拉曼-奈斯型声光衍射效应实验仪  

Raman-Nath acousto-optic diffraction effect experiment instrument

作　　者：吴泳波[1] 吴先球[1] 黄佐华[1] 唐志列[1] WU Yong-bo;WU Xian-qiu;HUANG Zuo-hua;TANG Zhi-lie(National Demonstration Center for Experimental Physics Education, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China)

机构地区：[1]华南师范大学,物理与电信工程学院,物理国家级实验教学示范中心,广东广州510006

出　　处：《物理实验》2020年第10期33-39,共7页Physics Experimentation

基　　金：2018年广东省质量工程建设项目

摘　　要：通过傅里叶光学分析,阐述了拉曼-奈斯衍射条件下超声驻波成像的本质.设计了拉曼-奈斯型声光衍射效应综合实验仪,验证了当激光垂直穿过驻波超声光栅后的光场含有一系列中心频率间隔为超声波频率的非相干光,根据实际条件简化了光场总强度分布表达式.The physical nature of ultrasound standing wave imaging under the conditions of Raman-Nath diffraction was explained through the analysis method of Fourier optics.A set of Raman-Nath type acousto-optic diffraction effect experiment instrument was designed to verify that the light field after the laser passed vertically through the standing wave ultrasonic grating contained a series of incoherent light whose center frequency was separated by the ultrasonic frequency.In the course of the experiment,the expression of the total intensity distribution of the light field obtained by linearly superimposing the intensity of the series of incoherent light was simplified and verified according to the actual conditions.

关 键 词：拉曼-奈斯衍射 声光衍射 超声光栅 衍射光强 

分 类 号：O438.2[机械工程—光学工程]