Suppression of stray light for long focal length off-axis three-mirror optical system

LI Xiao-ping; SHA Sheng-chun; HU Ting-liang

doi:10.3788/OPE.20111911.2603

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Suppression of stray light for long focal length off-axis three-mirror optical system

Article | 更新时间：2020-08-12

- Suppression of stray light for long focal length off-axis three-mirror optical system
- Optics and Precision Engineering Vol. 19, Issue 11, Pages: 2603-2608(2011)
- 作者机构：
  
  中国科学院上海技术物理研究所上海,200083
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111911.2603
  CLC： TH703
- Received：02 June 2011，
  
  Revised：06 July 2011，
  
  Published Online：25 November 2011，
  
  Published：25 November 2011
- 稿件说明：
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李晓平, 沙晟春, 胡亭亮. 长焦距离轴三反光学系统杂散光的抑制[J]. 光学精密工程, 2011,19(11): 2603-2608

LI Xiao-ping, SHA Sheng-chun, HU Ting-liang. Suppression of stray light for long focal length off-axis three-mirror optical system[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2603-2608
李晓平, 沙晟春, 胡亭亮. 长焦距离轴三反光学系统杂散光的抑制[J]. 光学精密工程, 2011,19(11): 2603-2608 DOI： 10.3788/OPE.20111911.2603.

LI Xiao-ping, SHA Sheng-chun, HU Ting-liang. Suppression of stray light for long focal length off-axis three-mirror optical system[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2603-2608 DOI： 10.3788/OPE.20111911.2603.

摘要

对有中间像的长焦距离轴三反系统的杂散光特性进行了模拟分析

并提出了相应的杂散光抑制方法。通过正追和倒追的分析方式

确定系统杂散光的主要来源

找到系统的重要面;根据分析结果

提出了杂散光抑制措施

用系统重要面的变化定性评价杂散光的抑制效果。分析结果表明

采用抑制措施后很好地抑制了系统的一次散射杂散光。用点源透过率(PST)定量评价光学系统的消杂散光能力

分别计算东西、南北方向离轴角为40的PST值

并结合光机系统的应用环境对系统的杂散光抑制能力进行了定量分析。

Abstract

Stray light characteristics of an off-axis three-mirror optical system with a middle image and long-focus was simulated and analyzed

and corresponding suppression method for the stray light was proposed. By a forward and reverse ray tracing method

the main source of stray light was identified and an important surface of the system was found out. According to the analysis results

some corresponding suppression measures were proposed to reduce the stray light of the optical system. The effect of stray light reduction were evaluated by comparing the number of important surfaces before and after the measures. The analysis results show that the first-order scattering stray light has been well suppressed. Furthermore

the Point Source Transmission (PST) was used to evaluate the stray light suppression capability

and its quantitative analysis was impletmented by calculating the PST of 40 off-axis angles in EW and NS

respectively.

关键词

Keywords

references

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