Study of the structure of the stay light suppressing of the white light coronagraph optical system

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Study of the structure of the stay light suppressing of the white light coronagraph optical system

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- Study of the structure of the stay light suppressing of the white light coronagraph optical system
- Optics and Precision Engineering Vol. 17, Issue 10, Pages: 2371-2376(2009)
- 作者机构：
  
  长春光机所2. 中科院长春光机所3. 山东大学威海分校空间科学与物理学院4. 长春光学精密机械与物理研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：10 February 2009，
  
  Revised：02 April 2009，
  
  Published Online：20 October 2009，
  
  Published：20 October 2009
- 稿件说明：
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张红鑫,卢振武,夏利东,刘华. 白光日冕仪光学系统杂散光抑制[J]. 光学精密工程, 2009,17(10):2371-2376

Study of the structure of the stay light suppressing of the white light coronagraph optical system[J]. Optics and precision engineering, 2009, 17(10): 2371-2376.
张红鑫,卢振武,夏利东,刘华. 白光日冕仪光学系统杂散光抑制[J]. 光学精密工程, 2009,17(10):2371-2376 DOI：

Study of the structure of the stay light suppressing of the white light coronagraph optical system[J]. Optics and precision engineering, 2009, 17(10): 2371-2376. DOI：

摘要

“夸父计划”是由“L1+极轨”的三颗卫星组成的一个空间观测系统，夸父A星中一个重要的仪器是白光日冕仪(2.5 R⊙ -15 R⊙ )，并且在我国是首次研制。日冕仪的工作特点决定了其对杂散光抑制要求及其严格。本文通过分析系统工作特点，设计了白光日冕仪，系统视场4度、角分辨率14角秒、口径30mm、焦距200mm、系统总长1080mm、其中光学系统370mm，37pl/mm的MTF值大于0.5；根据其杂散光抑制的结构特点，利用多个光阑互相共轭的空间位置关系，系统的四个主要杂散光光源从结构上被全部抑制，从而达到了良好的杂光抑制水平。

Abstract

“KuaFu Mission” is an “L1 + Polar” triple satellite project. KuaFu is composed of three spacecraft. A white light coronagraph (2.5 R⊙ to 15 R⊙ ) is a key instrument in the “KuaFu A”. It is the first time for us to fabricate the satellite-based coronagraph. The coronagraph requires the strict stray light suppressing. In this paper

based on the principle of the coronagraph

its optical character and the basic rules of suppressing the stay light are analyzed. The external occurred white light coronagraph is designed. In this system

the FOV is 4 degree

the resolution is 14 arc sec

the aperture is 30mm

the focal length is 200mm

the total length is 1080mm

the length of the optical structure is 370mm

and the MTF value at 37pl/mm is above 0.5. With the help of the conjugated stops

the four main stray light sources are totally suppressed

and a very high stray light suppressing level is obtained.

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