25 October 1999 Coherent and incoherent scattering from rough surfaces: influence of the angle of incidence
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Abstract
The study deals with coherent and incoherent optical scattering from rough surfaces. The purpose is to analyze the evolution of the properties when the angle of incidence varies. A numerical study is led for one-dimensional randomly rough surface by means of both surface integral method and approximate Rayleigh random grating methods. The evaluation of the surface coherent intensity reflection factor is detailed for both numerical techniques. The problem is considered for a general dielectric homogeneous material. Numerical results are presented in the case of different absorbing dielectric materials, and for reflecting materials as metals in the infrared range or as SiC around 11 micrometer. The angular domain concerned goes from normal incidence to the mean surface up to very oblique angles such as 70 degrees. Results are presented for the different materials for the coherent intensity reflection factors and for the diffuse reflection patterns in relation to the angle of incidence and to the roughness parameters. Comparisons are given with the Kirchhoff Approximation model.
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Stephane Mainguy, Stephane Mainguy, Brigitte Pouligny, Brigitte Pouligny, } "Coherent and incoherent scattering from rough surfaces: influence of the angle of incidence", Proc. SPIE 3784, Rough Surface Scattering and Contamination, (25 October 1999); doi: 10.1117/12.366708; https://doi.org/10.1117/12.366708
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