Patent ID: 11866818
Assignee: CARL ZEISS VISION INTERNATIONAL GMBH
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B | IPC C

Claim 0:
1. A method of physical vapor deposition for coating an optical surface of a spectacle lens, the method comprising:
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; and
concurrent evaporation of the first evaporation material and the second evaporation material from a same crucible,
wherein a ratio of an exposed surface of the first evaporation material and an exposed surface of the second evaporation material at a surface of the crucible is adapted to counterbalance a difference in vapor pressure between the first and the second evaporation material.