Ultra-long-distance single-photon three-dimensional laser radar scanning imaging system

Abstract

The invention discloses an ultra-long-distance single-photon three-dimensional laser radar scanning imaging system, which belongs to the field of single-photon laser radar detection. The system comprises a transmitting unit, a receiving unit, a superconducting nanowire single-photon detector and a data processing unit, the transmitting unit is used for transmitting laser pulse to a target imagingarea after the light beam direction of the laser pulse is adjusted so as to reflect a target echo light signal; the receiving unit is used for collecting and processing a target echo optical signal; the superconducting nanowire single-photon detector is used for receiving the processed target echo optical signal and converting the processed target echo optical signal into an electric signal; and the data processing unit is used for collecting the electric signal, processing the electric signal into a histogram to obtain distance information of the target, continuously adjusting the light beamdirection of the laser pulse when the scanning of the target imaging area is not completed until the scanning of the whole area is completed, and displaying a three-dimensional scanning imaging result. According to the invention, the limit detection distance of the system can be improved, and three-dimensional scanning imaging of the target area is realized.

Description

technical field [0001] The invention belongs to the field of single-photon laser radar detection, and more specifically relates to an ultra-long-range single-photon three-dimensional laser radar scanning imaging system based on a superconducting nanowire single-photon detector and a two-dimensional scanning mirror. Background technique [0002] Lidar is an active modern optical remote sensing technology that combines traditional radar technology and laser technology. Lidar has the characteristics of high angular resolution, high distance resolution and high measurement accuracy, and has become an important means of active detection. Common lidars include: ranging lidar, speed measuring lidar, 3D imaging lidar, mapping lidar and synthetic aperture lidar. Among them, 3D imaging lidar technology has a wide range of needs and applications in the fields of scientific experiments, military and civilian fields. [0003] The three-dimensional scanning laser radar emits laser pulse...

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention proposes an ultra-long-range single-photon three-dimensional laser radar scanning imaging system, thereby solving the problem of the limit detection of the original single-photon laser radar detection system due to detector dark noise and detection efficiency. Limitations of distance and technical problems of distance measurement only

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