US 2019/0240938 A1 · 3D PRINTING PROCESS FOR PRODUCING A SPECTACLE LENS

Abstract

A process, in particular a 3D printing process, for producing a spectacle lens is disclosed. The process includes providing a coated substrate, providing a three-dimensional model of the spectacle lens, digitally cutting the three-dimensional model into individual two-dimensional layers, providing at least one printing ink, typically a 3D printing ink, building up the spectacle lens from the sum of the individual two-dimensional layers with a printing operation on the substrate, and hardening of the spectacle lens. The hardening can take place completely or partially after application of individual volume elements or after application of a layer, and the partial hardening can be completed after conclusion of the printing process.

Claims14

Dependent claims

A process for producing a spectacle lens comprising:

providing a coated substrate having at least one coating, wherein the at least one coating of the coated substrate is selected from the group consisting of a hard lacquer layer, an antireflection layer, an electrically conductive layer, a semiconductive layer, an antifog coating, or a clean-coat layer;
providing a three-dimensional model of the spectacle lens;
digitally cutting the three-dimensional model into individual two-dimensional slices;
providing at least one printing ink;
printing the individual two-dimensional slices onto the coated substrate to construct the spectacle lens as a sum total of the individual two-dimensional slices;
fully or partially curing the spectacle lens;
and
detaching the spectacle lens together with the coating from the coated substrate.

5 more elements

A spectacle lens produced with a printing method, wherein the printing method comprises:

providing a printable coated substrate;
providing a three-dimensional model of the spectacle lens;
digitally cutting the three-dimensional model into individual two-dimensional slices;
providing at least one printing ink containing at least one radiation-curable component in an amount from 31% by weight to 98.5% by weight, based on a total weight of the printing ink;
constructing the spectacle lens from a sum total of the individual two-dimensional slices with a printing operation on the substrate;
curing the spectacle lens, wherein the curing is effected fully or partially after each application of individual volume elements or after application of a slice of volume elements, and the partial curing is completed on completion of the printing process;
optionally, performing at least one of machining, grinding, turning, or polishing a surface of the spectacle lens that does not adjoin the substrate;
detaching the spectacle lens together with the coating from the substrate;
optionally, coating the surface of the spectacle lens remote from the substrate;
and
optionally, edging the spectacle lens.

8 more elements

Dependencies are inferred from the claim text.

3d printing process for producing a spectacle lens

Life of this patent

3d printing process for producing a spectacle lens

Life of this patent

Abstract

Claims14