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System for measuring Terahertz reflectance of stealth material

A technology of stealth material and measurement system, which is applied in measurement devices, analysis materials, material analysis by optical means, etc., can solve problems such as terahertz wave reflectivity measurement, and achieve the effect of guaranteeing measurement accuracy and improving the convergence effect.

Active Publication Date: 2013-10-02
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming to solve the problem of terahertz wave reflectivity measurement of stealth materials

Method used

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  • System for measuring Terahertz reflectance of stealth material
  • System for measuring Terahertz reflectance of stealth material
  • System for measuring Terahertz reflectance of stealth material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The FIRL 100 continuous terahertz laser was used as the terahertz light source to test the 2.52THz reflectance of the carbonyl iron-resin stealth composite samples coated with different thicknesses on the surface of the Al disk.

[0030] The terahertz laser is divided into two beams after passing through the terahertz beam splitter. One beam is the transmitted light, which is incident on the surface of the stealth material sample along 45°, and the reflected wave is collected by the off-axis parabolic mirror and focused on the power meter; the other One beam is reflected light, which is picked up by a terahertz detector.

[0031] The laser light emitted from the HeNe laser is reflected by the reflector and hits the terahertz beam splitter to be divided into two beams. One beam is the transmitted light, which is irradiated on the baffle; the other beam is the reflected light, which enters the terahertz laser and is transmitted The lens inside the laser returns to the ori...

Embodiment 2

[0034] Using the FIRL 100 continuous terahertz laser as the terahertz light source, the 2.52THz reflectance of the FeSi-resin stealth composite material samples coated with different thicknesses on the surface of polyethylene disks was tested.

[0035] The terahertz laser is divided into two beams after passing through the terahertz beam splitter. One beam is the transmitted light, which is incident on the surface of the stealth material sample along 45°, and the reflected wave is collected by the off-axis parabolic mirror and focused on the power meter; the other One beam is reflected light, which is picked up by a terahertz detector.

[0036] The laser light emitted from the HeNe laser is reflected by the reflector and hits the terahertz beam splitter to be divided into two beams. One beam is the transmitted light, which is irradiated on the baffle; the other beam is the reflected light, which enters the terahertz laser and is transmitted The lens inside the laser returns to...

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Abstract

The invention discloses a system for measuring Terahertz reflectance of a stealth material. The system comprises a sample table for accommodating a stealth material to be detected, a Terahertz laser, a beam splitter for splitting Terahertz light, a Terahertz power meter, a Terahertz detector, a reflector for reflecting parallel to the Terahertz light, an off-axis parabolic mirror for focusing the reflected Terahertz light to the stealth material to be detected, and a HeNe laser for performing collimation and auxiliary observation on Terahertz laser. According to the system, the Terahertz reflectance of the stealth material can be accurately measured.

Description

[0001] technical field [0002] The invention belongs to the technical field of terahertz, and in particular relates to a measurement system for terahertz reflectivity of stealth materials. Background technique [0003] There are two main technical means for the target to achieve the purpose of stealth: one is to adopt the stealth body design, so that the echo power of the electromagnetic wave emitted by the radar is reflected to the radar receiving antenna by the target to the minimum; the other is to coat the outer surface of the aircraft with a A layer of material that absorbs radar wave energy. Generally, these two technical means are combined to reduce the radar cross section (RCS) of the target. If the energy of the radar echo signal is less than the sensitivity of the radar receiver, the radar cannot detect the target, or the aircraft achieves stealth. At present, there are two obvious trends in the development of aircraft stealth technology: one is to develop high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
Inventor 周逊郭超罗振飞李赜宇王度张庆伟
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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