Patents by Inventor Christian Massart

Christian Massart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9475166
    Abstract: A method for cutting-out a multi-layer ophthalmic lens (100) following a desired contour (C3), includes: a step of pre-blanking the ophthalmic lens (100) using a preliminary tool (210; 223), according to a preliminary contour (C1, C1?); a step of blanking the ophthalmic lens (100) using a blanking wheel (210), following a blanking contour (C2, C3); and a step of finishing the ophthalmic lens (100) using a finishing tool (212). According to the invention, the preliminary contour (C1, C1?) is larger than the desired contour (C3), and the blanking wheel (210) used has a granulometry of between 0.1 and 0.5 mm and is controlled in relation to the ophthalmic lens (100) so as to apply a radial force of between 0.1 and 5 N to the ophthalmic lens (100) during the blanking step.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: October 25, 2016
    Assignee: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
    Inventors: Muriel Godeau, Aude Lapprand, Cedric Lemaire, Christian Massart, Gilles Massey, Sebastien Pinault, Catherine Roussel, Montserrat Burgos
  • Publication number: 20150140905
    Abstract: A method for cutting-out a multi-layer ophthalmic lens (100) following a desired contour (C3), includes: a step of pre-blanking the ophthalmic lens (100) using a preliminary tool (210; 223), according to a preliminary contour (C1, C1?); a step of blanking the ophthalmic lens (100) using a blanking wheel (210), following a blanking contour (C2, C3); and a step of finishing the ophthalmic lens (100) using a finishing tool (212). According to the invention, the preliminary contour (C1, C1?) is larger than the desired contour (C3), and the blanking wheel (210) used has a granulometry of between 0.1 and 0.5 mm and is controlled in relation to the ophthalmic lens (100) so as to apply a radial force of between 0.1 and 5 N to the ophthalmic lens (100) during the blanking step.
    Type: Application
    Filed: May 3, 2013
    Publication date: May 21, 2015
    Applicant: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
    Inventors: Muriel Godeau, Aude Lapprand, Cedric Lemaire, Christian Massart, Gilles Massey, Sebastien Pinault, Catherine Roussel, Montserrat Burgos
  • Patent number: 5946074
    Abstract: An apparatus comprising a plate for receiving a spectacles lens to be fitted in one of the rims of a spectacles frame selected by a patient, a positioning device arranged above the plate for positioning a gripping member on the spectacles lens, and a screen for displaying an image of the rim in which the lens is to be fitted. The apparatus is combined with imaging means so that the image is imported from the patient wearing the appropriate spectacle frame.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: August 31, 1999
    Assignee: Essilor International Compagnie Generale d'Optique
    Inventors: Christian Joncour, Christian Massart
  • Patent number: 5598223
    Abstract: 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.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: January 28, 1997
    Assignee: Essilor International
    Inventors: Thierry Leroux, Christian Massart
  • Patent number: 5033840
    Abstract: 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.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: July 23, 1991
    Assignee: Essilor International, Cie Generale d'Optique
    Inventors: Jean-Claude Hennequin, Christian Massart