Distance information acquisition device, multipath detection device, and multipath detection method

A multipath detection device for detecting multipath using a light emitter which emits light according to an emission pulse indicating emission and a solid-state imaging element which performs exposure according to an exposure pulse indicating exposure, the multipath detection device comprising:

• an emission/exposure controller which generates a timing signal indicating a plurality of pairs of the emission pulse and the exposure pulse that have a time difference, the time difference being different in each of the plurality of pairs;
• and
• a multipath detector which obtains a sequence of received light signals from the solid-state imaging element by the emission and the exposure that correspond to each of the plurality of pairs, compares the sequence of received light signals that has been obtained and reference data created in advance as a model of a sequence of received light signals in a multipath-free environment, and determines a presence or absence of multipath according to a difference in a comparison result.