Title

Four-parameter model for polarization-resolved rough-surface BRDF

Authors

Authors

I. G. E. Renhorn; T. Hallberg; D. Bergstrom;G. D. Boreman

Comments

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Abbreviated Journal Title

Opt. Express

Keywords

DIRECTIONAL-HEMISPHERICAL REFLECTANCE; BIDIRECTIONAL REFLECTANCE; SPECULAR REFLECTION; SCATTERING; LIGHT; Optics

Abstract

A modeling procedure is demonstrated, which allows representation of polarization-resolved BRDF data using only four parameters: the real and imaginary parts of an effective refractive index with an added parameter taking grazing incidence absorption into account and an angular-scattering parameter determined from the BRDF measurement of a chosen angle of incidence, preferably close to normal incidence. These parameters allow accurate predictions of s- and p-polarized BRDF for a painted rough surface, over three decades of variation in BRDF magnitude. To characterize any particular surface of interest, the measurements required to determine these four parameters are the directional hemispherical reflectance (DHR) for s- and p-polarized input radiation and the BRDF at a selected angle of incidence. The DHR data describes the angular and polarization dependence, as well as providing the overall normalization constraint. The resulting model conserves energy and fulfills the reciprocity criteria. (C) 2011 Optical Society of America

Journal Title

Optics Express

Volume

19

Issue/Number

2

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

1027

Last Page

1036

WOS Identifier

WOS:000286314600062

ISSN

1094-4087

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