Design and Stray Light Suppression in Spectral Imaging Coronagraph (SICG), Meridian Project Phase II
文献类型：期刊论文
| 作者 | Huang, Yu-Peng3,4; Wang, Tai-Sheng4; Sun, Ming-Zhe2; Zhang XF(张雪飞)1; Shi, Cheng-Yong4; Li, Bing-Qiang3,4; Wang, Jin-Cheng4; Xu, Jia4; Zhang, Hong-Xin4 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2026-01-30 |
| 卷号 | 26期号:1 |
| 关键词 | Sun: corona Sun: coronal mass ejections (CMEs) techniques: image processing |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/ae13a3 |
| 产权排序 | 第4完成单位 |
| 文献子类 | Article |
| 英文摘要 | The Spectral Imaging Coronagraph (SICG), deployed at Lijiang Observatory (3200m), is China's first ground-based coronagraph and is part of the Meridian Project Phase II. It is an internal occulted coronagraph, and this paper describes its design and stray light suppression details. The SICG has a 200 mm aperture, an F-number of 6.7, and dual-channel observation capabilities at 530.3 nm (Fe XIV) and 637.4 nm (Fe X), with a Field of View (FOV) ranging from 1.05 to 2R(circle dot) (R-circle dot represents the solar radius). Detailed stray light suppression methods are presented, including the use of ultra-smooth polishing techniques on the primary lens, five group of baffles and a Lyot Spot is employed to suppress corresponding stray light. A unique design was the addition of a primary lens monitoring system in the optical path, allowing the observation of dust adhesion on the lens simultaneously. Stray light measurement was conducted in the laboratory, with an inner FOV of 6 * 10(-6) B-circle dot (B-circle dot represents the mean brightness of the solar disk) at 1.05 R-circle dot and an outer FOV of 2 * 10(-6)B(circle dot) at 2 R-circle dot. These designs ensure that SICG can achieve stable and clear coronagraphic observations, and successfully captured its first image of the solar corona in 2023 October. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | MAGNETIC-FIELD ; SOLAR ; BRIGHTNESS ; SYSTEM ; NORIKURA ; MISSION |
| 资助项目 | Chinese Meridian Project (CMP); National Natural Science Foundation of China[41627806] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001633536600001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Chinese Meridian Project (CMP) ; National Natural Science Foundation of China[41627806] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28775]  |
| 专题 | 无名山观测站 |
| 通讯作者 | Zhang, Hong-Xin |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China 2.Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China; 3.University of the Chinese Academy of Sciences, Beijing 100049, China; 4.Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; firsthongxin@163.com; |
| 推荐引用方式 GB/T 7714 | Huang, Yu-Peng,Wang, Tai-Sheng,Sun, Ming-Zhe,et al. Design and Stray Light Suppression in Spectral Imaging Coronagraph (SICG), Meridian Project Phase II[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2026,26(1). |
| APA | Huang, Yu-Peng.,Wang, Tai-Sheng.,Sun, Ming-Zhe.,张雪飞.,Shi, Cheng-Yong.,...&Zhang, Hong-Xin.(2026).Design and Stray Light Suppression in Spectral Imaging Coronagraph (SICG), Meridian Project Phase II.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,26(1). |
| MLA | Huang, Yu-Peng,et al."Design and Stray Light Suppression in Spectral Imaging Coronagraph (SICG), Meridian Project Phase II".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 26.1(2026). |
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来源：云南天文台
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