基于泰伯效应测量光栅常量  

Measuring grating constant based on Talbot effect

作　　者：李冬至 刘忠菊[2] 伍豪佳 梁禄业 李博琛 赵骞[2] LI Dong-zhi;LIU Zhong-ju;WU Hao-jia;LIANG Lu-ye;LI Bo-chen;ZHAO Qian(School of Advanced Manufacturing, Guangdong University of Technology, Jieyang 522000, China;School of Science, Shenyang University of Technology, Shenyang 110870, China)

机构地区：[1]广东工业大学先进制造学院,广东揭阳522000 [2]沈阳工业大学理学院,辽宁沈阳110870

出　　处：《物理实验》2022年第6期21-25,共5页Physics Experimentation

基　　金：辽宁省科技厅科技计划指导计划类项目(No.2019-ZD-0199);辽宁省教育厅科学研究经费项目(面上项目)(No.LJKZ0159)。

摘　　要：利用泰伯效应光栅自成像的周期性特点,借助LabVIEW软件实现自动化采集并实时分析数据,运用基础光机电元器件测量了一维光栅的光栅常量.通过自动化采集探测器移动过程中图像整体对比度的变化,获得实时对比度曲线,通过多个相邻的最大峰值位置获取周期图像平均间距得到泰伯距离,从而计算出光栅常量.该实验具有装置和操作简单、精度高、自动化程度高和图像可视化等特点.Taking advantage of the periodicity of Talbot effect grating self-imaging,with the help of LabVIEW to realize automatic collection and real-time data analysis,basic optical and electromechanical components were used to accurately measure the grating constants of one-dimensional gratings.The real-time contrast curve was obtained by the change of the overall contrast of the image during the movement of the detector.And the Talbot distance was obtained by obtaining the average spacing of periodic images through multiple adjacent maximum peak positions,thereby calculating the grating constant.The experiment had the characteristics of simple device and operation,high precision,high degree of automation and image visualization.

关 键 词：泰伯效应 光栅常量 自成像 对比度 

分 类 号：O436.1[机械工程—光学工程] TN247[理学—光学]