Patents by Inventor Ashraf Fouad

Ashraf Fouad 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).

  • Coherence gated doppler motion sensor and medical applications
    Patent number: 9486140
    Abstract: A motion sensor applicable to medical procedures includes a source of light with a wavelength bandwidth and an optical detector. A first optical coupler terminates in a first probe tip and couples the light into the first probe tip. A second optical coupler terminates in a second probe tip and directs onto the detector scattered light returning through the second probe tip. A presentation device outputs a signal that indicates motion in a target volume of a sample in a vicinity of the probe tips based on a Doppler shift of the scattered light. The volume depends on coherence distance determined by the bandwidth. In variations, the first and second tips are the same tip, a multimode fiber is included, the bandwidth is between 0.1% and 5% of a center wavelength, or the presentation device is a speaker, or some combination.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: November 8, 2016
    Assignees: University of Maryland, Baltimore, The United States of America as represented by the Department of Veterans Affairs, St. Jude Medical, University of Maryland, College Park
    Inventors: Cha-Min Tang, Chia-Pin Liang, Yu Chen, Ashraf Fouad, Joseph Schmitt, Nicholas Woolsey
  • Coherence Gated Doppler Motion Sensor and Medical Applications
    Publication number: 20140043618
    Abstract: A motion sensor applicable to medical procedures includes a source of light with a wavelength bandwidth and an optical detector. A first optical coupler terminates in a first probe tip and couples the light into the first probe tip. A second optical coupler terminates in a second probe tip and directs onto the detector scattered light returning through the second probe tip. A presentation device outputs a signal that indicates motion in a target volume of a sample in a vicinity of the probe tips based on a Doppler shift of the scattered light. The volume depends on coherence distance determined by the bandwidth. In variations, the first and second tips are the same tip, a multimode fiber is included, the bandwidth is between 0.1% and 5% of a center wavelength, or the presentation device is a speaker, or some combination.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicants: University of Maryland, Baltimore, The United States of America as represented by the Department of Veterans Affairs, St. Jude Medical, University of Maryland, College Park
    Inventors: Cha-Min Tang, Chia-Pin Liang, Yu Chen, Ashraf Fouad, Joseph Schmitt, Nicholas Woolsey