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Proceedings Paper

Absorbing Coatings For The Far Infrared
Author(s): J. R Grammer; L J. Bailin; M D Blue; S Perkowitz
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Paper Abstract

Far-infrared optical sensors operating in the submillimeter wavelength region require baffle systems to suppress stray light. Because a high degree of rejection of the stray light is required, the baffle systems must use highly absorbent coatings. Most common optical baffle coatings are not functional at wavelengths greater than 100 μm. However, multilayer coatings have been developed that minimize front surface reflectance and maximize absorptance with a minimum required coating thickness. Data for a polyurethane binder and carbon-pigmented coating show that a multilayer coating with a thickness of approximately 5 mils has a reflectance of less than 10 percent over the wavelengths out to 300 μm.

Paper Details

Date Published: 3 March 1981
PDF: 4 pages
Proc. SPIE 0257, Radiation Scattering in Optical Systems, (3 March 1981); doi: 10.1117/12.959616
Show Author Affiliations
J. R Grammer, Lockheed Missiles & Space Company (United States)
L J. Bailin, Lockheed Missiles & Space Company (United States)
M D Blue, Georgia Institute of Technology (United States)
S Perkowitz, Emory University (United States)


Published in SPIE Proceedings Vol. 0257:
Radiation Scattering in Optical Systems
Gary H. Hunt, Editor(s)

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