Three-dimensional imaging laser radar and method based on unit single-photon detector

A single-photon detector and three-dimensional imaging technology, which is applied in the field of three-dimensional imaging, can solve the problems of high arrangement requirements, difficulty in realization, and high cost, and achieve the effect of low laser pulse frequency requirements, high imaging frame rate, and easy realization

Inactive Publication Date: 2020-10-02
四川科鱼光电科技有限公司
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Problems solved by technology

Generally, the array single-photon detector of lidar is composed of multiple unit single-photon detectors. The disadvantage of this detector is that the response efficiency of each single-photon detector in the detector array is inconsistent, which affect

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  • Three-dimensional imaging laser radar and method based on unit single-photon detector
  • Three-dimensional imaging laser radar and method based on unit single-photon detector
  • Three-dimensional imaging laser radar and method based on unit single-photon detector

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Embodiment Construction

[0049] The principles and features of the present invention will be described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0050] Such as figure 1 As shown, a three-dimensional imaging laser radar based on a unit single-photon detector provided by an embodiment of the present invention includes: a three-dimensional imaging laser radar based on a unit single-photon detector, including: a laser 110, a main wave Detector 130, optical transmitting system 120, optical receiving system 140, fiber array single photon detector 150 and processor 160; Wherein, main wave detector 130 is used for detecting laser pulse, can adopt photodetector; Processor 160, uses The target object model is obtained by performing image processing according to the collected data points of the target object, and the calculation process can be completed in a computer...

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Abstract

The invention discloses a three-dimensional imaging laser radar and method based on a unit single-photon detector, and relates to the field of three-dimensional imaging. The laser radar includes: a laser beam splitter; a main wave detector which records the emission time of the pulse laser according to the detected pulse laser; an optical emission system, wherein the optical emission system irradiates the other part of pulse laser onto a target object; an optical receiving system which receives pulse laser reflected by the target object and transmits the signals to an optical fiber array single-photon detector; the optical fiber array single-photon detector which detect the pulse laser reflected by the target object in a time-sharing manner to obtain the pixel coordinates of the target object and a receiving moment of pixel echoes; and a processor which determines a distance matrix according to the emission time, the pixel coordinates and the receiving time, so that non-scanning three-dimensional imaging can be performed on the target only by using the unit single-photon detectors, mutual interference between the adjacent unit single-photon detectors does not exist, and the three-dimensional imaging laser radar and method are easy to implement and low in cost.

Description

technical field [0001] The invention relates to the field of three-dimensional imaging, in particular to a three-dimensional imaging lidar and method based on unit single photon detectors. Background technique [0002] 3D imaging lidar realizes 3D imaging by acquiring distance information of the target. The basic principle is to calculate the distance by measuring the time it takes for a laser pulse to travel back and forth from the radar to the target. In order to obtain the distance of different target points, scanning or non-scanning mode can generally be used. Generally, the array single-photon detector of lidar is composed of multiple unit single-photon detectors. The disadvantage of this detector is that the response efficiency of each single-photon detector in the detector array is inconsistent, which affects the overall detection effect of the array. . Moreover, there is crosstalk between adjacent single-photon detectors, which affects the overall detection effect...

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Application Information

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IPC IPC(8): G01S17/89G01S7/4865
CPCG01S7/4865G01S17/89
Inventor 黄凯
Owner 四川科鱼光电科技有限公司
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