Patents by Inventor Jean M. Guerin

Jean M. Guerin 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).

  • Variable attenuator for dual beams
    Patent number: 5311217
    Abstract: A variable attenuator for electronically controlling dual beam intensity comprising a laser source for emitting a light beam, a twisted nematic liquid crystal for exposure control of the light beam, a double-sided multi-layer dielectric thin film coated polarization plate for decreasing the s-component of the light beam to less than or equal to 0.0001 of the light beam emitted from the laser source, and a beam splitting crystal for separating said light beam into two beams of equal intensity.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: May 10, 1994
    Assignee: Xerox Corporation
    Inventors: Jean M. Guerin, Abd-El-Fattah A. Ibrahim