US 12,416,819 B2
Optical lens
Eric Gacoin, Charenton-le-Pont (FR); Khamphone Sisavanh, Charenton-le-Pont (FR); and Jean Stephane, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/920,320
Filed by ESSILOR INTERNATIONAL, Charenton-le-Pont (FR)
PCT Filed Apr. 21, 2021, PCT No. PCT/EP2021/060375
§ 371(c)(1), (2) Date Oct. 20, 2022,
PCT Pub. No. WO2021/214133, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 20315202 (EP), filed on Apr. 21, 2020.
Prior Publication US 2023/0176400 A1, Jun. 8, 2023
Int. Cl. G02C 7/02 (2006.01); B24B 13/06 (2006.01); B29D 11/00 (2006.01)
CPC G02C 7/028 (2013.01) [B24B 13/06 (2013.01); B29D 11/00971 (2013.01); B29D 11/0098 (2013.01); G02C 7/022 (2013.01); G02C 2202/24 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method implemented by a computer to determine surfacing data to obtain a surface of a lens element, the surface of the lens element including a refraction area having a first curvature, and a plurality of optical elements disposed on at least part of the finished optical surface, each of the optical elements having at least a second curvature, the method comprising:
providing lens data indicating at least a shape of said surface of the lens element to obtain, said surface of the lens element comprising a surface of the refraction area and a surface of the optical elements disposed on the refraction area, the shape of said surface of the lens element being associated with a targeted optical function;
selecting a manufacturing method intended to be implemented to obtain said surface of the lens element, said selected manufacturing method comprising a surfacing process and introducing surface defects on said surface of the lens element that are reproducible and specific to the manufacturing method in a repeatable manner, the surface defects modificating the targeted optical function;
providing a transfer law associated with the selected manufacturing method, the transfer law corresponding to transformations to apply to the shape of the surface of the lens element to compensate the surface defects introduced by the selected manufacturing method such that the targeted optical function is obtained by the selected manufacturing method; and
determining the surfacing data to obtain the surface of the lens element associated with the targeted optical function, the determining the surfacing data being based on the lens data and the transfer law.