Patents by Inventor Barry L. Stann

Barry L. Stann 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).

  • Publication number: 20200025883
    Abstract: A system, device, apparatus and method for receiving a laser signal such as within a LADAR receiver.
    Type: Application
    Filed: April 8, 2019
    Publication date: January 23, 2020
    Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I
    Inventors: Barry L. Stann, Mark M. Giza
  • Patent number: 7675610
    Abstract: Ladar systems and methods are provided. One embodiment is a ladar system comprising: a chirp generator for generating a chirped waveform; a laser for transmitting a light signal toward a target, the light signal being modulated by the chirped waveform; and a photon-counting sensor for receiving a temporally-modulated photon stream corresponding to the modulated light signal being reflected from the target and toward the ladar system, the photon-counting sensor gated relative to the chirped waveform.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: March 9, 2010
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Brian Redman, William C. Ruff, Barry L. Stann
  • Patent number: 7570347
    Abstract: An imaging method and apparatus using an unmodulated pulsed laser with a chirp modulated receiver is provided for producing 3D plus intensity imagery of targets in heavily cluttered locations The apparatus includes a laser for emitting a laser beam and synchronizing a receiver to receive a reflected laser signal and transform the reflected laser signal into a displayable image that includes intensity information.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: August 4, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: William Charles Ruff, Barry L. Stann
  • Publication number: 20090002680
    Abstract: An imaging method and apparatus using an unmodulated pulsed laser with a chirp modulated receiver is provided for producing 3D plus intensity imagery of targets in heavily cluttered locations The apparatus includes a laser for emitting a laser beam and synchronizing a receiver to receive a reflected laser signal and transform the reflected laser signal into a displayable image that includes intensity information.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 1, 2009
    Inventors: William Charles Ruff, Barry L. Stann
  • Publication number: 20080246944
    Abstract: Ladar systems and methods are provided. One embodiment is a ladar system comprising: a chirp generator for generating a chirped waveform; a laser for transmitting a light signal toward a target, the light signal being modulated by the chirped waveform; and a photon-counting sensor for receiving a temporally-modulated photon stream corresponding to the modulated light signal being reflected from the target and toward the ladar system, the photon-counting sensor gated relative to the chirped waveform.
    Type: Application
    Filed: April 5, 2007
    Publication date: October 9, 2008
    Inventors: Brian Redman, William C. Ruff, Barry L. Stann
  • Patent number: 7411662
    Abstract: A system and method for performing high-resolution imagery of a target are provided. One embodiment is a method of performing high-resolution imagery of a target comprising: generating a chirped waveform that modulates a light signal transmitted toward a target for performing active LADAR of the target; generating a low-frequency local oscillator waveform for performing active imaging; and simultaneously performing passive imaging and active LADAR.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: August 12, 2008
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: William C. Ruff, Barry L. Stann, Paul H. Shen, Brian C. Redman, Keith M. Aliberti
  • Patent number: 6844924
    Abstract: A high range resolution ladar includes a chirp generator for producing a chirp signal waveform that is used by a laser diode to propagate a divergent laser light waveform. The reflected light signals from the target are directed to a self mixing detector that is coupled to the chirp generator where the responsivity of the detector varies in accordance with the chirp waveform for converting reflected light signals from the target to electrical signals and for mixing the converted electrical signal with the chirp waveform to produce an output electrical signal whose frequency is proportional to the range to the target. The self-mixing detector includes at least one detector having a semiconductor substrate and first and second electrodes deposited on the substrate and spaced from each other, wherein the first set of electrodes is connected to the chirp generator and the second set of electrodes is connected to a memory for storing a plurality of frames of image data.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: January 18, 2005
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: William C. Ruff, Barry L. Stann, Paul H. Shen
  • Patent number: 6618125
    Abstract: A method and apparatus of a plurality of detecting elements for detecting and producing an image of an object includes a signal generator for generating a waveform signal, a laser for producing a light signal modulated by the waveform signal, and a mixing and detecting device coupled to and driven by the signal generator for converting reflected light signals received from the target into electrical signals and for mixing the converted electrical signals with the waveform signal to produce an output electrical signal. A read-out is connected to the mixing and detecting device for removing the output electrical signals from the mixing and detecting, and a signal processor is connected to the read-out for processing the output electrical signals from the read-out to detect and produce and image of the object.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: September 9, 2003
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Barry L. Stann
  • Publication number: 20030076485
    Abstract: A high range resolution ladar includes a chirp generator for producing a chirp signal waveform that is used by a laser diode to propagate a divergent laser light waveform. The reflected light signals from the target are directed to a self mixing detector that is coupled to the chirp generator where the responsivity of the detector varies in accordance with the chirp waveform for converting reflected light signals from the target to electrical signals and for mixing the converted electrical signal with the chirp waveform to produce an output electrical signal whose frequency is proportional to the range to the target. The self-mixing detector includes at least one detector having a semiconductor substrate and first and second electrodes deposited on the substrate and spaced from each other, wherein the first set of electrodes is connected to the chirp generator and the second set of electrodes is connected to a memory for storing a plurality of frames of image data.
    Type: Application
    Filed: June 28, 2002
    Publication date: April 24, 2003
    Inventors: William C. Ruff, Barry L. Stann, Paul H. Shen
  • Publication number: 20020048012
    Abstract: A method and apparatus of a plurality of detecting elements for detecting and producing an image of an object includes a signal generator for generating a waveform signal, a laser for producing a light signal modulated by the waveform signal, and a mixing and detecting device coupled to and driven by the signal generator for converting reflected light signals received from the target into electrical signals and for mixing the converted electrical signals with the waveform signal to produce an output electrical signal. A read-out is connected to the mixing and detecting device for removing the output electrical signals from the mixing and detecting, and a signal processor is connected to the read-out for processing the output electrical signals from the read-out to detect and produce and image of the object.
    Type: Application
    Filed: September 5, 2001
    Publication date: April 25, 2002
    Inventor: Barry L. Stann
  • Patent number: 5608514
    Abstract: In a high range resolution ladar, a chirp signal waveform is propagated as a divergent laser light waveform and the target reflected return is collected and converted to a current proportional to power. An undelayed chirp signal is added in a mixer to the return current and then low pass filtered to recover a mixed intermediate frequency (IF) signal having a frequency proportional to the target range. Periodically, the light circuit is interrupted and the chirp signal is processed through the mixer and low pass filter without a target return current and this output, the mixer self-clutter, is stored. This stored self-clutter signal is subsequently subtracted from the mixed IF signal on a chirp by chirp basis to cancel the self-clutter produced by the mixer. The subtracted signal is then frequency analyzed to determine target range.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: March 4, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Barry L. Stann, William C. Ruff, Zoltan G. Sztankay
  • Patent number: 5122803
    Abstract: A method and apparatus of imaging moving targets with an aircraft mounted complex radar system has a plurality of independent, but synchronized synthetic aperture radars (SARs) positioned on the aircraft at equal separation distance .DELTA.x along the flight velocity vector V.sub.p of the aircraft. Frequency modulated (or otherwise coded) pulses are transmitted therefrom with an interpulse period T.sub.p, where 1/T.sub.p is an integral multiple of V.sub.p /.DELTA.x. The pulse repetition frequency, platform velocity, and spacing between adjacent SARs are all chosen to create the effect of a stationary radar momentarily fixed in space. A two dimensional complex IF (intermediate frequency) output signal is recovered by the first SAR on the aircraft. This signal is identical to that recovered by a conventional SAR. The two dimensions are fast time and downtract position. If only one point target is present, the IF output signal is the point target's phase history.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: June 16, 1992
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Barry L. Stann, Peter Alexander