Time measurement device

A time measurement device for measuring a time interval between input timings of first and second target signals each being a pulsed signal, the time measurement device comprising:

• a number-of-periods detector that detects, by using a clock signal with a predetermined clock frequency and a predetermined clock period, the time interval in units of the clock period;
• a phase detection unit including a band-pass filter, wherein
• the band-pass filter receives at least one of the first and second target signals as a filtering target signal and extracts a signal component of the clock frequency from the filtering target signal, and
• the phase detection unit detects a phase difference between the extracted signal and the clock signal;
• and
• a processor that derives, by using a result detected by the number-of-periods detector and the phase difference detected by the phase detection unit, the time interval at a resolution finer than the clock period.