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Proceedings Paper

Protected silver coatings for low-scatter SiC and SiC/Si mirror surfaces
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Paper Abstract

Flat surfaces of reaction bonded SiC and aspheric surfaces of Si clad reaction bonded SiC were polished to yield rms surface roughnesses less than 30Å. These surfaces were then overcoated with two formulations of a typical front surface protected silver film and their reflectances and roughnesses compared with highly polished fused silica flat surfaces that were silver coated at the same time. Surface roughness and BRDF measurements performed before and after coating with protected silver indicated no significant increase in surface roughness or measured scatter for either silver coating formulation and a barely detectable measured roughness difference between the two coating formulations.

Paper Details

Date Published: 12 December 2003
PDF: 12 pages
Proc. SPIE 5179, Optical Materials and Structures Technologies, (12 December 2003); doi: 10.1117/12.507146
Show Author Affiliations
James B. Heaney, Swales Aerospace (United States)
Manuel A. Quijada, Swales Aerospace (United States)
Ian C. Stevenson, Denton Vacuum, Inc. (United States)
Ritva A. M. Keski-Kuha, NASA Goddard Space Flight Ctr. (United States)
Jay R. Schwartz, SSG Precision Optronics, Inc. (United States)
Joseph Robichaud, SSG Precision Optronics, Inc. (United States)

Published in SPIE Proceedings Vol. 5179:
Optical Materials and Structures Technologies
William A. Goodman, Editor(s)

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