Accurate measurement of deflection of primary and secondary mirrors of large-aperture telescope

doi:10.37188/OPE.20223023.3013

CIOMP OpenIR

	Accurate measurement of deflection of primary and secondary mirrors of large-aperture telescope
	B. Chen; J. Wang and Y. Zhang
	2022
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	30 期号:23 页码:3013-3020
摘要	With continuous increases in the apertures of ground-based telescopesthe size and weight of the lens barrel structure is becoming greater and greaterand the spatial position change of the primary and secondary mirrors caused by the finite rigidity of the structure and the change of the gravity field is becoming increasingly obvious. The accurate measurement and correction of the deflection of the primary and secondary mirrors of a large-aperture telescope is a necessary prerequisite to ensure its imaging quality and pointing accuracy. Based on the structural characteristics of a large-aperture telescopethe factors affecting the position and attitude of the primary and secondary mirrors are analyzedand an optical measurement method based on the internal focusing collimator is proposed. A telescope with a distance of 5. 5 m between the primary and secondary mirrors is measured as an example. The maximum radial offset in the horizontal direction is 196 mthe maximum radial offset in the vertical direction is 16 mthe maximum angular deflection in the horizontal direction is 2. 6and the maximum angular deflection in the vertical direction is 12. 8. Finallythe measurement uncertainty involved in this method is analyzed. The combined standard uncertainty of measuring radial offset is 9 mand the combined standard uncertainty of measuring angular deflection is 0. 65meeting the alignment accuracy of large-aperpure telescopes. 2022 Chinese Academy of Sciences. All rights reserved.
DOI	10.37188/OPE.20223023.3013
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收录类别	ei
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66380
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	B. Chen,J. Wang and Y. Zhang. Accurate measurement of deflection of primary and secondary mirrors of large-aperture telescope[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2022,30(23):3013-3020.
APA	B. Chen,&J. Wang and Y. Zhang.(2022).Accurate measurement of deflection of primary and secondary mirrors of large-aperture telescope.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,30(23),3013-3020.
MLA	B. Chen,et al."Accurate measurement of deflection of primary and secondary mirrors of large-aperture telescope".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 30.23(2022):3013-3020.

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