偏振激光散斑的偏振态测量研究  

Measurement ofPolarization State of Polarized Laser Speckle

作　　者：聂建林 胡小英[1] 肖生柱 NIE Jianlin;HU Xiaoying;XIAO Shengzhu(School of Optoelectronic Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]西安工业大学光电工程学院,西安710021

出　　处：《自动化与仪器仪表》2022年第3期199-202,共4页Automation & Instrumentation

基　　金：国防基础研究项目(A0920110019);陕西省重点实验室开放基金(ZSKJ201301);总装先进制造(51318020303)。

摘　　要：偏振激光散斑偏振态的问题已进行过深入的研究,但在大多数研究中,没有考虑具有影响透射光的偏振和传播方向的各向异性折射率材料。为了对各向异性介质产生的偏振激光散斑展开研究,采用马赫-曾德尔干涉仪的方法,搭建偏振干涉实验光路,用MATLAB对双折射散射板产生的偏振激光散斑进行处理并分析。实验结果表明,各向异性折射率材料会影响透射光的偏振和传播方向,与普通磨砂玻璃相比,双折射散射板产生的偏振激光散斑图包含了更多的偏振信息,即椭圆偏振态、线偏振态和圆偏振态,而不是单一的一种偏振态。这对具有随机偏振态的表面散射现象的研究奠定了基础。The polarization state of polarized laser speckle has been studied in depth,but in most studies,anisotropic refractive index materials that affect polarization and propagation direction of transmitted light are not considered.In order to study the polarized laser speckle generated by anisotropic media,the optical path of polarization interference experiment is established by means of Mach-Zehnder interferometer.And the polarized laser speckle generated by the birefringent scattering plate is processed and analyzed by MATLAB.Experimental results show that anisotropic refractive index materials affect the polarization and propagation direction of transmitted light.Compared with common frosted-glass,the polarized laser speckle produced by birefringent scattering plate contains more polarization information i.e.elliptical polarization state,linear polarization state and circular polarization state,rather than a single polarization state.This lays a foundation for the study of surface scattering with random polarization states.

关 键 词：偏振激光散斑 偏振干涉仪 斯托克斯参数 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]