Signal processing circuit for a light receiver and measurement system therefor

The device includes a transmitter and a spaced-apart receiver. The transmitter emits at least two measurement beams which scan a surface in a defined relation to each other. The receiver receives the measurement beams resolved w.r.t. time, so that the time signature of the beam reception can be used to determine the transmitter-receiver separation. The beams may be laser light beams. An independent claim is included for a method of measuring distance.