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Optical Engineering

Infrared Absorption of Optical Blacks
Author(s): D. L. Stierwalt
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Paper Abstract

Most infrared (IR) optical systems use blackened surfaces to reduce stray light. This blackening may be in the form of paint, chemical blacks, deposited metal blacks, or anodization either dyed or undyed. One method of determining the optical absorption of these surfaces is by measuring their spectral emittance. We have made such measurements on a number of samples in the range from 3 to 22 micrometers and on a few samples as far as 125 micrometers. Since the absorption properties may be temperature dependent, we have made the measurements at or near the ex-pected operating temperatures of the samples. Data are presented on a number of samples at temperatures from 4.2 K to 373 K.

Paper Details

Date Published: 1 April 1979
PDF: 5 pages
Opt. Eng. 18(2) 182147 doi: 10.1117/12.7972340
Published in: Optical Engineering Volume 18, Issue 2
Show Author Affiliations
D. L. Stierwalt, Naval Ocean Systems Center (United States)

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