Patents by Inventor Jean-Daniel Bernhard

Jean-Daniel Bernhard 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).

  • Cold antireflection layer deposition process
    Patent number: 7175878
    Abstract: The invention concerns a method for making an antiglare stack by vacuum evaporation on an organic substrate (1) at a temperature lower than 150° C., comprising steps which consist in depositing at least a layer of material having a refractive index different from that of MgF2 (4, 4?), preparing the surface of the thus coated substrate, and depositing an outer MgF2 layer (5) without ionic assistance. The resulting antiglare stack on organic substrate exhibits good adherence and good scratch resistance. The invention is applicable to ophthalmic lenses.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: February 13, 2007
    Assignee: Essilor International
    Inventors: Yvon Helmstetter, Jean-Daniel Bernhard, Frederic Arrouy
  • Method for cold process deposition of an antiglare layer
    Publication number: 20040067351
    Abstract: The invention concerns a method for making an antiglare stack by vacuum evaporation on an organic substrate (1) at a temperature lower than 150° C., comprising steps which consist in depositing at least a layer of material having a refractive index different from that of MgF2 (4, 4′), preparing the surface of the thus coated substrate, and depositing an outer MgF2 layer (5) without ionic assistance. The resulting antiglare stack on organic substrate exhibits good adherence and good scratch resistance. The invention is applicable to ophthalmic lenses.
    Type: Application
    Filed: December 3, 2003
    Publication date: April 8, 2004
    Inventors: Yvon Helmstetter, Jean-Daniel Bernhard, Frederic Arrouy