A total reflection terahertz human body security imaging device
A human body security inspection and imaging device technology, applied in the terahertz field, can solve problems such as poor imaging quality and long imaging time
Active Publication Date: 2020-10-30
欧必翼太赫兹科技(北京)有限公司
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Problems solved by technology
[0004] In the existing terahertz security imaging system, the two-dimensional movement of the reflective surface is used to realize the scanning and imaging of the imaged human body, the imaging time is long, and the imaging quality is poor
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[0048]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0049] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of practice in sequences...
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Embodiments of the invention provide a total reflection type terahertz human body security imaging device, comprising a polyhedral scanning mirror, a terahertz focusing mirror group, and a terahertz array detector, wherein the polyhedral scanning mirror rotates steadily at a high speed around a central axis to make N plane mirrors of the polyhedral scanning mirror scan an imaged target in the vertical direction sequentially as scanning mirrors, so as to reflect a terahertz wave radiated or reflected by the imaged target onto the terahertz focusing mirror group; the terahertz wave reflected bythe polyhedral scanning mirror of the terahertz focusing mirror group is imaged onto the terahertz array detector; and the terahertz array detector converts the terahertz wave into a voltage signal, and images based on the voltage signal to complete an array scan of the imaged object in the vertical direction. The total reflection type terahertz human body security imaging device can realize the scanning of the imaged object in the vertical direction by the high-speed and stable rotation of the polyhedral scanning mirror around the central axis, and has simple and compact structure, and high imaging speed.
Description
technical field [0001] Embodiments of the present invention relate to the field of terahertz technology, and in particular to a total reflection terahertz human body security imaging device. Background technique [0002] The wavelength of terahertz wave is between the wavelength of infrared ray and the wavelength of millimeter wave. It has good penetration to materials such as textiles and leather, and the resulting image has higher spatial resolution; it is several times lower than X-ray energy. Therefore, terahertz waves are widely used in security inspections, such as customs inspections, inspections in public places such as airports and stations. [0003] In the prior art, high-sensitivity array detectors based on terahertz bands are expensive, and scanning imaging is mostly used in terahertz imaging. For example, in the non-contact, large field of view, fast, and high-resolution human terahertz scanning imaging that meets the needs of public places such as airports and...
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IPC IPC(8): G01V8/10
CPCG01V8/10
Inventor 张建新张殿坤牛海亮
Owner 欧必翼太赫兹科技(北京)有限公司