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Proceedings Paper

The NIST Robotic Optical Scatter Instrument (ROSI) and its application to BRDF measurements of diffuse reflectance standards for remote sensing
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Paper Abstract

We describe the robotic optical scatter instrument (ROSI), a new robotic arm-based goniometer for in-plane and outof- plane reflectance and bidirectional reflectance distribution function (BRDF) measurements of surfaces. The goniometer enables BRDF measurements to be made at nearly any combination of incident and scattering angles, without obstruction from frames or cradles that occur in traditional goniometers made of nested rotation stages. We present exploratory measurements of in-plane and hemispherically-scanned out-of-plane BRDF on a sintered white polytetrafluoroethylene (PTFE) sample using a supercontinuum fiber laser-based tunable light source operated at a wavelength of 550 nm, in order to demonstrate the capabilities of the system. An initial assessment of uncertainties is presented.

Paper Details

Date Published: 23 September 2013
PDF: 12 pages
Proc. SPIE 8866, Earth Observing Systems XVIII, 886615 (23 September 2013); doi: 10.1117/12.2023095
Show Author Affiliations
Heather J. Patrick, National Institute of Standards and Technology (United States)
Clarence J. Zarobila, National Institute of Standards and Technology (United States)
Jung Research and Development Corp. (United States)
Thomas A. Germer, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 8866:
Earth Observing Systems XVIII
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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