Vapor deposition method for coating a spectacle lens, physical vapor deposition system and crucible for physical vapor deposition

• Main Author: Laukart, Artur
• Format: Patent
• Language: English
• Published: 09.01.2024
• Subjects: 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; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

A coating of spectacle lenses is applied by physical vapor deposition (PVD). A method for physical vapor deposition includes: providing a crucible containing a first evaporation material and a second evaporation material, wherein the first evaporation material has a first vapor pressure and the second evaporation material has a second vapor pressure different from the first vapor pressure. A ratio of an exposed surface of the first evaporation material and an exposed surface of the second evaporation material in the crucible is adapted to counterbalance the difference in vapor pressure between the first and the second evaporation material. Concurrent evaporation of the first evaporation material and the second evaporation material from the same crucible take place. The disclosure further relates to a crucible for physical vapor deposition and a physical vapor deposition system in particular for coating an optical surface such as a spectacle lens.