Structure design and analysis of the secondary mirror bracket for all day star orientation instrument

Yang Liu; Hu Wang; Shangmin Lin; Yongjie Jie Jie; Jie Liu; Yaoke Xue; Meiying Liu; Feng Wang Sr.

doi:10.1117/12.2519837

24 January 2019 Structure design and analysis of the secondary mirror bracket for all day star orientation instrument

Yang Liu, Hu Wang, Shangmin Lin, Yongjie Jie Jie, Jie Liu, Yaoke Xue, Meiying Liu, Feng Wang Sr.

Proceedings Volume 11052, Third International Conference on Photonics and Optical Engineering; 1105204 (2019) https://doi.org/10.1117/12.2519837
Event: The International Conference on Photonics and Optical Engineering, 2018, Xi'an, China

Abstract

In order to improve the stability of the secondary mirror mounting structure and reduce the influence of the position change of the secondary mirror on the imaging quality of the camera, the secondary mirror support structure was studied. Aiming at the problems of traditional secondary mirror support, a new type of secondary mirror bracket is proposed in this paper. The finite element analysis results show that under the same obstruction ratio, the torsional stiffness, the stiffness along the optical axis and the thermodynamic properties of the new secondary mirror bracket are similar to the secondary mirror traditional support structure, but the weight of the new s bracket is only 15.2% of the traditional support structure. The new bracket solves the shortcomings of the traditional secondary mirror support structure, such as high cost, long period and heavy weight, and is easy to assemble. It has been successfully applied in the all-day star orientation instrument.

Citation Download Citation

Yang Liu, Hu Wang, Shangmin Lin, Yongjie Jie Jie, Jie Liu, Yaoke Xue, Meiying Liu, and Feng Wang Sr. "Structure design and analysis of the secondary mirror bracket for all day star orientation instrument", Proc. SPIE 11052, Third International Conference on Photonics and Optical Engineering, 1105204 (24 January 2019); https://doi.org/10.1117/12.2519837

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