High precision and highly functional channeled spectropolarimetry

本课题旨在提高通道分光偏振法的基本性能，增强通道分光偏振法的功能。分析了造成系统误差的两大原因，一是校准用偏光镜的透射率不稳定，二是传感头的偏振缺陷。通过消除误差因素的影响，获得了0.1°的偏振测量精度。引入色散补偿传感头，提高了光谱偏振测量的波长分辨率。波长扫描激光器的加入使我们能够将通道分光偏振法应用于穆勒矩阵测量和偏振样品的二维测量。

This project aimed to improve the basic performance and enhance the functions of the channeled spectropolarimetry. We found two causes of the systematic errors, the transmittance instability of the polarizer for the calibration and the polarization imperfection of the sensing head. By eliminating the effects of the error causes, the accuracies of 0.1deg in the polarization measurement were obtained. The wavelength resolution of the spectroscopic polarization measurement was enhanced by introducing the dispersion compensated sensing head. The incorporation of the wavelength scanning laser enables us to apply the channeled spectropolarimetry for the Mueller matrix measurement and the two-dimensional measurement of polarimetric samples.