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Optical Engineering

Ion Polishing as a Surface Preparation for Dielectric Coating Of Diamond-Turned Optics
Author(s): R. A. Hoffman; W. J. Lange; J. G. Gowan; C. J. Miglionico
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Paper Abstract

A technique to improve the adherence of multilayer dielectric coatings to diamond-turned copper mirror surfaces was developed. The method employs carefully controlled ion polishing, vacuum annealing, and in situ coating of the mirror substrates. It was found that ion polishing the substrates, with as little as 100 A removed, prior to coating improved the film adhe-sion significantly. All of the samples prepared in this manner passed all of the standard ASTM mechanical tests while control samples produced by conventional methods failed the tests. Additional coating evaluation such as reflectivity and laser damage threshold measurements at 10.6 pm, auger analysis for contaminants in the films and at interfaces, SEM characterization, and x-ray energy dispersive analysis are also discussed.

Paper Details

Date Published: 1 December 1978
PDF: 8 pages
Opt. Eng. 17(6) 176578 doi: 10.1117/12.7972287
Published in: Optical Engineering Volume 17, Issue 6
Show Author Affiliations
R. A. Hoffman, Westinghouse R&D Center (United States)
W. J. Lange, Westinghouse R&D Center (United States)
J. G. Gowan, Air Force Weapons Laboratory (United States)
C. J. Miglionico, Air Force Weapons Laboratory (United States)

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