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 language | English (US) |
|---|---|
| Pages (from-to) | 6197-6206 |
| Number of pages | 10 |
| Journal | Applied Optics |
| Volume | 39 |
| Issue number | 33 |
| DOIs | |
| State | Published - Nov 20 2000 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
- Electrical and Electronic Engineering
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Cite this
Voss, K. J., Chapin, A., Monti, M., & Zhang, H. (2000). Instrument to measure the bidirectional reflectance distribution function of surfaces. Applied Optics, 39(33), 6197-6206. https://doi.org/10.1364/AO.39.006197