Double layer staggered orthogonal tangent circular ring and internally tangent sub-circular ring array electromagnetic shielding light window

Abstract

The invention discloses a double layer staggered orthogonal tangent circular ring and internally tangent sub-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 metallic circular rings through firmly connecting and arranging according to the orthogonal arrangement, the diameters of the externally tangent metallic circular rings are the same, and each circular ring comprises a sub-circular ring which is connected with the internal tangent of the circular ring; the parts near the joints of the basic circular rings and the joints of the basic circular rings and the internally tangent connected sub-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 circular rings are connected and 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 staggered orthogonal tangent ring and inscribed 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 inside a...

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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, a double-layer staggered orthogonal tangent ring and inscribed sub-ring array electromagnetic shielding light window was developed to achieve depth homogenization and extremely low imaging quality of high-level diffraction. The purpose of influence, but also has a good electromagnetic shielding efficiency

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