摘要
提出了模拟产生高斯相关随机表面的方法，并模拟产生了这类表面在夫琅禾费面上产生的散斑场．以模拟产生的１００００ 个随机表面作为表面样本系综，对具有不同粗糙度和横向相关长度的表面系综在夫琅禾费面上各点产生的散斑光强系综的概率密度分布进行了分析．发现：（１） 散斑场的高斯和非高斯特性在空间上按一定的区域分布，并非整幅散斑图皆为高斯或非高斯散斑；（２） 散射表面只包含少数散射颗粒时也可以形成高斯散斑．
The method for the simulational generation of Gaussian correlation random surfaces is proposed,and the computational simulation of the speckle field produced by this kind of surfaces on the Fraunhofer plane is performed.10000 speckle field samples at each spatial point produced by 10000 surface samples are taken as an ensemble and the probability density distributions of such speckle intensity ensembles are examined.We find that the Gaussian and 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. PACC: 4220; 4230
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第9期1635-1643,共9页
Acta Physica Sinica
