapidly in recent years in a broad spectrum of applications including: Thermal imaging and thermography Gas sensing and spectroscopy Security and surveillance Automotive vision enhancement Manufacturing process control and inspection Target tracking and identification These applications demand infrared systems that utilize only the highest quality and most precise optics. LightPath Technologies is taking the same revolutionary technology that made us a global leader in molded glass aspheres and applying it to infrared applications. The unwavering dedication of LightPath s experienced designers and engineers results in high quality and customer satisfaction. LightPath is also pleased to offer you the ability to custom design a lens to any specification that you choose. Our in-house engineering and manufacturing teams provide the unique ability to work with you to design and produce the lenses that you need. Contact us today for a quote on your custom design. Custom Moldable Infrared Lenses Wavelength of Application microns Numerical Aperture or f/# of laser Effective Focal Length Clear Aperture Working Distance mm mm mm Mechanical Restraints Contact LightPath today for your custom quote or LightPath TECHNOLOGIES 2603 Challenger Tech Court Suite 100 Orlando, Florida 32826, USA Phone: rd Building, 1211 Yecheng RD Jiading Industry Park Shanghai, China Phone: Fax: th Building, No. 99 Jing 15 Road Dingmao, Zhenjiang New District Jiangsu, China PB Copyright 2014 LightPath Technologies. All rights reserved.
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