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Defocus Spot Detection of Astronomical Optical System
Hu TZ(胡天柱); Zhang Y(张勇); Cui XQ(崔向群); Li YP(李烨平); Bai H(白华); Pan XS(潘秀山)
2020-03
Source PublicationResearch in Astronomy and Astrophysics
Volume20Issue:3Pages:41-49
Abstract
Defocusing spot size detection is especially essential for aberration analysis and correction of optical systems. In the case of far defocusing, the celestial forms a pupil image on the detector, and the size of the image is linearly changed with the defocusing distance, and can be used to correct the optical system and analyze the image quality. Based on the focal plane attitude detection of Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST), this paper uses a variety of methods to detect the size of the defocusing spot of LAMOST telescope. For the particularity of the spot, the average value spacing algorithm, the peak value spacing algorithm, the ellipse fitting algorithm, and the multi-peak Gaussian
fitting algorithm are used to detect the spot size. This paper will introduce these four methods, in which the average value spacing algorithm is proposed by the author of this paper. The advantages and disadvantages of the four methods are compared. The experimental results show that the average value spacing algorithm can achieve better accuracy of spot size detection in the four algorithms.
KeywordMethods: Data Analysis Techniques: Image Processing Telescopes
Subject Area天文技术与方法
Language英语
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1768
Collection中国科学院南京天文光学技术研究所_期刊论文
望远镜新技术研究室_期刊论文
Affiliation南京天文光学技术研究所
Recommended Citation
GB/T 7714
Hu TZ,Zhang Y,Cui XQ,et al. Defocus Spot Detection of Astronomical Optical System[J]. Research in Astronomy and Astrophysics,2020,20(3):41-49.
APA Hu TZ,Zhang Y,Cui XQ,Li YP,Bai H,&Pan XS.(2020).Defocus Spot Detection of Astronomical Optical System.Research in Astronomy and Astrophysics,20(3),41-49.
MLA Hu TZ,et al."Defocus Spot Detection of Astronomical Optical System".Research in Astronomy and Astrophysics 20.3(2020):41-49.
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