In order to select the devices with high reliability and stability with the potential of aerospace application from the scientific shortwave infrared array detector, the performance test and screening experiment of the shortwave infrared array COMS photoelectric conversion detector equipped with Synchronous Monitoring Atmospheric Corrector were carried out. Firstly, according to the aerospace application requirements, the main performance parameters of shortwave infrared array CMOS devices are simulated and analyzed. Secondly, a set of special image acquisition system of shortwave infrared array CMOS device is designed. Aiming at the performance parameters which can cover the whole spectrum, such as photo response nonuniformity, defect pixels, nonlinearity error and so on, a wide spectrum testing platform based on segmented uniform light source is built. Aiming at the monochromatic performance parameters such as quantum efficiency, a multispectral testing platform based on continuous tunable light source is built. Finally, the performance screening experiments of shortwave infrared array CMOS detectors are carried out by using these test systems, and performance parameters of the tested devices are obtained. The experimental results show that the photo response nonuniformity of the optimized shortwave infrared CMOS detector is 2.79% in 1380 nm band, the number of defect pixels is 4, the maximum non-repeatability of quantum efficiency is 2.18%, and the nonlinearity error is less than 1.16%. The index of the selected device meets the needs of aerospace applications. The research results provide a reference for the screening method and performance evaluation of shortwave infrared array detectors.
In order to meet the application requirements of a space borne polarizing radiometer infrared band, a high-precision on-orbit temperature control scheme for the infrared detector combining active temperature control and passive temperature control is proposed. The infrared detector is installed on the heat sink copper block, and the temperature of heat sink copper block is controlled at -20°C~-30°C through the method of auxiliary cold plate + heat pipe thermal conduction. Combined with the infrared detector built-in three-level thermoelectric cooler, the photosensitive surface temperature of the infrared detector is cooled to below -60°C by a method of constant current driving. In order to ensure the measurement accuracy of infrared radiation polarization, the short-term temperature fluctuation of the photosensitive surface of the infrared detector is required to be less than 0.03°C/s. This article has designed the infrared detector temperature control scheme verification test, and actually measured the stability of infrared detector temperature and dark current. The results of the simulation and tests show that the range of infrared detector heat sink temperature is - 25±5°C, the range of infrared detector photosensitive surface temperature is -65°C ~ -75°C,the rate of short-term temperature change of the infrared detector photo-sensitive surface is better than 0.01°C/s, and the dark current fluctuation is less than 1.3pA. Satisfying the on-orbit high-precision polarization measurement requirements.
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