圆形反射镜无隙支撑方法的应用

沙巍; 张星祥; 陈长征; 许艳军; 任建岳

doi:10.3788/OPE.20101810.2199

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圆形反射镜无隙支撑方法的应用

微纳技术与精密机械 | 更新时间：2020-08-12

- 圆形反射镜无隙支撑方法的应用
- Application of zero clearance support method based on circle mirrors
- 光学精密工程 2010年18卷第10期页码：2199-2205
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院研究生院,北京 100039
- 作者简介：
- 基金信息：
  
  国家863高技术研究发展计划资助项目(No.863-2-5-1-13B)()
- DOI：10.3788/OPE.20101810.2199
  中图分类号： TP73;TH703
- 收稿日期：2009-12-01，
  
  修回日期：2010-02-04，
  
  网络出版日期：2010-10-28，
  
  纸质出版日期：2010-10-20
- 稿件说明：
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沙巍, 张星祥, 陈长征, 许艳军, 任建岳. 圆形反射镜无隙支撑方法的应用[J]. 光学精密工程, 2010,18(10): 2199-2205

SHA Wei, ZHANG Xing-xiang, CHEN Chang-zheng, Xu Yan-jun, Ren Jian-yue. Application of zero clearance support method based on circle mirrors[J]. Editorial Office of Optics and Precision Engineering , 2010,18(10): 2199-2205
沙巍, 张星祥, 陈长征, 许艳军, 任建岳. 圆形反射镜无隙支撑方法的应用[J]. 光学精密工程, 2010,18(10): 2199-2205 DOI： 10.3788/OPE.20101810.2199.

SHA Wei, ZHANG Xing-xiang, CHEN Chang-zheng, Xu Yan-jun, Ren Jian-yue. Application of zero clearance support method based on circle mirrors[J]. Editorial Office of Optics and Precision Engineering , 2010,18(10): 2199-2205 DOI： 10.3788/OPE.20101810.2199.

摘要

针对空间光学遥感器圆形反射镜在安装过程中会由于采用间隙配合胶接方法在温度变化时产生非对称应力从而引起非对称像差(主要表现为像散)

以及使用的胶层为非线性材料使反射镜面形变化不可逆从而降低结构可靠性等问题

提出了基于过盈配合的无隙支撑方法。该方法依据最小势能原理

使用柔性块以过盈配合的方式固定反射镜。采取线性搜索方法分析得到了适当的过盈量(0.03 mm)

利用有限元方法模拟实际工况

得到镜面面形变化情况。对反射镜组件进行温度循环试验

并利用干涉仪对反射镜进行检测。试验显示

温度变化4 ℃时

镜面面形RMS值最大为0.018

符合设计要求(RMS值0.02)

干涉图表明反射镜受力均匀、无像散;在温度循环试验中

反射镜面形变化可逆。这些结果表明

对于圆反射镜

采用无隙支撑方法能够很好地解决温度变化对镜面面形的不利影响。

Abstract

In the secondary mirror mounting procedure of a space-borne remote sensor

the method of clearance fixation with auxiliary adhesive is used to fix the mirror usually

which will cause the asymmetric aberration and influence on the imaging quality when the temperature is changed. Moreover

variation of the surface shape is irreversible due to the adhesive layer come from nonlinear materials. To improve the imaging quality and structure reliability

this paper proposed a zero clearance support method based on the lowest potential energy principle . Via the method of interference fixation with flexible blocks

the astigmatism aroused by non-symmetrical stress was avoided theoretically

and the irreversible problem was solved. The appropriate interference value (0.03 mm) was obtained by the finite element analysis. By using the interference value

both gravity and temperature variation(4 ℃) were considered and the surface shape test was performed using an interferometer. Experiments show that the RMS value of the surface shape is 0.018

which meets the design requirements (RMS value0.02). obtained results demonstrate that the zero clearance support method for the circle mirrors can relieve the adverse effect of the surface shape caused by temperature variation.

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Keywords

references

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