Research on the degradation of lightweight mirror surface accuracy

doi:10.1364/ao.57.007758

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Research on the degradation of lightweight mirror surface accuracy
	Zhou, P. W.; Wang, K. J.; Yan, C. X.; Zhang, X. H.
刊名	Applied Optics
	2018
卷号	57 期号:27 页码:7758-7763
关键词	vibratory stress stainless-steel relief Optics
ISSN号	1559-128X
DOI	10.1364/ao.57.007758
英文摘要	The vibration test is one of many tests that space telescopes endure to ensure that functionality is not impaired by severe launch. Telescopes undergo detailed measurements, including mirror surface accuracy measurements. Due to the design shortcomings, degradation of lightweight mirror surface accuracy may exceed the design error budget at times. In this paper, we demonstrate a method to determine the cause of the degradation. By using inertia relief, the influence functions were obtained, and structural deformation was derived from finite element analysis. Based on the structural deformation, we found that the back frame of the telescope had insufficient torsional and bending stiffness. With the indicated need for higher stiffness, the rigidity of the back frame was improved. In addition, high - and low-temperature cycling was used to reduce residual stresses that cause high-frequency distortion. The new vibration test verified the mechanical safety and optical stability of the improved structure. The surface accuracy measured by an optical interferometer was maintained at 0.015 wave within the design error budget. (C) 2018 Optical Society of America
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/61135]
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	Zhou, P. W.,Wang, K. J.,Yan, C. X.,et al. Research on the degradation of lightweight mirror surface accuracy[J]. Applied Optics,2018,57(27):7758-7763.
APA	Zhou, P. W.,Wang, K. J.,Yan, C. X.,&Zhang, X. H..(2018).Research on the degradation of lightweight mirror surface accuracy.Applied Optics,57(27),7758-7763.
MLA	Zhou, P. W.,et al."Research on the degradation of lightweight mirror surface accuracy".Applied Optics 57.27(2018):7758-7763.