Double-layer triangular and orthogonal mixed distribution ring and sub-ring array electromagnetic shielding light window

Abstract

The invention discloses a double-layer triangle and orthogonality mixed distribution tangent circular ring array electromagnetic shielding light window and belongs to the technical field of electromagnetic shielding. The electromagnetic shielding light window is composed of two layers of metallic meshes which are crossly arrayed at two sides of the light window, each layer of metallic mesh is composed of externally tangent connected metallic circular rings through firmly connecting and arranging according to equilateral triangle and two-dimensional orthogonality mixed arrangement, wherein the diameters of the externally tangent connected metallic circular rings are the same, each basic circular ring is provided with an internally tangent connected metallic sub-circular ring, and each basic circular ring and each internally tangent connected metallic sub-circular ring together make up a basic unit of a two-dimensional mesh array structure; the tangentially connected joints of the circular rings are overlapped through lines or are provided with metals which are capable of guaranteeing the reliable electric connection between the annular metal tangent points so as to make sure that all the circular rings are conductive. Through choosing the staggered angle of double layers of meshes, the metallic mesh is capable of obviously lowering the nonuniformity of the senior diffraction intensity distribution of the mesh, and accordingly the stray light caused by diffraction is distributed more uniformly, and the influence on the imaging is less; the electromagnetic shielding efficiency is high through choosing the proper substrate thickness.

Description

technical field

[0001] The invention belongs to the field of electromagnetic shielding of optical transparent parts, in particular to a double-layer triangular and orthogonal mixed distribution ring and sub-ring array electromagnetic shielding light window. 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 in...

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