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

Abstract

The double-layer staggered orthogonal tangent ring and inscribed sub-ring array electromagnetic shielding optical window belongs to the field of electromagnetic shielding technology. The electromagnetic shielding optical window is composed of two layers of metal mesh grids that are rotated and staggered and loaded on both sides of the light window. Each layer of metal mesh The grids are composed of metal rings of the same diameter that are circumscribed and connected in an orthogonal arrangement, and are arranged in close contact with each other. Each ring has a sub-ring that is inscribed with the ring; At the junction with the inscribed connected sub-rings, overlap the lines or set metals to ensure reliable electrical connection between the tangent points of the metal rings, so as to ensure that all the rings are connected to each other and conduct electricity. By selecting the staggered angle of the double-layer grid, the metal grid structure of the present invention can significantly reduce the inhomogeneity of the high-level diffraction light intensity distribution of the grid, make the distribution of stray light caused by diffraction more uniform, and have less impact on imaging; Appropriate substrate thickness can obtain good electromagnetic shielding efficiency.

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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