Hybrid model of reflection of a light from diffuse scattering surfaces

A new approach to design models of processes of shaping a speckle-structure is represented. The numerical model, offered by us, shows shaping of a signal by a rough surface. The topography can be set by the optical behaviour of a material, inhomogeneity of coats, non single reflection, and shadowing of separate devices of a surface etc. As against traditional expedients of model operation of fields we offer a hybrid model of distribution of a wave-front taking into account features of a near-field region, and also those of Fresnel and Fraunhofer zones. This approach enables one to consider different cases of the attitude of a wavelength of sounding radiation and reference linear dimensions of a grain. The numerical model defines energy and phase characteristics of dispelled radiation that is important for adequate exposition of processes which shape speckle-structures. The model has shown good correspondence to model representations of an actual object.