Opthalmic mold coatings
Assignee2C Optics, Inc.
InventorsYoung C. Bae, Thomas B. Ottoboni, Kwan Chan, Thai Minh Nguyen, Fredric J. Lim, David S. Soane
Life of this patent
Estimating the term…
Abstract
A method is provided for applying a coating to an ophthalmic device by applying a coating to a face of the mold used to make the device and partially curing the coating, or, if the viscosity is sufficiently high, leaving the coating uncured. Then the liquid used to form the lens is poured into the mold and the liquid and coating are concurrently cured.
Claims26
A method of providing an optically clear coating to at least one optical surface of an ophthalmic device comprising the steps of:
- applying a film of a composition comprising ethylenically unsaturated groups to at least a first face of a mold used to manufacture said ophthalmic device, wherein said face imparts a desired optical configuration to a first optical surface of said ophthalmic device;
- partially curing said composition to a degree that said film forms a tacky, wet non-abrasion-resistant film that is weakly adhered to said first face and is characterized by a degree of unsaturation of over 90% of the unsaturation it possessed prior to said reaction;
- filling the cavity of said mold with an organic liquid capable of hardening to a solid, stable state;
- and hardening said organic liquid and said film to form said ophthalmic device, to bond said film to the hardened organic material, to render said film abrasion resistant, and to adhere said film to said hardened organic material more firmly than said film adheres to said face of said mold.
A method of providing an optically clear coating to at least one optical surface of an ophthalmic device consisting of the steps of:
- applying a film of a composition comprising ethylenically unsaturated groups to at least a first face of a mold used to manufacture said ophthalmic device, wherein said face imparts a desired optical configuration to a first optical surface of said ophthalmic device;
- filling the cavity of said mold with an organic liquid capable of hardening to a solid, stable state;
- wherein said composition has a viscosity greater than said organic liquid;
- concurrently hardening said organic liquid and said film to form said ophthalmic device, to bond said film to the hardened organic material, to render said film abrasion resistant, and to adhere said film to said hardened organic material more firmly than said film adheres to said face of said mold.
Dependencies are inferred from the claim text.