Jul. 2017

Article Contents

Chinese Optics> 2017> 10(4): 477-483.

ZHAO Tian-jiao, QIAO Yan-feng, SUN Ning, XIE Jun. Surface deformation of theodolite primary mirror under the support system[J]. Chinese Optics, 2017, 10(4): 477-483. doi: 10.3788/CO.20171004.0477

Citation:

ZHAO Tian-jiao, QIAO Yan-feng, SUN Ning, XIE Jun. Surface deformation of theodolite primary mirror under the support system[J].Chinese Optics, 2017, 10(4): 477-483.doi:10.3788/CO.20171004.0477

ZHAO Tian-jiao, QIAO Yan-feng, SUN Ning, XIE Jun. Surface deformation of theodolite primary mirror under the support system[J]. Chinese Optics, 2017, 10(4): 477-483. doi: 10.3788/CO.20171004.0477

Citation:

ZHAO Tian-jiao, QIAO Yan-feng, SUN Ning, XIE Jun. Surface deformation of theodolite primary mirror under the support system[J].Chinese Optics, 2017, 10(4): 477-483.doi:10.3788/CO.20171004.0477

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Surface deformation of theodolite primary mirror under the support system

doi:10.3788/CO.20171004.0477

ZHAO Tian-jiao^{1, 2,},
QIAO Yan-feng^1,,,
SUN Ning¹,
XIE Jun^{1, 2}

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

National Natural Science Foundation of China51275504

More Information

Corresponding author:QIAO Yan-feng, E-mail:qiaoyf@ciomp.ac.cn
Received Date:20 Feb 2017
Rev Recd Date:03 Apr 2017
Publish Date:01 Aug 2017

Abstract

Abstract

In order to study the effect of support system on surface deformation error of theodolite primary mirror at different working angles under gravity, the 600 mm primary mirror finite element support models in processing state and working state are built using Abaqus software, and the gravity deformation analysis of the primary mirror is also carried out. Then, the related surface deformation tests of the primary mirror at different support systems are carried out using 4D interferometer. As a result, the surface deformation errors RMS of the primary mirror at strip support system and mirror room support system are 16.18 nm and 16.90 nm, respectively. The surface deformation errors of ideal primary mirror in varied elevation angles are analyzed by the finite element method. Combining with the surface deformation error in itself, it is found that the surface deformation error of the primary mirror increases gradually in the process of the optical axis changing from horizontal direction to vertical direction, and the maximum RMS is 19.58 nm. This shows the primary mirror chamber support system has an excellent supporting performance and can satisfy the engineering requirements. It is also verified that the finite element theoretical model of the primary mirror chamber support system is accurate.
- photoelectric theodolite,
- primary mirror,
- support system,
- finite element,
- surface deformation test

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References (15)

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