Patents by Inventor Nelson D. Sheppard

Nelson D. Sheppard 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).

  • Color sensors using polarimetric techniques
    Patent number: 7812951
    Abstract: Embodiments include an apparatus including a color sensor including a transmitter portion and a receiver portion, the transmitter portion including a light source operable to generate and transmit a light having a particular range of wavelengths, the receiver portion including a first detector operable to receive a first portion of the light emitted from the transmitter portion and to measure a luminance of the received first portion of the emitted light, and a second detector including a polarization filter, the second detector operable to receive a second portion of the light emitted from the transmitter after the second portion has passed through the polarization filter, and operable to measure a pure color of the received second portion of transmitted light.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: October 12, 2010
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Francis Lawrence Leard, Nelson D. Sheppard, Patrick J. Delaney, III, Shaun Paul Hentchel
  • COLOR SENSORS USING POLARIMETRIC TECHNIQUES
    Publication number: 20090087191
    Abstract: Embodiments include n apparatus including a color sensor including a transmitter portion and a receiver portion, the transmitter portion including a light source operable to generate and transmit a light having a particular range of wavelengths, the receiver portion including a first detector operable to receive a first portion of the light emitted from the transmitter portion and to measure a luminance of the received first portion of the emitted light, and a second detector including a polarization filter, the second detector operable to receive a second portion of the light emitted from the transmitter after the second portion has passed through the polarization filter, and operable to measure a pure color of the received second portion of transmitted light.
    Type: Application
    Filed: September 27, 2007
    Publication date: April 2, 2009
    Inventors: Francis Lawrence Leard, Nelson D. Sheppard, Patrick J. Delaney, III, Shaun Paul Hentchel