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

Claim 11:
12. A physical vapor deposition system for coating an optical surface of a spectacle lens, the system comprising:
a vacuum chamber;
a crucible comprising 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 wherein 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 a difference in vapor pressure between the first and the second evaporation material; and
an evaporation unit configured to concurrently evaporate the first evaporation material and the second evaporation material from the same crucible.