Computation of misalignment and primary mirror astigmatism figure error of two-mirror telescopes

doi:10.1117/1.Jatis.4.1.019002

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	Computation of misalignment and primary mirror astigmatism figure error of two-mirror telescopes
	Gu, Z. Y.; Wang, Y.; Ju, G. H.; Yan, C. X.
	2018
发表期刊	Journal of Astronomical Telescopes Instruments and Systems
ISSN	2329-4124
卷号	4 期号:1 页码:10
摘要	Active optics usually uses the computation models based on numerical methods to correct misalignments and figure errors at present. These methods can hardly lead to any insight into the aberration field dependencies that arise in the presence of the misalignments. An analytical alignment model based on third-order nodal aberration theory is presented for this problem, which can be utilized to compute the primary mirror astigmatic figure error and misalignments for two-mirror telescopes. Alignment simulations are conducted for an R-C telescope based on this analytical alignment model. It is shown that in the absence of wavefront measurement errors, wavefront measurements at only two field points are enough, and the correction process can be completed with only one alignment action. In the presence of wavefront measurement errors, increasing the number of field points for wavefront measurements can enhance the robustness of the alignment model. Monte Carlo simulation shows that, when -2 mm <= linear misalignment <= 2 mm, -0.1 deg <= angular misalignment <= 0.1 deg, and -0.2. <= astigmatism figure error (expressed as fringe Zernike coefficients C-5/C-6, lambda = 632.8 nm) <= 0.2 lambda, the misaligned systems can be corrected to be close to nominal state without wavefront testing error. In addition, the root mean square deviation of RMS wavefront error of all the misaligned samples after being corrected is linearly related to wavefront testing error. (c) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).
关键词	active optics alignment misalignments astigmatic figure error nodal aberration theory two-mirror telescope 5th-order optical aberrations rotational symmetry wave-front systems collimation Engineering Instruments & Instrumentation Optics
DOI	10.1117/1.Jatis.4.1.019002
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60934
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	Gu, Z. Y.,Wang, Y.,Ju, G. H.,et al. Computation of misalignment and primary mirror astigmatism figure error of two-mirror telescopes[J]. Journal of Astronomical Telescopes Instruments and Systems,2018,4(1):10.
APA	Gu, Z. Y.,Wang, Y.,Ju, G. H.,&Yan, C. X..(2018).Computation of misalignment and primary mirror astigmatism figure error of two-mirror telescopes.Journal of Astronomical Telescopes Instruments and Systems,4(1),10.
MLA	Gu, Z. Y.,et al."Computation of misalignment and primary mirror astigmatism figure error of two-mirror telescopes".Journal of Astronomical Telescopes Instruments and Systems 4.1(2018):10.

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