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Non-scanning photon counting non-visual-field three-dimensional imaging apparatus and method

A technology of photon counting and three-dimensional imaging, which is applied in the field of non-line-of-sight three-dimensional imaging technology, can solve problems such as the inability to image non-line-of-sight scenes, and achieve the effect of increasing the frame rate

Active Publication Date: 2017-05-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing technology cannot image the non-line-of-sight scene, thereby providing a non-scanning photon counting non-line-of-sight three-dimensional imaging device and method

Method used

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  • Non-scanning photon counting non-visual-field three-dimensional imaging apparatus and method
  • Non-scanning photon counting non-visual-field three-dimensional imaging apparatus and method

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specific Embodiment approach 1

[0039] Specific implementation mode one: combine figure 2 This embodiment is described in detail. A non-scanning photon counting non-sight three-dimensional imaging device described in this embodiment includes a pulsed laser 1, a beam shaping system 2, a receiving optical system 3, a single photon detector array 5, a multi-channel Time-correlated single photon counter 6 and computer 7;

[0040] The pulsed laser 1 emits laser light and sends a time signal to the multi-channel time-correlated single photon counter 6. The laser emitted by the pulsed laser 1 is shaped by the beam shaping system 2 and then incident on the wall. The laser scattered by the wall is reflected by the target and then incident on the wall again. body, the receiving optical system 3 receives the laser light returned by the wall, and the laser light is incident to the single photon detector array 5, and the multiple output terminals of the single photon detector array 5 are connected with the multiple inpu...

specific Embodiment approach 2

[0042] Embodiment 2: Based on the imaging method of a non-scanning photon counting non-sight three-dimensional imaging device described in Embodiment 1, the method includes the following steps:

[0043] The pulse laser 1 emits laser light and gives a time signal to the multi-channel time-correlated single photon counter 6;

[0044] Using a beam shaping system 2 to shape the laser light emitted by the pulse laser 1;

[0045] The shaped laser is incident on the wall, and the laser scattered by the wall is reflected by the target and then incident on the wall again;

[0046] The receiving optical system 3 receives the laser light returned by the wall, and makes the image square field of view of the receiving optical system 3 the same as the field of view of the single photon detector array 5;

[0047] The multi-channel time-correlated single photon counter 6 calculates the photon flight time of the photon incident to the single photon detector array 5 from the pulse laser 1 to t...

specific Embodiment approach 3

[0050] Specific implementation mode three: combination image 3 This embodiment is described in detail. This embodiment is a further description of a non-scanning photon counting non-sight three-dimensional imaging method described in the second specific embodiment. The three-dimensional image of the target is reconstructed to obtain a three-dimensional image, which specifically includes the following steps:

[0051] Back projection:

[0052] To establish a model, the pulse laser 1 is located at point L, the single-photon detector array 5 is located at point D, and the laser light emitted by pulse laser 1 is incident on point S on the wall, and I i is the i-th image point;

[0053] Back-project each time photon map into three-dimensional space, and the value of each moment in the time photon counting map corresponds to an ellipsoid in three-dimensional space, the ellipsoid takes the source point and the image point as the focus, and the The space coordinates (x, y, z) satis...

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Abstract

The invention relates to laser imaging technologies, in particular to a non-scanning photon counting non-visual-field three-dimensional imaging apparatus and method and is intended to solve the problem that the prior art is unable to image a non-visual-field scene. A pulse laser emits laser and gives a time signal to a multi-channel time-dependent single-photon counter; the reformed laser enters a wall, the laser scattered by the wall is reflected by a target and enters again the wall; the laser returned by the wall is received by a receiving optical system, an image side of the receiving optical system is given as many visual fields as a single-photon detector array; the multi-channel time-dependent single-photon counter calculates photon flight time taken by a photo entering the single-photon detector array from the pulse laser back to the single-photon detector array, so as to obtain time-photon counting diaphragms; a computer reconstructs a three-dimensional image of a target according to multiple time-photon counting diaphragms to obtain a three-dimensional image. The non-scanning photon counting non-visual-field three-dimensional imaging apparatus and method are applicable to three-dimensional imaging of a non-visual-field target.

Description

technical field [0001] The invention relates to a laser imaging technology, in particular to a non-visual three-dimensional imaging technology. Background technique [0002] Laser imaging technology has the advantages of high lateral resolution, small ranging error, fast imaging speed, and small volume and weight, so it is widely used in civilian and military fields to directly obtain the intensity information and three-dimensional distance information of the target. Realize the identification of the target. With the development of device technology, especially the emergence of high-sensitivity, high-time-resolution single-photon detectors, laser imaging technology is not limited to the detection of conventional targets, but has also been applied to the detection of targets under special conditions or special environments. Detection and recognition, especially the imaging of objects in non-line-of-sight scenes, is gaining more and more attention. [0003] The so-called non...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89G01V8/12
CPCG01S17/89G01V8/12
Inventor 靳辰飞赵远谢佳衡张思琦张勇张子静刘丽萍李家欢
Owner HARBIN INST OF TECH
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