双反射平行扩束偏光镜新设计  

New Design of Bireflective Parallel Distensible Beam Splitting Polarization Prism

作　　者：宋致堂[1] 盛宝立 李国华[1] 彭捍东[1] 孔凡美[1] 

机构地区：[1]曲阜师范大学激光研究所,山东曲阜273165 [2]滕州市西岗镇中心中学,山东滕州277519

出　　处：《中国激光》2009年第6期1428-1432,共5页Chinese Journal of Lasers

摘　　要：为了提高平行分束偏光棱镜的扩束比,提出了一种新的复合式平行扩束偏光镜设计方案。运用棱镜光扩束原理和菲涅耳公式,分析了影响扩束比和透射比的结构角、折射率等因素,使其在高透射比的基础上,很好地实现增大剪切差的效果及结构的优化设计,并伴有光路转向的作用。这在一定程度上减小光路搭建的直线长度,节约实验平台的使用空间。测试结果表明,这种新的偏光镜透射比和剪切差比较理想,理论值和实验值基本吻合。该复合偏光镜是一种较理想的平行分束偏光器件,具有较高的实用价值。In order to improve the extender ratio of parallelism beam splitting, a new design scheme of bireflective parallel distensible beam splitting prism is proposed. By using prism expanded beam principle and Fresnel formula, some factors, such as structure angle and refractive index, which influence the extender ratio and transmissivity are analyzed. The effects of increasing shear difference on the basis of high transmissivity and the optimal design of structure are properly realized in the new scheme. The scheme has the deflecting function which could decrease the linear length of rays path building and save space of flat roof in experiment. The testing results show that the transmissivity and the shear difference of this new polarization prism are perfect and the experimental values are in consistent with the theoretical analysis. It is an ideal parallel beam splitting polarization device and has important practical merits.

关 键 词：物理光学 双反射棱镜 平行分束 剪切差 

分 类 号：O436.3[机械工程—光学工程]