Measurement and correction of stray light of space-borne high resolution imaging spectrometer

ZHANG Jun-qiang; WU Qing-wen; YAN Chang-xiang

doi:10.3788/OPE.20111903.0552

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Measurement and correction of stray light of space-borne high resolution imaging spectrometer

Article | 更新时间：2020-08-12

- Measurement and correction of stray light of space-borne high resolution imaging spectrometer
- Optics and Precision Engineering Vol. 19, Issue 3, Pages: 552-560(2011)
- 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：
- DOI：10.3788/OPE.20111903.0552
  CLC： TP73
- Received：31 December 2009，
  
  Revised：04 February 2010，
  
  Published Online：22 March 2011，
  
  Published：22 March 2011
- 稿件说明：
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张军强, 吴清文, 颜昌翔. 星载成像光谱仪杂散光测量与修正[J]. 光学精密工程, 2011,19(3): 552-560

ZHANG Jun-qiang, WU Qing-wen, YAN Chang-xiang. Measurement and correction of stray light of space-borne high resolution imaging spectrometer[J]. Editorial Office of Optics and Precision Engineering, 2011,19(3): 552-560
张军强, 吴清文, 颜昌翔. 星载成像光谱仪杂散光测量与修正[J]. 光学精密工程, 2011,19(3): 552-560 DOI： 10.3788/OPE.20111903.0552.

ZHANG Jun-qiang, WU Qing-wen, YAN Chang-xiang. Measurement and correction of stray light of space-borne high resolution imaging spectrometer[J]. Editorial Office of Optics and Precision Engineering, 2011,19(3): 552-560 DOI： 10.3788/OPE.20111903.0552.

摘要

分析了星载成像光谱仪杂散光的来源和危害

研究了杂散光对此类光谱仪光谱测量精度的影响。介绍了用点扩散函数描述成像光谱仪杂散光的原理

推导了杂散光影响矩阵和杂散光修正矩阵的求解

给出了杂散光测量和修正的具体方案

并对测量和修正精度进行了分析。实验表明

基于点扩散函数的矩阵法可实现成像光谱仪杂散光的测量和修正。像元中心波长入射时

修正后有效信号降低不足1%

杂散光信号降低至少99%;像元中心波长和非像元中心波长同时入射时

修正后像元中心波长处有效信号降低7%左右

非像元中心波长处有效信号降低25%左右

杂散光信号降低近50%。最后

从原理上解释了杂散光修正效果受入射光波长影响的原因。

Abstract

To reduce the influence of stray lights on the spectral measurement accuracy of a High Resolution Imaging Spectrometer(HRIS)

sources and hazards of stray lights were analyzed. Based on the Point Spread Function (PSF) theory which is usually used to describe the stray lights of HRISs

the influence matrix and the correction matrix of stray lights were discussed. The measurements and specific correction programs were given

and the accuracies of measurement and correction were analysed. The results show that the method based on PSF can complete the measurement and correction of stray lights for the HRIS. For a pixel center wavelength incident light

the effective signal is only reduced no more than 1%

while the stray light signal is reduced at least by 99% as compared with the raw data. For both pixel center wavelength and non-pixel center wavelength incident lights

the corrected signals are reduced by about 7% at the pixel center wavelength and by nearly 25% at the non-pixel center wavelength

while the stray light signal is reduced by almost 50%. Finally

the theoretical reasons why the incident light wavelength affected the stray light correction were explained.

关键词

Keywords

references

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