高斯界面反射超声散斑场的数字模拟

针对超声散斑实验方法中误差大、过程繁琐等缺点，提出了采用计算机模拟产生超声散斑场的方法。利用模拟产生的高斯相关随机表面，模拟产生了这类表面在夫琅禾费面上的散斑场。为了和实验产生的散斑场进行对比，建立了超声散斑场接收的实验系统，取与计算模拟相同的参数，获得了实验散斑场。通过对比发现：计算机模拟产生的散斑场强度更大、散斑颗粒更多、对比度更好，更便于分析和研究使用。

Digital simulation of ultrasonic speckle field back scattered from a Gaussian interface

Ultrasonic speckle experimental methods have large measuring errors and operation processes are com-plicated.For this reason, the method for the computer simulated generation of ultrasonic speckle field is pro-posed.Using the Gaussian correlation random surfaces that are generated by simulation , the simulation of the speckle field produced by this kind of surfaces on the Fraunhofer plane is performed .To compare the difference between speckle field from experiment and speckle field by the simulation , the ultrasonic speckle field receiving experimental system is established and the experimental speckle field is obtained with the same parameters in the simulation .By contrast , the ultrasonic speckle field that is generated by the simulation has higher intensity , more speckles, and it is more convenient for analysis and research .