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Terahertz wave imaging system

An imaging system, terahertz technology, applied in the field of terahertz wave imaging, can solve the problems of reducing scanning speed, system stability or reliability, etc., and achieve the effects of improving imaging ability and imaging quality, improving stability, and reducing swing range

Inactive Publication Date: 2014-05-07
CAPITAL NORMAL UNIVERSITY
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Problems solved by technology

[0004] In the existing terahertz wave scanning imaging system using linear array detectors, the linear array detectors are closely connected together. In order to increase the number of pixels in the scanning line, it is necessary to use a frame scanning plane mirror along the arrangement direction of the linear array detection units to perform large-scale scanning. The amplitude swings back and forth, and the large swing of the frame scan plane mirror reduces the scanning speed, system stability and reliability

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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 system, which includes a frame scanning plane mirror 3, a polyhedron rotating mirror 4, a terahertz lens 5, a terahertz array detector 6 and a power device;

[0028] The frame scanning plane mirror 3 is fixed in front of the measured target 1 by the power device, and the left and right symmetrical centerlines of the frame scanning plane mirror 3 and the left and right symmetrical centerlines of the object plane where the measured target 1 is located are kept in a plane, and the two are 45° apart. ° angle, the geometric center of the frame scanning plane mirror 3 is on the same horizontal line as the geometric center of the object plane where the measured target 1 is located; after starting, the power unit drives the frame scanning plane mirror 3 to periodically reciprocate around the central axi...

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Abstract

The invention discloses a terahertz wave imaging system. Large-range two-dimensional multi-column scanning on the measured objected is realized by swinging a frame scanning plane mirror in the small-angle range, so the scanning imaging speed is increased, and the practicability of the system for scanning and imaging a human body in a real-time security check system is improved; the swinging range of the frame scanning plane mirror is small, so the stability of the whole system is improved and the imaging quality is improved; the measured object is irradiated by a terahertz radiation source, so that the imaging capability and the imaging quality of the system are improved; and a data receiving processing device corrects the image by using factors 1 / cos beta, so that image distortion during acquisition is avoided and the imaging quality is improved.

Description

technical field [0001] The invention relates to the field of terahertz wave imaging, in particular to a terahertz wave scanning imaging system. Background technique [0002] Terahertz waves are between microwave and infrared, and have good penetrability to materials such as plastics, paper, textiles, and leather. The images formed have high spatial resolution and will not cause ionization damage to biological tissues. Therefore, terahertz waves The imaging system is practical in human body security inspection and can effectively complement traditional security inspection equipment. [0003] At present, limited by materials and processing technology, terahertz detectors are expensive, and focal plane imaging cannot be used in terahertz imaging, and scanning imaging is mostly used. In scanning imaging, point-by-point mechanical scanning takes too long to be applied to actual security inspection sites. Therefore, the terahertz wave scanning imaging system using a combination ...

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
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