Two-dimensional Orthogonal Distribution Array Electromagnetic Shielding Light Window of Concentric Rings with Inscribed Subrings

Abstract

The electromagnetic shielding light window of the two-dimensional orthogonal distribution array of concentric rings with inscribed sub-rings belongs to the technical field of electromagnetic shielding of optical transparent parts. A group of concentric metal rings are closely arranged in two-dimensional orthogonal arrangement to form a metal grid and loaded On the surface of the transparent substrate of the light window, the diameters of the outer rings of each pair of concentric rings are equal, and the adjacent outer rings are circumscribed and communicated; Sub-rings, pairs of concentric rings and their inscribed sub-rings together form the basic unit of a two-dimensional metal grid; the diameter of each ring is on the order of millimeters and submillimeters, and the width of lines is on the order of microns and submicrons; For tangentially connected joints, overlap the lines or set metals that ensure reliable electrical connection between the tangent points of the metal rings, so as to ensure that all the rings are connected to each other and conduct electricity. The metal grid structure of the invention can significantly reduce the inhomogeneity of the high-order diffraction light intensity distribution of the grid, and make the stray light distribution caused by diffraction more uniform.

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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