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).

  • Patent number: 10317532
    Abstract: A laser is used to emit a diverging laser flash configured to illuminate a detection zone. A pseudoimaging optical receiver system is used to detect reflections from objects in the detection zone. The receiver system includes a time-gated photodetector array that is used to record signatures in a voxel array. A voxel processing module receives the voxel array and detects a reference clutter signal within the array. Potential targets are then detected according to target signals in relation to the reference clutter signal.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: June 11, 2019
    Assignee: PHYSICAL OPTICS CORPORATION
    Inventors: Tomasz Jannson, Ranjit Pradhan, Andrew Kostrzewski
  • Patent number: 9739584
    Abstract: Tracer ammunition is disclosed and includes a projectile having a body; a chamber in the body having a front end and a rear end, the rear end of the chamber being open; an aperture at a rear end of the body providing an opening to the open end of the chamber; and a tracer material disposed within the chamber, wherein the tracer material is configured to combust when ignited and emit optical energy through the aperture as a result of the combustion process. The tracer material may be configured to include a rear-facing surface having a concave contour to aid in directivity of light output from the tracer material.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: August 22, 2017
    Assignee: Physics Optics Corporation
    Inventors: Kang-Bin Chua, Ranjit Pradhan, Jerald A. Cole, Gibum Kim, Joseph Rustick
  • Patent number: 9722646
    Abstract: A RF communication system includes a radio transmitter comprising an RF power amplifier, the RF power amplifier including an input to receive an RF signal for transmission and being configured to amplify the RF signal for transmission across a communication channel; a RF digital pre- or post-distortion configured to compensate for nonlinearity of the RF communication system by operating on the RF signal entering or exiting the amplifier.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: August 1, 2017
    Assignee: Physical Optics Corporation
    Inventors: John Matthews, Leonid Bukshpun, Tomasz Jannson, Andrew Kostrzewski, Ranjit Pradhan
  • Patent number: 9689987
    Abstract: A laser is used to emit a diverging laser flash configured to illuminate a detection zone. A pseudoimaging optical receiver system is used to detect reflections from objects in the detection zone. The receiver system includes a time-gated photodetector array that is used to record signatures in a voxel array. A voxel processing module receives the voxel array and detects a reference clutter signal within the array. Potential targets are then detected according to target signals in relation to the reference clutter signal.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: June 27, 2017
    Assignee: Physical Optics Corporation
    Inventors: Tomasz Jannson, Ranjit Pradhan, Andrew Kostrzewski
  • Publication number: 20150308802
    Abstract: Tracer ammunition is disclosed and includes a projectile having a body; a chamber in the body having a front end and a rear end, the rear end of the chamber being open; an aperture at a rear end of the body providing an opening to the open end of the chamber; and a tracer material disposed within the chamber, wherein the tracer material is configured to combust when ignited and emit optical energy through the aperture as a result of the combustion process. The tracer material may be configured to include a rear-facing surface having a concave contour to aid in directivity of light output from the tracer material.
    Type: Application
    Filed: August 4, 2014
    Publication date: October 29, 2015
    Inventors: Kang-Bin Chua, Ranjit Pradhan, Jerald A. Cole, Gibum Kim, Joseph Rustick
  • Patent number: 9152182
    Abstract: Embodiments of the invention provide a removable memory unit (RMU) that facilitates concatenation of said memory modules irrespective of their individual physical interfaces, enables encryption/decryption keys (including cryptographic ignition keys (CIKs)) to reside onboard the RMU, provides for physical separation of RED and BLACK data in cross-domain environments and implements zeroization functionality onboard the RMU. Further embodiments provide a swappable IO backplane and adapter plates for incorporation into a wide variety of platforms.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: October 6, 2015
    Assignee: Physical Optics Corporation
    Inventors: Shean Thomas McMahon, Robert Anthony Kunc, Kang Lee, Vladimir Esterkin, Ranjit Pradhan, Xiwen Wang, Frank T. Willis, Jr., Andrew Kostrzewski, Sookwang Ro, Thomas Forrester, Tomasz Jannson, Michael Alan Thompson
  • Patent number: 8797406
    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 of 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: Grant
    Filed: March 5, 2013
    Date of Patent: August 5, 2014
    Assignee: Physical Optics Corporation
    Inventors: Andrew Kostrzewski, Tomasz Jannson, Ranjit Pradhan, Nathanael Keehoon Kim, Wenjian Wang
  • Patent number: 8743199
    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: Grant
    Filed: August 30, 2010
    Date of Patent: June 3, 2014
    Assignee: Physical Optics Corporation
    Inventors: Andrew Kostrzewski, Tomasz Jannson, Ranjit Pradhan, Nathanael Keehoon Kim, Wenjian Wang
  • Patent number: 8687810
    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: Grant
    Filed: May 8, 2012
    Date of Patent: April 1, 2014
    Assignee: Physical Optics Corporation
    Inventors: Leonid Bukshpun, Thomas Forrester, Tomasz Jannson, Andrew Kostrzewski, Alexander Milovanov, Ranjit Pradhan
  • Patent number: 8665440
    Abstract: A spectral imaging system comprises a plurality of spectral units arranged in an array, each spectral unit of the plurality of spectral units comprising: a microlens having an optical axis; a spectral filter having a center wavelength and aligned with the optical axis; a fiber optic bundle, the fiber optic bundle having a curved light receiving surface and a planar light output surface, wherein the curved light receiving surface is aligned with the optical axis; and a plurality of pixel sensors configured to receive light from the planar light output surface of the fiber optic taper portion.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: March 4, 2014
    Assignee: Physical Optics Corporation
    Inventors: Iouri V. Kompaniets, Tomasz Jannson, Ranjit Pradhan
  • Patent number: 8576406
    Abstract: A method of constructing a non-imaging beam transformer includes reducing a tailored illumination function from a predetermined light source to a source point response illumination function; calculating a plurality of transformation pairs for the predetermined light source, the transformation pairs identifying the radii of illumination of the light source at given source output angles; determining a desired lighting profile for light output at a region of interest to be illuminated by the beam transformer; determining a surface profile of a surface of the beam transformer such that for given output angles of the light source, the transformation pairs at those output angles are satisfied to correspond to the desired lighting profile; and constructing the beam transformer having the surface profile determined based on the transformation pairs. The method can include characterizing a specific angular output distribution of a light source to calculate the transformation pairs.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: November 5, 2013
    Assignee: Physical Optics Corporation
    Inventors: Tomasz Jannson, Ilya Agurok, Thomas Forrester, Ranjit Pradhan, Min-Yi Shih
  • Publication number: 20130250043
    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 of 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: March 5, 2013
    Publication date: September 26, 2013
    Inventors: ANDREW KOSTRZEWSKI, Tomasz Jannson, Ranjit Pradhan, Nathanael Keehoon Kim, Wenjian Wang
  • Publication number: 20120250863
    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: May 8, 2012
    Publication date: October 4, 2012
    Inventors: Leonid BUKSHPUN, Thomas Forrester, Tomasz Jannson, Andrew Kostrzewski, Alexander Milovanov, Ranjit Pradhan
  • Patent number: 8194858
    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: Grant
    Filed: November 25, 2009
    Date of Patent: June 5, 2012
    Assignee: Physical Optics Corporation
    Inventors: Leonid Bukshpun, Thomas Forrester, Tomasz Jannson, Andrew Kostrzewski, Alexander Milovanov, Ranjit Pradhan
  • Patent number: 8063307
    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: Grant
    Filed: November 17, 2008
    Date of Patent: November 22, 2011
    Assignee: Physical Optics Corporation
    Inventors: Leonid Bukshpun, Ranjit Pradhan, Kang S. Lee, Thomas Forrester, Tomasz Jannson
  • 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
  • Patent number: D751167
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: March 8, 2016
    Assignee: Physical Optics Corporation
    Inventors: Kang-Bin Chua, Ranjit Pradhan
  • Patent number: D773463
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: December 6, 2016
    Assignee: Physical Optics Corporation
    Inventors: Ranjit Pradhan, Andrew Kostrzewski, Kenneth Levin, Kang Lee, Ninad Patnekar, Tomasz Jannson, Thomas Forrester
  • Patent number: D773464
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: December 6, 2016
    Assignee: Physical Optics Corporation
    Inventors: Ranjit Pradhan, Andrew Kostrzewski, Kenneth Levin, Kang Lee, Ninad Patnekar, Tomasz Jannson, Thomas Forrester