In order to resolve high precision image plane scanning problem for cryogenic optical system of space infrared camera, the cryogenic scanning technology based on piezoelectric bimorph actuator has been studied. The radiant characteristic of cryogenic optical system has been analyzed. Based on the motional property, a matched scanner has been designed and fabricated, and the scanning properties have been tested at cryogenic temperature. The results indicate that the piezoelectric bimorph scanner can reach a scanning range of 2.4° and a scanning precision of 80 u,rad, which meet the demand of cryogenic optical system of low-orbit space infrared camera.%为了解决空间红外相机低温光学系统中的高精度像方扫描问题,研究了基于压电双晶片驱动器的低温扫描技术.分析了低温光学系统的辐射特性.根据该驱动器的运动特点,设计了与之相匹配的扫描运动机构,并在低温下测试了其扫描性能.实验结果表明,在120 K低温下,该扫描系统的扫描幅度能够达到1.2.,扫描精度达到80μrad,基本能够满足低轨红外扫描相机的应用要求.
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