The Reflectance Of Ames 24E, Infrablack, And Martin Black

Sheldon M. Smith

doi:10.1117/12.948109

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5 April 1989 The Reflectance Of Ames 24E, Infrablack, And Martin Black

Sheldon M. Smith

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Proceedings Volume 0967, Stray Light and Contamination in Optical Systems; (1989) https://doi.org/10.1117/12.948109
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

Far-infrared measurements of the specular and diffuse (BRDF) reflectance of two relatively new IR-black coatings, Ames 24E and Martin Infrablack, are described and compared to previous data on an earlier coating, Martin Black. The specular reflectances of the new coatings are conservatively one (Infrablack) and two (Ames 24E) orders of magnitude less than that of Martin Black across the spectral region from 12μm to 500μm. The reduced reflectance of Infrablack is attributed to a large increase in the roughness of its sub-strate prior to anodization. The diffuse reflectance characteristics of the new coatings are strikingly different, both from each other and from Martin Black. Near normal inci-dence and at wavelengths as long as 200μm Martin Black is very specular; Infrablack is specular-diffuse with special features; and Ames 24E is nearly Lambertian. At 12 and 50μm, the BRDF of Infrablack is considerably less than that of Ames 24E, while at 100 and 200μm they are comparable.

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Sheldon M. Smith "The Reflectance Of Ames 24E, Infrablack, And Martin Black", Proc. SPIE 0967, Stray Light and Contamination in Optical Systems, (5 April 1989); https://doi.org/10.1117/12.948109

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