Scanning system is the key system of scanning optical remote sensor. The scanning system pursues high angle measurement accuracy, high control accuracy and high efficiency. The key technologies mainly include scanning mirror and lightweight technology, high precision angle measurement, high precision drive motor, high reliability shafting, low noise angle measurement and control circuit. A new scanning system with high reliability and high precision is presented in this paper. The selection of scanning mirror, shafting, motor and angle sensor, the scheme of scanning control are introduced. A dynamic angle measurement error test and compensation method is introduced, and the influence of space environment on angle measurement accuracy is analyzed. The angle measurement accuracy of space application is better than 1 arc second.
Cryogenic camera which is widely used in deep space detection cools down optical system and support structure by cryogenic refrigeration technology, thereby improving the sensitivity. Discussing the characteristics and design points of infrared detector combined with camera’s characteristics. At the same time, cryogenic background test systems of chip and detector assembly are established. Chip test system is based on variable cryogenic and multilayer Dewar, and assembly test system is based on target and background simulator in the thermal vacuum environment. The core of test is to establish cryogenic background. Non-uniformity, ratio of dead pixels and noise of test result are given finally. The establishment of test system supports for the design and calculation of infrared systems.
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