ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,782,529, issued on Nov. 3, was assigned to MERCEDES-BENZ GROUP AG (Stuttgart, Germany).
"Method and device for detecting dirt on a viewing window of a lidar" was invented by Andreas Scharf (Stuttgart, Germany) and David Peter (Stuttgart, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "Dirt on a viewing window of a lidar is detected using a laser beam transmitted into a detection region and detecting light that is present in the detection region. An intensity image is generated as a greyscale image of intensities of laser reflections from the light reflected and detected as a result of the transmission of the laser beam. A background light image is...