Essilor International (compagnie Generale D'optique)

Essilor International

Essilor International Cie Generale D'optique

Christian Massart

Christian Joncour

Thierry Leroux

Cedric Lemaire

Cédric Lemaire

Sébastien Pinault

Aude Lapprand

Montserrat Burgos

Sebastien Pinault

Muriel Godeau

Gilles Massey

Jean-Claude Hennequin

Catherine Roussel

A method for cutting-out a multi-layer ophthalmic lens () following a desired contour (C), includes: a step of pre-blanking the ophthalmic lens () using a preliminary tool (), according to a preliminary contour (CC); a step of blanking the ophthalmic lens () using a blanking wheel (), following a blanking contour (CC); and a step of finishing the ophthalmic lens () using a finishing tool (). According to the invention, the preliminary contour (CC) is larger than the desired contour (C), and the blanking wheel () used has a granulometry of between 0.1 and 0.5 mm and is controlled in relation to the ophthalmic lens () so as to apply a radial force of between 0.1 and 5 N to the ophthalmic lens () during the blanking step.

Method for cutting-out a multi-layer ophthalmic lens

Apparatus for centering a spectacles lens and positioning a gripping

A method and device for transforming a video signal representing a video image into a signal representing an image for a display matrix useful in equipment for centering spectacle lenses are disclosed, the device comprising a unit supplying a video image of the lenses, a unit furnishing data for a spectacle frame, a microprocessor which generates an image of said frame and an alignment pattern for superimposition in the image of said lenses, and a flat panel display device.

Method for transforming a video image into an image suitable for a

An interpupillary distance measuring device comprises a box with a front panel whose position corresponds to an eyeglass frame. The device has a main axis perpendicular to the front panel and equidistant from the eyes of the subject. A horizon plane perpendicular to the plane of the face passes through the main axis and the eyes of the subject. In the box are a master lens and a point light source at the focus of the lens and on the main optical axis. The point source creates at the center of the eyes of the subject corneal reflections, virtual images of which are formed by the lens. These virtual images form real objects for an objective lens which forms a pair of real images on a measurement scale formed by one or more linear arrays of photosensitive charge transfer devices. The device scans sequentially to identify the elements of the arrays at which the images are formed by means of the rank of those elements.

Interpupillary distance measuring device with no moving parts

Growing community of inventors

Clichy-Sous-Bois, France

Christian Massart