Electromagnetic shielding curved-surface optical window based on ultrathin doped metal/medium composite structure

Abstract

The invention discloses an electromagnetic shielding curved-surface optical window based on an ultrathin doped metal / medium composite structure, belonging to the field of electromagnetic shielding of optical transparent parts. According to a curved-surface transparent electromagnetic shielding device in the invention, a dielectric film and an ultrathin metal film are sequentially deposited on a curved-surface substrate to form a composite structure, a high-quality doped metal film with a continuous surface and extremely low roughness is obtained under an ultrathin thickness condition by utilizing a co-doping deposition method, and a novel solution is provided for electromagnetic shielding of a large-size curved-surface light window. The thickness of the ultrathin doped metal film and the dielectric film is less than dozens of nanometers and is far less than the microwave band electromagnetic wave wavelength, so stable strong electromagnetic reflection can be provided, electromagnetic shielding bandwidth is greatly widened, and the problem that the electromagnetic shielding bandwidth of a metal mesh structure is seriously limited due to periodic trepanning is solved. Meanwhile, the light transmittance and the electromagnetic shielding efficiency of the composite structure are controlled by regulating and controlling the number of ultra-thin metal / medium units, and strong electromagnetic shielding in a broadband range is achieved. Furthermore, by designing a combination of the thickness of the ultrathin doped metal and medium units and the number of the units, the coupling transmission of visible light by the composite structure is realized, and good optical permeability is realized.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding of optical transparent parts, in particular to an electromagnetic shielding curved surface optical window based on an ultra-thin doped metal / medium composite structure. Background technique [0002] From radio, television, radar, satellite communication and navigation, mobile communication to wireless positioning, medical diagnosis, etc., electromagnetic wave technology is widely used in various fields of people's daily life and production. Especially with the continuous development of electromagnetic wave communication technology, the terminal equipment for transmitting and receiving electromagnetic waves has increased by an order of magnitude, the electromagnetic wave application band has been continuously broadened, and the electromagnetic wave transmission power has been continuously enhanced, resulting in increasingly serious electromagnetic pollution problems. One of its effects is t...

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Problems solved by technology

[0020] The purpose of the present invention is to overcome the deficiencies of the above-mentioned existing transparent electromagnetic shielding technology, especially for the severely limited bandwidth of electromagnetic shielding in the existing metal grid electromagnetic shielding technology, the complex design rules of the grid structure, and the difficulty in achieving super strong broadband suppression. Electromagnetic shielding and the realization of curved surface electromagnetic shielding, etc., develop an electromagnetic shielding curved surface optical window based on ultra-thin doped metal / dielectric composite structure, and realize a maskless processing scheme on the curved surface, because this method does not involve any graphics generation and transfer process, which greatly simplifies the processing steps, saves costs and can realize large-area curved optical window processing

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