偏光棱镜中受抑全内反射现象的研究

Phenomena of frustrated total internal reflection in polarizing prism

由于偏光棱镜中的受抑全内反射现象的存在,导致偏光棱镜中部分o光透射,从而降低了偏光棱镜的消光比。为了尽可能的消除受抑全内反射现象带来的不良影响,本文以Glan型棱镜为例,运用薄膜光学理论,对偏光棱镜中的这种现象进行了系统的研究,理论分析和实验测试均表明:胶合层间隙越大,胶合剂的折射率越小,o光的透射比越小;在同一间隙下,波长越小,棱镜的结构角越大,o光的透射比越小,越有利于提高棱镜的消光比。

Because of the frustrated total internal reflection in polarizing prism, a part of o light transmitted which dropped the extinction ratio. In order to avoid the blight, using layer optics theories at Glan, the phenomena was studied experimentally and theoretically. The results indicated that：the bigger cementing layer and smaller glue refracting index,the smaller transmission ratio;In the same space,the samller wavelength and the bigger frame angle,the smaller transmission ratio,which exceed increasing extinction ratio of the prism