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Light polarization state analyzer based on two spatial carrier frequencies method

机译：基于两个空间载频方法的偏振态分析仪

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摘要

The device for the measurements of light polarization state parameters distributions has been presented. It consists of two Wollaston like prisms (acting as spatial frequency generators), a linear analyzer, a CCD camera and a computer with the specific software. The 2D Fourier transform of the recorded output intensity distribution contains two nonzero carrier frequencies. The areas around these frequencies carry the information about the azimuth and the ellipticity angles distributions of the examined light assuming that the variations of these parameters are with the frequency much lower than the analyzer's carrier frequencies. Applying the Fourier transform methods of masking, shifting and inverse Fourier transform with regard to these two areas, one can receive the wanted light polarization state distributions. The main merits of this technique are: (1) the reconstruction of the polarization parameters distributions from one recorded output image only, (2) the setup's compactness and no movable or electronically driven components. The paper presents the setup details, critical points of adjusting setup procedure and numerical analysis, as well as the theoretical and experimental results for uniform and non-uniform examined waves. The accuracy of the tests was estimated as λ/100.
机译：已经提出了用于测量光偏振态参数分布的装置。它由两个像沃拉斯顿的棱镜（充当空间频率发生器），线性分析仪，CCD照相机和一台带有特定软件的计算机组成。记录的输出强度分布的2D傅里叶变换包含两个非零载波频率。假设这些参数的变化频率远低于分析仪的载波频率，则这些频率周围的区域将携带有关所检查光的方位角和椭圆度分布的信息。针对这两个区域应用掩蔽，移位和傅里叶逆变换的傅里叶变换方法，可以接收所需的光偏振态分布。该技术的主要优点是：（1）仅从一个记录的输出图像重建偏振参数分布；（2）装置的紧凑性，没有可移动或电子驱动的组件。本文介绍了设置细节，调整设置程序和数值分析的关键点，以及均匀和非均匀检查波的理论和实验结果。测试的准确性估计为λ/ 100。

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