Defocus Spot Detection of Astronomical Optical System | |
Hu TZ(胡天柱)![]() ![]() ![]() ![]() ![]() ![]() | |
2020-03 | |
Source Publication | Research in Astronomy and Astrophysics
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Volume | 20Issue: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. |
Keyword | Methods: Data Analysis Techniques: Image Processing Telescopes |
Subject Area | 天文技术与方法 |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.niaot.ac.cn/handle/114a32/1768 |
Collection | 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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