Patent ID: 11874534
Assignee: CARL ZEISS VISION INTERNATIONAL GMBH
Field: Optics (Instruments)
Classification: CPC G  B | IPC G

Claim 40:
41. A method of producing a spectacle lens comprising at least one substrate and at least one photochromic layer, wherein the method comprises the following steps:
a) providing at least one substrate to be coated,
b) coating at least one surface of the substrate to be coated with at least one photochromic layer,
c) covering the spectacle lens obtained in step b), on the same surface of the substrate as in step b), remotely from the substrate, with at least one acrylate-epoxy layer,
d) covering the spectacle lens obtained in step c), on the same surface of the substrate as in step c), remotely from the substrate, with at least one primer coat layer and
e) covering the spectacle lens obtained in step d), on the same surface of the substrate as in step d), remotely from the substrate, with at least one hardcoat layer,
wherein an average layer thickness of the at least one acrylate-epoxy layer after application and drying is within a range from 2.7 μm to 5.1 μm.