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Heterodyne full-coherent-terahertz three-dimensional high-resolution imaging system and method

A high-resolution, terahertz technology, applied in radio wave measurement systems, re-radiation of electromagnetic waves, instruments, etc., can solve problems such as lack of sufficient guarantee for system stability, unsuitability for practical engineering applications, complex system structures, etc., to achieve frequency The effect of suppressing problems such as shift and temperature drift, simple structure, and high imaging resolution

Pending Publication Date: 2017-07-28
JILIN UNIV
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Problems solved by technology

However, the terahertz 3D imaging they designed uses dual antennas (one antenna for transmitting signals and one antenna for receiving signals). In addition to electronic devices, optical components, such as beam splitters, are also required to build an optical path system. Therefore, the system structure is complex and the cost is high. High, difficult to integrate, not suitable for practical engineering applications; moreover, because only signal sources such as point frequency sources and linear frequency sweep sources realize heterodyne coherence, other active devices (such as power amplifiers, frequency multipliers) have not realized Coherent, so the system stability lacks sufficient guarantee

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  • Heterodyne full-coherent-terahertz three-dimensional high-resolution imaging system and method

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[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0052] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a heterodyne full-coherent-terahertz three-dimensional high-resolution imaging system and a method. The system comprises a reception-and-transmission-shared lens antenna, a terahertz linear frequency modulation wave emission module, a terahertz linear frequency modulation wave reception module, an X-Y two-dimensional scanning platform, a signal full-coherent module, a data acquiring and processing module, an image processing module and an image display unit. The system and the method of the invention are provided with a frequency on the terahertz frequency band. The overall system adopts a heterodyne full-coherent design, and a single antenna is adopted. Therefore, the structure of the system is simple and occupies less space. The planar and depth imaging resolution is high in millimeters; and the system frequency and the power stability are both advantageous.

Description

technical field [0001] The invention relates to a heterodyne fully coherent terahertz three-dimensional high-resolution imaging system and method. Background technique [0002] Jet Propulsion Laboratory, Pacific Northwest National Laboratory, FGAN-Research Institute, China Academy of Engineering Physics, Chinese Academy of Sciences Electromagnetic Radiation and Detection Technology Laboratory, The Terahertz Spectroscopy and Imaging Laboratory of the Department of Physics of Capital Normal University has invested in the research of the Terahertz 3D imaging system and has made great progress. However, the terahertz 3D imaging they designed uses dual antennas (one antenna for transmitting signals and one antenna for receiving signals). In addition to electronic devices, optical components, such as beam splitters, are also required to build an optical path system. Therefore, the system structure is complex and the cost is high. High, difficult to integrate, not suitable for pra...

Claims

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Application Information

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IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 常天英张晓璇崔洪亮
Owner JILIN UNIV
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