TIME-OF-FLIGHT DISTANCE MEASUREMENT DEVICE AND METHOD FOR SAME

摘要

A light emitting element emits a modulated light modulated in a pattern having a repetitive period toward a space. A driving unit drives the light emitting element. A light receiving element distributes charges corresponding to an incident light containing a reflected light obtained by reflecting the modulated light on an object to storage capacitors and stores the distributed charges. A control unit controls an exposure of the light receiving element. A signal processing unit measures a distance to the object by using a value sampled by the light receiving element. The control unit controls the exposure of the light receiving element to give a sensitivity to at least one high-order harmonic. The signal processing unit linearly combines a component of a fundamental wave with a component of the at least one high-order harmonic to measure the distance to the object.

主权项

1. A time-of-flight distance measurement device comprising:
a light emitting element configured to emit a modulated light modulated in a pattern having a repetitive period toward a space; a driving unit configured to drive the light emitting element; a light receiving element configured to distribute charges corresponding to an incident light containing a reflected light obtained by reflecting the modulated light on an object to a plurality of storage capacitors and to store the distributed charges; a control unit configured to control an exposure of the light receiving element; and a signal processing unit configured to measure a distance to the object by using a value sampled by the light receiving element, wherein the control unit is configured to control the exposure of the light receiving element to give a sensitivity to at least one high-order harmonic, and the signal processing unit is configured to linearly combine a component of a fundamental wave with a component of the at least one high-order harmonic to measure the distance to the object.