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1. (WO2016054126) MIRROR SUBSTRATES WITH HIGHLY FINISHABLE CORROSION-RESISTANT COATING

Pub. No.:    WO/2016/054126    International Application No.:    PCT/US2015/053071
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Thu Oct 01 01:59:59 CEST 2015
IPC: G02B 5/08
C23C 14/16
C23C 14/02
C23C 14/58
Applicants: CORNING INCORPORATED
Inventors: COMSTOCK, Lovell Elgin, II
CRIFASI, Joseph Charles
ROY, Brian Paul
WALTON, Robin Merchant
WAMBOLDT, Leonard Gerard
WOODARD, Kenneth Smith
Title: MIRROR SUBSTRATES WITH HIGHLY FINISHABLE CORROSION-RESISTANT COATING
Abstract:
The disclosure is directed to optical elements including a performance-enhancing coating on the surface of a metal or ceramic substrate and to methods for making the optical elements. The optical elements are suitable for use in harsh environments, including salt fog and high humidity environments. The performance-enhancing coating and substrate have similar thermal expansion properties and the performance-enhancing coating has a diamond-turned surface. The performance-enhancing coating may also be polished with a solution of colloidal silica in glycol to an RMS surface roughness less than 30.