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Multi-beam photon counting laser imaging method

A technology of laser imaging and photon counting, applied in electromagnetic wave re-radiation, radio wave measurement systems, instruments, etc., can solve the problems of high technical difficulty and high price, and achieve the goal of simplifying the detection structure, reducing equipment cost, and ensuring imaging accuracy Effect

Active Publication Date: 2019-03-26
EAST CHINA NORMAL UNIV
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Problems solved by technology

However, multi-beam photon counting laser imaging systems usually use single-photon detector arrays as the signal detection end, requiring multiple single-photon detectors, which is technically difficult and expensive

Method used

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  • Multi-beam photon counting laser imaging method

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Embodiment

[0021] Example: such as Figure 1-5 As shown, this embodiment specifically relates to a multi-beam photon counting laser imaging method, which uses a laser emitting device to generate multi-beam laser pulses with random phases and unequal repetition frequencies as scanning lasers, and uses a single-pixel single-photon detector As the detection end, the echo signals of multiple beams are simultaneously detected, and the time-of-flight of the corresponding photons is measured by the time-correlated single-photon coincidence counting module, so as to calculate the point cloud data of the imaging target distance and realize laser three-dimensional imaging.

[0022] Such as figure 1 , 2 As shown, the multi-beam photon counting laser imaging method in this embodiment includes the following steps:

[0023] (1) Make the laser emitting device emit multi-beam laser pulses, the laser emitting device includes a pulsed laser light source and a collimator, wherein the pulsed laser source ...

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Abstract

The invention discloses a multi-beam photon counting laser imaging method. The method comprises the following steps: a laser transmitting device generates multi-beam laser pulses to scan an imaging target; meanwhile, synchronous signals of the multi-beam laser pulses are transmitted to a time-dependent single-photon coincidence counting module; a single-pixel single-photon detector is used for detecting an echo signal and transmitting a counting signal to the time-dependent single-photon coincidence counting module; and the time-dependent single-photon coincidence counting module analyzes andobtains the flight time of the multi-beam laser pulses so as to solve the distance of each scanning position on the imaging target, thereby constructing a three-dimensional image of the imaging target. The method has the advantages that: multi-beam multiplexing detection can be realized at a detection end by using only one single-pixel single-photon detector by adopting multi-beam laser pulses with mutually random phases and unequal repetition frequencies as scanning laser, so that the detection structure is simplified while the imaging precision is ensured, and the equipment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of laser imaging, in particular to a multi-beam photon counting laser imaging method. Background technique [0002] Laser imaging technology has the advantages of high lateral resolution, small ranging error, fast imaging speed, and small volume and weight. At present, laser imaging based on time-of-flight is a relatively mature technology and has a wide range of applications in various fields. Multi-beam photon Counting laser imaging is one of the important branches. However, multi-beam photon counting laser imaging systems usually use single-photon detector arrays as the signal detection end, requiring multiple single-photon detectors, which is technically difficult and expensive. Contents of the invention [0003] The purpose of the present invention is to provide a multi-beam photon counting laser imaging method according to the above-mentioned deficiencies in the prior art, by using multi-beam laser ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 吴光郑天翔申光跃李召辉庞程凯伍狄施皓天杨雷
Owner EAST CHINA NORMAL UNIV
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