基于傅里叶光学理论的声驻波成像分析  

Study of ultrasonic standing wave imaging based on Fourier optics principle

作　　者：张博一 熊畅[2] 胡斌 唐芳[2] 李朝荣[2] ZHANG Bo-yi;XIONG Chang;HU Bin;TANG Fang;LI Chao-rong(School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China;School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China;School of Electronic Information Engineering, Beihang University, Beijing 100191, China)

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191 [2]北京航空航天大学物理科学与核能工程学院,北京100191 [3]北京航空航天大学电子信息工程学院,北京100191

出　　处：《大学物理》2019年第4期54-58,共5页College Physics

基　　金：北京航空航天大学重大教改基金项目资助

摘　　要：基于傅里叶光学理论研究了激光通过声光衍射现象的产生和声驻波的成像过程,并设计实验验证了理论推导的正确性.针对不同空间滤波方式,分析声驻波成像条纹间距和条纹对比度的变化,提出一种新的用空间滤波手段测量声速的实验方法.该理论研究及相关实验,完整地分析了声驻波的成像问题,也有利于加深对傅里叶光学中的空间滤波的理解.Based on the Fourier optics principle, the diffraction of a laser transmitting through a standing wave and the imaging of that standing wave are studied. A spatial filtering experiment is designed to verify the formulas which describes the fringe interval and contrast of the standing wave image. This method can also measure sound velocity of the standing wave. We analyze the standing wave imaging completely and help to have a deeper understanding of the spatial filtering method.

关 键 词：傅里叶光学 声驻波 空间滤波 声速测量 

分 类 号：O436[机械工程—光学工程]