Patents by Inventor Daniel A. LeMaster

Daniel A. LeMaster 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).

  • Microgrid arrangement for integrated imaging polarimeters
    Patent number: 9857226
    Abstract: An integrated microgrid imaging polarimeter comprises a repeating pattern of wiregrid polarizers in a new 2×4 array that improves image resolution and quality by increasing the spatial bandwidth available for each Stokes image despite that the new repeating pattern is larger than prior art 2×2 arrays. An example embodiment has polarization orientations of the wiregrid polarizers in each 2×4 array, beginning from an arbitrary top left polarizer of each array and continuing clockwise, as: 45 degrees; zero degrees; 315 degrees; 90 degrees; zero degrees; 45 degrees; 90 degrees; and, 315 degrees. The disclosure includes an analysis showing development of the new 2×4 array and supporting its improved performance over prior art 2×2 arrays.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: January 2, 2018
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Daniel A. LeMaster, Keigo Hirakawa
  • Microgrid Arrangement for Integrated Imaging Polarmeters
    Publication number: 20160231177
    Abstract: An integrated microgrid imaging polarimeter comprises a repeating pattern of wiregrid polarizers in a new 2×4 array that improves image resolution and quality by increasing the spatial bandwidth available for each Stokes image despite that the new repeating pattern is larger than prior art 2×2 arrays. An example embodiment has polarization orientations of the wiregrid polarizers in each 2×4 array, beginning from an arbitrary top left polarizer of each array and continuing clockwise, as: 45 degrees; zero degrees; 315 degrees; 90 degrees; zero degrees; 45 degrees; 90 degrees; and, 315 degrees. The disclosure includes an analysis showing development of the new 2×4 array and supporting its improved performance over prior art 2×2 arrays.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 11, 2016
    Inventors: Daniel A. LeMaster, Keigo Hirakawa