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Infrared stealth superstructure compatible with thermally induced variable emissivity and frequency selective heat dissipation

A frequency-selective, superstructure technology, applied in the field of infrared stealth, can solve the problems of poor thermal stability, lack of emissivity modulation capability, etc., and achieve the effect of wide emissivity regulation range

Active Publication Date: 2021-10-22
TSINGHUA UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the two problems of poor thermal stability and lack of emissivity modulation ability of traditional low-emissivity materials, combining metal resonant metamaterials and VO 2 Equal phase change materials, by designing the material composition of each dielectric layer of the metamaterial and controlling the structural size, an infrared stealth metasurface device compatible with thermally variable emissivity and frequency selective thermal emission is provided

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  • Infrared stealth superstructure compatible with thermally induced variable emissivity and frequency selective heat dissipation
  • Infrared stealth superstructure compatible with thermally induced variable emissivity and frequency selective heat dissipation
  • Infrared stealth superstructure compatible with thermally induced variable emissivity and frequency selective heat dissipation

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below with reference to the drawings and embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0019] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways than described here. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.

[0020] The infrared stealth superstructure of the embodiment of the present invention has both thermally variable emissivity and frequency selective thermal emission performance, and its structure can be found in figure...

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Abstract

The invention discloses an infrared stealth superstructure compatible with thermally induced variable emissivity and frequency selective heat dissipation. The infrared stealth superstructure comprises a plurality of electromagnetic resonance units which are arranged on a substrate in a periodic arrangement mode, and each electromagnetic resonance unit comprises an emissivity regulation and control layer and a dielectric layer which are sequentially stacked from bottom to top, and a pluraltiy of metal columns which are periodically arranged on the dielectric layer; the emissivity regulation and control layer is prepared by embedding a phase change material into a metal layer stacked on the substrate. According to the invention, the emissivity can be modulated in atmospheric transmission windows of 3-5 microns and 8-14 microns, meanwhile, the thermal radiation of 5-8 microns of an atmospheric absorption wave band is enhanced to actively dissipate heat, and the infrared stealth superstructure has a relatively wide emissivity regulation and control range and can adapt to various infrared stealth scenes.

Description

technical field [0001] The invention belongs to the technical field of infrared stealth, and in particular relates to an infrared stealth superstructure compatible with thermally variable emissivity and frequency selective heat dissipation. Background technique [0002] Most of the biological and working instruments, the surface temperature is between 20-900 ℃, according to the Wien displacement law (λT ​​= b, where λ is the wavelength, T is the temperature, b is the Wien constant, b = 0.002897m ·K), the heat radiation peak will be distributed in 3-14μm. However, the 3-5μm and 8-14μm bands are atmospheric transmission windows, and the infrared radiation in the window can easily pass through the atmosphere and be detected by thermal cameras. When there is a difference in the radiation intensity between the target and the surrounding environment, the target can be identified in thermal imaging through the radiation contrast. How to fuse the target with the surrounding enviro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/22G02B5/20G02B1/00
CPCG02B5/22G02B5/208G02B1/002G02B1/00
Inventor 方菲赵越超
Owner TSINGHUA UNIV
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