Many programs need to simulate a point source on the ground to test imaging spatial parameters (i.e. focus, point response function, distortion, field of view, etc.). SDL has built numerous cryogenic multi-function and single function collimators to test these imaging parameters.


  • Multi-function collimators enable in-situ optical testing of many configurations on a single thermal cycle
Parameter MIC1 MIC2 MIC3
External Dimensions 109" x 40" 118" x 53"
Focal Length ~100" 198.5” 279.9”
Exit Beam Diameter 6" 11” x 21”(ellipse) 19"
Pointing Mirror Range 5° x 5° ~5° x 5° ~5° x 5°
Background 10 K, 77 K 10 K, 77 K Ambient



Spatial Infrared Imaging Telescope

SPIRIT III was the infrared sensor aboard MDA’s Midcourse Space Experiment (MSX). This long-wave infrared instrumentation package consisted of a high spatial resolution radiometer, a high spectral resolution interferometer-spectrometer, and an extremely high-off-axis-rejection telescope.


Cryogenic Infrared Radiance Instrumentation for Shuttle

CIRRIS-1A’s goal was to obtain simultaneous spectral and spatial measurements of atmospheric emissions, including airglow and auroral phenomenology.


Commercially Hosted Infrared Program

CHIRP was a flight demonstration program to provide risk reduction for the United States Air Force (USAF) Third Generation Infrared Surveillance (3GIRS) system.


Wide-field Infrared Survey Explorer

The WISE cryogenically-cooled infrared telescope provided a complete stellar infrared map more than 1,000 times more detailed than previous surveys.