Patents by Inventor Raymond William Simpson

Raymond William Simpson 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).

  • Wavelength locker
    Patent number: 7065112
    Abstract: A wavelength locker comprising a semiconductor or air gap etalon is used to monitor and maintain the output wavelength of a coherent radiation source. Said etalon may be fabricated from a commercially available silicon wafer, with individual regions of the wafer, each functioning as a separate etalon, etched or otherwise processed to produce different thicknesses. Illumination by the coherent radiation source generated transmitted signal intensities that are detected and processed to determine the output wavelength of the coherent radiation source. A wavelength tuner is then used to maintain or vary the output wavelength based on continuous measurements of etalon signal intensity.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: June 20, 2006
    Assignee: Princeton Optronics, Inc.
    Inventors: Chuni Ghosh, Laurence S. Watkins, Qing Wang, Raymond William Simpson, Steven R Leffler
  • Wavelength locker
    Publication number: 20040228375
    Abstract: A wavelength locker comprising a semiconductor or air gap etalon is used to monitor and maintain the output wavelength of a coherent radiation source. Said etalon may be fabricated from a commercially available silicon wafer, with individual regions of the wafer, each functioning as a separate etalon, etched or otherwise processed to produce different thicknesses. Illumination by the coherent radiation source generated transmitted signal intensities that are detected and processed to determine the output wavelength of the coherent radiation source. A wavelength tuner is then used to maintain or vary the output wavelength based on continuous measurements of etalon signal intensity.
    Type: Application
    Filed: May 12, 2003
    Publication date: November 18, 2004
    Applicant: Princeton Optronics, Inc.
    Inventors: Chuni Ghosh, Laurence S. Watkins, Qing Wang, Raymond William Simpson, Steven R. Leffler
  • Sheet transfer member having at least one outwardly opening sheet-receiving slot and sheet withdrawl portion and apparatus including such a member
    Patent number: 5775682
    Abstract: A sheet transfer member (17) has at least one outwardly opening slot (20) into which a sheet can be received. The member (17) is rotatably mounted in use so that a sheet in the slot (20) can be transferred to a sheet stacking position. A portion of the rotatable member (17) comprises high friction insert (22) which, during a dispense operation, withdraws sheets from the stacking position.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: July 7, 1998
    Assignee: De La Rue International Limited
    Inventors: Steven Michael Hosking, Raymond William Simpson-Davis