Patents by Inventor Habib Hamam

Habib Hamam 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).

  • Light diffraction device using reconfigurable spatial light modulators and the fractional talbot effect
    Patent number: 5617227
    Abstract: Light diffraction device using reconfigurable spatial light modulators and the fractional Talbot effect. This device comprises two liquid crystal, electrically addressable spatial light modulators (M1, M2) on a semiconductor substrate and at least one polarizing beam splitter (2), the optical path between the modulators being equal to (2k+1) Z.sub.T /4.sup.n in which k and n are natural integers, n differing from zero, and Z.sub.T is the Talbot distance relative to a biperiodic hologram obtained by means of one of the modulators and at one of the periods equal to double the other, which makes it possible to obtain a reconfigurable hologram having four phase levels. Application to optical telecommunications.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: April 1, 1997
    Assignee: France Telecom Etablissement Autonome De Droit Public
    Inventors: Jean-Louis De Bougrenet De La Tocnaye, Habib Hamam, Renaud Moignard