Fig. 1. Schematic diagram of time correlated single photon counting. (a) System diagram; (b) Schematic diagram of the channel analyzer principle

Fig. 2. Time correlated single photon counting measuring distance and velocity system. (a) System diagram; (b) Velocity simulator device

Fig. 3. TCSPC diagram when the target is stationary

Fig. 4. The t-x diagram of the uniform motion process of the target

Fig. 5. The TCSPC graphs obtained by accumulating the number of photons with different numbers, from (a) to (d) are , , , and pulses the number of photons accumulated within the sequence number 不同数量的光子数累计获得的TCSPC图，从(a)~(d)依次为 、 、 、 个脉冲序列数内积累的光子数

Fig. 6. The t-x diagrams formed by measuring distance with different photon numbers, from (a) to (d) are , , and pulses the number of photons accumulated within the sequence number 不同光子数测距形成的t-x图，从(a)~(d)依次为 、 、 、 个脉冲序列数内积累的光子数。