动态干涉仪的位相光栅衍射效率研究

发布时间：2018-04-27 20:36

本文选题：光学干涉测量 + 动态干涉仪　；参考：《红外与激光工程》2015年09期

【摘要】：为了解决普通二维光栅在动态干涉术中光能量利用不足的问题,使用标量衍射理论和傅里叶分析法对矩形正交位相光栅和棋盘型位相光栅的衍射效率进行推导,分别对两种光栅的最佳工作级次选择策略进行研究。分析结果表明,当分光器件为矩形正交位相光栅时,应选择(0,±1)级与(±1,0)级作为动态干涉仪的工作级次,光能量利用率达到54.4%;当分光器件为棋盘位相光栅时,应选择(±1,±1)级作为动态干涉仪的工作级次,光能量利用率达到65%。实验对比了两种光栅在动态干涉仪上的应用效果,当选用(±1,±1)级作为工作级次时,结果表明使用棋盘型位相光栅的应用效果优于矩形正交位相光栅。因此在动态干涉仪中使用棋盘位相光栅并选用(±1,±1)级作为工作级次能够消除光能量利用不足对测量造成的影响。
[Abstract]:In order to solve the problem of insufficient use of optical energy in dynamic interferometry, the diffraction efficiency of rectangular quadrature phase grating and chessboard phase grating is deduced by scalar diffraction theory and Fourier analysis method. The optimal selection strategies of the two kinds of gratings are studied respectively. The results show that when the optical splitter is a rectangular quadrature phase grating, the order of 0, 卤1) and (卤1 0) should be chosen as the working order of the dynamic interferometer, and the optical energy utilization ratio is 54.4, and when the splitter is the chessboard phase grating, The order of (卤1, 卤1) should be chosen as the working order of the dynamic interferometer, and the utilization ratio of light energy can reach 65%. The application effect of two kinds of gratings in dynamic interferometer is compared experimentally. When (卤1, 卤1) order is chosen as the working order, the results show that the application effect of the chessboard phase grating is better than that of rectangular orthogonal phase grating. Therefore, using the chessboard phase grating and (卤1, 卤1) order as the working order in the dynamic interferometer can eliminate the influence of the underutilization of optical energy on the measurement.
【作者单位】：南京理工大学电子工程与光电技术学院;中国科学院安徽光学精密机械研究所;
【基金】：国家自然科学基金(61108041;U1231111)
【分类号】：TH744.3

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