| Wollaston棱镜对发散光束的分束特性分析 |
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| 引用本文： | 薛林,吴福全,蒋琳琳.Wollaston棱镜对发散光束的分束特性分析[J].激光技术,2011,35(6):833-836. |
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| 作者姓名： | 薛林 吴福全 蒋琳琳 |
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| 作者单位： | 1.曲阜师范大学激光研究所山东省激光偏光与信息技术重点实验室, 曲阜 273165 |
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| 摘 要： | 为了了解Wollaston棱镜用于发散光束时对出射o光束、e光束发散角的影响,利用折射定律对发散光束两边缘光线通过Wollaston棱镜后的o光、e光分束角进行了推导,采用控制变量法分析了发散光束经过Wollaston棱镜后出射的o光束和e光束的变化,得出了Wollaston棱镜对出射o光束、e光束发散角的影响。结果表明,相对入射光束的发散角,Wollaston棱镜对o光束有减小发散角的作用,对e光束有增大发散角的作用;对于一定结构角的棱镜,当入射光的波长变大时,o光束发散角增大,而e光束发散角减小;对于确定的单色发散光束,当结构角增大时,o光束发散角减小,而e光束发散角增大;无论是入射光的波长还是棱镜结构角的变化,对出射o光束、e光束发散角的影响都是有限的。由此可见,在要求不是太高的应用中,可以忽略Wollaston棱镜对出射o光束、e光束发散角的影响。
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| 关 键 词： | 光学器件 Wollaston棱镜 控制变量法 发散光束 发散角 |
| 收稿时间： | 2011-01-16 |
Effect of Wollaston prism on splitting properties of divergent beam |
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| XUE Lin,WU Fu-quan,JIANG Lin-lin.Effect of Wollaston prism on splitting properties of divergent beam[J].Laser Technology,2011,35(6):833-836. |
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| Authors: | XUE Lin WU Fu-quan JIANG Lin-lin |
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| Abstract: | In order to know the effect of a Wollaston prism on o beam and e beam when it is applied to divergent beam, the splitting angles of o light and e light were respectively deduced according to refraction law when both edge rays of the divergent beam incident on a Wollaston prism. The variation of emergent o beam and e beam was analyzed with the method of controlling variables as divergent beam passing through a Wollaston prism, and the effect of a Wollaston prism on the divergent angle of obeam and e beam was obtained. The result show the divergent angle of o beam becomes larger than that of the incident beam and the divergent angle of e beam becomes larger; For a prism with given structure angles, the divergent angle of o beam increases when the wavelength of incident light increases, but the divergent angle of e beam decreases. For a certain monochromatic divergent beam, the divergent angle of o beam increases with the decrease of structure angle, while e beam increased with it. Both of the changes of incident light's wavelength and prism's structure angle have limit effect on the divergent angles of o beam and e beam. The effect of a Wollaston prism on the divergent angles of o beam and e beam can be neglected in the application with lower precision requirements. |
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