Title :
IR optical scattering instrument with out-of-plane and retro-reflection capabilities
Author :
Zen, Jinan ; Hanssen, Leonard
Author_Institution :
Div. of Opt. Technol., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
Abstract :
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 μm) 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.
Keywords :
light reflection; light scattering; mirrors; optical instruments; photodetectors; reflectivity; 785 to 10600 nm; BRDF measurement; IR optical scattering instrument; alignment techniques; concentric groove graphite mirror; gold mirror; out-of-plane capabilities; quadrant detector; reflectance; retroreflection capabilities; Detectors; Geometrical optics; Goniometers; Instruments; Laser beams; Lasers and electrooptics; NIST; Optical scattering; Optical sensors; Optical surface waves;
Conference_Titel :
Lasers and Electro-Optics, 2005. (CLEO). Conference on
Print_ISBN :
1-55752-795-4
DOI :
10.1109/CLEO.2005.202307
