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Proceedings Paper

Bidirectional Reflectance Distribution Function Of Gold-Plated Sandpaper
Author(s): E. L Dereniak; T W. Stuhlinger; F. O. Bartell
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Paper Abstract

The use of gold-plated sandpaper was investigated as a standard Lambertian reference reflector. Various grit sizes from 3 μm to 400 μm and material types (i.e., silicon carbide or aluminum oxide, were studied. The different gold-plated sandpaper grit sizes were measured in the same way using three laser wavelengths (0.6328 μm, 3.39 μm, and 10.6 μm) at five angles of incidence of the source (0', 10°, 20°, 30°, and 60'). All the scatter-ing measurements presented were taken in the plane of incidence. The best choice of sand-paper grit size was compared to other commonly used reflectors such as magnesium oxide, halon, sintered bronze, and flowers of sulfur. An attempt was made to correlate surface roughness (size of grit) to the degree of approximation to a good Lambertian reflector, but it was found that grit size is not as important as filling factor, or density of particles, over a given area. It was found that fairly good approximations to Lambertian behavior result when the angle of incidence is small, but not when the angle of incidence is as large as 60°.

Paper Details

Date Published: 3 March 1981
PDF: 8 pages
Proc. SPIE 0257, Radiation Scattering in Optical Systems, (3 March 1981); doi: 10.1117/12.959615
Show Author Affiliations
E. L Dereniak, University of Arizona (United States)
T W. Stuhlinger, University of Arizona (United States)
F. O. Bartell, University of Arizona (United States)

Published in SPIE Proceedings Vol. 0257:
Radiation Scattering in Optical Systems
Gary H. Hunt, Editor(s)

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