大气与环境光学学报

• “高分五号卫星载荷研制”专辑 • 上一篇    下一篇

多角度偏振成像仪相对光谱响应定标方法

翁建文1,2, 袁银麟1, 康晴1, 涂碧海1, 李健军1, 洪津1, 郑小兵   

  1. 1~中国科学院安徽光学精密机械研究所中国科学院通用光学定标与表征技术重点实验室~ 安徽~合肥\quad 230031;\\
    2~中国科学技术大学, 安徽~合肥\quad 230026
  • 出版日期:2019-01-28 发布日期:2019-01-29

Calibration Methods of Relative Spectral Response of  Directional Polarization Camera

WENG Jianwen1,2, YUAN Yinlin1, KANG Qing1, TU Bihai1, LI Jianjun1, HONG Jin1, ZHENG Xiaobing1   

  1. 1~Key  Laboratory  of  Optical  Calibration  and  Characterization,
     Anhui  Institute  of  Optics  and  Fine  Mechanics,  Chinese  Academy  of  Sciences
    ,\quad Hefei~~ 230031, China;\\
    2~University of Science and Technology of China,\quad Hefei~~230026, China
  • Published:2019-01-28 Online:2019-01-29

摘要: 相对光谱响应是检测和评估多角度偏振成像仪性能的基本参数之一。采用基于激光泵浦氙灯光源的单色仪、消偏器、参考探测器和45°分束镜,
搭建了一套多角度偏振成像仪相对光谱响应测量装置。采用分束镜同步测量的方法,降低光源的非稳定性影响;针对测试过程繁琐和测试时间长的问题,
在基于现有不同开发平台开发的单色仪和数据采集系统的基础上,采用ActiveX控件与动态链接库技术,研制了一套相对光谱响应自动测试系统,降低时间
非稳定性影响,提高测量精度和效率。采用多角度偏振成像仪490 nm和865 nm偏振通道作为应用案例,开展了相对光谱响应的整机测试实验。实验结果
表明多角度偏振成像仪中心波长测量极差值与带宽均值的比值精度在0.11%以内,满足响应非一致性优于0.6%的定标要求。

关键词: 光谱, 偏振成像仪, 单色仪;同步测量, 自动测试系统

Abstract: The relative spectral respone is one of the basic parameters for detection and evaluation
of the performance of the directional polarization camera. A set of devices to measure relative spectral response of
the directional polarization camera was assembled, which consisted of laser pumping xenon light source monochromator,
 depolarizer,  reference detector and 45° beam splitter. The synchronization measurement method of beam splitter
was utilized to reduce the instability of the light source. On the basis of monochromator and data acquisition system
developed by different development platforms, an automatic testing system for the relative spectral response was
developed by using ActiveX and dynamic link library technology to solve problems of complex testing process and long testing time.  
This automatic testing system has reduced the impact of time stability, and improved accuracy and efficiency of the measurement.
Taking 490 nm and 865 nm channel of the directional polarimetic camera as an example of application, the experiment of
relative spectral response in instrumental level measurements was carried out. The experimental results showed that the
accuracy of the ratio between measured range value of the center wavelength and the average value of the bandwidth of
directional polarimetic camera is within 0.11%, which meets the responsivity non-uniformity calibration requirement of less than 0.6%.

Key words: spectrum, polarization camera, monochromator, synchronization measurement, automatic testing system

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