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US 12,330,385 B2Granted
Cast lens
AssigneeHOYA Optical Labs of America, Inc.
InventorsHannah Vu, David Olund, Sarawuth Seewattanangkoon, Ladawan Chantharadet, Harjit Bhambra, Tim Reynolds, Robin Kezar, Jeff Brown, Richard Blacker
Life of this patent
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Abstract
An ophthalmic lens incorporating an optically functional wafer having improved adhesion to a polymerized polyurea-urethane bulk lens resin.
Claims17
A method of forming an ophthalmic lens comprising:
- obtaining an optically functional wafer;
- coating the optically functional wafer with an adhesion improving coating to form a coated optically functional wafer;
- positioning the coated optically functional wafer within a cavity of a lens mold assembly;
- introducing a mixture of an aliphatic diisocyanate component, a dual amine/hydroxyl component comprising an amino and a hydroxyl functional group in the same molecule and a hydroxyl-containing component or a mixture of said aliphatic diisocyanate component and said dual amine/hydroxyl component to form a polyurea-urethane lens resin into the cavity of the lens mold adjacent to the adhesion improving coating of the coated optically functional wafer;
- and
- polymerizing the polyurea-urethane lens resin within the cavity of the lens mold.
3 more elements
A method of forming an ophthalmic lens comprising:
- obtaining an optically functional wafer having a first side and a second side;
- coating said first side with an adhesion improving coating to form a coated first side and said second side with said adhesion improving coating to form a coated second side;
- positioning said optically functional wafer having said coated first side and said coated second side within a cavity of a lens mold assembly;
- adding a mixture of an aliphatic diisocyanate component, a dual amine/hydroxyl component comprising an amino and a hydroxyl functional group in the same molecule and a hydroxyl-containing component or a mixture of said aliphatic diisocyanate component and said dual amine/hydroxyl component to form a first and second layers of a polyurea-urethane lens resin onto said coated first side and said coated second side of said optically functional wafer;
- polymerizing said first layer of polyurea-urethane lens resin onto said coated first side and said second layer of the polyurea-urethane lens resin onto said coated second side of said optically functional wafer to form said ophthalmic lens;
- and
- removing said lens mold assembly from said ophthalmic lens.
4 more elements
A method for forming an ophthalmic lens comprising:
- obtaining an optically functional wafer having at least one protective layer;
- treating said optically functional wafer having said at least one protective layer with a wafer treatment comprising an aliphatic polycarbonate polyurethane dispersion or a polysiloxane to form a coated optically functional wafer having said at least one protective layer;
- positioning said coated optically functional wafer having said at least one protective layer within a casting mold gasket comprising a front glass mold, a gasket and a back glass mold;
- adding a mixture of an aliphatic diisocyanate component, a dual amine/hydroxyl component comprising an amino and a hydroxyl functional group in the same molecule and a hydroxyl-containing component or a mixture of said aliphatic diisocyanate component and said dual amine/hydroxyl component to form a polyurea-urethane lens resin into said casting mold gasket to further coat said coated optically functional wafer having said at least one protective layer;
- polymerizing said polyurea-urethane lens resin within said casting mold gasket;
- and
- removing said casting mold gasket from said ophthalmic lens.
4 more elements
Dependencies are inferred from the claim text.