Patents by Inventor David Lewison

David Lewison 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: 7164470
    Abstract: An optical device inspection system and method employing a narrow aperture on a magnifying objective lens in order to reduce the circle of confusion and increase the depth of field. The smaller aperture resulting in an increase in depth of field allows for simultaneous focus for all portions of objects being inspected. An arc lamp with an elliptical reflector in combination with a condenser lens focuses a more intense beam of light through the objective lens, thereby providing sufficient brightness without sacrificing any depth of field.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: January 16, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Marc Bergendahl, David Lewison, Raymond H. Puffer, Jr.
  • Patent number: 7079239
    Abstract: A method and apparatus for an inspection cell that allows contact lenses to be presented in a known orientation to an operator or vision system for inspection. The cell can be tipped to allow the inspected lens to be placed into a known pick-cup location upon passing inspection, or if the lens does not pass inspection, it can be discarded. The placement or discarding of the lens can be readily automated by selecting the rate at which the cell is tipped.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: July 18, 2006
    Assignee: Bausch & Lomb Incorporated
    Inventors: Marc Bergendahl, David Lewison, Raymond H. Puffer, Jr.
  • Publication number: 20050078302
    Abstract: An optical device inspection system and method employing a narrow aperture on a magnifying objective lens in order to reduce the circle of confusion and increase the depth of field. The smaller aperture resulting in an increase in depth of field allows for simultaneous focus for all portions of objects being inspected. An arc lamp with an elliptical reflector in combination with a condenser lens focuses a more intense beam of light through the objective lens, thereby providing sufficient brightness without sacrificing any depth of field.
    Type: Application
    Filed: October 14, 2003
    Publication date: April 14, 2005
    Inventors: Marc Bergendahl, David Lewison, Raymond Puffer
  • Publication number: 20050073677
    Abstract: A method and apparatus for an inspection cell that allows contact lenses to be presented in a known orientation to an operator or vision system for inspection. The cell can be tipped to allow the inspected lens to be placed into a known pickup pick-cup location upon passing inspection, or if the lens does not pass inspection, it can be discarded. The placement or discarding of the lens can be readily automated by selecting the rate at which the cell is tipped.
    Type: Application
    Filed: October 7, 2003
    Publication date: April 7, 2005
    Inventors: Marc Bergendahl, David Lewison, Raymond Puffer
  • Patent number: 6729835
    Abstract: An assembly for orienting and fixturing an array of contact lenses in a lens-fixturing tray to enable automated picking of the lenses includes an array of tubes to which a first support tray having an array of lens receptacles each having a respective contact lens therein is removably mounted. A lens-fixturing tray having an array of lens receptacles is removably mounted to the other end of the tubes and the assembly is rotated and submerged in a fluid bath whereby the lenses release from the first support tray and float downwardly through a respective tube coming to rest in a centered, concave side-up position in a respective receptacle of the lens-fixturing tray.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: May 4, 2004
    Assignee: Bausch & Lomb Incorporated
    Inventors: William J. Appleton, Marc Bergendahl, Ted Foos, David Lewison, Raymond H. Puffer, Jr., Sunil Singh
  • Publication number: 20030185662
    Abstract: An assembly for orienting and fixturing an array of contact lenses in a lens-fixturing tray to enable automated picking of the lenses includes an array of tubes to which a first support tray having an array of lens receptacles each having a respective contact lens therein is removably mounted. A lens-fixturing tray having an array of lens receptacles is removably mounted to the other end of the tubes and the assembly is rotated and submerged in a fluid bath whereby the lenses release from the first support tray and float downwardly through a respective tube coming to rest in a centered, concave side-up position in a respective receptacle of the lens-fixturing tray.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 2, 2003
    Inventors: William J. Appleton, Marc Bergendahl, Ted Foos, David Lewison, Raymond H. Puffer, Sunil Singh