对偏振控制板匀滑随机位相板产生的干涉斑纹的特性进行了理论分析和数值模拟 ,用叠加在光强包络上的斑纹对比度来评价偏振控制板的匀滑作用 ,结果表明结构最简单的二单元偏振控制板对远场光斑具有最佳匀滑效果。 Theoretical analysis and numerical simulation of the characteristics of the interference fringes produced by the uniform phase plate of the polarization control plate are carried out. The contrast of the polarization plate superimposed on the light intensity envelope is used to evaluate the smoothing effect of the polarization control plate. The results show that the structure is the simplest Two-unit polarization control panel has the best uniform smoothing effect on the far field spot.