Ritchey-Common sparse-aperture testing of the Giant Steerable Science Mirror

doi:10.1364/ao.57.007764

CIOMP OpenIR

	Ritchey-Common sparse-aperture testing of the Giant Steerable Science Mirror
	An, Q. C.; Zhang, J. X.; Yang, F.; Zhao, H. C.; Cao, H. F.
	2018
发表期刊	Applied Optics
ISSN	1559-128X
卷号	57 期号:27 页码:7764-7769
摘要	The Giant Steerable Science Mirror (GSSM) is the tertiary mirror of the future large telescope, the Thirty Meter Telescope. However, the mirror is too large to be tested using only one aperture, and using many apertures will increase the cost of testing. To accomplish testing at a low cost, the number of apertures should be reduced. The Ritchey-Common (R-C) testing method, commonly used for testing large flat surfaces, uses only a reference spherical mirror and avoids the use of large planar interferometers. Additionally, only the low-spatial-frequency mirror figure is relevant in the system assembly and alignment. Hence, the applicability of sparse-aperture testing is investigated in this paper. Sparse-aperture testing and the R-C method were combined to lower the cost. Using this method and the normalized point source sensitivity (PSSn), the mirror figure can be specified in a simple and accurate manner. Moreover, as fewer subapertures are under test, the efficiency can be improved. An error analysis is conducted, focusing on the shifting error, irregularity error, tipping error, tangential/sagittal error, and seeing. For the testing of the GSSM prototype, the error analysis showed the total error in PSSn is 0.9701. (C) 2018 Optical Society of America
关键词	point-source sensitivity large telescopes stitching test error calibration Optics
DOI	10.1364/ao.57.007764
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60791
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	An, Q. C.,Zhang, J. X.,Yang, F.,et al. Ritchey-Common sparse-aperture testing of the Giant Steerable Science Mirror[J]. Applied Optics,2018,57(27):7764-7769.
APA	An, Q. C.,Zhang, J. X.,Yang, F.,Zhao, H. C.,&Cao, H. F..(2018).Ritchey-Common sparse-aperture testing of the Giant Steerable Science Mirror.Applied Optics,57(27),7764-7769.
MLA	An, Q. C.,et al."Ritchey-Common sparse-aperture testing of the Giant Steerable Science Mirror".Applied Optics 57.27(2018):7764-7769.

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