空间相机消杂光设计及仿真

钟兴; 贾继强

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空间相机消杂光设计及仿真

微纳技术与精密机械 | 更新时间：2020-08-12

- 空间相机消杂光设计及仿真
- Stray light removing design and simulation of spaceborne camera
- 光学精密工程 2009年17卷第3期页码：621-625
- 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. 中国科学院研究生院北京,100039
- 作者简介：
- 基金信息：
  
  国家863高技术研究发展计划资助项目(No.2007AA12Z113)()
- DOI：
  中图分类号： V475.2;V241.03
- 收稿日期：2008-09-05，
  
  修回日期：2008-10-27，
  
  网络出版日期：2009-03-25，
  
  纸质出版日期：2009-03-25
- 稿件说明：
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钟兴, 贾继强. 空间相机消杂光设计及仿真[J]. 光学精密工程, 2009,17(3): 621-625

ZHONG Xing, JIA Ji-qiang. Stray light removing design and simulation of spaceborne camera[J]. Editorial Office of Optics and Precision Engineering, 2009,17(3): 621-625
钟兴, 贾继强. 空间相机消杂光设计及仿真[J]. 光学精密工程, 2009,17(3): 621-625 DOI：

ZHONG Xing, JIA Ji-qiang. Stray light removing design and simulation of spaceborne camera[J]. Editorial Office of Optics and Precision Engineering, 2009,17(3): 621-625 DOI：

摘要

针对空间相机中的杂光会引起像质模糊和对比度下降问题

设计了空间相机消杂光机构。研究的空间相机基于同轴三反系统

消杂光机构主要由内外镜筒、视场光阑、里奥光阑和挡光板组成。在内外镜筒的设计中参考了卡塞格林系统的设计方法并利用CAD建模进行辅助设计。为了对消杂光效果进行评价

采用了基于计算机随机光线Monte-Carlo仿真方法。介绍了对表面的散射特性进行描述的双向散射模型、关键面的选取和模型的建立。利用计算机分析得到了空间相机的杂光系数和点源透射比的曲线

子午方向+10入射的杂光在像面造成的杂光系数在0.35％以下

0~20的非成像视场点源透射比为10

-6

量级

该结果可作为进一步优化设计消杂光系统的参考依据。

Abstract

A stray light removing mechanism is designed for improving image contrast and image deblurring in a spaceborne camera. The spaceborne camera researched in this paper is based on on-axis Three Mirror Anastigmatics(TMA)

and the stray light removing mechanism consists of inner and outer baffles

field stop

Lyot stop and blocking board. Cassegrain system is taken as a reference in the CAD modeling for design of inner and outer baffles and the random light Moente-Carlo simulation method is adopted to evaluate the effect of stray light removing. Moreover

the Bidirectional Scattering Distribution Function(BSDF) for describing the scatter character of surfaces

choice of key surfaces and the establishment of model are introduced and the stray light ratio and Point Source Transmittance(PST) curves are acquired by computer analysis.Results show that the stay light ratio is below 0.35% when stay light incidents at +10 meridional direction and the PST is at the level of 10

-6

in 0~20. These results can offer a good reference for the further optimization design.

关键词

Keywords

references

史光辉. 消除卡塞格林系统杂散光的措施[J]. 光学精密工程,1997,5(5):10-16. SHI G H. Methods preventing stray light emergenced in cassegrain systems [J]. Opt. Precision.Eng.,1997,5(5):10-16. (in Chinese)[2] 钟兴. 反射光学系统杂散光的消除[J]. 红外与激光工程,2008,37(2):316-318. ZHONG X. Stray light removing of reflective optical system. [J]. Infrared and Laser Engineering, 2008,37(2):316-318. (in Chinese)[3] ANDREW T Y. Design of cassegrain light shields[J]. App. Opt.,1967,6(6):1063-1067.[4] SONG N. Baffles design for an axial two-mirror telescope [J]. Opt. Eng., 2002,41(9):2353-2356.[5] ROBERT P B. Current technology of stray light .SPIE, 1986,675:2-12.[6] 黄强. 空间光学系统的杂散光分析[J]. 红外,2006,27(1):26-33. HUANG Q. Analysis of stray light in space optical system[J]. Infrared. 2006,27(1):26-33. (in Chinese)[7] B UMER S. SLIOS- a contribution to standard procedures in stray light measurements . SPIE,1999,3739:414-421. [8] SCHLICK C. A Survey of shading and reflectance models .Computer Graphics Forum, 1994,13(2):121-131.[9] HARVEY J E,KOTHA A. Scattering effects from residual optical fabrication errors . SPIE, 1995,2576:155-174.[10] Lambda Research Corporation.EO-1 stray light analysis report No. 3 . Lambda Research Corporation,1998.

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