近红外偏振探测器的定标及非均匀性校正

Calibration and non-uniformity correction of near-infrared polarization detector

首先介绍了偏振探测器的结构,建立了探测器的信号响应模型,并基于该响应模型制定了相应的参数定标方案,实现了对入射辐射偏振态的高精度计算和对偏振图像的非均匀性校正。实验数据表明,校正后计算得到的线偏振度是真实值的97.8%~101.5%,满足了偏振探测的精度要求;强度图像和线偏振度图像相对于未校正图像的非均匀性分别降低了93.64%和93.67%,有效提高了图像质量。

The structure of the polarization detector is introduced firstly,the signal response model of the detector is established.Based on the signal response model,the corresponding parameter calibration scheme is made.High-precision calculation of polarization states of incident radiation and non-uniformity correction of polarization image are realized.The experimental data show that the calculated linear polarization is 97.8%~101.5%of the true value after calibration,which meets the accuracy requirements of polarization detection.The non-uniformity of intensity image and linear polarization image has been reduced by 93.64%and 93.67%respectively compared with the uncorrected image,and the image quality has been effectively improved.