Distance measuring device and distance measuring method

Abstract

A measuring system 100 comprises: a light source 3; a light source driver circuit 17; a plurality of pixels 25 that respectively output electrical signals corresponding to the arrival timing of pulsed light LP; an optical system 5 that splits the pulsed light LP into a first light component LP1 that reflects off of an object Sa and is incident on the pixels 25, and a second light component LP2 that is directly incident on the pixels 25; a pixel driver circuit 13 that applies a control signal for controlling a detection operation of the pixels 25; and a computation circuit 7 that generates distance information corresponding to the object Sa for each of the pixels 25. The computation circuit 7 calculates, on the basis of a plurality of electrical signals output from one pixel 25, time information TOFsig corresponding to the arrival timing of the first light component LP1, and time information TOFref corresponding to the arrival timing of the second light component LP2, and generates distance information by taking the difference between the two pieces of time information TOFsig and TOFref.