Terahertz human body security check imaging device
A technology for human body security inspection and imaging device, applied in the terahertz field, can solve the problems of poor imaging quality and long imaging time, and achieve the effects of prolonging the service life, preventing the entry of dust and stray light, and improving the cleanliness and sensitivity
Inactive Publication Date: 2018-11-30
欧必翼太赫兹科技(北京)有限公司
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[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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[0035] 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.
[0036] 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 sequence...
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The embodiment of the invention provides a terahertz human body security check imaging device, which comprises a polyhedral scanning mirror, a terahertz lens and a terahertz array detector, wherein the polyhedral scanning mirror rotates stably around a central axis at a high speed, so that N planar mirrors of the polyhedral scanning mirror are enabled to be used as scanning mirrors to scan an imaged target in sequence, and then terahertz waves radiated or reflected by the imaged target are reflected onto the terahertz lens; the terahertz waves reflected by the terahertz lens and the polyhedralscanning mirror are imaged onto the terahertz array detector; and the terahertz array detector converts the terahertz waves into voltage signals and makes an image according to the voltage signals, so as to complete array scanning of the imaged object in the vertical direction. According to the terahertz human body security check imaging device disclosed by the invention, the polyhedral scanningmirror rotates stably around the central axis at the high speed to scan the imaged target in the vertical direction; and the terahertz human body security check imaging device is simple and compact instructure and high in imaging speed.
Description
technical field [0001] Embodiments of the present invention relate to the field of terahertz technology, and in particular to a 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 stations, scanni...
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IPC IPC(8): G01V8/14
CPCG01V8/14
Inventor 张建新倪会超李柏寒龚彦如
Owner 欧必翼太赫兹科技(北京)有限公司