Patents by Inventor Abel L. Thangawng

Abel L. Thangawng 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).

  • Acoustic fresnel zone plate lens for aqueous environments and methods of using same
    Patent number: 9922638
    Abstract: An apparatus in a surrounding liquid and methods of using same. The apparatus includes an acoustic Fresnel zone plate comprising a compliant frame, a substrate connected to the frame, and an acoustic diffraction grating connected to the substrate. The acoustic diffraction grating includes a plurality of concentric rings or a plurality of concentric islands. The substrate is acoustic-impedance-mismatched with the acoustic diffraction grating. The acoustic Fresnel zone plate includes at least one acoustic focal spot. The substrate is acoustic-impedance-mismatched with the surrounding liquid and the acoustic diffraction grating is acoustic-impedance-matched with the surrounding liquid, or the substrate is acoustic-impedance-matched with the surrounding liquid and the acoustic diffraction grating is acoustic-impedance-mismatched with the surrounding liquid.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: March 20, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: David C. Calvo, Abel L. Thangawng
  • ACOUSTIC FRESNEL ZONE PLATE LENS FOR AQUEOUS ENVIRONMENTS AND METHODS OF USING SAME
    Publication number: 20160125870
    Abstract: An apparatus in a surrounding liquid and methods of using same. The apparatus includes an acoustic Fresnel zone plate comprising a compliant frame, a substrate connected to the frame, and an acoustic diffraction grating connected to the substrate. The acoustic diffraction grating includes a plurality of concentric rings or a plurality of concentric islands. The substrate is acoustic-impedance-mismatched with the acoustic diffraction grating. The acoustic Fresnel zone plate includes at least one acoustic focal spot. The substrate is acoustic-impedance-mismatched with the surrounding liquid and the acoustic diffraction grating is acoustic-impedance-matched with the surrounding liquid, or the substrate is acoustic-impedance-matched with the surrounding liquid and the acoustic diffraction grating is acoustic-impedance-mismatched with the surrounding liquid.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 5, 2016
    Inventors: DAIVD C. CALVO, Abel L. Thangawng