Dual-layer metal mesh strong electromagnetic shielding optical window possessing graphene interlayers and dual external absorption layers

Abstract

A dual-layer metal mesh strong electromagnetic shielding optical window possessing graphene interlayers and dual external absorption layers belongs to the optical transparent member electromagnetic shielding technology field. The core devices of the electromagnetic shielding optical window are first, second and third transparent absorption layers and a transparent reflection layer, the first and third transparent absorption layers are both composed of 1-6 layers graphene films separated by the transparent mediums, the second transparent absorption layer is composed of 1-3 layers of graphene films separated by the transparent mediums, and the metal meshes A and B form the transparent reflection layer. The first and third transparent absorption layers are placed at the two sides of the transparent reflection layer respectively, and the second transparent absorption layer is placed between the metal meshes A and B. The dual-layer metal mesh strong electromagnetic shielding optical window possessing the graphene interlayers and the dual external absorption layers solves the problem that a conventional transparent electromagnetic shielding method can not consider the low-electromagnetic reflection, the bidirectional strong electromagnetic shielding and the high light transmission simultaneously, and has the characteristics of high light transmission performance, bidirectional strong electromagnetic shielding and low electromagnetic reflection.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding of optical transparent parts, in particular to a double-layer metal grid strong electromagnetic shielding light window with a graphene interlayer and double outer absorption layers. Background technique [0002] With the development of radio, television, wireless communication technology and microwave technology, a large number of radio frequency devices are equipped in various places of human activities, and the spectrum range continues to widen, and the intensity doubles, which not only interferes with electronic equipment, but also affects human health. threaten. This invisible and intangible "electromagnetic pollution" directly acts on machines or human bodies, and is a serious "invisible killer". It has become the fifth largest pollution after air pollution, water pollution, solid waste pollution and noise pollution. Electromagnetic shielding (including absorption and reflection) is ...

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Problems solved by technology

[0020] The purpose of the present invention is to overcome the shortcomings of the above-mentioned existing transparent electromagnetic shielding technology, especially for the mutual restriction of transparency and conductive shielding ability in the existing reflective transparent shielding technology, it is difficult to take into account high light transmittance and strong microwave shielding efficiency, and reflective electromagnetic shielding technology In order to solve the problem of electromagnetic leakage and secondary pollution caused by signals, a double-layer metal grid strong electromagnetic shielding light window with graphene interlayer and double outer absorption layer has been developed to achieve two-way strong electromagnetic shielding, low electromagnetic reflection and high light transmission. purpose of performance

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