The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2015
Filed:
Feb. 04, 2011
Kaj Sørensen, Kongens Lyngby, DK;
Asbjørn Mejnertsen, Kokkedal, DK;
Jan Harries Hansen, Kongens Lyngby, DK;
Hans Ole Nielsen, Kongens Lyngby, DK;
Kaj Sørensen, Kongens Lyngby, DK;
Asbjørn Mejnertsen, Kokkedal, DK;
Jan Harries Hansen, Kongens Lyngby, DK;
Hans Ole Nielsen, Kongens Lyngby, DK;
DELTA DANSK ELEKTRONIK, LYS & AKUSTIK, Horsholm, DK;
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.