Study Of Modeling And Measuring Of Optical Polarized Scattering From Surfaces

Firstly, the purport and the development of the study is outlined in the paper. Secondly, from four aspects the primary contents of the paper is presented. By contrast with experimental data, the modeling and measuring of optical polarized scattering from different surfaces is studied. In the paper, by two methods the optical polarized reflectivity is computed of different substance, and offered the data for the next study of the laser scattering of target. The ellipsometry is presented to compute the optical constants of the substance, and ellipsometer is used to measure the optical constants of the different substance. From the experimental data, the optical characteristic of different diamond-like carbon film(DLC) is analysed at visible range(400nm~760nm), and the refractive index of DLC is fitted basing on the chromatic coordinate which is educed by Buchdahl. To the HfO2 film, the specimen can be verified from the analysis of the ultraviolet range. In the study of the optical constants, the Newton-iterative arithmetic and the reseau arithmetic are used to fitted the optical constants of the transparency, and are compared by contrast with the experimental and computed data. In the second part of the paper, the theory of scattering of the rough surfaces and the model of BRDF are presents. From the characteristic of surface, the LRCS and BRDF of the Si and DLC are computed by the perturbation theory, and the result is analysed. In the end, the three parametric model is ues to fit the BRDF of target.