Crossed triangular distribution metal circular ring array electromagnetic shielding light window with internally tangent sub circular rings

Abstract

The invention relates to a crossed triangular distribution metal circular ring array electromagnetic shielding light window with internally tangent sub circular rings, and belongs to the technical field of electromagnetic shielding. Two kinds of metal circular rings with different diameters are respectively and tightly connected and ranged and are distributed in a crossed way according to the equilateral triangle arrangement to form a two-dimensional metal mesh grid to be loaded on the surface of a transparent substrate of the light window, and the adjacent circular rings with the same diameters are communicated in an externally tangent way, wherein the sub circular rings communicated in the internally tangent way are arranged inside the circular rings with one diameter, and the circular rings and the sub circular rings communicated in the internally tangent way jointly form a basic unit of the two-dimensional metal mesh grid; at internally-tangent communicated connection parts of the circular rings, all circular rings are enabled to be mutually communicated for realizing electric conduction through line overlapping or through installation of metal capable of ensuring reliable electric connection between metal annular tangent points. Compared with the existing metal mesh grid structure, the metal mesh grid structure provided by the invention has the advantages that the nonuniformity of the mesh grid high-grade-order diffraction light intensity distribution can be obviously reduced, the distribution of stray light caused by diffraction is more uniform, and the influence on the imaging is less.

Description

Technical field [0001] The invention belongs to the field of electromagnetic shielding, and in particular relates to an electromagnetic shielding light window of a cross-triangular distributed metal ring array with inscribed sub-rings. Background technique [0002] With the broadening and increasing of the intensity of electromagnetic wave applications, the requirements for electromagnetic shielding light windows used in aerospace equipment, advanced optical instruments, communication equipment, medical diagnostic equipment and security facilities are getting higher and higher, mainly for light windows. It has a super wide-band electromagnetic shielding ability, but also has a very high light transmittance. The less impact on optical imaging, observation and detection, the better. For example, the optical windows of aircraft in the field of aerospace equipment must achieve high-quality isolation of electromagnetic signals inside and outside the cabin. On the one hand, it shields ...

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Problems solved by technology

[0019] The purpose of the present invention is to overcome the deficiencies of the above-mentioned existing optical window electromagnetic shielding technical solutions, especially for the existing single-layer grid metal grid, single-layer ring grid, double-layer grid and ring grid. In order to solve the problem of relatively concentrated stray light distribution caused by sub-diffraction, an electromagnetic shielding light window with cross-triangular distribution metal ring array with inscribed sub-rings was developed to achieve depth homogenization of high-order diffraction and extremely low impact on imaging quality. Purpose

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