Electromagnetic shielding optical window based on triangularly-distributed tangent circular ring and internally-tangent sub circular ring array

Abstract

The invention provides an electromagnetic shielding optical window based on a triangularly-distributed tangent circular ring and internally-tangent sub circular ring array, and belongs to the technical field of electromagnetic shielding. Metal circular rings with the same diameter are ranked and tightly connected in an equilateral triangle mode to form a mesh array, the mesh array is loaded to the surface of a transparent substrate of the optical window, every two adjacent circular rings are communicated in an externally-tangent mode, a sub circular ring which is communicated with each circular ring in an internally-tangent mode is arranged in each circular ring, the circular rings are used as basic circular rings, and the basic circular rings and the sub circular rings which are communicated with the circular rings in the internally-tangent mode jointly form basic units of a two-dimensional metal mesh array structure. It is guaranteed that all the circular rings are mutually communicated and conductive by overlapping lines or arranging metal which guarantees reliable electrical connection between metal ring points of tangency at joints of every two adjacent basic circular rings and joints of the basic circular rings and the sub circular rings which are communicated with the circular rings in the internally-tangent mode. Through the metal mesh structure, distribution unevenness of high-level diffraction light intensity of 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 triangular distribution of tangent rings and inscribed 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 To solve the problem of relatively concentrated stray light distribution caused by sub-diffraction, an electromagnetic shielding light window based on a triangular distribution of tangent rings and inscribed sub-ring arrays has been developed to achieve depth averaging of high-order diffraction and extremely low impact on imaging quality the goal of

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