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Proceedings Paper

In SITU Bidirectional Reflectance Distribution Function (BRDF) Measurement Facility
Author(s): B. M. Kale; Barry Broome
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Paper Abstract

The angular distribution of light scattered from optical surfaces is best described by a Bidirectional Reflectance Distribution Function (BRDF). Scattered light in spaceborne optical systems may be induced by surface contaminants that are present only under the combined conditions of extreme cold, high vacuum, and strong ultraviolet radiation. An instrument is described that gqnerates surface contaminants and measures BRDF in situ. Measurements are performed at 10-0 Tarr pressure and at 77K for angular scatter ranging from one degree away from the specular reflected beam to sixty degrees away from the specular reflected beam. Measured BRDF intensity ranges from 10-° watt per incident watt per steradian to 10-6 watt per incident watt per steradian.

Paper Details

Date Published: 4 April 1979
PDF: 5 pages
Proc. SPIE 0171, Optical Components: Manufacture and Evaluation, (4 April 1979); doi: 10.1117/12.957048
Show Author Affiliations
B. M. Kale, Aerojet ElectroSystems Company (United States)
Barry Broome, Aerojet ElectroSystems Company (United States)


Published in SPIE Proceedings Vol. 0171:
Optical Components: Manufacture and Evaluation
Donald S. Nicholson, Editor(s)

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