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Proceedings Paper

Far-Infrared Reflectance Spectra Of Optical Black Coatings
Author(s): Sheldon M. Smith
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Paper Abstract

Far-infrared specular reflectance spectra of six optically black coatings near normal incidence are presented. The spectra were obtained using nine bandpass transmission filters in the wavelength range between 12 and 300 μm. Data on the construction, thickness, and rms surface roughness of the coatings are also presented. The chemical composition of two coatings can be distinguished from that of the others by a strong absorption feature between 20 and 40 μm which is attributed to amorphous silicate material. Inverse relationships between these spectra and coating roughness and thickness are noted and lead to development of a reflecting-layer model for the measured reflectance. The model is applied to the spectra of several coatings whose construction falls within its constraints.

Paper Details

Date Published: 5 April 1983
PDF: 3 pages
Proc. SPIE 0362, Scattering in Optical Materials II, (5 April 1983); doi: 10.1117/12.934133
Show Author Affiliations
Sheldon M. Smith, NASA/Ames Research Center (United States)

Published in SPIE Proceedings Vol. 0362:
Scattering in Optical Materials II
Solomon Musikant, Editor(s)

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