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1. (WO2018127543) METHOD FOR LAYER BY LAYER OPTIMIZATION OF A THIN FILM

Pub. No.:    WO/2018/127543    International Application No.:    PCT/EP2018/050221
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Fri Jan 05 00:59:59 CET 2018
IPC: C23C 14/54
G02B 1/115
G02C 7/02
Applicants: Essilor International
Inventors: THORNHILL, David
Title: METHOD FOR LAYER BY LAYER OPTIMIZATION OF A THIN FILM
Abstract:
Provided herein is a method of coating a substrate is provided. The method includes providing at least one test substrate, b) a programmed physical thickness (T) for at least one layer of the multi-layered coating, and c) a design file comprising a target physical thickness and target spectral performance for the at least one layer of the multi-layered coating; depositing the at least one layer onto the test substrate to form an applied layer having an optical thickness; measuring a spectral performance of the applied layer; and comparing the programmed physical thickness (T) to the optical thickness of the applied layer, thereby generating a data set (ΔΤ). A system and an optical article produced by the method described herein are also disclosed.