用激光多普勒效应远距离测量固体散射表面的位移  

Remote Displacement Measurement of Solid Scattering Surface Utilizing Laser Doppler Effect

作　　者：洪昕[1] 贺顺忠[1] 蒋诚志[1] 陈林才[1] 

机构地区：[1]天津大学精仪与光电子工程学院

出　　处：《光学学报》2001年第1期118-121,共4页Acta Optica Sinica

基　　金：国家教委博士点基金项目

摘　　要：利用激光多普勒效应实现了远距离固体表面的横向位移测量。从理论上分析了双光束差动结构的多普勒频移 ,设计了声光调制、双光束差动、大口径接收的光路系统和计算机实时跟踪补偿的位移测量系统。分别对普通纸张表面和金属表面进行实际测量 ,测量距离为 10m ,测量精度为± 0 .4%。The remote displacement measurement was realized utilizing laser Doppler effect. The Doppler shift of differential structure was analyzed theoretically. The displacement measurement system of double beam differential acoustooptic modulating structure, large aperture collection of backward scattering light and real time compensation of the losing signal by computer tracking software was designed. The displacement measurement of paper and metal at a distance of 10 meters was made with an accuracy of ±0.4%.

关 键 词：激光多普勒效应 声光调制 大口径接收 远距离位移测量 固体表面 散射 

分 类 号：O348.1[理学—固体力学]