Active alignment of space astronomical telescopes by matching arbitrary multi-field stellar image features

doi:10.1364/OE.432412

CIOMP OpenIR

	Active alignment of space astronomical telescopes by matching arbitrary multi-field stellar image features
	X. Bai; G. Ju; B. Xu; Y. Gao; C. Zhang; S. Wang; H. Ma and S. Xu
	2021
发表期刊	Optics Express
ISSN	10944087
卷号	29 期号:15 页码:24446-24465
摘要	Space-based optical astronomical telescopes are susceptible to mirror misalignments due to space disturbance in mechanics and temperature. Therefore, it is of great importance to actively align the telescope in orbit to continuously maintain imaging quality. Traditional active alignment methods usually need additional delicate wavefront sensors and complicated operations (such as instrument calibration and pointing adjustment). This paper proposes a novel active alignment approach by matching the geometrical features of several stellar images at arbitrary multiple field positions. Based on nodal aberration theory and Fourier optics, the relationship between stellar image intensity distribution and misalignments of the system can be modeled for an arbitrary field position. On this basis, an objective function is established by matching the geometrical features of the collected multi-field stellar images and modeled multi-field stellar images, and misalignments can then be solved through nonlinear optimization. Detailed simulations and a real experiment are performed to demonstrate the effectiveness and practicality of the proposed approach. This approach eliminates the need for delicate wavefront sensors and pointing adjustment, which greatly facilitates the maintainance of imaging quality. 2021 OSA - The Optical Society. All rights reserved.
DOI	10.1364/OE.432412
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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/181722/65023
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	X. Bai,G. Ju,B. Xu,et al. Active alignment of space astronomical telescopes by matching arbitrary multi-field stellar image features[J]. Optics Express,2021,29(15):24446-24465.
APA	X. Bai.,G. Ju.,B. Xu.,Y. Gao.,C. Zhang.,...&H. Ma and S. Xu.(2021).Active alignment of space astronomical telescopes by matching arbitrary multi-field stellar image features.Optics Express,29(15),24446-24465.
MLA	X. Bai,et al."Active alignment of space astronomical telescopes by matching arbitrary multi-field stellar image features".Optics Express 29.15(2021):24446-24465.

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