The invention discloses a
laser three-dimensional imaging device based on a single-
photon detector, belonging to the technical field of photoelectric instruments. A target to be detected is irradiated by the
laser pulse emitted by a
pulsed laser via a scanning
system; the returning photons are received by a receiving / emitting co-axial optical
system, i.e., the returning photons are received by a double-gating single-
photon detecting module via a spectral filter and a
spatial filter and an arriving pulse is outputted, so that the
photon flight time of the target measuring point can be measured by combining the
laser emission detection and the multi-photon arriving
pulse time; and a
data processing unit is used for carrying out the coordinate conversion based on the position and attitude data,
scanning mirror targeting data, and photon
flight time of the three-dimensional imaging device, de-noising and three-dimensional image construction and correction, so as to output the reliable target three-dimensional range image. The invention solves the problems that the existing laser three-dimensional imaging device is incapable of penetrating
vegetation and
camouflage and being miniaturized when conducting long-distance operations.