|Citation:||Liu B, Yu Y, Chen Z, Han W Q. True random coded photon counting Lidar. Opto-Electron Adv 3, 190044 (2020). doi: 10.29026/oea.2020.190044|
A true random coded photon counting Lidar system is proposed in this paper, in which a single photon detector acts as the true random sequence signal generator instead of the traditional function generator. Compared with the traditional pseudo-random coded method, the true random coded method not only improves the anti-crosstalk capability of the system, but more importantly, it effectively overcomes the adverse effect of the detector's dead time on the ranging performance. The experiment results show that the ranging performance of the true random coded method is obviously better than that of the pseudo-random coded method. As a result, a three-dimensional scanning imaging of a model car is completed by the true random coded method.
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(a) Pseudo-random sequence and (b) true random sequence.
True random coded photon counting Lidar system.
Normalized auto-correlation function of the true random sequence
Normalized auto-correlation range images with two different echo photons number for the true random coded method and the pseudo-random coded method.
The detection probability statistical results of the true random coded method and the pseudo-random coded method at different mean echo photons number.
Normalized cross-correlation range images for the true random sequence (a) and the sparse pseudo-random sequence (b).
(a) The picture of the model car and (b) three-dimensional scanning imaging of the model car.