Photodetection device and photodetection system

Abstract

A photodetection device according to the present disclosure includes: a plurality of light-receiving sections that each includes a light-receiving element, and generates a first pulse signal including a pulse corresponding to a result of light reception by the light-receiving element; an adder that generates a second pulse signal by selecting one or more first pulse signals from a plurality of the first pulse signals generated by the plurality of light-receiving sections and performing addition processing on the basis of the one or more selected first pulse signals; a divider that performs division processing for dividing the second pulse signal into a plurality of third pulse signals in a time division manner on the basis of a clock signal; a plurality of counters that is provided corresponding to the plurality of third pulse signals, and each performs count processing on the basis of a corresponding one of the third pulse signals; and a controller that sets signal number of the one or more pulse signals to be subjected to the addition processing on the basis of respective count values of the plurality of counters.