Solar coronagraph imager based on internal occulting in Lyman-alpha and visible bands

doi:10.3788/OPE.20202802.0303

CIOMP OpenIR

	Solar coronagraph imager based on internal occulting in Lyman-alpha and visible bands
	Y.-Q. Wang,G. Zhang,L.-P. He,Q.-F. Guo,H.-J. Zhang,H.-F. Wang,X.-D. Wang and B. Chen
	2020
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	28 期号:2 页码:303-314
摘要	The sun is the main source of Earth's energy. As such solar activity and changes have a great influence on the Earth. To meet the solar observation and research needs of astronomers, a new type of Lyman alpha and visible dual-band internal occulting coronagraph was designed to meet the needs of high-resolution imaging observation of the corona at 121.6 nm and 700 nm for space. Firstly, the parameters of the instrument were determined according to the radiation characteristics of the solar disc and corona in the 121.6 nm and 700 nm bands and the initial structure of the coronagraph was given. The initial structure was optimized by an evaluation function. The imaging performance of the coronagraph optics was calculated and the influence of various optical elements on stray light was analyzed. The main optical components and mechanical structure affecting stray light were determined and the position and surface treatment method of a Lyot stop were designed. The coating film structure of the optical components and optical chromoscope of the coronagraph were designed to achieve simultaneous imaging in the 121.6 nm and 700 nm bands. The design and analysis results show that the field of view (FOV) of the coronagraph covers a 1.1 (Rs=0.267 degrees) to 2.5 solar radius, the effective focal length of the system is 945 mm, the spot radius root mean square (RMS) of the entire field of view is less than 10 um, and the angular resolution is better than 4.8 arcsec. The stray light suppression level of the system is better than 10-6 at 1.1 Rs and 10-8 at 2.5 Rs. 2020, Science Press. All right reserved.
DOI	10.3788/OPE.20202802.0303
URL	查看原文
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/181722/64895
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	Y.-Q. Wang,G. Zhang,L.-P. He,Q.-F. Guo,H.-J. Zhang,H.-F. Wang,X.-D. Wang and B. Chen. Solar coronagraph imager based on internal occulting in Lyman-alpha and visible bands[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2020,28(2):303-314.
APA	Y.-Q. Wang,G. Zhang,L.-P. He,Q.-F. Guo,H.-J. Zhang,H.-F. Wang,X.-D. Wang and B. Chen.(2020).Solar coronagraph imager based on internal occulting in Lyman-alpha and visible bands.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,28(2),303-314.
MLA	Y.-Q. Wang,G. Zhang,L.-P. He,Q.-F. Guo,H.-J. Zhang,H.-F. Wang,X.-D. Wang and B. Chen."Solar coronagraph imager based on internal occulting in Lyman-alpha and visible bands".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 28.2(2020):303-314.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Solar coronagraph im（1537KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文