基于孔径分割的全斯托克斯测量仪的误差分析

发布时间：2018-04-19 17:52

本文选题：孔径分割 + 斯托克斯矢量　；参考：《红外与激光工程》2017年10期

【摘要】：基于孔径分割的全斯托克斯测量仪可以获取目标的全部偏振信息,但是偏振探测仪器自身的误差会影响测量结果的准确度,因此需要对测量仪获取斯托克斯矢量[S0,S1,S2,S3]时的测量误差进行分析。首先,研究了偏振光学中斯托克斯矢量相关理论;其次,介绍了基于孔径分割的全斯托克斯测量仪的工作原理和测量原理。然后,分析了测量仪获取斯托克斯矢量时的误差源。最后,仿真分析了该误差源对斯托克斯矢量和目标偏振信息(偏振度、椭率角和方位角)的影响。最终仿真结果表明:波片相位延迟量±5°时,偏振度和椭率角的相对误差为1.16%、4.55%,波片快轴方向相对于x轴的角度为±2°时,方位角的相对误差为7.68%;CCD探测器的噪声信噪比为40 d B时,偏振度、椭率角和方位角的相对误差约为1%。分析结果为实验装置元件参数的选择提供参考依据,为基于孔径分割的全斯托克斯测量仪的优化提供理论支持。
[Abstract]:The full Stokes measuring instrument based on Aperture Segmentation can obtain all the polarization information of the target, but the error of the polarization detector itself will affect the accuracy of the measurement results.Therefore, it is necessary to analyze the measurement error when the measuring instrument acquires the Stokes vector [S0 S1, S2S3].Firstly, the correlation theory of Stokes vector in polarized light is studied. Secondly, the working principle and measuring principle of full Stokes measuring instrument based on aperture division are introduced.Then, the error source when the measuring instrument acquires Stokes vector is analyzed.Finally, the effect of the error source on Stokes vector and polarization information (polarization degree, ellipsometry angle and azimuth) is analyzed.The final simulation results show that the relative error of polarization degree and ellipticity angle is 1.164.55 when the phase delay of wave plate is 卤5 掳, the relative error of azimuth is 7.68 when the angle of fast axis direction to x axis is 卤2 掳, and the signal-to-noise ratio of CCD detector is 40 dB.The relative error of polarization, ellipticity and azimuth is about 1.The results provide a reference for the selection of the parameters of the experimental device and theoretical support for the optimization of the full Stokes measuring instrument based on the aperture segmentation.
【作者单位】：西安邮电大学电子工程学院;
【基金】：国家自然科学基金(61475190)
【分类号】：O436.3;TH741

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