Two-dimensional orthogonal concentric circular ring distribution array electromagnetic shielding optical window with internally-tangent sub circular rings

Abstract

The invention discloses a two-dimensional orthogonal concentric circular ring distribution array electromagnetic shielding optical window with internally-tangent sub circular rings, and belongs to the technical field of electromagnetic shielding of optical transparent parts. One set of concentric metal circular rings are orthogonally arranged in a two-dimensional mode, tightly connected to form a metallic mesh and loaded on the surface of a transparent substrate of the optical window. The external circular rings of each concentric circular ring pair are equal in diameter, and the adjacent external circular rings are communicated in an externally-tangent mode. Each concentric circular ring pair is internally provided with sub circular rings, wherein the sub circular rings are communicated with the external circular ring of the corresponding concentric circular ring in an internally-tangent mode. A basic unit of the two-dimensional metallic mesh is composed of the concentric circular ring pairs and the sub circular rings internally tangent with the concentric circular ring pairs. The diameter of each circular ring is of the millimeter magnitude and the submillimeter magnitude. The width of each line is of the millimeter magnitude and the submillimeter magnitude. 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 the stray light distribution caused by diffraction is more even.

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 two-dimensional orthogonal distribution arrays of concentric rings with inscribed sub-rings. Background technique [0002] With the widening and increasing intensity of the electromagnetic wave application spectrum, the requirements for electromagnetic shielding optical windows used in aerospace equipment, advanced optical instruments, communication equipment, medical diagnostic instruments and security facilities are getting higher and higher, mainly requiring optical 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 windows of aircraft in the field of aerospace equipment must achieve high-quality isolation of electrom...

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to overcome the shortcomings 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, a concentric circular two-dimensional orthogonal distribution array electromagnetic shielding light window with inscribed sub-rings has been developed to achieve depth homogenization and extremely low imaging quality of advanced sub-diffraction purpose of influence

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