Research on fine co-focus adjustment method for segmented solar telescope

doi:10.1364/OE.522000

	Research on fine co-focus adjustment method for segmented solar telescope
	Wang KY(王昆延)3,4; Dai YC(戴懿纯)2,4; Wang B(王斌)2,4; Tan X(谭旭)3,4; Yang, Dehua 1; Jin ZY(金振宇)2,4
刊名	Optics Express
	2024-04-08
卷号	32 期号:8 页码:14187-14199
DOI	10.1364/OE.522000
产权排序	第1完成单位
文献子类	Journal article (JA)
英文摘要	For segmented telescopes, achieving fine co-focus adjustment is essential for realizing co-phase adjustment and maintenance, which involves adjusting the millimeter-scale piston between segments to fall within the capture range of the co-phase detection system. CGST proposes using a SHWFS for piston detection during the co-focus adjustment stage. However, the residual piston after adjustment exceeds the capture range of the broadband PSF phasing algorithm(± 30µm), and the multi-wavelength PSF algorithm requires even higher precision in co-focus adjustment. To improve the co-focus adjustment accuracy of CGST, a fine co-focus adjustment based on cross-calibration is proposed. This method utilizes a high-precision detector to calibrate and fit the measurements from the SHWFS, thereby reducing the impact of atmospheric turbulence and systematic errors on piston measurement accuracy during co-focus adjustment. Simulation results using CGST demonstrate that the proposed method significantly enhances adjustment accuracy compared to the SHWFS detection method. Additionally, the residual piston after fine co-focus adjustment using this method falls within the capture range of the multi-wavelength PSF algorithm. To verify the feasibility of this method, experiments were conducted on an 800mm ring segmented mirror system, successfully achieving fine co-focus adjustment where the remaining piston of all segments fell within ±15µm. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
学科主题	天文学
URL标识	查看原文
资助项目	N/A
语种	英语
资助机构	N/A
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/27059]
专题	天文技术实验室
作者单位	1.Nanjing Institute of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing, 210042, China 2.Yunnan Key Laboratory of Solar Physics and Space Science, 650216, China; 3.University of Chinese Academy of Sciences, Beijing, 100049, China; 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China;
推荐引用方式 GB/T 7714	Wang KY,Dai YC,Wang B,et al. Research on fine co-focus adjustment method for segmented solar telescope[J]. Optics Express,2024,32(8):14187-14199.
APA	王昆延,戴懿纯,王斌,谭旭,Yang, Dehua,&金振宇.(2024).Research on fine co-focus adjustment method for segmented solar telescope.Optics Express,32(8),14187-14199.
MLA	王昆延,et al."Research on fine co-focus adjustment method for segmented solar telescope".Optics Express 32.8(2024):14187-14199.