电荷耦合器件（CCD）相机信噪比对阵列测量精度的影响。

Impact of CCD camera SNR on polarimetric accuracy.

作者信息

Chen Zhenyue, Wang Xia, Pacheco Shaun, Liang Rongguang

出版信息

Appl Opt. 2014 Nov 10;53(32):7649-56. doi: 10.1364/AO.53.007649.

DOI:10.1364/AO.53.007649

Abstract

A comprehensive charge-coupled device (CCD) camera noise model is employed to study the impact of CCD camera signal-to-noise ratio (SNR) on polarimetric accuracy. The study shows that the standard deviations of the measured degree of linear polarization (DoLP) and angle of linear polarization (AoLP) are mainly dependent on the camera SNR. With increase in the camera SNR, both the measurement errors and the standard deviations caused by the CCD camera noise decrease. When the DoLP of the incident light is smaller than 0.1, the camera SNR should be at least 75 to achieve a measurement error of less than 0.01. When the input DoLP is larger than 0.5, a SNR of 15 is sufficient to achieve the same measurement accuracy. An experiment is carried out to verify the simulation results.

摘要

采用一种综合电荷耦合器件（CCD）相机噪声模型来研究CCD相机信噪比（SNR）对偏振精度的影响。研究表明，测得的线性偏振度（DoLP）和线性偏振角（AoLP）的标准偏差主要取决于相机的SNR。随着相机SNR的增加，由CCD相机噪声引起的测量误差和标准偏差均减小。当入射光的DoLP小于0.1时，相机SNR应至少为75才能实现小于0.01的测量误差。当输入DoLP大于0.5时，15的SNR足以实现相同的测量精度。进行了一项实验以验证模拟结果。