Patent ID: 7935212
Filing Date: 2011-05-03
Classification: B29D,G02C,Y10T

Abstract:
1. A process for transferring a coating or a stack of coatings borne by a removable carrier onto at least one geometrically defined surface of the substrate of an optical article, said carrier bearing an outermost coating having an exposed surface, comprising: a) obtaining a carrier having a main surface; b) depositing a layer of a curable composition onto the main surface of the carrier; c) obtaining an optical article comprising a substrate having at least one geometrically defined surface; d) depositing either onto the exposed surface of the outermost coating borne by the carrier or onto said at least one geometrically defined surface of the substrate a layer of a composition capable of allowing adhesion of said exposed surface to said at least one geometrically defined surface of the substrate; e) moving the carrier and the optical article relatively to each other to bring the deposited layer of composition capable of allowing adhesion into contact with either said at least one geometrically defined surface of the substrate or said exposed surface; f) pressing together the at least one geometrically defined surface of the substrate and the exposed surface of the outermost coating borne by the carrier, said layer of composition capable of allowing adhesion lying there between; g) optionally, heating or curing the layer of composition capable of allowing adhesion during pressing step f); h) stopping pressing step f); and i) withdrawing the removable carrier to recover an optical article having a substrate coated with at least one coating adhering to said at least one geometrically defined surface through the layer of composition allowing adhesion, wherein the layer which has been deposited at step b) is cured prior to step e) and subjected prior to step e) to a treatment step allowing to obtain a coating having at least one region which exhibits a refractive index profile, wherein said refractive index profile is obtained by: