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Metamaterial optical window and preparation method thereof

An optical window and metamaterial technology, applied in the field of metamaterial optical window and its preparation, can solve the problem that the wave absorber cannot have microwave broadband absorption visible and infrared band optical high transparency environment durability at the same time, and achieve excellent The effect of firmness

Pending Publication Date: 2021-10-19
杭州光学精密机械研究所
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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a metamaterial optical window and its preparation method, aiming at solving the problem that existing metamaterial wave absorbers cannot simultaneously have microwave broadband absorption, visible and infrared band optical high issues of permeability and environmental durability

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  • Metamaterial optical window and preparation method thereof
  • Metamaterial optical window and preparation method thereof
  • Metamaterial optical window and preparation method thereof

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Embodiment 1

[0045] A metamaterial optical window, such as Figure 1-Figure 4 As shown, it includes a plurality of structural units arranged periodically, and each structural unit is composed of a transparent dielectric substrate 2, a grid transparent resonant structure 1 embedded in the deep surface of the transparent dielectric substrate 2, and a grid transparent resonant structure embedded in the transparent dielectric substrate 2. It is composed of a transparent metal grid layer 3 on the lower surface of the dielectric substrate 2 . The thickness of the transparent dielectric substrate 2 is h, and the schematic diagram of the periodic grid transparent resonant structure 1 is as follows image 3 As shown, the grid transparent resonant structure 1 in a single structural unit is a square, such as Figure 4 As shown, let the periodic side length of the grid transparent resonant structure 1 be P, and the length and width of the cross ring 11 be l respectively 1 and d 1 , the length and w...

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Abstract

The invention discloses a metamaterial optical window and a preparation method thereof. The metamaterial optical window comprises a plurality of structure units which are periodically arranged. Each structure unit is composed of a transparent dielectric substrate, a mesh transparent resonance structure embedded in the upper deep surface of the transparent dielectric substrate, and a transparent metal mesh layer embedded in the lower deep surface of the transparent dielectric substrate. The mesh transparent resonance structure and the transparent metal mesh layer are both embedded in the deep surface of the optical window body (transparent dielectric substrate), so that the structure is difficult to rub off in practical application, and has excellent harsh environment applicability such as firmness, wear resistance, durability, laser damage resistance and thermal shock resistance; and the embedded grid transparent resonance structure can also realize high permeability in visible and middle and far infrared bands. The metamaterial optical window provided by the invention can realize broadband absorption at a radar microwave band of 1-18 GHz, and the absorption rate can reach 90% or above.

Description

technical field [0001] The invention relates to the technical field of metamaterial wave absorbers, in particular to a metamaterial optical window and a preparation method thereof. Background technique [0002] Electromagnetic pollution caused by microwave and radio technology not only interferes with precision electronic instruments, but also has a non-negligible negative effect on human health. Electromagnetic shielding technology can be used to eliminate these negative effects. In many electromagnetic shielding fields, electromagnetic shielding materials not only need excellent electromagnetic shielding performance, but also need to maintain good high transparency of visible and infrared light, such as observation windows for high-end medical equipment, Shielding components of precision communication equipment, observation windows of ultra-fine monitoring equipment, optical windows of aircraft and aviation weapons, windows of advanced optical instruments, etc. However, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00H01Q15/00G02B5/00G02B1/00
CPCH01Q17/008H01Q15/0086G02B1/002G02B5/003
Inventor 张龙董红星张阳姜雄伟
Owner 杭州光学精密机械研究所
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