弱散射产生的远场高斯散斑场的动态特性  

Dynamic characteristics of weak scattering produced far Gaussian speckle field

作　　者：陆同兴[1] 陈鼎[1] 汪千凯 

机构地区：[1]安徽师范大学,241000

出　　处：《中国激光》1991年第5期361-367,共7页Chinese Journal of Lasers

摘　　要：本文计算了三种不同表面相关下弱散射体平动时,散斑强度涨落的时-空交叉相关系数;用“非圆型度”和“束比”参数与交叉相关系数的关系,讨论了远场高斯散斑场的动态特性;提出了一种测量弱散射体运动速度的方法。The time-spatial cross-correlation coefficient of the intensity fluctuation of the speckle is calculated for three surface correlation in ease of moving weak scatterer. The dynamic characteristics of far Gaussian speckle field are considered by using the parameters 'non-circularity' and 'bunch ratio' and their dependence with the cross-correlation coefficient. A method capable of measuring the moving speed of the weak seatterer is put forward.

关 键 词：散射 高斯 散斑场 动态特性 速度 

分 类 号：O436.2[机械工程—光学工程]