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Millimetre and sub-millimetre imaging device

An imaging device, sub-millimeter technology, applied in measuring devices, geological exploration using millimeter waves, optical-based geological exploration, etc., can solve problems such as antenna size reduction

Inactive Publication Date: 2006-12-06
科学技术设备委员会
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even at 0.1THz, the antenna length is only 1mm, and the size of the antenna will decrease as the frequency increases

Method used

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  • Millimetre and sub-millimetre imaging device
  • Millimetre and sub-millimetre imaging device
  • Millimetre and sub-millimetre imaging device

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Embodiment Construction

[0013] figure 1 The terahertz camera shown in generally comprises a sample stage 1, a fixed objective lens 2, and multiple detectors in the form of an antenna 3 located on the focal plane of the objective lens 2 ( figure 1 only one is shown). Each antenna 3 is connected via a respective waveguide 4 to conventional mixing circuitry 5 and to readout electronics (not shown) including but not limited to a data analysis system. In addition, each antenna 3 is equipped with a retroreflector 6 facing its aperture, which can reflect rays of optical wavelength. A beam splitter 7 is preferably mounted between the objective 2 and the array of antennas 3, preferably at an angle of 45°, and is arranged to direct light from the optical source 8 to retroreflectors mounted on the respective antennas device 6. Accompanying the optical light source 8 is an optical imaging device 9 , such as a CCD camera, for detecting and recording the light reflected back from the retroreflector 6 .

[0014...

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PUM

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Abstract

The terahertz camera has a fixed objective lens (2) and a plurality of detectors (3) positioned at the focal plane of the objective lens (2). Each of the detectors (3) is mounted on a movable support (10) so that the antenna is capable of movement across the focal plane of the objective lens (2) and is provided with a flexible waveguide (4) for connecting the output of the detector (3) with signal processing means. Each detector (3) is also provided with a retroreflector (6) which is reflective at frequencies other than terahertz frequencies. During use of the camera, the retroreflector (6) of each detector (3) is illuminated at non-terahertz frequencies so that the spatial position of each detector (3) and hence the spatial source of signals generated by the detector can be accurately identified. The terahertz camera is particularly suited for use in security installations and in chemical and food processing industries.

Description

technical field [0001] The present invention relates to an imaging device and in particular, but not exclusively, to a millimeter and submillimeter wavelength scanning camera capable of operating at room temperature. Background technique [0002] Submillimeter radiation (also known as terahertz radiation, which falls between microwaves and infrared light) is known to penetrate paper and cloth. This wavelength range has therefore been identified as a powerful tool against the growing threat of acts of terrorism because it can be used to find concealed metallic and non-metallic weapons in much the same way that x-rays are currently used in airport security . We also know that terahertz rays can be used in astronomical research and in spectroscopic analysis of biological matter because different biomolecules absorb terahertz rays at different frequencies. Its ability to penetrate the uppermost skin layer also points to the possibility of using terahertz rays in the diagnosis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V8/00
CPCG01V8/005
Inventor 克里斯·曼恩乔纳森·詹姆士
Owner 科学技术设备委员会
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