Essilor International

Essilor International (compagnie Generale D'optique)

Alexandre Gourraud

Loic Quere

Jean-Marc Padiou

Loïc Quere

Pascal Allione

Mathieu Feuillade

Olivier Roussel

Cedric Begon

Mathieu Meynen

Gilles Le Saux

Bruno Fermigier

Jérôme Moine

Eric Gacoin

Marius Peloux

Xavier Bultez

Cédric Begon

Vincent Roptin

Bernard Pons

Luis Ricardo Castro Martinez

Bruno Fauquier

Benoît Callier

Luis Ricardo Castro-Martinez

Cédric Gilbert

José De Barros

Pascal Le Bouillonnec

A method for manufacturing an optical lens by additive manufacturing, includes steps of: depositing a first layer having a first thickness; —depositing a second layer, having a second thickness, onto the first layer, the second layer forming a first asperity with the first layer; depositing a third layer having a third thickness; depositing a fourth layer having a fourth thickness onto the third layer, thereby forming an intermediate optical element, the fourth layer forming a second asperity with the third layer; and smoothing the first asperity and the second asperity on the intermediate optical element, thereby forming the optical lens. The second thickness and the fourth thickness are different. A corresponding intermediate optical element is also described.

Method for manufacturing an optical lens by additive manufacturing and corresponding intermediate optical element

An eyeglass device including a variable transmission ophthalmic lens, a method for driving the transmission of such lens, and a non-transitory computer-readable storage medium for implementing such method. The eyeglass device comprises a light sensor configured for measuring an amount of light in the environment of a wearer and a controlling circuit configured for receiving at least light data from said light sensor and for driving the transmission of said ophthalmic lens on the basis of said light data. The controlling circuit is configured for driving the transmission of said ophthalmic lens on the basis further of movement data, said movement data being derived from an estimation of a movement of the wearer's head.

Eyeglass device and method for driving a variable transmission ophthalmic lens

A method for manufacturing an ophthalmic lens using an additive manufacturing technology, based on an optical element and initial manufacturing data, the initial manufacturing data including data defining a complementary portion to deposit on the optical element to form the ophthalmic lens from the optical element, includes the steps of: positioning the optical element on a support; determining a positioning error between the position of the optical element and a reference position on the support using a measurement directed to the optical element; determining a deterioration on the optical element; calculating updated manufacturing data taking into account initial manufacturing data and the determined positioning error; and manufacturing the ophthalmic lens using the updated manufacturing data by the additive manufacturing technology by depositing the complementary portion on the optical element to form the ophthalmic lens from the optical element. A manufacturing system for manufacturing an ophthalmic lens is also described.

Method and manufacturing system for manufacturing an ophthalmic lens using an additive manufacturing technology

A method of determining at least one parameter of an ophthalmic lens () including a complementary optical element () obtained by additive manufacturing and configured to provide at least a part of the optical function of the ophthalmic lens, the determining method including a step of providing two characterizing surfaces simulating two opposite surfaces of a complementary optical element (), the distance between the two characterizing surfaces along a thickness axis (Z) defining the thickness of the complementary optical element; a step of optimizing the distance between the two characterizing surfaces () along the thickness axis (Z) so that the thickness of the complementary optical element reaches a thickness threshold while complying with the optical function of the ophthalmic lens (); and a step of determining at least one parameter of the ophthalmic lens () on the basis of the optimized distance.

Determining method for an ophthalmic lens with optimized thickness

A method of manufacturing an ophthalmic lens having at least one optical function includes: a step of additively manufacturing a complementary optical element by depositing a plurality of predetermined volume elements on a predetermined build support, the complementary optical element being configured to provide at least a part of the optical function of the ophthalmic lens, wherein the build support includes at least one added value or adhesive configured to provide to the ophthalmic lens at least one added function. An ophthalmic lens including a build support and a complementary optical element as well as an ophthalmic lens obtained by such a manufacturing method.

Method of additively manufacturing an ophthalmic lens with at least one added function

A method of manufacturing an ophthalmic lens, including: a step of providing a starting optical system () having a first optical function and a first main refractive index; a step of providing a transition layer () intended to be disposed between the starting optical system () and a complementary optical element () having a second main refractive index, the transition layer () aiming at reducing unwanted reflection caused by the mismatch between the first and the second main refractive index, the transition layer () having a transition optical function; and a step of additively manufacturing the complementary optical element () on the transition layer (), the complementary optical element () having a second optical function, the second optical function being predetermined as a function of the first optical function and of the transition optical function.

Method for additively manufacturing an opthalmic lens and opthalmic lens

Disclosed is a machining method by turning at least one surface of an ophthalmic lens, using a turning machine having at least one geometrical defect. The method includes a step (-) of determining a turning configuration for machining by turning the at least one surface of the ophthalmic lens, the turning configuration including turning parameters and machine defects parameters associated to the turning parameters.

Machining method by turning at least one surface of an ophthalmic lens, using a turning machine having at least one geometrical defect

A method for producing an ophthalmic lens, comprising an additive manufacturing step () for producing an intermediate optical element by depositing a plurality of elements of predefined volume of at least one material, said element comprising a target ophthalmic lens supplemented with at least one overthickness, and a flexible polishing manufacturing step () for producing said lens from said element by at least partially subtracting the overthickness so as to filter irregularities formed on said element during said additive manufacturing step; said additive manufacturing step comprising a step of defining a manufacturing setpoint for said element in which said overthickness is defined on the basis of predefined parameters of said flexible polishing step, i.e., a geometric characteristic representative of a spatial cutoff frequency and a geometric characteristic representative of a material removal capacity.

Method and system for producing an ophthalmic lens

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

A method for manufacturing an ophthalmic lens () having at least one optical function, includes the step of additively manufacturing () a complementary optical element () by depositing a plurality of predetermined volume elements () of a material having a predetermined refraction index on a predetermined manufacturing substrate (), the complementary optical element being configured such as to be assembled with an initial optical system (), the manufacturing step including the step of determining a manufacturing setting () from properties relating to the deformation of the complementary optical element, which deformation is caused by transferring the latter onto the initial optical system, and the step of determining a setting including the step of determining the deformation properties () of the complementary optical element from geometric properties of the manufacturing substrate and the initial optical system and from properties of the optical function to be provided to the ophthalmic lens.

Method for manufacturing an ophthalmic lens

A process for manufacturing an ophthalmic lens () having at least one optical function, includes: a step () of additively manufacturing the ophthalmic lens () by depositing a plurality of preset volume elements of at least one material having a preset refractive index in order to form a target geometric envelope; a step of determining an actual geometric envelope at least once during the implementation of the additive manufacturing step (); and a step of triggering a corrective action if there is in a zone a discrepancy larger than a preset threshold between the target geometric envelope and the actual geometric envelope.

Process and machine for manufacturing an ophthalmic lens

A process for manufacturing an ophthalmic lens having at least one optical function, includes the following steps: additively manufacturing () an intermediate optical element by depositing a plurality of preset volume elements of at least one material having a preset refractive index, the intermediate optical element including a target ophthalmic lens and a thickness allowance consisting of a portion of the plurality of volume elements; and subtractively manufacturing (), by machining, the target ophthalmic lens from the intermediate optical element, the machining being carried out in a preset sequence, of at least one step, the preset sequence making it possible to subtract the thickness allowance, the additive manufacturing step () including a step of determining a manufacturing setpoint for the intermediate optical element in which the thickness allowance is determined depending on the preset sequence defined in the subtractive manufacturing step ().

Process and system for manufacturing an ophthalmic lens

Methods of determining movement data representing the movement of a machining tool of an optical lens lathing device for machining one or more optical surfaces or parts thereof of a set of optical surfaces are described. The methods comprise a greatest radial slope amplitude determining step during which the greatest radial slope amplitude of the optical surfaces of the set of optical surfaces is determined. The methods also comprise a machining tool selecting step during which a machining tool having a window angle greater than or equal to the greatest radial slope amplitude of the optical surfaces of the set of surfaces to be manufactured is selected. The methods further comprise a movement data determining step during which movement data representing the movement of the selected machining tool are determined and synchronized with the angular position of the optical surface driven in rotation.

Method for machining a surface of an optical lens

A method of manufacturing an optical lens, the method comprising the steps of blocking a lens member at a first position on a blocker; determining the first position of the lens member with respect to the blocker; comparing the first position of the lens member with a predetermined position in order to determine a positioning error between the first position and the predetermined position; determining a surface position of the surface to be manufactured with respect to the blocker according to the positioning error; and configuring operational parameters of a lens manufacturing tool in order to manufacture a surface according to the determined surface position such that the desired optical properties of the optical lens are respected. The invention further relates to an apparatus for manufacturing an optical lens.

Method and an apparatus for manufacturing an optical lens

Method for determining movement data representing the movement of a machining tool of an optical lens 3D machining device for machining a surface of an optical lens, wherein the method comprises: a machining tool data providing stage, a surface data providing stage, a machining rule providing stage, a 3D surface determining stage in which the 3D surface corresponding to the surface consisting of all the positions of the reference point of the machining tool that allow the profile of the cutting edge of the machining tool to tangent the derivable surface of the optical lens is determined, a movement data determining stage.

Growing community of inventors

Charenton-le-Pont, France

Alexandre Gourraud