动态微粒场双脉冲全息图再现像的分离技术  

Separation technique for recoustructed images of double-pulse-exposed particle field hologram

作　　者：赵达尊[1] 梅文辉 杨坚 

机构地区：[1]北京理工大学工程光学系,100081

出　　处：《光学技术》1993年第3期7-8,共2页Optical Technique

基　　金：高等学校博士学科点专项科研基金

摘　　要：双脉全息图可应用于动态微粒场中粒子形状、尺寸、密度和速度等分布参数的测定。但由于两个脉冲时刻所拍摄的粒子像只能同时再现,不能判断粒子运动速度的方向,在运动情况较复杂时,粒子的“配对”也很困难。本文提出一种技术,可以分别再现两个脉冲时刻的粒子场图像,从而实现粒子速度方向的判定,同时减小了配对困难。Oridinary double-pulse-exposed holography can be used to measure a number of particle parameters, including particle speed, in a dynamic particle field, however, since two particle field images recorede at different pulse moments are reconstructed simultaneously, the direction of particle movement can not he determined. A preliminary report of the technique proposed for alleviating this problem is given in this article, by which two particle field images corresponding to different pulse moments can be reconstructed sparately with the help of polarization beam splitter and spatial filtering. Experimental resuets are given too.

关 键 词：微粒场 测量 脉冲全息图 空间滤波 

分 类 号：TB877[一般工业技术—摄影技术]