The relation between the correlationfunction of intensity variation and surface roughness parameter is derived through analyzing the second-order statistical properties of the speckle image.
分析此散斑图像的二阶统计特性，导出了强度变化的相关函数和表面粗糙度参数之间的关系。
2
The influence of atomic motion, the field structure and intensity of photons on second-ordercorrelationfunction and two-mode correlation function are obtained by numerical calculation.