Wollaston式平行分束偏光棱镜的光学特性分析  

Analysis of Optical Properties of Wollaston-type Parallel-splitting Prism

作　　者：朱化凤 韩瑞芳 郭文婷 焦志勇 

机构地区：[1]中国石油大学理学院,山东青岛266580

出　　处：《光子学报》2013年第9期1118-1122,共5页Acta Photonica Sinica

基　　金：中央高校基本科研业务费专项基金(Nos.14CX02021A;20121174);山东省自然科学基金项目(No.ZR2012DL12);瞬态光学与光子技术国家重点实验室开放基金(No.SKLST201204)资助

摘　　要：根据折射定律结合棱镜的结构特点，推导出了Wollaston式平行分束偏光棱镜所对应的切割角应满足的关系．利用菲涅尔公式和薄膜的光强透射理论，推导出棱镜的光强透射比、光强分束比和两出射光束的平行度表达式．通过Matlab数值模拟，研究并实验测量了棱镜的光强透射比、光强分柬比和出射光平行度随入射角或入射波长的变化关系．结果表明：出射光束的平行度与实验结果符合得非常好，光强透射比规律与理论结果一致．Wollaston式平行分束偏光棱镜的光强透射比和光强分柬比随入射角有微小的起伏变化，当入射光束的入射角在-3°～3°的范围内入射或波长在（400～1100）nm范围内变化时，两光束之间的夹角不超过0．42°，平行度稳定性较好．Based on the structure of the prism, the cut angle of Wollaston-type parallel-splitting polarizing prism is derived by using refraction law. The intensity transmittance, the splitting ratio and the parallel degree of the two output beams are deduced by using Fresnel formula and intensity transmittance theory of thin film. The variation relationships of law of intensity transmittance, splitting ratio and the parallel degree of the two output beams with incidence angle or incident wavelength are simulated under the Matlab environment. Experimental results of the intensity transmittance and the parallel degree varying with incident angle are obtained. The parallel degree is in good coincidence with the theoretical one and the law of intensity transmittance agrees with the theoretical one. Both theoretical and experimental results show that the intensity transmittance and the intensity splitting ratio of the Wollaston-type parallel-splitting polarizing prism fluctuate slightly with the incident angle and the incident wavelength. The included angle of the two beams is not more than 0.42 and maintains a good parallelism when the incident angle is in the range of （-3- 3）° or the wavelength in range of 400-1 100 nm.

关 键 词：WOLLASTON棱镜 切割角 光强透射比 光强分束比 平行出射 

分 类 号：O436.3[机械工程—光学工程]