30results about How to "Does not affect the electromagnetic shielding effect" patented technology

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.

The invention discloses an orthogonal circular ring and sub circular ring array electromagnetic shielding optical window with externally-tangent connecting circular rings, and belongs to the technical field of electromagnetic shielding. Two kinds of metal circular rings of different diameters are used as basic circular rings and the connecting circular rings respectively, tightly connected to form a two-dimensional metallic mesh, and loaded on the surface of a transparent substrate of the optical window. The basic circular rings are orthogonally arranged in a two-dimensional mode and separated from each other in the arrangement direction at equal intervals. A connecting unit is composed of every two connecting circular rings communicated in an externally-tangent mode, and the connecting units are perpendicularly, alternately and orthogonally arranged in a two-dimensional mode. The separated basic circular rings are connected through the connecting units. The basic circular rings are internally provided with sub circular rings communicated with the basic circular rings in an internally-tangent mode, and a basic unit of the structure of the two-dimensional mesh is composed of the basic circular rings and the sub circular rings. It is ensured that all the circular rings are mutually conductive at the positions where the circular rings are communicated in a tangent mode through line overlapping or the arrangement of metal capable of ensuring reliable electric linkage between tangency points of the metal rings. According to the structure of the metallic mesh, inhomogeneity of high-level diffraction light distribution of the mesh can be remarkably reduced, so that distribution of stray light caused by diffraction is more even, and the influence on imaging is smaller.

The invention relates to an electromagnetic shielding light window based on four-external-tangent orthogonal ring units and sub ring units and belongs to the technical field of electromagnetic shielding. Metal rings with the same diameter are used as basic rings to form the four-external-tangent orthogonal ring units and are densely connected and arranged in a two-dimensional orthogonal mode to form metal grids. Each four-external-tangent orthogonal ring unit is formed by communicating the four basic rings in an external tangent mode, wherein the four basic rings are arranged in a two-dimensional orthogonal mode. The included angle between the line connection direction of the centers of the basic rings and the array direction of the four-external-tangent orthogonal ring units which are arranged in the two-dimensional orthogonal mode is 15 degrees or 75 degrees, the adjacent basic rings of the adjacent four-external-tangent orthogonal ring units are communicated in an external tangent mode, and sub rings communicated with the basic rings in an internal tangent mode are arranged in the basic rings. Metal which ensures reliable electric connection between points of tangency of the metal rings is overlapped through lines or arranged at the joints where the rings are communicated in the external tangent mode, and it is ensured that all the rings are mutually conducted. According to the structure of the metal grids, nonuniformity of high-level diffraction light intensity distribution of the grids can be obviously relieved, stray light caused by diffraction can be distributed more uniformly, and influences on imaging are less.

The invention relates to a crossed triangular distribution metal circular ring array electromagnetic shielding light window with internally tangent sub circular rings, and belongs to the technical field of electromagnetic shielding. Two kinds of metal circular rings with different diameters are respectively and tightly connected and ranged and are distributed in a crossed way according to the equilateral triangle arrangement to form a two-dimensional metal mesh grid to be loaded on the surface of a transparent substrate of the light window, and the adjacent circular rings with the same diameters are communicated in an externally tangent way, wherein the sub circular rings communicated in the internally tangent way are arranged inside the circular rings with one diameter, and the circular rings and the sub circular rings communicated in the internally tangent way jointly form a basic unit of the two-dimensional metal mesh grid; at internally-tangent communicated connection parts of the circular rings, all circular rings are enabled to be mutually communicated for realizing electric conduction through line overlapping or through installation of metal capable of ensuring reliable electric connection between metal annular tangent points. Compared with the existing metal mesh grid structure, the metal mesh grid structure provided by the invention has the advantages that the nonuniformity of the mesh grid high-grade-order diffraction light intensity distribution can be obviously reduced, the distribution of stray light caused by diffraction is more uniform, and the influence on the imaging is less.

The invention discloses an array electromagnetic shielding optical window with three-period externally-tangent circular rings and internally-tangent sub circular rings, and belongs to the technical field of electromagnetic shielding. The three kinds of metal circular rings of different diameters are used as basic circular rings, connecting circular rings and filling circular rings respectively, arranged according to an equilateral triangle or according to shared vertexes of a regular hexagon or according to shared edges of the regular hexagon to form a metallic mesh and loaded on the surface of an optical transparent substrate. The metal circular rings of the same diameter are separated from each other. The outer side of each basic circular ring is provided with six connecting circular rings distributed at equal intervals and provided with six filling circular rings distributed at equal intervals, wherein the six connecting circular rings are communicated with the corresponding basic circular ring in an externally-tangent mode, and the filling circular rings are communicated with the adjacent connecting circular rings in an externally-tangent mode. The basic circular rings are internally provided with the internally-tangent sub circular rings. It is ensured that all the circular rings are mutually conductive at the positions where the circular rings are communicated in a tangent mode through line overlapping or the arrangement of metal capable of ensuring reliable electric linkage between tangency points of the metal rings. According to the metallic mesh, due to the combined action of the three-period externally-tangent circular rings and the internally-tangent sub circular rings, inhomogeneity of distribution of stray light caused by high-level diffraction of the mesh can be remarkably reduced.

The invention provides an electromagnetic shielding structure of a photomultiplier tube, comprising the following steps: a shielding layer and an insulating layer are sequentially arranged on the periphery of the tube body of the photomultiplier tube. The shielding layer is in contact with the pipe wall of the pipe body to shield the electric field and the magnetic field of the pipe body, and theinsulating layer wraps the shielding layer to encapsulate and isolate the shielding layer. The shielding layer is connected with the corresponding pin of the photomultiplier tube, and the shielding layer is a single layer structure made of permalloy material. The structure can reduce the thickness of the encapsulation shielding layer without affecting the electromagnetic shielding effect, so thatthe encapsulation process is more simple and the shielding effect is more reliable.

The invention discloses a triangular concentric circular ring distribution array electromagnetic shielding optical window with internally-tangent sub circular rings, and belongs to the technical field of electromagnetic shielding. One set of concentric metal circular rings are arranged according to an equilateral triangle, tightly connected to form a metallic mesh and loaded on the surface of a transparent substrate of the optical window. External circular rings of each concentric circular ring pair are equal in diameter, and the adjacent external circular rings are communicated in an externally-tangent mode. Each concentric circular ring pair is internally provided with one sub circular ring, wherein the sub circular ring is communicated with the external circular ring of the corresponding concentric circular ring pair in an internally-tangent mode. A basic unit of the two-dimensional metallic mesh is jointly composed of the concentric circular ring pairs and the sub circular rings internally tangent with the concentric circular ring pairs. The diameter of each circular ring is of the millimeter magnitude and the submillimeter magnitude. The width of each line is of the millimeter magnitude and the submillimeter magnitude. It is ensured that all the circular rings are mutually conductive at the positions where the circular rings are communicated in a tangent mode through line overlapping or the arrangement of metal capable of ensuring reliable electric linkage between tangency points of the metal rings. According to the structure of the metallic mesh, inhomogeneity of high-level diffraction light distribution of the mesh can be remarkably reduced, so that distribution of stray light caused by diffraction is more even, and the influence on imaging is smaller.

The invention provides an electromagnetic shielding optical window based on a multicycle master-slave nested circular ring orthogonal array, and belongs to the technical field of electromagnetic shielding. The electromagnetic shielding optical window is characterized in that metal meshes of the multicycle master-slave nested circular ring array are formed by basic circular rings, sub circular rings, secondary sub circular rings, filling circular rings, modulated circular rings and modulated sub circular rings, wherein the basic circular rings form a two-dimensional orthogonal externally-tangent communicated array, the modulated circular rings form a two-dimensional orthogonal separation array, the modulated circular rings and the basic rings are communicated in an externally-tangent mode, the sub circular rings and the filling circular rings which are communicated with the basic circular rings in an internally-tangent mode are arranged in the basic circular rings, the secondary sub circular rings which are communicated with the sub circular rings in an internally-tangent mode are arranged in the sub circular rings, and the modulated sub circular rings which are communicated with the modulated circular rings in an internally-tangent mode are arranged in the modulated circular rings. It is guaranteed that all the circular rings are mutually conductive by overlapping lines or arranging metal which guarantees reliable electrical connection between metal ring points of tangency at joints where the circular rings are tangently communicated. Through the metal mesh structure, distribution unevenness of high-level diffraction light intensity of the meshes can be remarkably reduced, stray light caused by diffraction is more evenly distributed, and the influence on imaging is smaller.