MWIR Thermal Imaging Lens Assemblies

Utilizing in House Fabrication, Coating and Assembly Capabilities
Designed for Each specific Dewar, geometries and cold stops
In-House Expert optical design ensures Stray light control and narcissus minimization
Overview
Lightpath offers custom lens assemblies for the challenging requirements of mid-wave infrared (MWIR) imaging systems. These systems typically have cooled dewars with custom geometries including a cold stop, window, and optional filters that must be taken into consideration for proper optical design and optimal performance. Stray light control and narcissus minimization must also be considered in the optical and mechanical design process, as cooled systems have a higher sensitivity to these effects than uncooled imagers.
Lightpath utilizes state-of-the-art materials and manufacturing techniques to maximize performance while also considering design-for-manufacturability and SWaP constraints. Our expertise in diamond-turning allows us to take advantage of aspheric performance enhancements with the fewest number of lens elements. In addition, our wide selection of materials, including novel chalcogenide glass, enables optimal chromatic, thermal, and mechanical (SWaP) properties to be custom designed to match each application.
Custom MWIR Thermal Imaging Lens Assemblies
LightPath offers custom Mid Wave Thermal Imaging Lens assemblies, designed to specific detectors or customer needs. Please see sample specs for one such lens assembly and Contact us for your custom infrared imaging solutions.
Parameter |
Notes |
Design |
Unit |
---|---|---|---|
Waveband |
MWIR |
3 – 5.5 |
µm |
EFL |
Magnification-based |
24.5 |
mm |
F/# |
Set by Cold Stop |
1.2 |
|
Detector Resolution |
Horizontal x Vertical / Pitch |
1280×1024 / 5µm |
pixels |
Field of View |
Vertical FOV |
12 |
deg |
Horizontal FOV |
15 |
deg | |
Diagonal FOV |
19 |
deg | |
MTF – Min Sag/Tan at 100 lp/mm (3-5.5µm waveband) |
Diffraction Limited MTF (Ref. Only) |
39 |
% |
MTF at On-Axis Field (image center) |
39 |
% | |
MTF at Vertical FOV |
36 |
% | |
MTF at Horizontal FOV |
34 |
% | |
MTF at Diagonal FOV (image corner) |
27 |
% | |
Distortion |
At Corner Field |
-2 |
% |
Relative Illumination |
At HFOV |
91 |
% |
At Corner Field |
81 |
% |
Video Captured with 640 x 512, 5µm pixels, Courtesy of Attollo Engineering
Contact

Mark Palvino