Patents by Inventor Asbjørn Mejnertsen

Asbjørn Mejnertsen 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).

  • Apparatus and method for measuring retroreflectivity of a surface
    Patent number: 9176057
    Abstract: An apparatus for measuring the retroreflectivity of a surface. The apparatus comprises a light source for illuminating an area of said surface at an incident angle relative to the surface; a detector for detecting light reflected back from the surface at an observation angle relative to the surface; a signal processing unit adapted to receive a detector signal from the detector and to determine, from at least the received detector signal, a measure of retro reflectivity of the surface; a range finder for measuring a distance between the apparatus and the illuminated area. The signal processing unit is further adapted to adjust the measure of retroreflectivity responsive to the measured distance.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: November 3, 2015
    Assignee: DELTA DANSK ELEKTRONIK, LYS & AKUSTIK
    Inventors: Kaj Sørensen, Asbjørn Mejnertsen, Jan Harries Hansen, Hans Ole Nielsen
  • APPARATUS AND METHOD FOR MEASURING RETROREFLECTIVITY OF A SURFACE
    Publication number: 20130194565
    Abstract: An apparatus for measuring the retroreflectivity of a surface. The apparatus comprises a light source for illuminating an area of said surface at an incident angle relative to the surface; a detector for detecting light reflected back from the surface at an observation angle relative to the surface; a signal processing unit adapted to receive a detector signal from the detector and to determine, from at least the received detector signal, a measure of retro reflectivity of the surface; a range finder for measuring a distance between the apparatus and the illuminated area. The signal processing unit is further adapted to adjust the measure of retroreflectivity responsive to the measured distance.
    Type: Application
    Filed: February 4, 2011
    Publication date: August 1, 2013
    Inventors: Kaj Sørensen, Asbjørn Mejnertsen, Jan Harries Hansen, Hans Ole Nielsen