Athermalization for the supporting structure of space camera primary and secondary mirrors

International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2019-01-24 DOI:10.1117/12.2521897

Shangmin Lin, Hu Wang, Yang Liu, Yaoke Xue, B. Xiang, Jie Liu, Yongjie Xie, Meiying Liu, Liquan Wu

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引用次数: 3

Abstract

In order to meet the requirements of high-precision alignment of primary and secondary mirrors of space camera in thermal environment, we develop a new supporting structure which can eliminate heat affect between mirrors automatically. Through the simulation analysis, we have verified this structural design is feasible. According to requirements of the optical system, an integrated machining scheme with three-bar supporting structure for the secondary mirror is proposed. The automatic athermalization of the primary and secondary mirrors supporting structure is confirmed by structural analysis and optimization. The displacement between the primary mirror and secondary mirrors in the thermal environment range of -20° ~ +60°C is analyzed by using the PATRAN software, and the results show the position change is within 0.01mm. The structural size of the secondary mirror supporting cylinder is optimized, and the effect of stray light suppression for the multilayer sleeve visor is analyzed and verified by using the TRACEPRO software. The results show that the proposed structural design can achieve the high stability of the primary and secondary mirrors supporting structure and the good effect of stray light suppression.

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空间相机主副镜支撑结构的热化

为了满足热环境下空间相机主副镜的高精度对准要求，研制了一种自动消除镜间热影响的新型支撑结构。通过仿真分析，验证了这种结构设计的可行性。根据光学系统的要求，提出了一种采用三杆支撑结构的二次反射镜综合加工方案。通过结构分析和优化，确定了主副镜支撑结构的自动热化。利用PATRAN软件对-20°~ +60°C热环境下主镜和副镜的位移进行了分析，结果表明，主镜和副镜的位置变化在0.01mm以内。优化了副镜支撑筒的结构尺寸，利用TRACEPRO软件对多层套筒遮阳板杂散光抑制效果进行了分析和验证。结果表明，所提出的结构设计能够实现主副镜支撑结构的高稳定性和良好的杂散光抑制效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference

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