Patents by Inventor Savyasachee Liptarag Mathur

Savyasachee Liptarag Mathur 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).

  • Polarization switching lidar device and method
    Patent number: 8115925
    Abstract: A polarization switching lidar device, arranged for remote detection and characterization of airborne aggregations of particulates, includes a pulsed laser, a mirror, a polarizing beam splitter, an actively controlled retarder arranged to be controllably alternated between a zero retardation state and a quarter-wave retardation state such that the transmitted portion of the exiting laser light beam is linearly polarized in a predetermined direction when the actively controlled retarder is in the zero retardation state, while being circularly polarized in a predetermined rotational sense when the actively controlled retarder is in the quarter-wave retardation state. A directable telescoping assembly is arranged to collect photons backscattered by the airborne aggregations of particulates and to redirect the collected portion of depolarized backscattered photons onto the polarizing beam splitter.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: February 14, 2012
    Assignee: Sigma Space Corp.
    Inventors: Savyasachee Liptarag Mathur, Yunhui Zheng, Edward Lee Leventhal
  • POLARIZATION SWITCHING LIDAR DEVICE AND METHOD
    Publication number: 20120026497
    Abstract: A polarization switching lidar device, arranged for remote detection and characterization of airborne aggregations of particulates, includes a pulsed laser, a mirror, a polarizing beam splitter, an actively controlled retarder arranged to be controllably alternated between a zero retardation state and a quarter-wave retardation state such that the transmitted portion of the exiting laser light beam is linearly polarized in a predetermined direction when the actively controlled retarder is in the zero retardation state, while being circularly polarized in a predetermined rotational sense when the actively controlled retarder is in the quarter-wave retardation state. A directable telescoping assembly is arranged to collect photons backscattered by the airborne aggregations of particulates and to redirect the collected portion of depolarized backscattered photons onto the polarizing beam splitter.
    Type: Application
    Filed: September 21, 2011
    Publication date: February 2, 2012
    Applicant: SIGMA SPACE CORPORATION
    Inventors: Savyasachee Liptarag Mathur, Yunhui Zheng, Edward Lee Leventhal
  • Polarization switching lidar device and method
    Patent number: 8054464
    Abstract: A polarization switching lidar device is arranged for remote detection and characterization of airborne aggregations of particulates. It includes a pulsed laser, a mirror, a polarizing beam splitter, an actively controlled retarder arranged to be controllably alternated between a zero retardation state and a quarter-wave retardation state such that the transmitted portion of the exiting laser light beam is linearly polarized in a predetermined direction when the actively controlled retarder is in the zero retardation state, while being circularly polarized in a predetermined rotational sense when the actively controlled retarder is in the quarter-wave retardation state. A directable telescoping assembly is arranged to collect photons backscattered by the airborne aggregations of particulates and to redirect the collected portion of depolarized backscattered photons onto the polarizing beam splitter.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: November 8, 2011
    Assignee: Sigma Space Corp.
    Inventors: Savyasachee Liptarag Mathur, Yunhui Zheng, Edward Lee Leventhal
  • POLARIZATION SWITCHING LIDAR DEVICE AND METHOD
    Publication number: 20110181881
    Abstract: A polarization switching lidar device is arranged for remote detection and characterization of airborne aggregations of particulates. It includes a pulsed laser, a mirror, a polarizing beam splitter, an actively controlled retarder arranged to be controllably alternated between a zero retardation state and a quarter-wave retardation state such that the transmitted portion of the exiting laser light beam is linearly polarized in a predetermined direction when the actively controlled retarder is in the zero retardation state, while being circularly polarized in a predetermined rotational sense when the actively controlled retarder is in the quarter-wave retardation state. A directable telescoping assembly is arranged to collect photons backscattered by the airborne aggregations of particulates and to redirect the collected portion of depolarized backscattered photons onto the polarizing beam splitter.
    Type: Application
    Filed: January 25, 2010
    Publication date: July 28, 2011
    Applicant: SIGMA SPACE CORPORATION
    Inventors: Savyasachee Liptarag Mathur, Yunhui Zheng, Edward Lee Leventhal