ANTI-REFLECTIVE SPUTTERING STACK WITH LOW RV AND LOW RUV

The present invention provides a UV antireflective coating stack for ophthalmic lenses. The antireflective coating stack is deposited by sputtering, which lowers the reflectivity of the antireflective stack in the UV range and maintains low reflectivity in the visible range. The antireflective coati...

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Bibliographische Detailangaben
1. Verfasser:	BORGHARKAR, Narendra
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CONTACT LENSES DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	The present invention provides a UV antireflective coating stack for ophthalmic lenses. The antireflective coating stack is deposited by sputtering, which lowers the reflectivity of the antireflective stack in the UV range and maintains low reflectivity in the visible range. The antireflective coating stack offers improved thermo-mechanical performance as compared to evaporation-based UV antireflective stacks. La présente invention concerne un empilement de revêtement antireflet UV pour lentilles ophtalmiques. L'empilement de revêtement antireflet est déposé par pulvérisation cathodique, ce qui réduit la réflectivité de l'empilement antireflet dans la plage des UV et maintient une faible réflectivité dans la plage visible. L'empilement de revêtement antireflet améliore l'efficacité thermomécanique une comparativement aux empilements de revêtements antireflets UV obtenus par évaporation.