Terahertz imaging system and terahertz security 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 high energy consumption, and achieves reduced ionization effects, low radiation, and low energy consumption. Effect

Active Publication Date: 2017-01-25
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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  • Terahertz imaging system and terahertz security device

Examples

Experimental program
Comparison scheme
Effect test

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 prohibited from being carried in the object to be tested.

[0061] The ala...

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Abstract

The invention is applicable to the technical field of security check and provides a terahertz imaging system and a terahertz security device. The terahertz imaging system comprises a terahertz radiation module, an optical chopper, an imaging objective lens, a light-sensitive surface, a terahertz detection module and a signal processing module; the optical chopper is used for modulating terahertz wave radiated by the terahertz radiation module into terahertz wave with default frequency and radiating the terahertz wave to a to-be-detected object in a covering manner; the imaging objective lens is used for focusing the terahertz wave carried with complex dielectric function information of the to-be-detected object on a focal plane of an image space; the minimal edge length of the light-sensitive surface is greater than or equal to the maximum edge length of an imaging region of the imaging objective lens, and the terahertz detection module is used for converting the terahertz wave carried with the complex dielectric function information into an analog current signal; the signal processing module is connected with the terahertz detection module. By the arrangement, nondestructive detection can be performed on human body or biological tissue, radiation injury can be reduced, complete detection data of the to-be-detected object can be acquired by one radiation, detection efficiency is improved, and high-risk items of metal, poison, explosive and the like can be effectively identified.

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 order. [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, and ...

Claims

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Application Information

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Patent Type & Authority Applications(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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