Hard multi-coat on optical article

• US 10,705,260 B2
• Filed: 12/16/2016
• Issued: 07/07/2020
• Est. Priority Date: 12/17/2015
• Status: Active Grant

• Current Assignee: Essilor International SA
• Original Assignee: Essilor International SA
• Inventors: Eagerton, William
• Primary Examiner(s): Kakalec, Kimberly N.
• Application Number:
  US16/062,780
• Publication Number:
  US 20190227196A1
• Time in Patent Office: 1,299 Days
• CPC Class Codes: B05D 1/18 performed by dipping
• CPC Class Codes: B05D 3/12 by mechanical means
• CPC Class Codes: C01B 32/158 Carbon nanotubes
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02C 1/00 Assemblies of lenses with bridges or browbars

Abstract

An optical device and method for manufacturing the optical device is provided. The optical device comprises an optical article having a substrate, a primer layer, and a hard multi-coat (HMC). The HMC comprises at least one layer. At least one of the layers, the substrate, and the HMC comprises at least one carbon allotrope that is absorbed by diffusion. The method of manufacturing involves combining and organic solvent and deionized water to form a solution, mixing into the solution at least one carbon allotrope, applying sonication to the solution an optical article comprising at least one of a substrate, a primer layer on the substrate, and a HMC, immersing and then withdrawing the optical article from the solution, withdrawing the optical article from the solution, and evaporating excess liquid from the solution.

Claims

1. An optical device comprising:

an optical article having a substrate, a primer layer on the substrate, and a hard multi-coat (HMC), wherein the HMC comprises at least one layer, and wherein at least one of the layers, the substrate, and the HMC comprises graphene nanoparticles, each nanoparticle being about 0.25 μ

m, absorbed by diffusion, and wherein the graphene nanoparticles are present as a uniform coating on a layer surface.

2. The optical device of claim 1, wherein the optical article is polarized.

3. A method of manufacturing an optical device of claim 1 comprising:

combining an organic solvent and deionized water to form a solution;

mixing into the solution the graphene nanoparticles, each nanoparticle being about 0.25 μ

m;

applying sonication to the solution;

immersing into the solution the optical article comprising at least one of a substrate, a primer layer on the substrate, and a hard multi-coat (HMC);

withdrawing the optical article from the solution; and

evaporating excess liquid from the optical article.

4. The method of claim 3, wherein the step of withdrawing further comprises withdrawing the optical article from the solution at a constant speed.

5. The method of claim 3, wherein the method further comprises:

during the step of withdrawing, diffusing the graphene nanoparticles into at least one of the substrate, the primer layer, and the HMC.

6. The method of claim 3, wherein the method further comprises during the step of withdrawing, coating at least one of an outer surface of at least one of the substrate, the primer layer, and the HMC with at least a first layer comprising graphene nanoparticles.

7. The method of claim 6, wherein the method further comprises coating the at least a first layer comprising graphene with a primer layer.

8. The method of claim 7, wherein the method further comprises:

immersing the optical article into the solution such that the optical article is positioned at a substantially 90 degree angle to a horizontal surface of the solution, and withdrawing the optical article from the solution such that at least a second layer comprising graphene nanoparticles is diffused into at least one of the substrate, the primer layer, and the HMC in a substantially perpendicular position relative to the first layer comprising graphene nanoparticles to form a polarized article.