Instrument to measure the bidirectional reflectance distribution function of surfaces

Kenneth Voss, Albert Chapin, Marco Monti, Hao Zhang

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)6197-6206
Number of pages10
JournalApplied Optics
Volume39
Issue number33
StatePublished - Nov 20 2000

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bidirectional reflectance
Distribution functions
distribution functions
illumination
Lighting
zenith
azimuth
sands
flat surfaces
reflectance
color
Demonstrations
Sand
Color

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Instrument to measure the bidirectional reflectance distribution function of surfaces. / Voss, Kenneth; Chapin, Albert; Monti, Marco; Zhang, Hao.

In: Applied Optics, Vol. 39, No. 33, 20.11.2000, p. 6197-6206.

Research output: Contribution to journalArticle

Voss, K, Chapin, A, Monti, M & Zhang, H 2000, 'Instrument to measure the bidirectional reflectance distribution function of surfaces', Applied Optics, vol. 39, no. 33, pp. 6197-6206.
Voss, Kenneth ; Chapin, Albert ; Monti, Marco ; Zhang, Hao. / Instrument to measure the bidirectional reflectance distribution function of surfaces. In: Applied Optics. 2000 ; Vol. 39, No. 33. pp. 6197-6206.
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