Method and apparatus for generating a surface of an optical lens

US9002491B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Pascal Allione · Charenton-le-Pont, FR
• Fabien Muradore · Charenton-le-Pont, FR
• Jordan Brouns · Charenton-le-Pont, FR

Key dates

• Filing date: Jun 29, 2010
• Grant date: Apr 7, 2015
• Expiry date: Mar 4, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/08
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method of generating a target surface {tilde over (S)}( λ) of an optical lens for the manufacture of the optical lens according to optical lens parameters λ, the method comprising: providing a set of L first surface difference data E(λj) each first surface difference data E(λj) corresponding to the surface difference between a pre-calculated surface Sλpc(αλ) (j=1, . . . , L) and an initial surface Sλini (j=1, . . . , L), from which the target surface will be generated, according to the expression:E(λj)=Sλpc(αλ)−Sλini (j=1, . . . , L)where λj (j=1, . . . , L) correspond to the optical lens parameters of the pre-calculated optical lenses; providing a set of second surface difference data {tilde over (E)}( λ) corresponding to the surface difference between the target optical surface {tilde over (S)}( λ) and the initial surface S ini by linear interpolation of the first surface difference data E(λj) according to the expression:where wj represents an interpolation coefficient; and; determining the target surface {tilde over (S)}( λ) by combining the second surface difference data {tilde over (E)}( λ) and the initial surface S ini according to the expression: {tilde over (S)}( λ)={til…