Optical system and stray light suppression of Lyot coronagraph

Jinpeng CHI; Hongxin ZHANG; Xiaodong WANG; Qingyu MENG; Zichang QIN; Yunhui LI; Taisheng WANG; Fengyou Li

doi:10.37188/OPE.20223017.2050

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Optical system and stray light suppression of Lyot coronagraph

Modern Applied Optics | 更新时间：2022-10-08

- Optical system and stray light suppression of Lyot coronagraph
- Optics and Precision Engineering Vol. 30, Issue 17, Pages: 2050-2057(2022)
- 作者机构：
  
  1.中国科学院长春光学精密机械与物理研究所，吉林长春 130033
  2.中国科学院大学，北京 100049
- 作者简介：
- 基金信息：
- DOI：10.37188/OPE.20223017.2050
  CLC： TH753.12
- Received：26 January 2022，
  
  Revised：25 February 2022，
  
  Published：10 September 2022
- 稿件说明：
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迟金鹏,张红鑫,王晓东等.Lyot星冕仪光学系统及杂散光抑制[J].光学精密工程,2022,30(17):2050-2057.

CHI Jinpeng,ZHANG Hongxin,WANG Xiaodong,et al.Optical system and stray light suppression of Lyot coronagraph[J].Optics and Precision Engineering,2022,30(17):2050-2057.
迟金鹏,张红鑫,王晓东等.Lyot星冕仪光学系统及杂散光抑制[J].光学精密工程,2022,30(17):2050-2057. DOI： 10.37188/OPE.20223017.2050.

CHI Jinpeng,ZHANG Hongxin,WANG Xiaodong,et al.Optical system and stray light suppression of Lyot coronagraph[J].Optics and Precision Engineering,2022,30(17):2050-2057. DOI： 10.37188/OPE.20223017.2050.

摘要

木卫一等离子体环是木星磁层中密度最大、研究最广泛的区域。为满足木卫一等离子体环的观测需求，设计了一种用于行星大气光谱望远镜（Planetary Atmospheric Spectral telescope， PAST）的Lyot星冕仪。根据木星的辐射特性与PAST参数确定仪器参数，给出Lyot星冕仪的初始结构并进行优化；分析了Lyot星冕仪的成像性能，系统在37 lp/mm的MTF

0.6，满足成像质量要求；确定系统杂散光成因，利用物像共轭关系设计相应的杂散光抑制结构，在千级超净间对Lyot星冕仪进行杂散光抑制水平检测。实验结果表明：系统主要杂散光得到了有效抑制，系统的杂散光抑制水平在

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=35461858&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=35461855&type=

7.87400007

3.21733332

处为

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=35461864&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=35461861&type=

5.75733376

2.62466669

量级，满足地基观测木卫一等离子体环要求。

Abstract

The Io plasma torus is the most densest and most widely studied region of Jupiter's magnetosphere. To meet observe the Io plasma torus observation， a Lyot Coronagraph was installed in the planet's atmosphere spectrum telescope to meet the needs of imaging observation of Io plasma torus capture the emissive spectrum. The parameters of the instrument were determined according to the radiation characteristics of the Jupiter and the parameters of PAST. Then， the initial structure was optimized. The imaging performance of the system was analyzed， and the MTF value at 37 lp/mm is above 0.6 that meet the design specification. Considering the character of stray light in system， a structure system for suppressing stray light was built considering the characteristics of stray light. The level of stray light in the system was measured in a class 1 000 cleanroom. The experimental results show that the main sources of stray light can be suppressed entirely， and the stray light suppression level of the system is equal to 10

at 2.5

， which satisfies the system requirements for observing Io plasma torus.

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