Study on the Performance Testing of HgCdTe Infrared Detectors in front of the Cryogenic Blackbody

Abstract

In the field of deep space exploration, remote sensors with cryogenic optics for reducing the optics radiation and increasing the remote sensing sensitivity are used for detecting celestial bodies at a long distance. A cryogenic infrared blackbody simulator working in the range of 40-300K which is continuously adjustable in front of the detector was developed, for the performance testing of the background limit detector data collection. The methods of performance parameters measurements for infrared detectors were analyzed in the paper, and the performance detection test of infrared detectors under room temperature and deep low-temperature were introduced. When in front of the cryogenic blackbody, the maximum value of integration time of the infrared detector could be 13 times longer than in front of room temperature blackbody. Meanwhile, the ratidetection rate was 15 times larger. The relationship between the working temperature of optical system and sensitivity of the system could be quantified. The result could be applied for the design of the remote sensing system.