公开(公告)号：US11347078B2

公开(公告)日：2022-05-31

申请号：US16318249

申请日：2017-07-18

Applicant: ESSILOR INTERNATIONAL

Inventor： Sébastien Maurice ,  Gerhard Keller ,  Michèle Thomas

IPC: G02C7/02 ,  G02C7/10 ,  G02B5/26 ,  B24B13/005 ,  B23K26/50 ,  B23K26/0622 ,  B23K26/06 ,  G02B1/115 ,  G02B1/111 ,  G02B1/118 ,  B23K26/382

Abstract: Disclosed is a method for marking an optical article coated with an interference coating including at least two layers, an inner layer and an outer layer, and having reflection coefficient Re; by exposure of the inner layer, at a marking point, by way of a laser beam at a marking wavelength, in such a way as to ablate the inner layer and any layer further away from the substrate; the ablated area having a reflection coefficient Rm different from Re by at least 1%; the inner layer absorbing the marking wavelength to a greater degree than any layer further away from the substrate. Also disclosed is an optical article coated with an interference coating having at least two layers, an inner layer and an outer layer, the article including a marking pattern formed by local absence of layers.