Suppression of diffraction stray light in the inner-occulted coronagraph

doi:10.1360/N092018-00376

CIOMP OpenIR

	Suppression of diffraction stray light in the inner-occulted coronagraph
	H.Yuan; H.Zhang; M.Sun
	2019
发表期刊	Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica
ISSN	16747259
卷号	49 期号:11 页码:1343-1349
摘要	The coronagraph is a telescope system for the purpose of observing the solar atmosphere. Diffraction light is the strongest source of stray light apart from the solar radiation in this system and need to be suppressed effectively. The propagation of the diffraction light in an inner-occulted coronagraph is simulated by the methods of ray tracing and Gabor transformation. The focus position and the intensity distribution of the diffraction light are obtained. The over-occulting ratio of the Lyot stop is then decided to be 6% based on the simulation results. The level of stray light in the system is measured with a sun simulator in a class 1000 cleanroom before and after the installation of the Lyot stop. Experimental result shows that the diffraction light can be suppressed effectively after the Lyot stop is applied, and the total intensity of the stray light in the final image plane is reduced by about 2 orders of magnitude. The observation capability of the coronagraph will be significantly improved after the diffraction light is eliminated. 2019, Science Press. All right reserved.
关键词	Stray light,Diffraction
DOI	10.1360/N092018-00376
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收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62840
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	H.Yuan,H.Zhang,M.Sun. Suppression of diffraction stray light in the inner-occulted coronagraph[J]. Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica,2019,49(11):1343-1349.
APA	H.Yuan,H.Zhang,&M.Sun.(2019).Suppression of diffraction stray light in the inner-occulted coronagraph.Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica,49(11),1343-1349.
MLA	H.Yuan,et al."Suppression of diffraction stray light in the inner-occulted coronagraph".Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica 49.11(2019):1343-1349.

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