中国空间科学技术

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自适应光学技术补偿镜面温度及自重变形研究

张志伟,俞信,杨秉新   

  1. 北京空间科技信息研究所!北京100086,北京理工大学!北京100081,北京空间机电研究所!北京100076
  • 发布日期:1999-10-25

Experimental Investigation on Correction of Thermal and Gravitational Distortion of Mirrorswith Adaptive Optics

Zhang Zhiwei (Beijing Institute of Space Science & Technology Information,Beijing 100086) Yu Xin (Beijing Institute of Technology,Beijing 100081) Yang Bingxin (Beijing Institute of Space Mechanics and Electronics,Beijing 100076)$$$$   

  • Published:1999-10-25

摘要： 论述了在星载高分辨率相机上采用自适应光学技术的必要性； 介绍了应用自适应光学技术补偿镜面温度及自重变形的实验原理， 进行了计算机模拟计算， 并与实验结果进行比较。实验用一块平面反射镜作为缩比模型， 应用６１ 单元自适应光学系统对其进行了闭环校正实验， 分析了泽尼克多项式所对应的像差的校正效果。自适应光学系统闭环后波前的ＰＶ值小于λ／４， 均方根ＲＭＳ值小于λ／３０，大大改善波前质量，为自适应光学技术在星载相机上的应用提供了有力的实验基础

关键词: 自适应光学, 自重变形, 热变形

Abstract: The paper presents the necessity of employing adaptive optics on high resolution space mirror.The experimental setup of the correction of mirror thermal and gravitational distortion using adaptive optics is introduced.The experiment result is compared with that of the finite element analysis.A reflective plane mirror is used as a model of the primary mirror of the space camera to simulate its thermal and gravitational distortion.A close loop experiment with the 61 unit adaptive optics system is done,the corrective effect of the aberration of the Zernike polynomial is analyzed,and the biggest distortion (P V) value and RMS value of the wavefront after close loop correction is λ/4 and λ/30 seperately.This experiment greatly support the application of adaptive optics on space camera.