Ophthalmic lens, method of manufacturing thereof, and eyewear comprising the ophthalmic lens

Patent metadata

Field	Value
Publication number	US-12474595-B2
Application number	US-202017761875-A
Country	US
Kind code	B2
Filing date	Sep 18, 2020
Priority date	Sep 19, 2019
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

An ophthalmic lens is provided. The ophthalmic lens includes a first optical surface, an opposing second optical surface and an edge surface connecting the first optical surface and the second optical surface, wherein the edge surface is planar. The ophthalmic lens further includes a first layer disposed on the edge surface, wherein the first layer includes a coating material effective to reduce a reflection caused by a profile of the edge surface, and wherein (a) the first layer defines a structural element for fastening the ophthalmic lens to an eyewear frame, or (b) the ophthalmic lens further includes a second layer disposed on the first layer, wherein the second layer defines a structural element for fastening the ophthalmic lens to an eyewear frame. A method of manufacturing the ophthalmic lens and an eyewear including the ophthalmic lens are also provided.

First claim

What is claimed is:

1 . An ophthalmic lens comprising:
a first optical surface; an opposing second optical surface; an edge surface connecting the first optical surface and the second optical surface, the edge surface being planar; and a first layer disposed on the edge surface, the first layer comprising a coating material configured to reduce a reflection caused by a profile of the edge surface to one or more of reduce and suppress one or more of a white ring and a myopia ring, said coating material forming the first layer, wherein one of: (a) the first layer defines a structural element configured to fasten the ophthalmic lens to an eyewear frame, and (b) the ophthalmic lens further comprises a second layer disposed on the first layer, the second layer defining a structural element configured to fasten the ophthalmic lens to an eyewear frame, wherein the coating material configured to reduce the reflection caused by the profile of the edge surface comprises an opacity agent dispersed in a matrix material, and wherein, when the second layer is present, the second layer is formed of a material selected from the group consisting of an epoxy, a polyester, a polyurethane, acrylonitrile butadiene styrene, an acrylate, cellulose acetate butyrate, a copolymer thereof, and a combination thereof.

2 . The ophthalmic lens according to claim 1 , wherein the edge surface is flat.

3 . The ophthalmic lens according to claim 1 , wherein the matrix material comprises a material selected from the group consisting of a polyurethane, an epoxy, an acrylate, cellulose acetate butyrate, silicone, a polyester, a copolymer thereof, and a combination thereof.

4 . The ophthalmic lens according to claim 1 , wherein the opacity agent comprises a material selected from the group consisting of carbon black, an organic pigment, an inorganic pigment, titanium dioxide, calcium oxide, beryllium oxide, cerium oxide, barium sulphate, carbon nanotube, and a combination thereof.

5 . The ophthalmic lens according to claim 1 , wherein, when the second layer is present, the material of the second layer different from the first layer.

6 . The ophthalmic lens according to claim 1 , wherein the coating material configured to reduce the reflection caused by the profile of the edge surface is configured to reduce a transmission of light through the edge surface.

7 . A method of manufacturing an ophthalmic lens, the method comprising:
providing the ophthalmic lens comprising
a first optical surface,
an opposing second optical surface, and
an edge surface connecting the first optical surface and the second optical surface, the edge surface being planar; and
forming a first layer on the edge surface of the ophthalmic lens, said first layer comprising a coating material configured to reduce a reflection caused by a profile of the edge surface, on the edge surface of the ophthalmic lens to one or more of reduce and suppress one or more of a white ring and a myopia ring, said coating material forming the first layer, wherein one of: (a) the first layer defines a structural element configured to fasten the ophthalmic lens to an eyewear frame, and (b) the method further comprises forming a second layer on the first layer, the second layer defining a structural element configured to fasten the ophthalmic lens to an eyewear frame, wherein the coating material configured to reduce the reflection caused by the profile of the edge surface comprises an opacity agent dispersed in a matrix material, and wherein, when the second layer is present, the second layer is formed of a material selected from the group consisting of an epoxy, a polyester, a polyurethane, acrylonitrile butadiene styrene, an acrylate, cellulose acetate butyrate, a copolymer thereof, and a combination thereof.

8 . The method according to claim 7 , wherein the forming the first layer comprises one of:
(a) disposing the coating material configured to reduce the reflection caused by the profile of the edge surface, surface of the ophthalmic lens, and shaping the disposed coating material to define the structural element configured to fasten the ophthalmic lens to the eyewear frame, (b) disposing the coating material configured to reduce the reflection caused by the profile of the edge surface, on the edge surface of the ophthalmic lens to shape the material disposed to define the structural element for fastening the ophthalmic lens to an eyewear frame, (c) providing a preshaped structural element to fasten the ophthalmic lens to the eyewear frame, the preshaped structural element comprises the coating material configured to reduce the reflection caused by the profile of the edge surface, and disposing the preshaped structural element on the edge surface of the ophthalmic lens.

9 . The method according to claim 8 , wherein the disposing the preshaped structural element further comprises applying an adhesive to one or both of the preshaped structural element and the edge surface of the ophthalmic lens to attach the preshaped structural element to the edge surface of the ophthalmic lens.

10 . The method according to claim 7 , wherein the forming the second layer comprises one of:
(a) disposing a substance configured to form e second layer on the first layer, and shaping the disposed substance to define the structural element configured to fasten the ophthalmic lens to the eyewear frame, (b) disposing a substance configured to form the second layer on the first layer to shape the disposed substance to define the structural element configured to fasten the ophthalmic lens to the eyewear frame, and (c) providing a preshaped structural element configured to fasten the ophthalmic lens to the eyewear frame, the preshaped structural element comprising a substance configured to form the second layer, and disposing the preshaped structural element on the first layer.

11 . The method according to claim 10 , wherein the disposing the preshaped structural element comprises applying an adhesive to one or both the preshaped structural element and the first layer to attach the preshaped structural element to the first layer.

12 . The method according to claim 7 , wherein, when the second layer is present, the material of the second layer different from the first layer.

13 . An eyewear comprising:
an eyewear frame; and the ophthalmic lens according to claim 1 .

14 . The ophthalmic lens according to claim 3 , wherein the opacity agent comprises a material selected from the group consisting of carbon black, an organic pigment, an inorganic pigment, titanium dioxide, calcium oxide, beryllium oxide, cerium oxide, barium sulphate, carbon nanotube, and a combination thereof.

Assignees

• Essilor Int

Inventors

• Bhangale Sunil
• Fitzgerald Kevin
• Ang Ker Chin

Classifications

• B29D11/00432

  Auxiliary operations, e.g. machines for filling the moulds (B29D11/00125 takes precedence) · CPC title

• B29D11/00923

  on lens surfaces for colouring or tinting (printing or marking in general B41M) · CPC title

• G02C7/00 Primary

  Optical parts (characterised by the material G02B1/00) · CPC title

• G02B27/0018

  with means for preventing ghost images (anti-reflection coatings G02B1/11) · CPC title

• G02B1/10

  Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) · CPC title