SPATIAL INFORMATION DETECTION DEVICE

PROBLEM TO BE SOLVED: To provide a configuration using a plurality of light-emitting devices to project intensity modulation light, having a timing adjustment period for light projection and light reception, capable of suppressing electric power consumption during the timing adjustment period.SOLUTION: Light-emitting devices 11 are divided into groups 121, 122, 123. An energization control element 13 provided for each of the groups 121, 122, 123 controls an optical output. An operation mode selection unit 103 selects one of a calibration mode for measuring a time difference of a detection signal Sg2 to a reference signal Sg0 and a measurement mode for measuring time from when the light-emitting device 11 projects intensity modulation light to when a light-receiving element 21 receives the light. In the measurement mode, delay time is set by a voltage control delay circuit 1013 such that the time difference of the detection signal Sg2 to the reference signal Sg0 is maintained in a specified value. A path selection unit 15 energizes, when the calibration mode is selected, only the energization control element 13 corresponding to a group 121, from among the light-emitting devices 11.