Surface figure compensation of the primary mirror in a Ritchey–Chrétien space telescope by spring preloads

doi:10.1364/ao.477606

CIOMP OpenIR

	Surface figure compensation of the primary mirror in a Ritchey–Chrétien space telescope by spring preloads
	S. Q. Jia; W. Huang; M. F. Xu and X. Qin
	2023
发表期刊	Applied Optics
ISSN	1559-128X
卷号	62 期号:3 页码:635-643
摘要	To reduce the surface figure error induced by mechanical strains during the integration process of a high-precision mirror, a cost-efficient compensation method by spring preloads is proposed. The study is based on the primary mirror of a Ritchey-Chretien space telescope with a focal length of 1200 mm. First, the surface figure degradation of the mirror during the assembly process is expressed and analyzed. Then, a finite element model of the mirror and its mounting structure is established, and surface deformations caused by different preloading forces are simulated. An optimized combination of different preloads was obtained through data fitting, and the influence of the com-bined preload on the mirror was analyzed. The simulation results show that ring preloads mainly affect spherical aberration and high-order spherical aberrations, while quadrupole preloads mainly affect astigmatism, and the optimized preload can compensate for the surface figure error from 0.1201 RMS to 0.0881 RMS. Last, the surface figure error of the mirror is measured by experiments under optimized preloads, and the result is 0.0841 RMS, which verifies the correctness of the analysis process and effectiveness of the compensation method. (c) 2023 Optica Publishing Group
DOI	10.1364/ao.477606
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收录类别	sci ; ei
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67550
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	S. Q. Jia,W. Huang,M. F. Xu and X. Qin. Surface figure compensation of the primary mirror in a Ritchey–Chrétien space telescope by spring preloads[J]. Applied Optics,2023,62(3):635-643.
APA	S. Q. Jia,W. Huang,&M. F. Xu and X. Qin.(2023).Surface figure compensation of the primary mirror in a Ritchey–Chrétien space telescope by spring preloads.Applied Optics,62(3),635-643.
MLA	S. Q. Jia,et al."Surface figure compensation of the primary mirror in a Ritchey–Chrétien space telescope by spring preloads".Applied Optics 62.3(2023):635-643.

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