Triangular and orthogonal hybrid-distributed circular ring and sub circular ring array-based electromagnetic shielding optical window

Abstract

The invention relates to a triangular and orthogonal hybrid-distributed circular ring and sub circular ring array-based electromagnetic shielding optical window and belongs to the technical field of electromagnetic shielding. Metal circular rings with the same diameter which are adopted as basic circular rings and are in equilateral triangle and two-dimensional orthogonal hybrid distribution and connected with one another closely, are loaded on the surface of a transparent substrate of the optical window; adjacent basic circular rings are communicated with one another in an externally tangent manner; connection lines of the centers of the adjacent basic circular rings form equilateral triangles or squares; metal sub circular rings which are communicated with each basic circular ring in an internally tangent manner are arranged inside the corresponding basic circular ring, wherein the metal sub circular rings and the corresponding basic circular ring form a basic unit of a two-dimensional grid array structure; joints of places where the circular rings are communicated with one another in an tangent manner are subjected to line overlapping or are provided with metal which can ensure reliable electric connection among metal ring tangent points, such that all circular rings can electrically communicate with one another. With the metal grid structure of the invention adopted, the heterogeneity of high-order diffraction light intensity distribution can be significantly reduced, and the distribution of stray light caused by diffraction can be more uniform, and imaging is lightly affected.

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 triangular and orthogonal mixed distribution rings and sub-ring arrays. 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 ins...

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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 existence of advanced In order to solve the problem of relatively concentrated stray light distribution caused by sub-diffraction, an electromagnetic shielding light window based on triangular and orthogonal mixed distribution rings and sub-ring arrays has been developed to achieve depth homogenization and extremely low imaging quality for high-order diffraction. purpose of influence

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