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Terahertz (THz) video camera for channel security check

A camera and roadway technology, which is applied in the field of roadway security inspection THz cameras, can solve the problems of difficult practicality and long imaging time, and achieve the effects of improving THz imaging, increasing output energy, and long life

Inactive Publication Date: 2012-02-15
THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the THz sensor used for photography uses a point sensor for scanning time-domain imaging, the time to scan a frame of image imaging is too long to be practical; it is suitable to use a fast-imaging THz area sensor for long-term remote road security checks

Method used

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  • Terahertz (THz) video camera for channel security check
  • Terahertz (THz) video camera for channel security check
  • Terahertz (THz) video camera for channel security check

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Such as figure 1 As shown, the road safety inspection THz camera of the present invention is composed of a Stirling refrigeration thermoelectric surface array THz camera 100 and a solid THz remote radiation source 200 of a semiconductor laser optically pumped lithium niobate crystal, and the Stirling refrigeration thermoelectric surface array THz camera 100 and the solid THz remote radiation source 200 of the semiconductor laser light-pumped lithium niobate crystal are respectively installed on a pan-tilt 600 through angle-adjustable brackets 400 and 500, and the THz rays of the solid THz remote radiation source 200 of the semiconductor laser light-pumped lithium niobate crystal The emission direction 200a intersects with the imaging direction 100a of the Stirling refrigeration thermoelectric area THz camera 100 at the roadside security inspection position, and the reflective THz vision-assisted imaging is performed on the people and objects 300 being inspected on the ro...

Embodiment 2

[0055] see figure 2 , the road safety inspection THz camera of the present invention is composed of a Stirling refrigeration thermoelectric surface array THz camera 100 and a solid THz remote radiation source 200 of a semiconductor laser optically pumped lithium niobate crystal, wherein the Stirling refrigeration thermoelectric surface array THz camera 100 and The solid THz remote radiation source 200 of the semiconductor laser optical pump lithium niobate crystal is respectively installed at half a person's height on both sides of the roadside security check position through the fixed brackets 710 and 720, and the Stirling refrigeration thermoelectric area THz camera 100 and the semiconductor laser The optical axis of the solid-state THz remote radiation source 200 of optically pumped lithium niobate crystals is parallel at half a human height.

[0056] The THz ray emission direction 200a of the solid THz remote radiation source 200 of the semiconductor laser optical pump li...

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Abstract

The invention relates to a terahertz (THz) video camera for channel security check, which comprises a Stirling refrigeration thermoelectric planar array THz camera and a solid THz remote radiation source of which the section of a semiconductor laser optical pump is a lithium niobate crystal bar, wherein the Stirling refrigeration thermoelectric planar array THz camera and the solid THz remote radiation source of which the section of the semiconductor laser optical pump is the lithium niobate crystal bar are used for aiming at a channel to perform reflection-type THz vision-assistance camera shooting or shooting oppositely by aiming at the channel to perform THz camera shooting. The THz video camera for the channel security check has the performances of improving the emergence energy of THz radials and the THz imaging quality by a fully tap cooperation potential. The THz video camera for realizing real-time channel security check by aiming at the specific application of the channel security check and the THz perspective camera shooting feature can be powered up in the field to work for a long time, is convenient in use, has long service life and can achieve the goals of the invention.

Description

technical field [0001] The present invention relates to the technical field of radiation imaging and security inspection, in particular to a road security inspection THz camera with a solid THz generator plus Stirling thermoelectric array. The strong THz rays generated by the difference frequency between the lithium niobate crystal rod and its Raman scattered light irradiate the roadway, and the thermoelectric thin film area array cooled by the Stirling machine is used for THz band imaging. Background technique [0002] Most of the existing terahertz imaging technologies use femtosecond lasers to irradiate nonlinear crystals such as zinc telluride to generate pulsed THz rays for two-dimensional scanning in the time domain, and the nonlinear crystals such as zinc telluride receive scanned THz rays for photoelectric imaging. This method is available for sale by converting and obtaining terahertz imaging signals, but because the point pulses of about tens of times per second ca...

Claims

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Application Information

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IPC IPC(8): G01V8/10G03B15/05
Inventor 朱弘吴晶邵杰
Owner THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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