US Patent 10132929 Light scanner

A light scanner in accordance with the principle of the time of flight having at least one light transmitter (2) which transmits consecutive light pulses (3) into a measured zone (5) and having at least one light receiver (4) which receives the light pulses (3) reflected at an object (6) in the measured zone (5) and supplies them in the form of received electrical signals to a control and evaluation unit (7) which determines a distance signal representative of the distance (8) of the object (6) from the light scanner (1) while taking account of the speed of light between the transmission and reception of the light pulse (3), wherein the light receiver (4) has at least one single photon avalanche diode (9).