Patents by Inventor Guy N Pearson

Guy N Pearson 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).

  • Patent number: 7397568
    Abstract: A coherent differential absorption lidar (DIAL) device 2 comprises a transmit portion 4 for directing a combined light beam to a remote target and a receive portion 5 for receiving light returned from the remote target and for coherently mixing the received light with its associated local oscillator beam. The combined beam comprises at least two component light beams of discrete wavelengths. The device further comprises a signal correction means. The signal correction means comprising a means for extracting a portion of each component light beam from the transmit portion, a means for introducing a frequency difference 62 between each extracted component light beam and its associated local oscillator beam and a means for directing the extracted beam into the receive portion. This provides an additional correction signal thereby improving device performance.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: July 8, 2008
    Assignee: QinetiQ Limited
    Inventors: David J Bryce, Michael Harris, Guy N Pearson, David V Willetts
  • Patent number: 7349094
    Abstract: A coherent laser radar (lidar) device is described. The device has a transmitter portion that comprises a single wavelength laser source, a conversion means (such as an electro-optic modulator) for producing a combined light beam that comprises at least two component light beams of discrete wavelength from the output of said single wavelength laser source, and transmit optics to direct the combined light beam to a remote target. Each component light beam of the combined light beam traverses the same optical path from the single wavelength laser source to the transmit optics. The device is used to make differential absorption measurements.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: March 25, 2008
    Assignee: QinetiQ Limited
    Inventors: Michael Harris, David J Bryce, Guy N Pearson, David V Willetts