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Terahertz (THz) wave imaging device

A technology of terahertz wave imaging and terahertz lens, applied in the field of terahertz wave scanning imaging, can solve the problems of increasing the complexity of imaging devices, reducing scanning speed and imaging quality, so as to improve imaging quality and imaging speed, and increase real-time performance , cost reduction effect

Inactive Publication Date: 2014-05-07
CAPITAL NORMAL UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the existing terahertz wave scanning imaging device using a linear array detector, in order to increase the number of pixels in the alignment direction of the linear array detector, it is necessary to use a frame scanning plane mirror to swing back and forth along the alignment direction of the linear array detection unit Scanning, the introduction of frame scanning plane mirror reduces the scanning speed and imaging quality, and also increases the complexity of the imaging device

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  • Terahertz (THz) wave imaging device
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  • Terahertz (THz) wave imaging device

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Embodiment Construction

[0026] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] The present invention provides a terahertz wave imaging device, which is used for terahertz imaging security inspection of the human body, such as figure 1 As shown, the device includes a polygonal rotating mirror 3, a terahertz lens 4 and a terahertz linear array detector;

[0028] The terahertz waves radiated or reflected by the measured target 1 are reflected by the polyhedral rotating mirror 3 to the terahertz lens 4, and then collected by the terahertz linear array detector after being converged by the terahertz lens 4;

[0029] In order to reduce the center of gravity of the scanning imaging device and improve the stability of the device, the present invention uses a mirror 5 at an angle of 45° to the measured object 1 to change the direction of the terahertz wave transmitted by the terahertz lens 4 by 90°, so that the The Hertz linear array ...

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Abstract

The invention discloses a terahertz (THz) wave imaging device, comprising a polyhedral rotating mirror, a THz lens and a detection unit. Plane mirrors are arranged on the side surfaces of the polyhedral rotating mirror in different angles, so that the scanning and imaging column number of a detected target is increased, the imaging quality and speed are improved, and meanwhile, the system is more real-time and practical in body scanning and imaging for a security check. The two-dimensional multi-column scanning of the detected target is implemented in a large range only by driving the polyhedral rotating mirror to rotate, so that the structure of a scanning and imaging device is simplified and the cost is lowered.

Description

technical field [0001] The present invention relates to terahertz wave scanning imaging technology, in particular, the present invention relates to a human body terahertz wave scanning imaging device with high frame rate and large field of view, which combines wave scanning and line array detectors. Background technique [0002] Terahertz waves are between microwave and infrared, and have good penetration on materials such as plastics, paper, textiles, and leather. They are shorter than microwave wavelengths, and the resulting images have higher spatial resolution; they have higher spatial resolution than X-ray energy. It is several orders of magnitude lower and will not cause ionization damage to biological tissues. Therefore, terahertz imaging devices are practical in human security inspection and can effectively complement traditional security inspection equipment. [0003] At present, limited by materials and processing techniques, detectors in the terahertz band are exp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V8/10G01N21/17
Inventor 邓朝张存林梁来顺张亮亮
Owner CAPITAL NORMAL UNIVERSITY