The NIST Robotic Optical Scatter Instrument (ROSI) and its Application to BRDF Measurements of Diffuse Reflectance Standards for Remote Sensing

Published

September 23, 2013

Author(s)

Heather J. Patrick, Clarence J. Zarobila, Thomas A. Germer

Abstract

We describe the robotic optical scatter instrument (ROSI), a new robotic arm-based goniometer for in-plane and out-of-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.

Proceedings Title

Earth Observing Systems XVIII

Volume

8866

Conference Dates

August 25-29, 2013

Conference Location

San Diego, CA

Conference Title

SPIE Optics and Photonics

Pub Type

Conferences

Download Paper

https://doi.org/10.1117/12.2023095

Keywords

BRDF, reflectance, robotics, bidirectional, diffuse, STARR, STARR II, ROSI

Citation

Patrick, H. , Zarobila, C. and Germer, T. (2013), The NIST Robotic Optical Scatter Instrument (ROSI) and its Application to BRDF Measurements of Diffuse Reflectance Standards for Remote Sensing, Earth Observing Systems XVIII, San Diego, CA, [online], https://doi.org/10.1117/12.2023095 (Accessed October 8, 2024)