Patents by Inventor Yvon Helmstetter

Yvon Helmstetter 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).

  • Optical article covered with a visible-absorbing, multi-layer anti-reflective coating, and production method thereof
    Patent number: 7736742
    Abstract: The invention relates to an optical article comprising a transparent substrate made of organic or inorganic glass, with main front and rear faces, at least one of said main faces comprising a multi-layer anti-reflection coating, wherein said anti-reflection coating comprises at least two visible-absorbing layers comprising a sub-stoichiometric titanium oxide, the visible-absorbing layers being such that the relative transmission factor of visible light Tv is reduced by at least 10% compared with the same article not comprising said visible-absorbing layers.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: June 15, 2010
    Assignee: Essilor International Compagnie Generale d'Optique
    Inventors: Michele Thomas, Alain Arnal, Yvon Helmstetter
  • Optical article covered with a visible-absorbing, multi-layer anti-reflective coating, and production method thereof
    Publication number: 20070178315
    Abstract: The invention relates to an optical article comprising a transparent substrate which is made from organic or mineral glass and which has front and rear main faces, at least one of said faces being equipped with a multi-layer anti-reflective coating. The invention is characterised in that the anti-reflective coating consists of at least two layers which absorb in the visible region and which comprise a substoichiometric titanium oxide, said visible-absorbing layers being such that the visible light transmission factor Tv is reduced by more than 10% in relation to the same article without the visible-absorbing layers.
    Type: Application
    Filed: December 16, 2004
    Publication date: August 2, 2007
    Applicant: ESSILOR INTERNATIONAL COMPAGNIE GENERALE D'OPTIQUE
    Inventors: Michele Thomas, Alain Arnal, Yvon Helmstetter
  • 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
  • Thin film polarization splitter, its manufacture and ophthalmic lens with projection inserts containing it
    Patent number: 6891673
    Abstract: This invention features a thin film polarization splitter, its manufacture and ophthalmic lens with projection inserts containing it.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: May 10, 2005
    Assignee: Essilor International
    Inventors: Herve Cado, Frederic Arrouy, Yvon Helmstetter
  • 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
  • Thin film polarization splitter, its manufacture and ophthalmic lens with projection inserts containing it
    Publication number: 20030223114
    Abstract: This invention features a thin film polarization splitter, its manufacture and ophthalmic lens with projection inserts containing it.
    Type: Application
    Filed: April 9, 2003
    Publication date: December 4, 2003
    Inventors: Herve Cado, Frederic Arrouy, Yvon Helmstetter