Requirements placed on surveillance infrared sensors have steadily increased and technology developments to meet these requirements are continuing. These advancements in sensor technology place ever increasing demands on the test and calibration equipment utilized to verify performance and provide preflight calibration. The test chamber collimator optical system described herein meets these stringent requirements.
"Optical System Design Of The Cryogenic Surveillance Sensor Test Chamber", Proc. SPIE 0890, Infrared Systems and Components II, (3 May 1988); doi: 10.1117/12.944270; https://doi.org/10.1117/12.944270