Orthogonal circular ring and sub circular ring array electromagnetic shielding optical window with externally-tangent connecting circular rings

Abstract

The invention discloses an orthogonal circular ring and sub circular ring array electromagnetic shielding optical window with externally-tangent connecting circular rings, and belongs to the technical field of electromagnetic shielding. Two kinds of metal circular rings of different diameters are used as basic circular rings and the connecting circular rings respectively, tightly connected to form a two-dimensional metallic mesh, and loaded on the surface of a transparent substrate of the optical window. The basic circular rings are orthogonally arranged in a two-dimensional mode and separated from each other in the arrangement direction at equal intervals. A connecting unit is composed of every two connecting circular rings communicated in an externally-tangent mode, and the connecting units are perpendicularly, alternately and orthogonally arranged in a two-dimensional mode. The separated basic circular rings are connected through the connecting units. The basic circular rings are internally provided with sub circular rings communicated with the basic circular rings in an internally-tangent mode, and a basic unit of the structure of the two-dimensional mesh is composed of the basic circular rings and the sub circular rings. It is ensured that all the circular rings are mutually conductive at the positions where the circular rings are communicated in a tangent mode through line overlapping or the arrangement of metal capable of ensuring reliable electric linkage between tangency points of the metal rings. According to the structure of the metallic mesh, inhomogeneity of high-level diffraction light distribution of the mesh can be remarkably reduced, so that distribution of stray light caused by diffraction is more even, and the influence on imaging is smaller.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding of optical transparent parts, in particular to an electromagnetic shielding light window with orthogonal rings and sub-ring arrays with circumscribed connecting rings. Background technique [0002] With the widening and increasing intensity of the electromagnetic wave application spectrum, the requirements for electromagnetic shielding light windows used in aerospace equipment, advanced optical instruments, communication equipment, medical diagnostic instruments and security facilities are getting higher and higher, mainly requiring light windows While having a super strong broadband electromagnetic shielding ability, it also has a very high light transmittance, and the less impact on optical imaging, observation, and detection, the better. For example, the optical window of an aircraft in the field of aerospace equipment must achieve high-quality isolation of electromagnetic signals insid...

AI Technical Summary

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 existence of advanced To solve the problem of relatively concentrated stray light distribution caused by sub-diffraction, an electromagnetic shielding light window with orthogonal rings and sub-ring arrays with circumscribed connecting rings has been developed to achieve depth homogenization and extremely low imaging for advanced sub-diffraction purpose of quality impact

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