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Proceedings Paper

Mapping of absorption in optical coatings
Author(s): Steve E. Watkins; Robert Heimlich; Robert Reis
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Paper Abstract

Absorption characteristics of optical coatings have been observed using infrared photothermal radiometry as a noncontact diagnostic technique. The local laser-induced temperature rise was measured as a function of position on the coatings. The data was used to calculate the absorption of the coatings and to identify point sites with atypical absorption. The coating samples were tantala/silica multilayers designed to be high reflectors at 1.32 micrometers . The tests were done with a 1.32 micrometers , continuous-wave Nd:YAG laser and a HgCdTe infrared camera.

Paper Details

Date Published: 29 July 1992
PDF: 10 pages
Proc. SPIE 1624, Laser-Induced Damage in Optical Materials: 1991, (29 July 1992); doi: 10.1117/12.60110
Show Author Affiliations
Steve E. Watkins, Univ. of Missouri/Rolla (United States)
Robert Heimlich, Phillips Lab. (United States)
Robert Reis, Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 1624:
Laser-Induced Damage in Optical Materials: 1991
Harold E. Bennett; Lloyd L. Chase; Arthur H. Guenther; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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