Essilor International (compagnie Generale D'optique)

Essilor International

Other

Mb Optique

Frédéric Dubois

David Freson

Sebastien Maurice

Eric Belloni

Cyril Guilloux

Christian Joncour

Laurent Marcepoil

Cécile Pietri

Pascal Allione

Jean-Pierre Chauveau

Luc Martin

Pauline Colas

Helene De Rossi

Sébastien Maurice

Melanie Tessieres

Guy Schott

Benoit Holvoet Vermaut

Jérémie Biton

Robert Pellegris

Michael Bray

Jerome Concialdi

Martin Luc

Richard Kot

Saurphéa Suy

Sébastien Chailley

Florence Legrand

Benoît Holvoet-Vermaut

Fabrice Gibrat

Vincent Roblot

Philippe Raulot

Jérôme Concialdi

A method for producing an ophthalmic lens includes a step of laser marking in order to produce permanent etchings on one surface of the lens, at least one predefined step subsequent to the marking step and implementing extreme thermal stress that is applied to the surface, and a step of determining an operating point (PF) of a laser marking machine () configured to implement the marking step from geometric characteristics (Di) of the etchings to be made, the determining step including the steps of determining () a value (CPM) representative of the deformation of the lens on at least one treatment area of the surface, from the stress and data relative to a predetermined material from which the lens is formed, and of deducing () the operating point from the value representative of deformation and from the geometric characteristics.

Command/control unit and computer program for producing an ophthalmic lens comprising a step of laser marking in order to produce permanent etchings on one surface of said ophthalmic lens

A device for marking an ophthalmic lens (), the lens () being made of at least one preset material, includes a laser () configured to produce permanent engravings on the lens () and configured to emit a focused beam of pulsed ultraviolet laser radiation that includes at least one radiation wavelength ranging between 200 nm and 300 nm, has a pulse length ranging between about 0.1 ns and about 5 ns, and has an energy per pulse ranging between about 5 &#x3bc;J and about 100 &#x3bc;J. A laser marking process configured to produce permanent engravings on an ophthalmic lens () via this device is also described.

Device and process for marking an ophthalmic lens with a pulsed laser of wavelength and energy selected per pulse

Method for producing an ophthalmic lens comprising a step of laser marking in order to produce permanent etchings on one surface of said ophthalmic lens

Method for providing a referencing element to an optical lens member. An optical lens member is provided which has a first optical surface, with a surface design associated with a first reference system, and a second optical surface to be manufactured. The first and second optical surfaces are connected by an external periphery surface. The first optical surface of the optical lens member is measured, and the first reference system is determined. The reference system is determined according to the shape and orientation of the first optical surface. A referencing element is added to the optical lens member, with the referencing element identifying the first reference system.

Method for providing a referencing element to an optical lens member

A system and method of generating machine marking instructions for marking an ophthalmic lens is disclosed. The method comprises the steps of receiving lens order data related to a lens order, receiving an initial marking layout and calculating, using the lens order data, ophthalmic lens data of an ophthalmic lens related to the lens order. The method also comprises the steps of determining, using the ophthalmic lens data, marking parameters relating to the ophthalmic lens, producing an additional marking layout by modifying the initial marking layout using the marking parameters and the lens order data, the additional marking layout representing the markings to be applied to the ophthalmic lens, and generating machine marking instructions arranged to cause a marking machine to mark the ophthalmic lens in accordance with the additional marking layout.

System and method for generating machine marking instructions

A method of processing an order request for an ophthalmic lens to be manufactured by a manufacturing device includes the following steps: receiving an order request including at least information related to an ophthalmic wearer's prescription by a first processing device; processing the order request by the first processing device on the basis of predetermined processing rules so as to obtain manufacturing parameters to be applied to the manufacturing device so as to manufacture the ophthalmic lens according to the information included in the order request; sending and storing the manufacturing parameters identified as requiring a further modification to a storing device and sending the other manufacturing parameters to the manufacturing device; modifying the stored manufacturing parameters by a second processing device and sending the modified manufacturing parameters to the manufacturing device.

Method of processing an order request for an ophthalmic lens

A system for the optical reading of markings printed on an ophthalmic lens (), includes an image capture device (), a light source () and a support () which are configured so that, when the lens is received by the support with a masking element () which covers the markings, the source illuminates the lens while rendering the markings visible to the device; and a mobile element on which the source is fixed and which admits a retracted position where it is distanced from the support and a working position where it surrounds at least partially the support and the source looks at the support and these latter are configured so that the source illuminates a rim () of the lens so that the light penetrates into its mass () and reaches the masking element () through the lens.

System and method for optical reading of markings printed on a face of an ophthalmic lens

A method of preparing an ophthalmic lens () to be fitted into a surround of a spectacle frame, includes: acquiring a longitudinal profile () of the surround; centering the longitudinal profile; acquiring the geometry of at least one part of an optical face of the ophthalmic lens; calculating a treatment setpoint for treating the ophthalmic lens; and treating the ophthalmic lens. The acquiring operation includes a step of calculating the bidimensional coordinates of a plurality of measurement points (P'i, P&#x2033;i) situated along two distinct longitudinal strands () which are chosen in such a way that they define between them a band which extends along the longitudinal profile, and a step of examining the ophthalmic lens to acquire the tridimensional coordinates for the measurement points with a view to calculating the treatment setpoint.

Method of preparing an ophthalmic lens

The present disclosure provides systems and methods for determining an ophthalmic lens. In one implementation, three-dimensional coordinates of a center of rotation of the wearer's eye measured on the wearer in binocular vision are received. At least one direction of gaze measured in a natural posture and a determined position of the ophthalmic lens are received. Characteristics of the ophthalmic lens are calculated by using the coordinates measured for the center of rotation of the eye, the determined position of the lens, and the at least one direction of gaze measured in a natural posture. The characteristics of the ophthalmic lens are calculated by positioning a starting ophthalmic lens in the determined position and modifying the starting ophthalmic lens by wavefront analysis and/or optimizing using ray tracing dependent on the coordinates measured for the center of rotation of the eye and the determined position of the lens.

Method of determining an ophthalmic lens

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 and a computer system and its components for providing spectacles adapted to a future wearer. The method comprises the steps of: inputting in a computer system a first set of data (F) related to the wearer, comprising at least a prescription of the wearer, inputting in the computer system a second set of data (F) related to a spectacle frame chosen by the wearer. The computer system is provided with processing means for outputting, on the basis of the first and second sets of data, at least one set of data (S, S, . . . , SN) characterizing a pair of ophthalmic lenses adapted to the wearer and the chosen frame.

Method and computer means for choosing spectacle lenses adapted to a frame

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 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.

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Charenton-le-Pont, France

Frédéric Dubois