Method for manufacturing an ophthalmic lens to be mounted in a frame, ophthalmic lens, frame and eyeglasses equipment

Patent metadata

Field	Value
Publication number	US-11787136-B2
Application number	US-201917051497-A
Country	US
Kind code	B2
Filing date	May 7, 2019
Priority date	May 9, 2018
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

Disclosed is a method for manufacturing an ophthalmic lens to be mounted in a frame, the ophthalmic lens including an optical front face, an optical rear face, and a peripheral edge that surrounds the optical front and rear faces and that has a base portion carrying a fixing unit suitable for attaching the ophthalmic lens to at least a part of the frame, the method includes the steps of: determining a central part of the ophthalmic lens that includes at least one of the optical front face and the optical rear face; determining the peripheral edge with the fixing unit; calculating a planned manufactured device including both the fixing unit and the central part together; and manufacturing, using an additive manufacturing technology, the planned manufactured device in order to form the ophthalmic lens.

First claim

The invention claimed is:

1. A method for manufacturing an ophthalmic lens to be mounted in a frame, the ophthalmic lens including an optical front face, an optical rear face, and a peripheral edge that surrounds said optical front face and the optical rear face and that has a base portion carrying an attachment system configured to attach the ophthalmic lens to at least a part of the frame, the method comprising:
determining a central part of the ophthalmic lens that includes at least one of the optical front face and the optical rear face;
determining the peripheral edge with said attachment system;
calculating a planned manufactured device comprising both the attachment system and said central part together; and
manufacturing, using an additive manufacturing technology, said planned manufactured device to form the ophthalmic lens,
wherein the central part and the peripheral edge of the ophthalmic lens are manufactured using different materials.

2. The method according to claim 1 , wherein said attachment system comprises a strip in a groove shape or bevel shape that longitudinally extends along at least a part of the base portion of said peripheral edge, said strip comprising at least one overhang portion.

3. The method according to claim 2 , wherein said overhang portion has a cross-section along a plane which is perpendicular to the strip, said cross-section having a width that is greater in a first area situated further from the base portion of the peripheral edge than in a second area of thinner width situated between the first area and said base portion of the peripheral edge.

4. The method according to claim 1 , further comprising, after the manufacturing:
polishing at least a part of the front face or the rear face of the ophthalmic lens; and
polishing a part of the peripheral edge.

5. The method according to claim 1 , further comprising, after the manufacturing, a machining at least a part of one or more of the front face and the rear face of the ophthalmic lens.

6. The method according to claim 1 , wherein the manufacturing is performed by continuously or discontinuously juxtaposing layers or voxels of material.

7. An ophthalmic lens to be mounted in a frame, the ophthalmic lens comprising:
an optical front face;
an optical rear face; and
a peripheral edge that surrounds said optical front face and the optical rear face and that has a base portion carrying an attachment system configured to fix the ophthalmic lens to at least a part of the frame,
wherein the attachment system and a central part of the ophthalmic lens that includes at least one of the optical front face and the optical rear face are formed as one-piece using only an additive manufacturing technology, and
the central part and the peripheral edge of the ophthalmic lens are made of different materials.

8. The ophthalmic lens according to claim 7 , wherein said attachment system comprises a strip in a groove shape or a bevel shape that longitudinally extends along at least a part of the base portion of said peripheral edge, said strip comprising at least one overhang portion.

9. The ophthalmic lens according to claim 8 , wherein said overhang portion has a cross-section along a plane which is perpendicular to the strip, said cross-section having a width that is greater in a first area situated further from the base portion of the peripheral edge than in a second area of thinner width situated between the first area and said base portion of the peripheral edge.

10. The ophthalmic lens according to claim 8 , wherein the strip or a part of the strip has a dovetailed cross-section.

11. The ophthalmic lens according to claim 8 , wherein the overhang portion extends over the major part of the length of the strip.

12. The ophthalmic lens according to claim 8 , wherein the shape of the cross-section of the strip varies along the length of the strip.

13. The ophthalmic lens according to claim 7 , wherein said attachment system is manufactured with an asymmetrical shape.

14. The ophthalmic lens according to claim 7 , wherein the attachment system comprises a notch that has a projecting or recessed shape and that extends along only a minor part of the length of the peripheral edge.

15. The ophthalmic lens according to claim 14 , wherein the notch has a recessed shape and houses a fastener configured to lock the ophthalmic lens to the frame.

16. The ophthalmic lens according to claim 15 , wherein said fastener is a screw or a lug.

17. The ophthalmic lens according to claim 7 , wherein said attachment system comprises a strip in a groove shape or a bevel shape that comprises side faces, said side faces being tilted, the slope of at least one of said faces varying along the length of said peripheral edge.

18. The ophthalmic lens according to claim 7 , wherein said attachment system comprises a strip in a groove shape or a bevel shape that extends over a longitudinal trace, the distance of said longitudinal trace relative to said optical front face varying along the length of said peripheral edge.

19. The ophthalmic lens according to claim 7 , wherein said attachment system comprises a strip in a groove shape or a bevel shape that comprises at least a first part and a second part, the first part being groove-shaped and the second part being bevel-shaped.

20. Eyeglasses equipment comprising:
the ophthalmic lens according to claim 7 ; and
a frame comprising
a bridge;
temples; and
an attachment system configured to fix the ophthalmic lens, the attachment system comprising a relief pattern that has a projecting or recessed shape and that comprises at least one overhang portion.

21. The frame according to claim 20 , wherein said relief pattern has a dovetailed cross-section.

22. The frame according to claim 20 , further comprising a rim configured to surround at least a part of said ophthalmic lens,
wherein said relief pattern comprises a strip in a groove shape or a bevel shape that longitudinally extends along at least a part of the rim.

Assignees

• Essilor Int

Inventors

• Maurice Sébastien
• Baudart Thierry

Classifications

• B29D11/00009 Primary

  Production of simple or compound lenses · CPC title

• B29D11/00942

  where the lens material is mounted in a support for mounting onto a cutting device, e.g. a lathe, and where the support is of machinable material, e.g. plastics · CPC title

• G02C1/10 Primary

  Special mounting grooves in the rim or on the lens · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B29C59/02

  by mechanical means, e.g. pressing {(B29C59/007 takes precedence; embossing expanded porous articles B29C44/5627)} · CPC title