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

Abstract

The invention discloses an electromagnetic shielding light window based on a multi-cycle metal ring two-dimensional orthogonal nested array, which belongs to the technical field of electromagnetic shielding. Two groups of concentric ring pairs are airtightly connected and arranged as a two-dimensional orthogonal array respectively to form a two-dimensional metallic mesh as well as overlapped, distributed and loaded on the surface of the transparent substrate of the light window; outer rings in one group of the concentric ring pairs are used as basic rings and internally provided with internally tangential communication sub-rings, and the outer rings and the internally tangential communication sub-rings form the basic unit of the two-dimensional metallic mesh structure and a basic ring array; the other group of concentric ring pairs forms a modulation ring array; the basic ring array and the modulation ring array are overlapped and distributed to form a two-dimensional orthogonal nested array structure; the mutual conduction of all the rings is guaranteed by overlapping lines or arranging metal for ensuring reliable electric connection among metal ring tangent points at the junctions where the rings are tangentially communicated. The metallic mesh structure of the light window disclosed by the invention is capable of remarkably reducing the non-uniformity of the high-order diffraction light intensity distribution of the mesh, thus the stray light distribution due to diffraction is more uniform and small in influence on imaging.

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 two-dimensional orthogonal 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 insi...

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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 two-dimensional orthogonal nested array of multi-period metal rings was developed to achieve depth homogenization of high-order diffraction and extremely low impact on imaging quality the goal of

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