A terahertz imaging system and a terahertz security inspection device

A terahertz imaging and terahertz technology, which is applied in the field of terahertz imaging systems and terahertz security inspection devices, can solve the problems of slow detection speed, poor transmittance, and large radiation, and achieve reduced ionization effects, low radiation, and high detection efficiency Effect

Active Publication Date: 2019-05-03
SHENZHEN CCT THZ TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a terahertz imaging system and a terahertz security inspection device, aiming to solve the problem of large radiation and low energy consumption in most existing security inspection technologies that use X-ray detectors to perform security inspections on human bodies or luggage. High, poor transmittance and slow detection speed

Method used

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  • A terahertz imaging system and a terahertz security inspection device
  • A terahertz imaging system and a terahertz security inspection device
  • A terahertz imaging system and a terahertz security inspection device

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Embodiment 1

[0022] Such as figure 1 As shown, the terahertz imaging system provided by this embodiment includes a terahertz radiation module 10, an optical chopper 20, an imaging objective lens 30, a terahertz detection module 40, and a signal processing module 50, and the direction of the arrow in the figure indicates the terahertz wave Direction of transmission or direction of signal flow.

[0023] The terahertz radiation module 10 is used for radiating terahertz waves.

[0024] In a specific application, the wavelength range of the terahertz wave radiated by the terahertz radiation module 10 is 3 mm-30 μm.

[0025] In an embodiment, the terahertz radiation module 10 may be a titanium sapphire femtosecond laser or a Gunn diode laser.

[0026] The optical chopper 20 is located on the radiation surface of the terahertz radiation module 10 , and is used for modulating the terahertz wave radiated by the terahertz radiation module 10 into a terahertz wave of a preset frequency and radiatin...

Embodiment 2

[0044] Such as figure 2 As shown, the terahertz imaging system provided by this embodiment further includes a focusing lens 60, a display module 70 and a storage module 80 on the basis of the first embodiment, and the signal processing module 50 includes a signal amplification unit 51, an analog-to-digital conversion unit 52 and Image processing unit 53 .

[0045] The focusing lens 60 is arranged on the radiation surface of the optical chopper 20 and is used for focusing the terahertz wave radiated by the optical chopper 20 onto the object 01 to be measured.

[0046] In a specific application, the focusing lens 60 is actually a convex lens, which plays a role of converging light.

[0047] The display module 70 is connected with the signal processing module 50 for processing the digital image data.

[0048] In a specific application, the display module 70 is a liquid crystal or LED display.

[0049] The storage module 80 is connected with the signal processing module 50 and...

Embodiment 3

[0058] The terahertz security inspection device provided in this embodiment includes a main body of the security inspection device, the above-mentioned terahertz imaging system (not shown in the figure) and an alarm.

[0059] In a specific application, the main body of the security inspection device is a human body security inspection door or a luggage security inspection machine.

[0060] In a specific application, the terahertz imaging system is set inside the main body of the security inspection device and is mechanically connected to it, and performs transmission radiation on the object to be detected passing through the main body of the security inspection device to obtain digital image data of the object to be detected. The display of the terahertz imaging system The module displays the digital image data of the object to be tested for the relevant staff to check whether there are prohibited items in the object to be tested.

[0061] The alarm is set on the main body of ...

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PUM

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Abstract

A terahertz imaging system and a terahertz security check device. The terahertz imaging system comprises: a terahertz radiation module (10); an optical chopper (20), which modulates a terahertz wave radiated from the terahertz radiation module (10) into a terahertz wave of a preset frequency and radiates an object to be inspected (01) with the terahertz wave in a covering manner; an imaging objective lens (30), which focuses a terahertz wave carrying information of a complex dielectric function of the object to be inspected (01) on an image-side focal plane of the imaging objective lens (30); a terahertz detection module (40), which has a photosensitive face, the minimum edge length of the photosensitive face being greater than or equal to the maximum edge length of an imaging area of the imaging objective lens (30), and converts the terahertz wave carrying the information of the complex dielectric function into an analog current signal; and a signal processing module (50) connected to the terahertz detection module (40). The terahertz imaging system and the terahertz security check device can perform non-destructive inspection on the human body or biological tissue to reduce radiation damage, can obtain complete inspection data of the object to be inspected (01) by radiation once, has high detection efficiency, and can effectively identify metal, drugs, explosives, and other high-risk items.

Description

technical field [0001] The invention belongs to the technical field of security inspection, and in particular relates to a terahertz imaging system and a terahertz security inspection device. Background technique [0002] With the continuous development of public transportation, the implementation of security inspection systems in crowded places such as subway stations, airports, and railway stations, to detect the safety of people's carry-on luggage has become an important means of ensuring good social security. [0003] However, most of the existing security inspection technologies use X-ray detectors to conduct security inspections on human bodies or luggage, which have high energy consumption, high radiation, and great harm to the human body, poor transmittance, and cannot accurately identify metals, drugs, Explosives and other high-risk items; in addition, the imaging device in the X-ray detector is small in size, and can only scan a part of the human body or luggage, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V8/10
CPCG01V8/10
Inventor 谭易东潘奕李辰丁庆
Owner SHENZHEN CCT THZ TECH CO LTD
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