散斑
The method of speckles displacement, a new attempt to test characters of space distribution of laser Gaussian beam, is presented. 提出一种测量激光高斯光束空间分布特征的新方法散斑位移法。
The diffraction formula and statistical law of optical fields are used to get the cross-correlation function of intensities of laser speckles of the moved diffuse object. 该方法利用光传播的菲涅尔衍射公式和光场的统计规律，给出散斑场光强在散射体位移前后的高斯光束相关函数的表达式。
