# US 2019/0315080 A1 · Method for manufacturing an ophtalmic article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0315080 A1 - Document ID: US20190315080A1 - Status: Published application - Kind: A1 - Application number: 16/464,813 - Filed: 2017-10-27 - Published: 2019-10-17 - Earliest claimed: 2016-11-30 - Assignees: Essilor International - Applicants: Essilor International - Inventors: Céline LECHAT; Julien HUBERT - Web page: https://patentgrep.com/patent/US20190315080A1 ## CPC - B29D 11/00961: {using microprocessors or computers} - B29D 11/00009: {Production of simple or compound lenses} - B29D 11/0073: {Optical laminates} - B29D 11/00865: {Applying coatings; tinting; colouring (printing, marking or copying processes B41M; identification in general G09F3/00; producing decorative effects in general B44C; positioning or marking of lenses B24B13/0055)} - B29D 11/00942: {where the lens material is mounted in a support for mounting onto a cutting device, e.g. a lathe, and where the support is of machinable material, e.g. plastics} - B29L 2011/0016: {Lenses} - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract Disclosed is a method for manufacturing an ophthalmic article including a substrate and a functional wafer securely fastened to a first curved face of the substrate, the manufacturing method including the steps of providing the functional wafer preformed according to a first desired shape, the preformed functional wafer having a first preformed face intended to be applied on the first curved face of the substrate, the first preformed face being defined by first geometrical characteristics; determining second geometrical characteristics of the first curved face of the substrate to be manufactured according to the first geometrical characteristics of the first preformed face of the preformed functional wafer; manufacturing the first curved face according to the second geometrical characteristics determined; fixing the preformed functional wafer to the manufactured substrate by applying the first preformed face on the first curved face in order to form the ophthalmic lens. ## Claims ### Claim 1 Method for manufacturing an ophthalmic article (3) comprising a substrate (1) and a functional wafer (2) securely fastened to a first curved face (9) of said substrate, said manufacturing method comprising the steps of: providing (101) said functional wafer preformed according to a first desired shape, the preformed functional wafer having a first preformed face (7) intended to be applied on said first curved face of said substrate, said first preformed face being defined by first geometrical characteristics; determining (103) second geometrical characteristics of the first curved face of said substrate to be manufactured according to the first geometrical characteristics of said first preformed face of said preformed functional wafer; manufacturing (104) said first curved face according to the second geometrical characteristics determined; fixing (105) said preformed functional wafer to said manufactured substrate by applying the first preformed face on the first curved face in order to form said ophthalmic lens. ### Claim 2 (depends on 1) Method according to claim 1, comprising the step of determining (501) the first geometrical characteristics of said first preformed face. ### Claim 3 (depends on 2) Method according to claim 2, wherein determining said first geometrical characteristics is performed with a geometrical measurement device using for instance a three-dimensionals technology or a deflectometry technology. ### Claim 4 (depends on 3) Method according to claim 3, comprising the steps of measuring said first geometrical characteristics, comparing (502) said first geometrical characteristics to predetermined geometrical characteristics defining said first desired shape in order to determine a wafer geometry error between said first geometrical characteristics and said predetermined geometrical characteristics; and said second geometrical characteristics of the first curved face of said substrate to be manufactured are determined according to said wafer geometry error. ### Claim 5 (depends on 1) Method according to claim 1, comprising the step of generating (504) a manufacturing file from said second geometrical characteristics and configuring operational parameters for manufacturing said first curved face of said substrate. ### Claim 6 (depends on 5) Method according to claim 5, wherein manufacturing (506; 507) the first curved face of said substrate is performed by using a turning machine or an additive machine, the machine being configured to receive said operational parameters. ### Claim 7 (depends on 5) Method according to claim 5, wherein manufacturing (508) the first curved face of said substrate is performed by using a molding machine provided with a mold part (11) having an internal face (12) formed according to said second geometrical characteristics; the first curved face being formed in said mold part thanks to injection molding technology or casting technology or additive manufacturing technology. ### Claim 8 (depends on 1) Method according to claim 1, wherein said substrate (1) has a second curved face (17) opposite to the first curved face (9) and the method further comprises the steps of determining (206; 303) third geometrical characteristics of said second curved face according to the first geometrical characteristics of said first preformed face of said preformed functional wafer and/or to the second geometrical characteristics of said first curved face, and manufacturing (207; 304) said second curved face according to the third geometrical characteristics determined. ### Claim 9 (depends on 8) Method according to claim 8, comprising the step of providing (201; 301) a supplemental functional wafer preformed (14) according to a predetermined shape, the preformed supplemental functional wafer having a supplemental first preformed face intended to be applied on the second curved face (17) of said substrate (1), said supplemental first preformed face being defined by supplemental first geometrical characteristics, said second geometrical characteristics of said first curved face and/or said third geometrical characteristics of said second curved face being also determined according to said supplemental first geometrical characteristics; and the step of fixing (208; 305) said preformed supplemental functional wafer with said manufactured substrate by applying the supplemental first preformed face on the second curved face in order to form said ophthalmic lens. ### Claim 10 (depends on 1) Method according to claim 1, wherein at least one of said preformed functional wafer and manufactured substrate has an adhesive layer for fixing thereof. ### Claim 11 (depends on 1) Method according to claim 1, comprising the step of providing (403; 509) positioning marks on at least one of said preformed functional wafer and manufactured substrate and furthermore positioning said preformed functional wafer with respect to said manufactured substrate according to said positioning marks for fixing thereof. ### Claim 12 (depends on 1) Method according to claim 1, wherein the predetermined shape of said functional wafer is defined at least by a radius of curvature. ### Claim 13 (depends on 1) Method according to claim 1, comprising the step of preforming (402) said functional wafer by thermoforming and/or by applying a gradient of pressure. ### Claim 14 (depends on 1) A system comprising system parts configured for executing the steps of the method according to claim 1. ### Claim 15 (depends on 1) A non-transitory computer-readable medium on which is stored a program comprising instructions which, when executed by a computer, causes the computer to perform the steps of the method according to claim 1. ### Claim 16 (depends on 2) Method according to claim 2, comprising the step of generating (504) a manufacturing file from said second geometrical characteristics and configuring operational parameters for manufacturing said first curved face of said substrate. ### Claim 17 (depends on 3) Method according to claim 3, comprising the step of generating (504) a manufacturing file from said second geometrical characteristics and configuring operational parameters for manufacturing said first curved face of said substrate. ### Claim 18 (depends on 4) Method according to claim 4, comprising the step of generating (504) a manufacturing file from said second geometrical characteristics and configuring operational parameters for manufacturing said first curved face of said substrate. ### Claim 19 (depends on 2) Method according to claim 2, wherein said substrate (1) has a second curved face (17) opposite to the first curved face (9) and the method further comprises the steps of determining (206; 303) third geometrical characteristics of said second curved face according to the first geometrical characteristics of said first preformed face of said preformed functional wafer and/or to the second geometrical characteristics of said first curved face, and manufacturing (207; 304) said second curved face according to the third geometrical characteristics determined. ### Claim 20 (depends on 3) Method according to claim 3, wherein said substrate (1) has a second curved face (17) opposite to the first curved face (9) and the method further comprises the steps of determining (206; 303) third geometrical characteristics of said second curved face according to the first geometrical characteristics of said first preformed face of said preformed functional wafer and/or to the second geometrical characteristics of said first curved face, and manufacturing (207; 304) said second curved face according to the third geometrical characteristics determined.