ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,228,647, issued on Feb. 18, was assigned to NEC Corp. (Tokyo).
"Distance-measurement apparatus and distance-measurement method" was invented by Hidemi Noguchi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A generation unit (2) generates a plurality of transmission pulses of which the strength of an optical signal changes in a pulse-like manner. Note that the generation part (2) generates a plurality of transmission pulses having frequency offsets different from each other. The transmission unit (4) repeatedly transmits transmission pulses generated by the generation unit (2). The reception part (6) receives reflected pulses of the respective tra...