Process for manufacturing an optical article with an added value film

Patent metadata

Field	Value
Publication number	US-12365155-B2
Application number	US-202017622103-A
Country	US
Kind code	B2
Filing date	Jun 23, 2020
Priority date	Jun 24, 2019
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

The disclosure relates to a process for manufacturing an optical article, including: providing an optical article manufactured by additive manufacturing, the optical article having a first main surface and a second main surface; providing at least one added value film including at least one added value layer; and attaching the at least one added value layer onto at least one of the two main surfaces of the optical article by laminating the at least one added value film onto the at least one main surface.

First claim

The invention claimed is:

1. Process for manufacturing a finished optical lens designed to fit a spectacles frame, comprising:
forming an optical article by additive manufacturing, the optical article being an optical lens designed to fit a spectacles frame and being made of an additive manufacturing material, wherein the optical article has a curved first main surface and a curved second main surface;
applying an outermost layer of material on the curved first main surface, wherein the outermost layer of material is made of the additive manufacturing material or a variation thereof;
partially curing the outermost layer of material;
providing an added value film comprising at least one added value layer;
attaching the at least one added value layer onto the curved first main surface of the optical article by laminating said added value film onto the partially cured outermost layer of material;
during or following the step of attaching the at least one added value layer, further curing the partially cured outermost layer of material, thereby forming a finished optical lens designed to fit a spectacles frame and having the at least one added value layer on the curved first main surface;
applying a second outermost layer of material on the curved second main surface of the optical article, wherein the second outermost layer of material is made of the additive manufacturing material or a variation thereof;
partially curing the second outermost layer of material;
providing a second added value film comprising at least one second added value layer;
attaching the at least one second added value layer onto the curved second main surface of the optical 1 article by laminating said second added value film onto the partially cured second outermost layer of material; and
during or following the step of attaching the at least one second added value layer, further curing the second partially cured outermost layer of material, thereby forming said finished optical lens further having the at least one second added value layer on the curved second main surface.

2. The process according to claim 1 , wherein the added value film comprises at least one of a hard coat or an antireflective.

3. The process according to claim 2 , further comprising, before the step of forming the optical article, applying a treatment on a support, and forming the optical article by additive manufacturing on said support.

4. The process according to claim 1 , wherein at least one bonding layer is formed on the added value film before the attaching step.

5. The process according to claim 1 , further comprising, before the step of forming the optical article, applying a treatment on a support, and forming the optical article by additive manufacturing on said support.

6. The process according to claim 1 , wherein the added value film comprises at least one added value layer and a carrier film, the at least one added value layer being provided on said carrier film.

7. The process according to claim 6 , wherein during the attaching step, the at least one added value layer is between the carrier film and the optical article.

8. The process according to claim 6 , wherein the carrier film remains attached onto the optical article after the attaching step.

9. The process according to claim 1 , wherein the additive manufacturing is carried out by means of the stereolithography manufacturing technic, known as SLA, or by means of the inkjet 3D printing technic, or by means of the fused deposition modelling also called fused filament fabrication.

Assignees

• Essilor Int

Inventors

• Arrouy Frédéric
• Keita Gabriel

Classifications

• B32B2305/74

  Partially cured · CPC title

• B32B2037/1253

  curable adhesive · CPC title

• B32B2551/00

  Optical elements · CPC title

• B29D11/00442

  Curing the lens material · CPC title

• B29D11/00403

  Producing compound lenses · CPC title