Photodiode-based bi-directional reflectance distribution function (BRDF) measurement
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United States of America Patent
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Apr 19, 2011
Grant Date -
Mar 26, 2009
app pub date -
Jul 15, 2008
filing date -
Sep 25, 2007
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Abstract
Photodiode-based bi-directional reflectance distribution function (BRDF) measurement is described. Multiple photodiodes are distributed approximately symmetrically at a fixed distance from a surface to be measured. One or more of the photodiodes are directed to emit light, while readings are gathered from the other photodiodes that are not emitting light. The readings are processed based on previously measured calibration data to generate BRDF values.
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