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Terahertz light beam expansion uniformizing device

A homogenization and terahertz technology, applied in the field of terahertz imaging, can solve problems such as unfavorable focal plane detector calibration and failure to achieve flat-top energy distribution

Inactive Publication Date: 2016-08-31
YANTAI RAYTRON TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the existing technology can basically meet the requirements of obtaining a large-area uniform terahertz beam, it still cannot achieve a more uniform flat-top energy distribution, which is not conducive to the calibration of focal plane detectors.

Method used

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Embodiment Construction

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0020] Examples, see figure 1 and figure 2 As shown, the present invention provides a terahertz optical beam expansion and homogenization device, the front end of the beam expansion and homogenization device is provided with a terahertz light source 1, and the beam expansion and homogenization device includes a beam expander 2, an integrator 3 and The imaging focal plane 4, the beam expander 2 is arranged between the terahertz light source 1 and the integrator 3, the focal plane is arranged at the rear end of the integrator 3, the beam expander 2 includes a convex lens I5 and a convex lens II6, so The convex lens I5 is arranged between the convex lens II6 and the terahertz light source 1, the back focus of the con...

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Abstract

The invention relates to a terahertz light beam expansion uniformizing device. The front end of the uniformizing device is provided with a terahertz light source, and the uniformizing device further comprises a light expander, an integrator and an imaging focal plane, the beam expander is arranged between the terahertz light source and the integrator, the focal plane is arranged behind the integrator, the light expander comprises a second convex lens and a first convex lens between the second convex lens and the terahertz light source, the integrator comprises two lens arrays, a lens and a condensing lens, the two lens arrays are fixedly arranged in the front and back sides of the lens respectively, the lens is arranged in front of the condensing lens, the imaging focal plane is arranged at the real focal point of the condensing lens, and the photocenters of the first and second convex lenses and the condensing lens and the center of the terahertz light source are in the same straight line. The terahertz light beam expansion uniformizing device is simple in structure, and can be used to obtain large-area flat terahertz light spots with uniform energy distribution.

Description

technical field [0001] The invention belongs to the technical field of terahertz imaging, and in particular relates to a terahertz beam expanding and homogenizing device. Background technique [0002] Terahertz imaging technology is a technology that uses terahertz light to irradiate the measured object, and collects the transmission or reflection information of the object at the focal plane to form an image. Terahertz imaging is currently widely used in non-destructive testing, security inspection, and biomedical fields. [0003] Choosing a suitable terahertz light source is a key technology of the imaging system. Compared with scanning imaging using point light sources, using terahertz area array imaging has the advantages of more pixels, fast imaging speed, and real-time imaging. The surface light source required by the area array imaging system and the responsivity calibration of the area array detector require the use of a terahertz beam with uniform energy distributi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09
CPCG02B27/0927G02B27/0938G02B27/0955G02B27/0961
Inventor 王亮王鹏王宏臣陈文礼董珊
Owner YANTAI RAYTRON TECH
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