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Applied Optics

Applied Optics


  • Vol. 39, Iss. 33 — Nov. 20, 2000
  • pp: 6197–6206

Instrument to measure the bidirectional reflectance distribution function of surfaces

Kenneth J. Voss, Albert Chapin, Marco Monti, and Hao Zhang  »View Author Affiliations

Applied Optics, Vol. 39, Issue 33, pp. 6197-6206 (2000)

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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.

© 2000 Optical Society of America

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.5700) Instrumentation, measurement, and metrology : Reflection
(240.6700) Optics at surfaces : Surfaces

Original Manuscript: September 27, 1999
Revised Manuscript: August 9, 2000
Published: November 20, 2000

Kenneth J. Voss, Albert Chapin, Marco Monti, and Hao Zhang, "Instrument to measure the bidirectional reflectance distribution function of surfaces," Appl. Opt. 39, 6197-6206 (2000)

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