为了研究二元复合波片的退偏性能,采用了理论和实验相结合方法,对不同的波片复合后的米勒矩阵形式进行了理论分析和实验验证。结果表明,让两波片以不同的角速度绕光线为轴旋转,当复合波片为一个λ/4波片和一个λ/2波片组合时,只要它们的角速度满足一定的比例时,可以组合成一个比较理想的退偏器;当复合波片为两个λ/4波片组合或为两个λ/2波片组合时,无论怎样旋转都不能组合成理想退偏器。理论和实验相符合。这对指导二元复合波片退偏器的制作和在激光工程中应用具有参考意义。

In order to study the depolarization of compound binary wave plates,Mueller matrixes of different combined wave-plates were studied by means of theoretical analysis and experimental verification.An ideal depolarizer can be combined with a λ/2 wave-plate and a λ/4 wave-plate rotating at different angular velocities with a certain ratio.Ideal depolarization can’t be obtained from the combination of two λ/4 wave-plates or two λ/2 wave-plates.Experimental results are in agreement with those in theory.This study is a good guidance for the fabrication of compound binary wave plates and their application in laser engineering.