Patents by Inventor Bhargab Das

Bhargab Das 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).

  • Systems and methods of dual-plane digital holographic microscopy
    Patent number: 9164479
    Abstract: An embodiment of the disclosed DHM system includes a light source configured to emit coherent optical waves, a first optical Fourier element configured to Fourier transform the optical waves from the object area, wherein the Fourier transform occurs at a Fourier plane and the optical waves from the object area includes directly transmitted waves and diffracted waves, a phase modulator at the Fourier plane configured to introduce a phase delay between the directly transmitted waves and the diffracted waves, a second optical Fourier element configured to receive the directly transmitted waves and the diffracted waves from the phase modulator and to inversely Fourier transform the directly transmitted waves and the diffracted waves to provide interfered optical waves, and at least one imaging device configured to record the interfered optical waves at two image planes to generate a first interferogram and a second interferogram.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: October 20, 2015
    Assignee: UNIVERSITY OF MASSACHUSETTS
    Inventors: Bhargab Das, Chandra S. Yelleswarapu, Devulapalli V. G. L. N. Rao
  • Systems and Methods of Dual-Plane Digital Holographic Microscopy
    Publication number: 20130070251
    Abstract: An embodiment of the disclosed DHM system includes a light source configured to emit coherent optical waves, a first optical Fourier element configured to Fourier transform the optical waves from the object area, wherein the Fourier transform occurs at a Fourier plane and the optical waves from the object area includes directly transmitted waves and diffracted waves, a phase modulator at the Fourier plane configured to introduce a phase delay between the directly transmitted waves and the diffracted waves, a second optical Fourier element configured to receive the directly transmitted waves and the diffracted waves from the phase modulator and to inversely Fourier transform the directly transmitted waves and the diffracted waves to provide interfered optical waves, and at least one imaging device configured to record the interfered optical waves at two image planes to generate a first interferogram and a second interferogram.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 21, 2013
    Applicant: University of Massachusetts
    Inventors: Bhargab Das, Chandra S. Yelleswarapu, D.V.G.L.N Rao