可变光阑对高斯光束衍射特性分析  

Diffraction characteristics of variable diaphragm on the fundamental Gaussian beam

作　　者：郭明浩 李阳光 杜霜蝶 付佳芳 李鹏 GUO Minghao;LI Yangguang;DU Shuangdie;FU Jiafang;LI Peng(School of Physics and Electronics,Henan University,Kaifeng 475004,China;National Demonstration Center for Experimental Physics and Electronics Education,Henan University,Kaifeng 475004,China)

机构地区：[1]河南大学物理与电子学院,河南开封475004 [2]河南大学国家级物理与电子实验教学示范中心,河南开封475004

出　　处：《物理实验》2024年第1期42-46,共5页Physics Experimentation

基　　金：国家自然科学基金青年科学基金项目(No.12104131);2023年度河南大学本科专业核心课程提质建设项目(No.20230024);河南大学2022年度大学生创新创业训练计划项目(No.20221011008)。

摘　　要：可变光阑作为常见的光学器件,广泛应用于光束整形和空间滤波.根据可变光阑的工作原理可知,其通光孔是多边弧形而非圆形,这导致当光束经可变光阑衍射时,近场会出现齿状光斑.本文对可变光阑的近场衍射图像进行了实验测量,并且采用Matlab对多边弧形的衍射特性进行了理论仿真,理论仿真结果与实验观测结果一致.As a common optical device,variable diaphragm has been widely used in beam shaping and spatial filtering experiments.The working principle of the variable diaphragm determines that its aperture is not a round hole,but a multilateral arc,which leads to some interesting spot patterns in the near field when the light is diffracted by the variable diaphragm,such as gear-shaped pattern.In this paper,the detailed experiments about the near-field diffraction phenomenon of the variable diaphragm were performed,and theoretical simulations were conducted by using the Matlab on the diffraction of a multilateral arc diaphragm.The theoretical simulation was coincident with the experimental results.

关 键 词：可变光阑 近场衍射 高斯光束 

分 类 号：O436.1[机械工程—光学工程]