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Proceedings Paper

Using the on-axis BSDF at a dielectric surface to model the BSDF at off-axis angles
Author(s): William J. Cassarly
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Paper Abstract

The Bidirectional scattering distribution function (BSDF) is used to describe the multidimensional aspect of light scattering properties of a surface. Often, the BSDF is broken into the two parts: the bidirectional reflectance distribution function (BRDF), and the bidirectional transmittance distribution function (BTDF). In this paper, we investigate the onaxis BTDF at a dielectric surface (i.e., a surface where the index of refraction is different on the two sides of the surface) and show how it relates to the off-axis BRDF and BTDF of textured surfaces that are commonly used in illumination modeling and design. Numerous interesting Monte Carlo simulation results are provided.

Paper Details

Date Published: 21 September 2011
PDF: 8 pages
Proc. SPIE 8170, Illumination Optics II, 81700L (21 September 2011); doi: 10.1117/12.897290
Show Author Affiliations
William J. Cassarly, Synopsys, Inc. (United States)

Published in SPIE Proceedings Vol. 8170:
Illumination Optics II
Tina E. Kidger; Stuart David, Editor(s)

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