With the developing of space optical remote sensing from understanding the earth to exploring the universe, the development of optical systems for space optical remote sensors is becoming more and more demanding. In the deep space exploration mission, the target signal is weak relative to the background signal. In order to improve the detection sensitivity of the system, and in order to reduce the influence of background radiation on the observation and to pursue the maximum performance of medium and long wave infrared detection, we need to reduce the temperature of the optical system and detector to a low temperature as much as possible. Therefore, the application of cryogenic optics will become more and more important. We can foresee that cryo-space optics will become an important development trend of optical remote sensing. In the development of cryogenic optical systems, it is a very important task to determine the performance of materials in cryogenic environments. The cryogenic properties of certain materials have been tested and some useful data have been obtained in the world.
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