Essilor International (compagnie Generale D'optique)

Other

David Freson

Frédéric Dubois

Eric Belloni

Cécile Pietri

Jean-François Cailloux

Jérémie Biton

Cyril Guilloux

Pascal Allione

Christian Joncour

Yohann Felten

Pauline Colas

Matthieu Le Gall

Benoit Holvoet Vermaut

Jean-Francois Cailloux

Thierry Allouis

Richard Kot

Pascal Thomas

Benoît Holvoet-Vermaut

A method of determining parameters for fitting an ophthalmic lens to a frame, including the following steps: providing an eyeglass frame including at least one temple portion having a bezel intended to enable the nesting of an ophthalmic lens; and determining the shape of the profile of the bezel at a point in the temple portion of said frame. Associated method of fabricating an ophthalmic lens.

Method of determining parameters for fitting an ophthalmic lens to a frame

A predictive calculation method for calculating the shape of a cross-section of an engagement ridge of an ophthalmic lens obtained by beveling the lens with a beveling grindwheel driven in accordance with an initial path setting. The method includes the following steps:

Predictive calculation method for calculating a simulated shape of an engagement ridge to be arranged on the edge face of an ophthalmic lens of a pair of eyeglasses, and a method of beveling

A method for modifying spectacle frame shape data, comprising the steps of: generating spectacle frame data by measuring the shape of a rim of a spectacle frame with a spectacle frame shape measuring apparatus, determining the principal axes of inertia of the measured shape of the rim of the spectacle frame using the rim spectacle frame data, and calculating new spectacle rim frame data expressed in the principal axes of inertia of the measured shape of the rim of the spectacle frame.

Method for modifying spectacle frame shape data

A method for blocking an optical lens () comprising a moving step in which the optical lens () is moved from a first reference position (P) to a second reference position (P), so as to be in contact with a blocking material (), the blocking material () being in a molding block (), the second reference position (P) being a function of the first reference position (P), wherein the method further comprises an orienting step in which the optical lens () is oriented in the first reference position (P) and placed on a plurality of pre-located pins () which are vertically translated into a preset position (Z, Z, Z), so that, when the optical lens () is placed on the plurality of pre-located pins (), the optical lens () is oriented in the first reference position (P) where the prism of the optical lens () corresponds to a desired prism (&#x3b1;, &#x3b2;, Z).

Lens blocking method and related device

A method of selecting a semi-finished ophthalmic lens according to a given spectacle frame comprising the steps of: providing the spectacle frame front face base data providing a list of semi-finished ophthalmic lenses with a plurality of front face bases, and selecting from the list of semi-finished ophthalmic lenses the semi-finished ophthalmic lens whose front base is the closest from the front base of the spectacle frame.

Method of selecting a semi-finished ophthalmic lens according to a given spectacle frame

A method of calculating a shaping setpoint for an ophthalmic lens along a longitudinal profile includes:

Method of calculating a setpoint for beveling or grooving an ophthalmic lens

A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame comprising the steps of: providing geometrical data of the spectacle frame, providing wearer data, and optimization of the optical system (OS) according to at least the criteria consisting of the geometrical data of the spectacle frame, the wearer data and at least one positioning data, so as to generate at least two optical surfaces (S, S).

Method of calculating an optical system according to a given spectacle frame

A method for generating a trimming setpoint for an ophthalmic lens to be fitted in a surround of a spectacle frame, includes:

Method for generating a trimming setpoint for an ophtalmic lens

A method for determining the shape of the bevel of an ophthalmic lens so as to have the ophthalmic lens fit a given spectacle frame, the method comprising the steps of: providing the three-dimensional (xi, yi, zi) internal profile of the groove of at least a rim of the spectacle frame expressed in the principal axes (Xf, Yf, Zf) of the spectacle frame and the length Pf of the periphery of the groove of the rim, providing the blocking point of the ophthalmic lens and the horizontal direction Xl of the ophthalmic lens, projecting the three-dimensional (xi, yi, zi) internal profile of the groove of the rim on the front face surface of the ophthalmic lens so as to obtain a three-dimension projected groove shape (xp, yp, zp), modifying the coordinates of each point of the two-dimensional groove shape (xp, yp) based on two correction coefficient, Rx for the coordinate xp and Ry for the coordinate yp, with Rx+Ry=1 so as to have the length Pp of the three-dimensional groove projected shape (xp, yp, zp) equal to the length Pf of the periphery of the internal profile of the groove of the rim.

Method for determining the shape of the bevel of an ophthalmic lens

A method for determining a contour data set of a spectacle frame rim comprising the steps of: a) providing a plurality (N) of three dimensional measured points along a contour of a spectacle frame rim; b) calculating a plurality of best torus that fits P points chosen among the N measured points and where P is equal or more than 4; c) selecting the (T) points among the N measured points that deviate from one of the best torus more than a threshold value; and d) forming the contour data set with (N-T) three dimensional measured points where the T selected points of step c) are excluded from the list of three dimensional measured points of step a).

Method for determining a contour data set of spectacle frame rim

A method for generating a trimming setpoint for an ophthalmic lens for it to be mounted in a surround of a spectacle frame, includes:

Method for generating a trimming setpoint for an ophthalmic lens

A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame comprising the steps of: providing geometrical data of the spectacle frame, providing deformability data of the spectacle frame, providing wearer data, providing a surface curvature of a front face of the ophthalmic lens, and optimization of both the optical system (OS) and the edging parameter according to the list of the optimization criteria consisting of the geometrical and deformability data of the spectacle frame and the wearer data, so as to generate at least one optical surface different from the front surface of the lens.

A method for generating a trimming setpoint for an ophthalmic lens for it to be fitted in a surround of a half-rim spectacle frame, includes the steps of:

Method for generating a trimming setpoint for an ophtalmic lens for it to be fitted in a half-rim spectacle frame

A method includes the following steps: a first shell () is immobilized in a first shell carrier (); a second shell () is immobilized in a second shell carrier (); the first shell carrier () is oriented in such a way that a useful moulding surface of the first shell () faces upwards and forms the base of a vessel; a pre-determined quantity of polymerizable material is placed in the vessel; the first shell carrier () and the second shell carrier () are moved into a pre-determined relative position wherein the first shell () and the second shell () are in a pre-determined moulding position, by at least partially arranging the second shell () in the vessel, at a distance from the edges thereof. The inventive device includes a structure for positioning the shell carriers.

Method and device for molding an optical lens, especially an ophthalmic lens

The inventive valve comprises a dosing chamber () connected to a dispenser () provided with input and output orifices () which are connected to said dosing chamber () when the dispenser () is in a position (), an injection orifice () being isolated. When the dispenser () is in a position (), the input and output orifices () are isolated from the dosing chamber () and from an injection orifice () which are connected to each other. In addition, said device comprises a source of polymerisable material which is provided with a container (), a continuous pump () and a control unit () for control elements () of the valve ().

Growing community of inventors

Charenton-le-Pont, France

David Freson