Harvey-Shack theory for converging-diverging Gaussian beam

Zhanpeng Ma, Poul-Erik Hansen, Hu Wang, Mirza Karamehmedovic, Qinfang Chen

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The scattering characteristics of random rough surfaces illuminated with a 3D converging–diverging Gaussian beam are investigated by applying the conventional Harvey–Shack theory in conjunction with 2D planewave decomposition. The Gaussian beam is assumed to have an arbitrary angle of incidence and to be linearly s-polarized. Using data obtained from laser BRDF measurements on isotropic random rough surfaces with low surface roughness, we demonstrate that the Gaussian beam Harvey–Shack theory is in better accordance with the experimental data than the conventional Harvey–Shack theory. The two models become identical for a large beam waist radii but are significantly different for smaller ones.
Original languageEnglish
JournalJournal of the Optical Society of America B: Optical Physics
Issue number5
Pages (from-to)1162-1169
Publication statusPublished - 2023


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