Design of supporting structure for primary mirror of large aperture theodolite

SAN Xiao-gang1; 2; SUN Ning1; ZHUO Ren-shan1; QIAO Yan-feng1

doi:10.3788/OPE.20132112.3111

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Design of supporting structure for primary mirror of large aperture theodolite

更新时间：2020-08-12

- Design of supporting structure for primary mirror of large aperture theodolite
- Optics and Precision Engineering Vol. 21, Issue 12, Pages: 3111-3117(2013)
- 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. 中国科学院大学，北京 100039,中国
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132112.3111
  CLC： V556;TH743
- Received：22 November 2012，
  
  Revised：11 January 2013，
  
  Published Online：25 December 2013，
  
  Published：25 December 2013
- 稿件说明：
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伞晓刚, 孙宁, 卓仁善, 乔彦峰. 大口径光电经纬仪主反射镜支撑结构设计[J]. 光学精密工程, 2013,21(12): 3111-3117

SAN Xiao-Gang, SUN Ning, ZHUO Ren-Shan, JIAO Pan-Feng. Design of supporting structure for primary mirror of large aperture theodolite[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 3111-3117
伞晓刚, 孙宁, 卓仁善, 乔彦峰. 大口径光电经纬仪主反射镜支撑结构设计[J]. 光学精密工程, 2013,21(12): 3111-3117 DOI： 10.3788/OPE.20132112.3111.

SAN Xiao-Gang, SUN Ning, ZHUO Ren-Shan, JIAO Pan-Feng. Design of supporting structure for primary mirror of large aperture theodolite[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 3111-3117 DOI： 10.3788/OPE.20132112.3111.

摘要

针对大口径光电经纬仪主镜的支撑结构对主镜面形精度的影响，对大口径光电经纬仪的1 000 mm主镜的支撑结构进行了研究。分析了现有轴向和径向支撑结构的局限性，提出了适用于大口径主镜的新的轴向和径向支撑结构，并阐述了该支撑结构的工作原理和优势。利用有限元分析软件建立了主镜的参数化模型，优化了主镜轴向支撑点和径向支撑点的位置，并分析了主镜光轴在竖直和水平位置两个极限状态下的面形误差，计算得到了主镜在竖直状态下面形误差RMS值为2.52 nm；在水平状态下面形误差RMS值为4.33 nm。对主镜进行装调后，用光学干涉仪检测得到主镜光轴水平时面形精度RMS值为19.87 nm。仿真分析结果和实物检测结果都满足设计指标中面形误差RMS值小于/30的要求（=632.8 nm），验证了轴向和径向支撑结构的可行性。

Abstract

In consideration of the effect of support structure for the primary mirror of a large aperture theodolite on the surface figure precision of the primary mirror

the support structure of a 1 000 mm primary mirror was explored. The disadvantages of existing axial and radial supporting structures were analyzed and a new axial and radial complex supporting structure for large aperture primary mirror was presented. Then

the performing principle and the advantages of the supporting structure were discussed. A parameter model of primary mirror was built based on the finite element analysis software

the axial and the radial supporting positions were optimized and the surface figure errors of the optical axis for the mirror in vertical and in level orientations were analyzed. Obtained results show that the surface figure precisions are 2.52 nm and 4.33 nm in RMS values as the mirror's optical axis in vertical and level orientations

respectively. After alignment

the primary mirror is tested in its optical axis is in level orientation by an optical interferometer

and the mirror's RMS value is 19.87 nm in the measurement. The results fully satisfy the precision requirement of RMS value less than /30 (=632.8nm)

which proves the feasibility of the axial and radial supporting structure mentioned above.

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references

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Related Institution

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences

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中国科学院长春光学精密机械与物理研究所

长春理工大学

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

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