部分相干光束通过傅立叶变换系统偏振态的变化

基于空间－频率域的部分相干光理论，研究了部分相干光束通过傅立叶变换系统后偏振 变化，并以ＧＭＳ光束为例，进行了理论计算，结果表明：入射场的空间相干性对出射场的偏度影响极大，具体数值依赖于入射光场两分量的空间相关长度之比。

Change of Polarization of Partially Coherent Light Beam Passing Through a Fourier Transform System

Based on the theory of partial coherence in spacefrequency domain, the change of polarization state of a partial coherent light beam passing through a Fourier trans form system is studied. As an example, Gaussian Schellmodel (GSM) beam is analyzed in detail. An explicit expression is obtained for the degree of polarization at the output plane of Fourier transform system. The results show that the spatial coherence of incident field has a strong influence on the polarization state of ouput beam. The polazrization degree of output beam depends on the ratial between the spatial correlation lengths of two components of incident field. Radial-distributions of the polarization degree of output beam are different for defferent Fourier transform system.