近红外偏振探测器校正方法
Received:September 26, 2017  Revised:January 24, 2018  点此下载全文
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Author NameAffiliationE-mail
HUANG Fei Shanghai Institute of Technical Physics of the Chinese Academy of Sciences hfkllzj@163.com 
LI Fan-Ming Shanghai Institute of Technical Physics of the Chinese Academy of Sciences  
WANG Shi-Yong Shanghai Institute of Technical Physics of the Chinese Academy of Sciences  
CHEN Chao-Shuai Shanghai Institute of Technical Physics of the Chinese Academy of Sciences  
SHI Yong-Biao Shanghai Institute of Technical Physics of the Chinese Academy of Sciences  
基金项目:基金项目:国家十三五国防预研项目(Jzx2016-0404/Y72-2);上海市现场物证重点实验室基金资助项目(2017xcwzk08)
中文摘要:近红外偏振探测器是近年来一种新的探测器结构,它将光栅附在了焦平面探测器的表面。为了解决光栅透射率和角度不均匀对线偏振度测量的影响,采用了一种新的线偏振度求解方法。该方法对光栅透射率和光栅角度进行了校正,消除了光栅透射率和光栅角度不均匀性对偏振度测量的影响,理论上表明了红外偏振成像质量与光栅透射率和光栅角度无关。实验结果显示,在使用黑体作为标定光源和不考虑偏振像元之间串扰的情况下,采用原有的计算方法得到的结果是真实值的14%~24%,透射率校正后的结果是真实值的80%~120%,透射率和角度校正后的结果是真实值的96%~104%。
中文关键词:红外偏振  透射率校正  角度校正
 
NIR polarization detector calibration method
Abstract:The report introduces a new NIR polarization detector. It is fabricated out of a wire grid polarizer attaching to the surface of a FPA. A brand new method solving linear polarization was proposed at the same time. The transmittance and the angle of the wire grid are corrected and the affect on the polarization measurement is also eliminated in this report. Theoretically, the infrared polarized image quality is independent of the transmittance and angle of wire grid. The experiment uses blackbody as the calibration light source. The result shows that, while ignoring the crosstalk between the polarized pixels, the value is about 14% - 24% of the true value. After adding the transmittance correction, the data reaches the level of 80% - 120% while it becomes 96% to 104% by applying the angle correction.
keywords:Infrared polarization,Transmittance calibration,Angle calibration
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Copyright:《Journal of Infrared And Millimeter Waves》