IR optical scattering instrument with out-of-plane and retro-reflection capabilities

An infrared (IR) optical scattering instrument for BRDF measurement has been developed at NIST with out-of-plane and retro-reflection capabilities. In this paper, a description of the BRDF instrument, its use of multi-wavelength sources (785 nm-10.6 /spl mu/m) and a retro-reflection measurement capa...

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Bibliographic Details
Main Authors: Jinan Zeng, Hanssen, L.
Format: Conference Proceeding
Language:English
Subjects:
Detectors
Geometrical optics
Goniometers
Instruments
Laser beams
Lasers and electrooptics
NIST
Optical scattering
Optical sensors
Optical surface waves
Online Access:Request full text
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Summary:An infrared (IR) optical scattering instrument for BRDF measurement has been developed at NIST with out-of-plane and retro-reflection capabilities. In this paper, a description of the BRDF instrument, its use of multi-wavelength sources (785 nm-10.6 /spl mu/m) and a retro-reflection measurement capability, and alignment techniques using a quadrant detector are presented. The related alignment results for the in- and out-of-plane geometries and reflectance of a gold mirror versus incident angle are also reported. The results of BRDF measurements for a concentric groove graphite radiator in the retro-reflection configuration are demonstrated.
DOI:10.1109/CLEO.2005.202307