Schmidt棱镜偏振像差的校正

Correction of Schmidt Prism by Polarizing Aberration

为了校正Schmidt棱镜的偏振像差,消除双像和鬼影像现象,根据棱镜Jones矩阵B因子与衍射光强的关系,推导出B因子与屋脊面反射相移差δ之间的关系,明确了消除偏振像差,要求B=0需要屋脊面反射相移差δ=π的条件。采用在屋脊面镀制相位膜的方案,对比了单层膜与多层膜的反射相移差特性,得到了在可见光区实现宽波段消除偏振像差的膜系特性;证明了B=0是一条可以同时校正所有不同偏振状态入射光偏振像差的有效技术途径。实验镀制了屋脊面相位膜样品,进行了多种入射光偏振状态下的偏振像差检测,得到了很好的消偏振像差结果。

In order to correct the polarization aberration of Schmidt prism and eliminate the double image and the ghost image, we derive the relationship between the factor B of the Jones matrix and the diffraction intensity. According to our derivation, the relationship between the factor B and the reflection phase shift δ on the roof surface is got. And the condition to eliminate the polarization aberration is to make the reflection phase shiftδ=πclear. We will coat the phase film on the roof surface and we compare the characters of reflection phase shift between the single film and multilayer film and the characteristics for eliminating the polarization aberration in the visible region are achieved. An effective technical way to correct the polarization aberration about every polarization state B=0 is proved to be true. We have coated the samples and tested the polarization aberration of every incident polarization state. The experimental results have a good agreement with the theoretical result.