双洛匈棱镜的设计及性能分析  

Design and performance analysis of Double Rochon prism

作　　者：蒋琳琳[1] 吴福全[1] 薛林[1] 

机构地区：[1]曲阜师范大学激光研究所,山东曲阜273165

出　　处：《激光杂志》2011年第4期1-2,共2页Laser Journal

摘　　要：设计了一种新型偏光分束棱镜:双洛匈棱镜。给出了双洛匈棱镜分束角的精确表达式,并从理论上分析了分束角随棱镜结构角和入射光光波波长的变化关系,以及棱镜的光强分束比。结果表明:对于确定的单色光,分束角随结构角的增大而增大;对于确定的结构角,分束角则随入射光波长的增加而减小:棱镜的光强分束比近似为1。与常规洛匈棱镜的分束角比较可见,对于相同的棱镜结构角,双洛匈棱镜的分束角约为常规洛匈棱镜的两倍。这种棱镜的各个端面都可以制成高质量的光学表面,且分束角大,正反向使用性能相同,是一种理想的大分束角新型偏光分束镜。A new type of polarizing beam-splitter prism named Double Rochon prism is designed.Accurate formula for splitting angle of the prism is given,and changes of the splitting angle with structural angle of the prism and wavelength of incident light,together with light splitting intensity ratio are theoretically analyzed.The result shows that for certain monochromatic light,the splitting angle increases as structural angle increases while for certain structure angle,it decreases with the increase of incident wavelength.Light intensity splitting ratio is approximately 1.Compared to conventional Rochon prism with the same structural angle,the splitting angle of Double Rochon prism is twice that of conventional Rochon prism.The prism whose ends can be all made into high quality optical surfaces,with large splitting angle and the same performance in forward-use and backward use,is an ideal new polarizing beam-splitter prism.

关 键 词：偏振光学 偏光分束镜 分束角 光强分束比 

分 类 号：O436.3[机械工程—光学工程]