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中文摘要：
设计了一种用于检测机载制冷型CCD消旋机构的长波红外光学系统。采用二次成像的方法保证冷光阑效率，应用光学被动消热差原理实现宽温度范围内热差补偿；系统引入以非球面为基底的衍射元件校正像差，探讨了衍射元件面形误差对系统光学性能的影响。设计结果表明，系统结构紧凑，重量轻，在-40～60℃的宽温度范围内实现了光学被动消热差的目的，达到100％的冷光阑效率及抑制冷反射的效果。
英文摘要：
A long-wave infrared optical system to detect the refrigeration type CCD for airborne despun device was designed. The re-imaging configuration was used to meet cold shield efficiency requirement, and optical passive athermalization principle was applied to achieve athermalization compensation with a wide range of temperature. The aberrations are corrected by the aspherical-diffraction element, and the effect of diffraction element shape error on the optical system is discussed. The design results show that this system has compact structure and light weight. It realizes the athermalization compensation in the temperature range of -40 -60℃. 100% cold aperture efficiency and the controlling cold reflection are also achieved.
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