Method of making high-reflection mirrors
AssigneeUnaxis Balzers Aktiengesellschaft
InventorsKarl Hohenegger, Peter Wierer, Christian Beyeler
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Abstract
An environmentally stable silver containing mirror having very high reflection values over a large spectral range comprises a silver containing layer disposed on a substrate, which is covered by a zinc sulfide layer. So that the sulfur being set free during the application or during the vaporization of the zinc sulfide to be applied, does not attack the silver, at least one barrier or intermediate layer is placed between the silver containing layer and the zinc sulfide layer.
Claims17
A method of making a high-reflection mirror or thin-film optical filter comprising:
- providing a substrate;
- applying to the substrate, at least one optically high-reflective silver containing layer forming a mirror or optical filter, the silver containing layer also containing copper;
- applying a barrier layer configuration on said at least one silver containing layer, the barrier layer configuration containing at least one layer;
- and
- applying a zinc sulfide layer on said barrier layer configuration;
- the at least one silver containing layer, the barrier layer configuration and the zinc sulfide layer being applied so that with a light angle of incidence of 45°, and across a light spectrum of 400 nm to 12,500 nm, the silver containing mirror or optical filter has a reflection value greater than 95%.
A method according to claim including providing approximately 20% copper in the silver containing layer.
Dependencies are inferred from the claim text.