ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,382,182, issued on Aug. 5, was assigned to Digimarc Corp. (Beaverton, Ore.).
"Lighting arrangements for material sorting" was invented by Hugh L. Brunk (Portland, Ore.), John D. Lord (West Linn, Ore.) and Tomas Filler (Beaverton, Ore.).
According to the abstract* released by the U.S. Patent & Trademark Office: "In one aspect, an elongated lighting module includes plural colors of LEDs that flash in a cyclical sequence to provide multi-spectral illumination. Several such modules can be arranged end-to-end to span a conveyor system that transports a stream of plastic waste items in a recycling center, enabling capture of differently-illuminated image frames depicting the items. Each mod...