Patents by Inventor Marie-Chantal Andraud

Marie-Chantal Andraud 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).

  • Passive optical limiter having nonlinear material
    Patent number: 8228584
    Abstract: The invention relates to a passive optical limiter having a nonlinear material capable of switching in a predetermined optical band from a transparent state to an opaque state as a function of the power of an incident laser beam. The nonlinear material is an organic dye which comprises molecules derived from 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene into which a nitrogen atom is inserted at the meso position, referred to as aza-bodipy molecules, and which have conjugated ? chains functionalized so as to exhibit absorption for two photons around an incident beam wavelength lying between 1.45 ?m and 1.6 ?m.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: July 24, 2012
    Assignee: Ecole Normale Superieure de Lyon
    Inventors: Gerard Berginc, Patrick Feneyrou, Pierre-Antoine Bouit, Olivier Maury, Marie-Chantal Andraud
  • Passive Optical Limiter Having Nonlinear Material
    Publication number: 20100213356
    Abstract: The invention relates to a passive optical limiter having a nonlinear material capable of switching in a predetermined optical band from a transparent state to an opaque state as a function of the power of an incident laser beam. The nonlinear material is an organic dye which comprises molecules derived from 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene into which a nitrogen atom is inserted at the meso position, referred to as aza-bodipy molecules, and which have conjugated ? chains functionalized so as to exhibit absorption for two photons around an incident beam wavelength lying between 1.45 ?m and 1.6 ?m.
    Type: Application
    Filed: February 17, 2010
    Publication date: August 26, 2010
    Applicants: THALES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NORMALE SUPERIEURE DE LYON
    Inventors: Gerard Berginc, Patrick Feneyrou, Pierre-Antoine Bouit, Olivier Maury, Marie-Chantal Andraud