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

A three-dimensional laser and radar scanning technology, used in radio wave measurement systems, re-radiation of electromagnetic waves, utilization of re-radiation, etc., can solve the problems of limit detection distance limitation and only distance measurement, achieve low dark noise, improve the limit The effect of detection distance and high detection efficiency

Pending Publication Date: 2019-12-17
HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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[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 pr

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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0040] Based on the superconducting nanowire single-photon detector (SNSPD) and the two-dimensional scanning mirror, the present invention designs a set of ultra-long-range single-photon three-dimensional laser radar scanning that can realize the action distance of more than 50km under good atmospheric conditions imaging system.

[0041] figure 1It is a schematic structural diagram of the ultr...

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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...

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Application Information

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IPC IPC(8): G01S17/89G01S7/487G01S7/493G01S7/481
CPCG01S17/89G01S7/487G01S7/493G01S7/481
Inventor 曾宪江张志杰贾国伟杜卫超孙钢波
Owner HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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