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Single-photon-counting compression-sampling laser three-dimensional imaging method

A technology of three-dimensional laser imaging and single photon counting, which is applied in the re-radiation of electromagnetic waves, the use of re-radiation, measurement devices, etc. requirements and other issues to achieve the effect of saving data storage space, overcoming high-speed scanning mechanisms, and reducing the amount of data collection

Inactive Publication Date: 2012-03-14
BEIHANG UNIV
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Problems solved by technology

The method of using an area array detector has the characteristics of high frame rate, wide field of view, high reliability, and small size because it does not require a mechanical scanning device. The detector is difficult to realize, the response band is limited, and the price is expensive
The method of using the traditional unit detector has the advantages of wide wavelength selection range and the ability to adapt to imaging at different wavelengths, and the unit detector is cheap and easy to implement. The main problem is that it requires a high-speed scanning mechanism with a large structural size and reliability. poor performance, and has high requirements on signal processing speed and laser repetition frequency

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  • Single-photon-counting compression-sampling laser three-dimensional imaging method

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Embodiment Construction

[0020] The invention is a non-scanning laser three-dimensional imaging method based on single-photon unit detector compression sampling, and introduces a range-gated imaging method to correct the time measurement vector obtained based on single-photon counting compression sampling, which is a new laser three-dimensional imaging method.

[0021] See Figure 1. The present invention is a single photon counting compression sampling laser three-dimensional imaging method, and the specific implementation steps are:

[0022] 1. The synchronous control source sends a trigger signal to control the digital micromirror array to transform. After a certain time delay, the pulsed laser is triggered to emit pulsed laser floodlight to illuminate the target. The light pulse reflected by the target is modulated by the digital micromirror array and then passes through the semi-reflective half-lens It is divided into two parts, one part is received by the single-photon counting avalanche photodiod...

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Abstract

The invention provides a single-photon-counting compression-sampling laser three-dimensional imaging method which is applicable to the fields of topographic mapping, information processing, digital image processing, high-precision topographic reconnaissance and the like. The method is a non-scanning laser three-dimensional imaging method on the basis of single-photon unit-detector compression sampling, a range-gated imaging method is introduced to correct a time-measuring vector obtained on the basis of single-photon-counting compression sampling, and a high-precision three-dimensional image is obtained through reconstruction by adopting a compression perceiving and restoring algorithm. The method has a better practical value and broad application prospects in the technical fields of laser imaging and digital image processing.

Description

(1) Technical field [0001] The invention relates to laser three-dimensional imaging technology, which is an active optical imaging technology capable of obtaining target space information. The single photon counting compression sampling laser three-dimensional imaging method breaks through the limitations of traditional unit detector laser three-dimensional imaging that requires a high-speed scanning mechanism, and realizes unit detector non-scanning three-dimensional imaging, which belongs to the technical field of laser imaging and digital image processing. (2) Background technology [0002] With the advancement of human science and technology and the development needs of society, applications such as high-speed aircraft navigation, all-weather target recognition and tracking, and high-precision terrain survey have put forward extremely high requirements for target detection. Compared with other active detection methods such as radio band radar and ultrasonic (sonar) detec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89
Inventor 李丽党二升吴磊王兴宾
Owner BEIHANG UNIV
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