RANGING DEVICE FOR CALCULATING A FLIGHT TIME OF LIGHT EMITTED FROM AN EMITTING DEVICE

A ranging device including: a control unit controlling a light emission timing in a light emitting device divided into emitting regions and a start timing of time counting; a receiving unit divided into receiving regions corresponding one-to-one to the emitting regions; a latch unit generating a light reception time value indicating an elapsed time from the start of the time counting to incidence of light based on the time count value and light reception signals; and a calculation unit calculating a flight time of light based on the light reception time value. Light emission timings of the emitting regions are different from each other, and a time difference between two light emission timings is shorter than a measurement period in each receiving region. The calculation unit calculates the flight time based on the light reception time value and the time difference.