Non-vision-field imaging device and method

Abstract

A non-vision-field imaging device comprises a near-infrared pulse laser used for emitting infrared pulse laser, a double-telescope module used for emitting the infrared pulse laser to an intermediatewall after beam expansion and collimation, and receiving the infrared pulse laser scattered back through the intermediate wall, and the double-telescope module is used for emitting the infrared pulselaser to the intermediate wall before the infrared pulse laser is scattered back by the intermediate wall.Wherein the single-photon detector is used for detecting the number of photons of infrared pulse laser scattered back through the intermediate wall, and the computer is used for recording the number of photons and the propagation time of the infrared pulse laser, counting the distribution of the number of photons in time and achieving three-dimensional reconstruction of the target on the basis of the distribution of the number of photons in time. According to the non-vision-field imaging device, a double-telescope system is adopted, coaxial receiving and transmitting of infrared pulse laser can be achieved, the difficulty of a reconstruction algorithm is lowered, and real-time trackingand positioning of a non-vision-field detection target can be achieved.

Description

technical field [0001] The present disclosure relates to the technical field of non-line-of-sight imaging, and in particular, to a non-line-of-sight imaging device and method. Background technique [0002] The 3D non-line-of-sight imaging technology based on LiDAR is a technology for 3D imaging of occluded non-line-of-sight hidden object targets. The realization process of non-line-of-sight imaging is usually to emit laser light onto the reflective surface of the intermediary wall, and use the intermediary wall to scatter the laser light into the blocked non-line-of-sight space. The scattered laser light is reflected by hidden objects in the space. , is reflected to the reflective surface of the intermediary wall again, and then is reflected by the intermediary wall to the receiving system. Finally, the computer system uses information such as the flight time of the laser to realize the hidden object target in the blocked non-visual space through an algorithm. 3D reconstruc...

AI Technical Summary

Problems solved by technology

[0003] At present, this technology has made a series of positive progress in indoor scenes, but although the existing technology can realize non-line-of-sight three-dimensional imaging of hidden objects, the reception efficiency of laser signals is low due to the small field of view of the imaging system. , high background noise, and poor signal-to-noise ratio, the existing technology still fails to achieve kilometer-level non-line-of-sight 3D imaging

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