Patents Assigned to HJELMSTAD AS
  • Publication number: 20190146074
    Abstract: A laser detection and ranging device for detecting an object under a water surface, the laser detection and ranging device having a laser transmitter being configured to modulate a laser beam by a binary pseudo-random coding sequence to obtain a modulated laser beam, and to transmit the modulated laser beam towards the water surface, a laser detector for detecting a reflected laser beam, the reflected laser beam forming a reflected version of the transmitted laser beam, and a processor for detecting the object under the water surface upon the basis of the reflected laser beam.
    Type: Application
    Filed: December 18, 2018
    Publication date: May 16, 2019
    Applicants: LADAR LIMITED, HJELMSTAD AS
    Inventor: Jens HJELMSTAD
  • Patent number: 10247818
    Abstract: A detection system for detecting an object on a water surface, the detection system having a radio detection and ranging device for coarsely detecting a target water surface area with the object, and a laser detection and ranging device for detecting the object within the target water surface area, wherein the laser detection and ranging device includes a laser transmitter for transmitting a laser beam towards the target water surface area, a laser detector for detecting a reflected laser beam, the reflected laser beam forming a reflected version of the transmitted laser beam, and a processor for detecting the object within the target water surface area upon the basis of the reflected laser beam.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: April 2, 2019
    Assignees: LADAR LIMITED, HJELMSTAD AS
    Inventor: Jens Hjelmstad
  • Patent number: 10175356
    Abstract: A laser detection and ranging device for detecting an object under a water surface, the laser detection and ranging device having a laser transmitter being configured to modulate a laser beam by a binary pseudo-random coding sequence to obtain a modulated laser beam, and to transmit the modulated laser beam towards the water surface, a laser detector for detecting a reflected laser beam, the reflected laser beam forming a reflected version of the transmitted laser beam, and a processor for detecting the object under the water surface upon the basis of the reflected laser beam.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: January 8, 2019
    Assignees: LADAR LIMITED, HJELMSTAD AS
    Inventor: Jens Hjelmstad