Single-photon three-dimensional scanning imaging system

Abstract

The invention discloses a single-photon three-dimensional scanning imaging system, and the system comprises a laser transmitting unit which is used for transmitting a laser pulse; an echo detection unit which comprises a perforated reflector, telescope equipment and a single-photon detector which are positioned on an emergent light path of the laser emitting unit, wherein laser pulses emitted by the laser emitting unit penetrate through a circular hole in the center of the perforated reflector to enter the telescope equipment, the telescope equipment expands the laser pulses, the expanded laser pulses are transmitted forwards and projected to a target to be measured, a target echo is formed on the surface of the target to be measured, the telescope equipment can reversely receive the target echo, converge the target echo and then emit the target echo to the reflecting surface of the perforated reflector, and the single-photon detector receives a target echo optical signal and performs photoelectric conversion to obtain a first electric signal; and a data processing unit which is connected with the single-photon detector to acquire the first electric signal, processes the first electric signal into a time-dependent single-photon counting histogram, and obtains distance information of the target to be measured based on the histogram.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a single-photon three-dimensional scanning imaging system. Background technique [0002] Underwater laser detection and imaging technology has important military strategic significance. The current underwater laser detection and imaging technology is developing rapidly, but in actual use, there are still many technical difficulties. The main technical difficulties include that the energy attenuation of laser transmission in water is large, and the echo signal intensity reflected by the target is extremely weak; there is a strong scattering effect on laser transmission in water medium, and the forward scattering and backward scattering Noise greatly limits the resolution of target echo optical signal extraction and imaging. [0003] In the prior art, a single-photon three-dimensional scanning imaging system includes an emission optical path and an echo optical pa...

AI Technical Summary

Problems solved by technology

The main technical difficulties include that the energy attenuation of laser transmission in water is large, and the echo signal intensity reflected by the target is extremely weak; there is a strong scattering effect on laser transmission in water medium, and the forward scattering and backward scattering Noise greatly limits the extraction of target echo optical signals and the resolution of imaging

[0003] In the prior art, a single-photon three-dimensional scanning imaging system includes an emission optical path and an echo optical path. Both the emission optical path and the echo optical path need to be equipped with a series of optical components to reflect the optical path and adjust the collimation of the beam. As a result, the single-photon 3D scanning imaging system has a complex structure and a large volume, which is not conducive to the underwater operation of the single-photon 3D scanning imaging system

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