云母1/4波片光谱性能分析

Analysis of the 1/4 Wave Plate's Spectral Performance

为了研究多次相干反射对云母1/4波片延迟量及透过率光谱性能的影响,根据光学薄膜干涉理论推导出考虑波片多次相干反射后的琼斯矩阵,讨论了镀增透膜前后波片延迟量及透过率光谱性能的变化。用椭偏仪和分光光度计测量了波片镀增透膜前后延迟量及透过率的光谱曲线,发现镀膜前波片的延迟量和透过率有明显的周期性振荡现象且曲线振荡峰值间隔和理论计算基本相符,而在镀增透膜后波片延迟量及透过率的振荡被很好地消除了,其光谱性能得到了改善。

In order to study how the multireflection effects the spectral performance of the glimmer 1/4 wave plate,we deduce the Jones matrix which contains the multireflection on the side surface and discuss the change of the retarders spectral performance before and after it is filmed. In testing ,we measure the spectral curve of the retarder and the transmission of the wave plate before and after it is filmed. The results show that the periodic oscillation of the retarder and the transmisson is obvious before it is filmed,and the interval of the oscillation peak is in accord with the theoretical analysis. But after the wave plate is filmed,the periodic oscillation is removed.