Patents by Inventor Ranjit Pradhan

Ranjit Pradhan 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: 20110221767
    Abstract: A multifacet mirror comprises a catoptric structure configured to reflect light from a first field of view onto an image plane comprising a plurality of sensors, the catoptric structure having a surface comprising a plurality of facets separated by a plurality of catoptric regions; wherein a facet of the plurality of the facets has a second field of view that is smaller than the predetermined field of view; and wherein a catoptric region of the plurality or catoptric regions between two facets of the plurality of facets is configured to reflect light from a world point within the first field of view onto two of the sensors of the plurality of sensors.
    Type: Application
    Filed: August 30, 2010
    Publication date: September 15, 2011
    Inventors: ANDREW KOSTRZEWSKI, TOMASZ JANNSON, RANJIT PRADHAN, NATHANAEL KEEHOON KIM, WENJIAN WANG
  • Patent number: 7781739
    Abstract: A quantum-imaging system for detecting photons, including short-wavelength (<1 nm) photons, is provided. A quantum imaging system can include optical read-out and optical means, and can be configured to perform as both a photon counter and a photon spectrometer. A quantum-imaging system can function as a photon counter and be configured to measure photon beam fluences (e.g., in J/cm2) for both strong beams and weak beams, the latter ones, for example, in the intensity range of 1 pJ/cm2sec, or 0.1 ?Sv/h. The quantum-imaging system can also function as a photon spectrometer and can be configured to measure photon energies with high energy resolution such as, for example, 1% of photon energy.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: August 24, 2010
    Assignee: Physical Optics Corporation
    Inventors: Tomasz Jannson, Ranjit Pradhan, Michael Gertsenshteyn, Victor Grubsky, Igor Marienko, Gennady Medvedkin, Wondwosen Mengesha, Volodymyr Romanov, Yunping Yang
  • Publication number: 20100211787
    Abstract: The present invention provides a method for a data encryption device to perform network communications, the method comprising obtaining an indexed array of encryption keys, wherein the indexed array of encryption keys is shared with a data decryption device; obtaining a message to be encrypted; using a first random or pseudorandom number to determine an index; obtaining a first key from the array of encryption keys, wherein the first key corresponds to the index; selecting a second key from the plurality of encryption keys; encrypting the message using the first key and a second random or pseudorandom number; encrypting the index using the second key and a third random or pseudorandom number; transmitting the encrypted message and the encrypted index to the data decryption device.
    Type: Application
    Filed: November 25, 2009
    Publication date: August 19, 2010
    Inventors: Leonid Bukshpun, Thomas Forrester, Tomasz Jannson, Andrew Kostrzewski, Alexander Milovanov, Ranjit Pradhan
  • Publication number: 20100122832
    Abstract: Self-healing electrical garments and self-healing electrical conductors and components for use in electrical garments are provided. A communication medium of various forms is integrated into a garment seam that is used to join two or more portions of a garment. The communication media can be used to provide electrical or other electromagnetic connection for coupling among a plurality of electrical devices associated with the garment. The self-healing electrical conductor may be used as part of a garment portion or may be used as a joining fiber in a variety of techniques to join garment portions together. The self-healing electrical conductor comprises an electrical conductor, a conductive polymer immediately surrounding or adjacent to the electrical conductor, an insulator enclosing the electrical conductor and the conductive polymer.
    Type: Application
    Filed: November 17, 2008
    Publication date: May 20, 2010
    Inventors: Leonid Bukshpun, Ranjit Pradhan, Kang S. Lee, Thomas Forrester, Tomasz Jannson