Document Detail


Instrument to measure the bidirectional reflectance distribution function of surfaces.
MedLine Citation:
PMID:  18354628     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
A new instrument to measure the in situ bidirectional reflectance distribution function (BRDF) of surfaces is described. This instrument measures the BRDF for eight illumination angles from 0 to 65 deg, three colors (475, 570, and 658 nm), and at over 100 selected viewing angles. The viewing zenith angles range from 5 to 65 deg, and the azimuth angles, relative to the illumination direction, range from 0 to ?180 deg. Many tests of the system have been run and show that for flat surfaces the BRDF of a sample surface can be measured with a precision of 1-5% and an accuracy of 10% of the measured reflectance. The BRDF for a dry and wet sand sample is presented as a demonstration of the instrument.
Authors:
K J Voss; A Chapin; M Monti; H Zhang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  39     ISSN:  0003-6935     ISO Abbreviation:  Appl Opt     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2008-03-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6197-206     Citation Subset:  -    
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