Patent ID: 9726787
Date: 2017-08-08
CPC Classifications: G02B,Y10T

Claim:
1. A method for the manufacture of an optical article comprising: providing a substrate having two main faces and bearing —OH functions on at least one of its faces; and exposing successively at least one face of the substrate bearing —OH functions to at least two distinct materials M1 and M2, M1 having a weight average molecular weight higher than M2, in the order M1 followed by M2, in a vacuum chamber under conditions resulting in the deposit of those materials on the surface of the substrate, wherein: wherein the difference between the weight average molecular weight of M1 and the weight average molecular weight of M2 is higher than or equal to 600 g/mol, and the deposit of M1 and/or M2 is performed by evaporation under reduced pressure; and M1 and M2 are covalently grafted on the substrate's surface.