The computational simulations of the Gaussian correlation random surface and its lightscattering speckle field and the analysis of the intensity probability density

The method for the simulational generation of Gaussian correlation random s urfaces is proposed, and the computational simulation of the speckle field produced by this kind of surfaces on the Fraunhofer plane is performed. 100 00 speckle field samples at each spatial point produced by 10000 surface sa mples are taken as an ensemble and the probability density distributions of such speckle intensity ensembles are examined. We find that the Gaussian a nd non-Gaussian characteristics of the speckle fields are space-dependent, and that Gaussian speckles can also be formed when the scattering surfaces contains only a few scatterers.