Patents by Inventor Richard D. Juday

Richard D. Juday 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: 6680797
    Abstract: A polarization-independent optical switch is disclosed for switching at least one incoming beam from at least one input source to at least one output drain.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: January 20, 2004
    Assignee: The United States of America as represented by the National Aeronautics and Space Administration
    Inventor: Richard D. Juday
  • Publication number: 20030002134
    Abstract: A polarization-independent optical switch is disclosed for switching at least one incoming beam from at least one input source to at least one output drain.
    Type: Application
    Filed: June 21, 2001
    Publication date: January 2, 2003
    Inventor: Richard D. Juday
  • Patent number: 6055086
    Abstract: A method and apparatus for modulating a light beam in an optical processing system is described. Preferably, an electrically-controlled polarizer unit and/or an analyzer unit are utilized in combination with a spatial light modulator and a controller. Preferably, the spatial light modulator comprises a pixelated birefringent medium such as a liquid crystal video display. The combination of the electrically controlled polarizer unit and analyzer unit make it simple and fast to reconfigure the modulation described by the Jones matrix of the spatial light modulator. A particular optical processing objective is provided to the controller. The controller performs calculations and supplies control signals to the polarizer unit, the analyzer unit, and the spatial light modulator in order to obtain the optical processing objective.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: April 25, 2000
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Colin Soutar, Richard D. Juday
  • Patent number: 5859728
    Abstract: A method and apparatus for modulating a light beam in an optical processing system is described. Preferably, an electrically-controlled polarizer unit and/or an analyzer unit are utilized in combination with a spatial light modulator and a controller. Preferably, the spatial light modulator comprises a pixelated birefringent medium such as a liquid crystal video display. The combination of the electrically controlled polarizer unit and analyzer unit make it simple and fast to reconfigure the modulation described by the Jones matrix of the spatial light modulator. A particular optical processing objective is provided to the controller. The controller performs calculations and supplies control signals to the polarizer unit, the analyzer unit, and the spatial light modulator in order to obtain the optical processing objective.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: January 12, 1999
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Soutar Colin, Richard D. Juday
  • Patent number: 5768242
    Abstract: An apparatus is disclosed for reading and/or writing information or to from an optical recording medium having a plurality of information storage layers. The apparatus includes a dynamic holographic optical element configured to focus light on the optical recording medium, a control circuit arranged to supply a drive signal to the holographic optical element, and a storage device in communication with the control circuit and storing at least a first drive signal and a second drive signal. The holographic optical element focusses light on a first one of the plurality of information storage layers when driven by the first drive signal on a second one of the plurality of information storage layers when driven by the second drive signal. An optical switch is also disclosed for connecting at least one light source in a source array to at least one light receiver in a receiver array.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: June 16, 1998
    Assignee: The United States of America as representd by the Administrator of the National Aeronautics and Space Administration
    Inventor: Richard D. Juday
  • Patent number: 5416618
    Abstract: Full complex spatial light modulation is enabled by an optically additive combination of the actions of separate and independent spatial light modulators, even though the independent modulators can each express only a one-parameter subset of complex values called its operating curve. Similarly the operating curve of a single modulator can be shifted (biased) by optically adding a constant complex value.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: May 16, 1995
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics & Space Administration
    Inventor: Richard D. Juday
  • Patent number: 5083378
    Abstract: A two-dimension vernier scale utilizing a cartesian grid on one plate member with a polar grid on an overlying transparent plate member. The polar grid has multiple concentric circles at a fractional spacing of the spacing of the cartesian grid lines. By locating the center of the polar grid on a location on the cartesian grid, interpolation can be made of both the X and Y fractional relationship to the cartesian grid by noting which circles coincide with a cartesian grid line for the X and Y direction.
    Type: Grant
    Filed: January 14, 1991
    Date of Patent: January 28, 1992
    Assignee: The United States of America as represented by the Administrator, National Aeronautics and Space Administration
    Inventor: Richard D. Juday
  • Patent number: 5067019
    Abstract: A video-rate coordinate remapper includes a memory for storing a plurality of transformations on look-up tables for remapping input images from one coordinate system to another. Such transformations are operator selectable. The remapper includes a collective processor by which certain input pixels of an input image are transformed to a portion of the output image in a many-to-one relationship. The remapper includes an interpolative processor by which the remaining input pixels of the input image are transformed to another portion of the output image in a one-to-many relationship. The invention includes certain specific transforms for creating output images useful for certain defects of visually impaired people. The invention also includes circuitry for shifting input pixels and circuitry for scrolling the output matrix.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: November 19, 1991
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Richard D. Juday, Jeffrey B. Sampsell
  • Patent number: 5052807
    Abstract: An apparatus for determining three dimensional positioning relative to a predetermined point utilizing moire interference patterns such that the patterns are complementary when viewed on axis from the predetermined distance. Further, the invention includes means for determining rotational positioning in addition to three dimensional translational positioning.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: October 1, 1991
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Richard D. Juday
  • Patent number: 5029220
    Abstract: A method for tracking an object in a sequence of images is described. Such sequence of images may, for example, be a sequence of television frames. The object in the current frame is correlated with the object in the previous frame to obtain the relative location of the object in the two frames. An optical joint transform correlator apparatus is provided to carry out the process. Such joint transform correlator apparatus forms the basis for laser eye surgical apparatus where an image of the fundus of an eyeball is stabilized and forms the basis for the correlator apparatus to track the position of the eyeball caused by involuntary movement. With knowledge of the eyeball position, a surgical laser can be precisely pointed toward a position on the retina.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: July 2, 1991
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Richard D. Juday