星载大气痕量气体差分吸收光谱仪杂散光抑制

周海金; 刘文清; 司福祺; 江宇; 薛辉

doi:10.3788/OPE.20122011.2331

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星载大气痕量气体差分吸收光谱仪杂散光抑制

现代应用光学 | 更新时间：2020-08-12

- 星载大气痕量气体差分吸收光谱仪杂散光抑制
- Stray light suppression of space-borne differential optical absorption spectrometer for monitoring atmospheric trace gas
- 光学精密工程 2012年20卷第11期页码：2331-2337
- 作者机构：
  
  1. 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室,安徽合肥,230031
  2. 中国科学技术大学精密机械与精密仪器系,安徽合肥 230026
- 作者简介：
- 基金信息：
  
  公益性行业(气象)科研专项经费资助项目(No. GYHY201106045-1)()
- DOI：10.3788/OPE.20122011.2331
  中图分类号： TH774.12;TP73
- 收稿日期：2012-04-18，
  
  修回日期：2012-06-13，
  
  纸质出版日期：2012-11-10
- 稿件说明：
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周海金, 刘文清, 司福祺, 江宇, 薛辉. 星载大气痕量气体差分吸收光谱仪杂散光抑制[J]. 光学精密工程, 2012,20(11): 2331-2337

ZHOU Hai-jin, LIU Wen-qing, SI Fu-qi, JIANG Yu, XUE Hui. Stray light suppression of space-borne differential optical absorption spectrometer for monitoring atmospheric trace gas[J]. Editorial Office of Optics and Precision Engineering, 2012,20(11): 2331-2337
周海金, 刘文清, 司福祺, 江宇, 薛辉. 星载大气痕量气体差分吸收光谱仪杂散光抑制[J]. 光学精密工程, 2012,20(11): 2331-2337 DOI： 10.3788/OPE.20122011.2331.

ZHOU Hai-jin, LIU Wen-qing, SI Fu-qi, JIANG Yu, XUE Hui. Stray light suppression of space-borne differential optical absorption spectrometer for monitoring atmospheric trace gas[J]. Editorial Office of Optics and Precision Engineering, 2012,20(11): 2331-2337 DOI： 10.3788/OPE.20122011.2331.

摘要

考虑杂散光对星载大气痕量气体差分吸收光谱仪测量精度的影响

设计了遮光罩和其他消杂光结构来抑制杂散光

并对杂散光进行了分析。利用TracePro软件分析了系统紫外通道1(240~315 nm)的杂散光水平

确定了杂散光传输的一次、二次散射路径。根据杂散光传输路径

计算了杂散光评价指标点源透射比(PST)曲线

结果显示杂散光抑制措施效果明显

PST小于310

-5

中心视场杂散光照度水平为5.47210

-4

最终杂散光水平达到了设计指标要求。采用截止滤光片法测量了系统的杂散光水平

结果表明:中心视场杂散光比值为8.16710

-4

和仿真结果接近

验证了仿真过程的准确性

说明设计的消杂光机构能够满足抑制系统杂散光的要求。

Abstract

In consideration of the effect of stray light on the measurement accuracy of a space-borne differential optical absorption spectrometer for monitoring atmospheric trace gases

several stray light removing mechanisms including a light shield and other baffles were developed to suppress the stray light

and the properties of the stray light were analyzed. With TracePro model

the stray light removing of UV channel 1(240-315 nm) in the system was evaluated

then the first and second order scattering paths were determined by simulation analysis. On the basis of stray light paths

the stray light removing for revised system was analyzed

and Point Source Transmittance(PST) was calculated. The obtained PST value shows that the light shield and other mechanisms have suppressed the stray light effectively

PST values are less than 310

-5

and stray radiation ratio in a central field is 5.47210

-4

. Furthermore

the final stray light suppressing level of the system satisfies the requirement of design index. Moreover

the edge filter method is used to measure the stray light level

and the results indicate that the stray light in the central field is 8.16710

-4

which is close to the simulation results and proves the simulation result to be credible.

关键词

Keywords

references

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