Design of optical-mechanical structure for lunar-based extreme ultraviolet camera

WANG Zhi; LI Zhao-hui

doi:10.3788/OPE.20111910.2427

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Design of optical-mechanical structure for lunar-based extreme ultraviolet camera

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- Design of optical-mechanical structure for lunar-based extreme ultraviolet camera
- Optics and Precision Engineering Vol. 19, Issue 10, Pages: 2427-2433(2011)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111910.2427
  CLC： V476.3
- Received：20 January 2011，
  
  Revised：18 March 2011，
  
  Published Online：27 October 2011，
  
  Published：25 October 2011
- 稿件说明：
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王智, 李朝辉. 月基极紫外相机光机结构设计[J]. 光学精密工程, 2011,19(10): 2427-2433

WANG Zhi, LI Zhao-hui . Design of optical-mechanical structure for lunar-based extreme ultraviolet camera[J]. Editorial Office of Optics and Precision Engineering, 2011,19(10): 2427-2433
王智, 李朝辉. 月基极紫外相机光机结构设计[J]. 光学精密工程, 2011,19(10): 2427-2433 DOI： 10.3788/OPE.20111910.2427.

WANG Zhi, LI Zhao-hui . Design of optical-mechanical structure for lunar-based extreme ultraviolet camera[J]. Editorial Office of Optics and Precision Engineering, 2011,19(10): 2427-2433 DOI： 10.3788/OPE.20111910.2427.

摘要

为了对地球等离子体层产生的30.4 nm辐射进行全方位的长期监视和观测

研制了月基极紫外相机。相机主体采用多层膜单反射镜光学系统以及30.4 nm球面光子探测器的结构形式

跟踪机构采用俯仰-方位模式

由步进电机驱动实现对地球的捕获。针对卫星发射、地月变轨、月表着陆过程中的振动冲击以及月表残酷的温度环境

月基极紫外相机的光机结构设计考虑了环境(力学、温度)适应性

有限元分析结果表明

光机结构在整机质量<15 kg条件下

一阶谐振频率为49.3 Hz;运动机构在-50~+80 ℃运转自如;在50 ℃均匀温降载荷作用下反射镜面形精度RMS值为13.44 nm(<14 nm)

满足相机的技术指标要求。

Abstract

To monitor and research 30.4 nm radiation generated by the plasmasphere

a lunar-based Extreme Ultraviolet(EUV) camera was developed.A multilayer mirror optical system and a 30.4 nm photon counting detector were adopted as the main body of the camera

and a two-dimensional tracing mechanism drived by a stepping motor was used to trace the earth. Aim to the vibration and impact from the process of satellite launching

orbit changes from earth's to moon's

moon landing

and the cruel temperature environment of the moon

the optical-mechanical design of EUV camera gave a consideration to the environmental adaptability. After the optimization by finite element analysis

it shows that the first order resonant frequency of the optical-mechanical structure is 49.3 Hz with the mass less than 15 kg

the motion mechanism operates freely within -50~+80 ℃

and the mirror surface accuracy (RMS) is 13.44 nm(<14 nm) under the load of uniform temperature drop of 50℃. Those results meet the technical requirements of the camera.

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references

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