Electromagnetic shielding light window based on nested array of multi-period metal rings

Abstract

The invention provides an electromagnetic shielding optical window based on a multicycle metal circular ring nested array, and belongs to the technical field of electromagnetic shielding. A set of concentric metal circular ring pairs and another metal circular rings are respectively ranked and tightly connected and distributed in an equilateral triangle mode to form two-dimensional metal meshes and are distributed in a cross mode, and the two-dimensional metal meshes are loaded to the surface of a transparent substrate of the optical window, wherein the diameter of the concentric circular ring pairs and the diameter of another metal circular rings are different; the concentric circular ring pairs and internally-tangent communicated sub circular rings contained inside the concentric circular ring pairs form a basic circular ring array, another circular rings form a modulated circular ring array, and the basic circular ring array and the modulated circular ring array jointly form the multicycle metal circular ring nested array, wherein the diameter of the concentric circular ring pairs and the diameter of another metal circular rings are different. It is guaranteed that all the circular rings are mutually conductive by overlapping lines or arranging metal which guarantees reliable electrical connection between metal ring points of tangency at joints where the circular rings are tangently communicated. By the arrangement of the relation of the diameters and the positions of all the circular rings in the circular ring nested array, through the metal mesh structure, distribution unevenness of high-level diffraction light intensity of the meshes can be remarkably reduced, stray light caused by diffraction is more evenly distributed, 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 based on a nested array of multi-period metal 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 inside and outside the cabin. O...

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 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 based on a nested array of multi-period metal rings was developed to achieve the purpose of depth homogenization of high-order diffraction and extremely low impact on imaging quality

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