Measurement and calibration of optical axis changes caused by gravity for ground-based large-aperture telescope

doi:10.37188/OPE.20223023.3021

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	Measurement and calibration of optical axis changes caused by gravity for ground-based large-aperture telescope
	H. Wang; J. Wang; T. Chen; Y. Cao and B. Chen
	2022
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	30 期号:23 页码:3021-3030
摘要	As the diameter of ground-based telescopes increases, the structural size of the telescope also increases accordingly, and the effect of the telescopes optical axis pointing caused by gravity becomes increasingly pronounced. The measurement and calibration of optical axis changes for ground-based large-aperture telescopes is a necessary prerequisite to obtaining high-precision orbital target data. To realize the estimation, measurement, and active correction of the telescope pointing error, the optical axis changing rules of the telescope system are analyzed from the structure of the telescope's opt-mechanical system, and an optical axis change measurement and calibration method of the is proposed. The experimental results show that the maximum relative change of the optical axis is 126when the telescope is at low elevation. The main factor causing the pointing change is the effect of gravity on the telescope truss structure. Finally, a calibration model based on the secondary mirror adjustment structure and the coma-free theory of the Cassegrain system is proposed to improve the tracking performance of the 4-meter aperture telescope. The maximum relative change in the optical axis of the telescope after calibration is within 3. According to the test results, the ground-based large telescope pointing change measurement and calibration method can be applied to the calibration and mounting process of the telescope. 2022 Chinese Academy of Sciences. All rights reserved.
DOI	10.37188/OPE.20223023.3021
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66830
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	H. Wang,J. Wang,T. Chen,et al. Measurement and calibration of optical axis changes caused by gravity for ground-based large-aperture telescope[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2022,30(23):3021-3030.
APA	H. Wang,J. Wang,T. Chen,&Y. Cao and B. Chen.(2022).Measurement and calibration of optical axis changes caused by gravity for ground-based large-aperture telescope.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,30(23),3021-3030.
MLA	H. Wang,et al."Measurement and calibration of optical axis changes caused by gravity for ground-based large-aperture telescope".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 30.23(2022):3021-3030.

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