Essilor International

Essilor International (compagnie Generale D'optique)

Eric Gacoin

Mathieu Meynen

Matthieu Guillot

Loic Quere

Jean Stephane

Jonathan Saulny

Luis Castro

Jean-Marc Padiou

Benoit Callier

Bruno Fermigier

Jérôme Moine

Carlos Rego

Marc Reignault

Chefik Habassi

Bernard Pons

Ludovic Jouard

Alexandre Gourraud

Yohann Felten

Xavier Bultez

Loïc Quere

Jeanne Marchal

Yu Liu

Cédric Lemaire

Vincent Roptin

Cédric Buchon

Antoine Videmann

Alain Batard

Yassine Fakhreddine

Helene Guillou

Laurent Huprel

Pierre Kress

Hélène Guillou

Marion Cornet

Jinhhao Ng

Khamphone Sisavanh

Thierry Devanneaux

Gérard Martin

Hasana Sadiki

Luis Ricardo Castro-Martinez

Gérard Gelly

Manuela De Sousa

Alexis Raposo

Jérome Moine

Benoît Callier

Muhammad Leman

José De Barros

Chéfik Habassi

Stephane Jean

Pascal Le Bouillonnec

A method for characterizing optical elements of a lens element adapted for a person is presented, the lens element including: a holder including a refraction area having a refractive power based on a prescription for correcting an abnormal refraction of an eye of the person; and a plurality of optical elements configured so that at least one of slow down, retard or prevent a progress of the abnormal refraction of the eye of the person. A two-dimensional representation of the local optical power of the lens element is obtained using a fringe deflectometry method and the images used for the fringe deflectometry method consist of pixels smaller than or equal to 0.05 mm×0.05 mm.

Characterizing an optical element

Disclosed is a method implemented by a computer for determining 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 multiple optical elements placed on at least part of the finished optical surface, each optical element having at least a second curvature.

Optical lens

The tool includes a base including a rigid carrier and a flexible collar encircling the rigid carrier; an elastically compressible interface; and a flexible buffer including a central portion that is located in line with the rigid carrier and a peripheral portion that is located transversely therebeyond. This peripheral portion is connected to the carrier exclusively via the interface and via the collar, wherein the collar is configured so that the tool is elastically deformable between a rest position that it adopts in the absence of stress and a reference position in which the transverse end second surface of the flexible buffer is pressed against a reference surface that is spherical and of radius included between 40 mm and 1500 mm.

Optical-grade surfacing tool

A lens element adapted for a person including a holder including a refraction area having a refractive power based on a prescription for correcting an abnormal refraction of the person, a plurality of optical elements placed on at least one surface of the holder to at least one of: slow down, retard, or prevent a progress of the abnormal refraction of an eye of the person, and at least one layer of at least one coating element covering at least a zone of at least one optical element and at least a zone of the holder on which the optical elements are placed, wherein said at least one layer of at least one coating element adds an optical power of 0.1 diopter in absolute value in specific wearing conditions when measured over said zone of the optical element covered by said at least one layer of at least one coating element.

An optical article provided in a form suitable for simultaneous lamination of a pressure sensitive adhesive layer and of a thermoplastic film, the said optical article comprising a convex and a concave optical surface, wherein the convex and/or the concave optical surface is a receiving surface intended to receive the pressure sensitive adhesive on which the thermoplastic film is intended to be arranged and wherein the said receiving surface has an arithmetic average profile roughness greater or equal to 0.01 &#x3bc;m and less or equal to 0.3 &#x3bc;m and/or wherein the said receiving surface has a profile roughness root mean square slope greater or equal to 0.2&#xb0; and less or equal to 1.2&#xb0;. A method for manufacturing an optical device using said optical article.

Optical article provided in a form suitable for direct lamination; method for manufacturing an optical device

An optical device for a wearer including an optical system with an active function configured to be mounted into a frame, a wafer comprising an internal face facing the optical system, the wafer being configured to be mounted into the frame, and holding means configured to maintain the optical system and the wafer in the frame without contact at least between a part of the optical system and the internal face of the wafer.

Optical device adapted for a wearer

An optical device adapted for a wearer includes an emitting system, a first wafer and a gap. The emitting system includes a halt conducting element configured to output a light through an exit face of the light conducting element towards an eye of the wearer. The first wafer includes an internal face facing the light conducting element. The gap is arranged between at least the exit face of the light conducting element and the wafer. The internal face of the wafer includes at least a curved surface facing the exit face and has a curvature greater than 0 D.

Disclosed is a method implemented by computer for determining a lens blank intended to be used for the manufacturing of a finished optical article. The method includes: &#x2014;a virtual volume data determining step, during which virtual volume data are determined based at least on finished optical article data representative of the volume of the finished optical article and over-thickness data representative of over-thickness requirements, the virtual volume data are determined so that the virtual volume defined by the virtual volume data includes the volume of the finished optical article volume of the finished optical article and the over-thickness, &#x2014;a lens blank determining step, during which a lens blank is determined based on the virtual volume data so as to include the virtual volume defined by the virtual volume data.

Method for determining a lens blank intended to be used to manufacture an optical lens

The invention relates to a mold () for manufacturing an ophthalmic lens or an ophthalmic lens blank called a puck (), equipped with an insert (), said mold comprising a first portion (A) intended to mold the front face of the ophthalmic lens or puck, a second portion (B) intended to mold the back face of the ophthalmic lens or puck and at least one third portion (C) intended to mold a peripheral lateral face of the ophthalmic lens or puck. According to the invention, said mold () comprises at least one recess (BBBB) for positioning the insert (), before and during the molding.

Mould and process for manufacturing an ophthalmic lens equipped with an insert

The invention relates to a process for manufacturing an ophthalmic lens equipped with an insert (), by means of a mold, comprising: &#x2014;a step of molding a puck () comprising two faces (A,B) and said insert () positioned between said faces; and &#x2014;a step of machining at least one of said faces (A,B) of said puck in order to form one of the front or back faces of said ophthalmic lens, the insert () being positioned relative to one portion of the mold before said molding step, According to the invention, an element associated with the insert or an imprint of this element left in the puck after the element has been removed comprises at least one of its portions providing a positional reference relative to said insert () in the machining step.

Process for manufacturing an ophthalmic lens equipped with an insert

A method for manufacturing an optical lens, includes the steps of providing a blank () which includes an upper surface and a lower surface () for forming first and second lens surfaces (), an edge surface () forming a first mechanical positioning reference point and a ramp portion () provided between the edge surface and the upper surface, which forms a second positioning reference point; providing a positioning ring () including a cavity defining an inner contour () concentric with the edge surface which forms a first complementary control reference point and a shoulder () forming a second complementary control reference point; fitting the blank into the cavity, the edge surface being in contact with the inner contour and the ramp portion being in contact with the shoulder; and locking the blank in position on a locking and supporting pin, the ring then being positioned there between.

Method for manufacturing optical lenses and assembly for manufacturing such lenses

A surfacing tool for optical purposes, includes a body () for mounting the tool () on a surfacing machine, an elastically compressible interface (), a flexible buff (), and a connecting structure between the mounting body () and the elastically compressible interface (). The connecting structure includes a bell (), and a supporting body () between the peripheral wall () of the bell () and the periphery of the interface (), the body () for mounting the tool () on a surfacing machine () being connected to the main body () on the side opposite the side facing the interface.

Surfacing tool for optical purposes

Method of taping an optical lens member () to be manufactured. An optical lens member providing step (S) is performed during which an optical lens member () is provided, the optical lens member has a first optical surface () associated with a first reference system and a second optical surface () to be manufactured, the first and second optical surfaces being connected by a external periphery surface (), the first reference system being identified by at least one referencing element () on the first optical surface and/or the external periphery surface of the optical lens member, a taping step (S) during which an adhesive tape () is provided on the first surface of the lens member so as to cover at least part of the first surface and leaving the referencing element uncovered.

Method for taping an optical lens member

The present invention relates to a method for transforming an initial progressive ophthalmic surface which has to be manufactured by a manufacturing method, the transformation method comprising: a step of selecting a manufacturing method intended to be implemented, in which said manufacturing method introduces a reproducible surface defect, a step of selecting a predictive model of said reproducible surface defect,

Method for transforming a progressive ophthalmic surface

Growing community of inventors

Charenton-le-Pont, France

Eric Gacoin