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

Claim 0:
1. A spectacle lens comprising:
a substrate;
a photochromic layer arranged on the substrate;
a barrier layer, a chemically modified layer, or the barrier layer and the chemically modified layer, wherein the barrier layer and/or the chemically modified layer are arranged on a same side of the substrate as the photochromic layer and jointly form a first surface of the spectacle lens,
wherein the spectacle lens, in an event of damaging the spectacle lens by scratching the first surface of the spectacle lens with a scoring tool with a force of ≤65 mN, exhibits no swelling after complete contamination of the damaged first surface of the spectacle lens with a liquid, saturated or unsaturated, optionally substituted, monocarboxylic acid over a period of from 12 hours to 84 hours at room temperature,
wherein no swelling is defined as no structure of a size of ≥500 nm in z direction of the first surface of the spectacle lens is formed after the complete contamination, as seen with an optical profilometer based on white light interferometry, and
wherein
a) the photochromic layer,
b) at least one hardcoat layer 1,
c) at least one primer coat layer, and
d) at least one hardcoat layer 2,
are arranged on the substrate in a layer sequence, and
wherein the hardcoat layer 2 in the layer sequence is the layer furthest away from the substrate.