Design method for overlapped circular ring mesh based on random circle center position and variable diameter

A technology of center position and design method, applied in the direction of diffraction grating, optics, instruments, etc., can solve the problems of strong electromagnetic shielding performance, low imaging quality, impact, etc., and achieve the effect of reducing impact and improving concentrated distribution problems

Inactive Publication Date: 2018-06-15
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a design method based on the random center position and variable diameter of overlapping ring grids, so as to improve the problem of concentrated distribution of high-order diffraction energy of traditional periodic structure metal grids, and to achieve high light transmittance at the same time Low imaging quality impact and strong electromagnetic shielding performance

Method used

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  • Design method for overlapped circular ring mesh based on random circle center position and variable diameter
  • Design method for overlapped circular ring mesh based on random circle center position and variable diameter
  • Design method for overlapped circular ring mesh based on random circle center position and variable diameter

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Embodiment 1

[0039] In this embodiment, randomly overlapping ring grid periods g The random area of ​​is a circular area, and the initial parameter of the periodic structure overlapping circular ring grid is the period g 0 =400μm, diameter 2 R 0 =600μm. grid cycle g The random range is designed to be 35%, diameter 2 R The random range of is designed to be 35%. The radius generated at the center of each ring unit is r The circular area of ​​, which is concentric with the ring, has a radius of r A series of uniformly distributed points are generated in the X-axis direction of the small circle, and a point is randomly selected in the X direction, and compared with this x Select one for the Y direction corresponding to the coordinates y coordinate,( x , y ) is the position of the center of the circle after randomization, and the period g A random range of [ g 0 -2 r , g 0 -2 r ]. Ring diameter in [2 R 0 -Δ R ,2 R 0 +Δ R ] to randomize. by regulating r value to change...

Embodiment 2

[0041] In this embodiment, randomly overlapping ring grid periods g The random area of ​​is a square area, and the initial parameter of the periodic structure overlapping circular ring grid is the period g 0 =400μm, diameter 2 R 0 =600μm. The side length generated at the center of each ring is a The square area, the center of the square area coincides with the center of the circle, randomly select a point in the X-axis direction of the square, and x Select one for the Y-axis direction corresponding to the coordinates y coordinate,( x , y ) is the position of the center of the circle after randomization, and the period g A random range of [ g 0 - a ,( g 0 2 +2 a 2 +2 g 0 a ) 1 / 2 ]. By adjusting the side length a value to change the period g The size of the random region is adjusted by Δ R , the size to change the diameter to 2 R random range of .

Embodiment 3

[0043] In this embodiment, randomly overlapping ring grid periods g The random area of ​​is a hexagonal area, and the initial parameter of the periodic structure overlapping ring grid is period g 0 =400μm, diameter 2 R 0 =600μm. The side length generated at the center of each ring is b The regular hexagon area, the center of the regular hexagon coincides with the center of the ring, randomly select a point in the X-axis direction of the regular hexagon, and x Select one for the Y-axis direction corresponding to the coordinates y coordinate,( x , y ) is the center position of the circle after randomization, g A random range of [ g 0 -1.732 b ,( g 0 2 +4 b 2 +3.464 bg 0 ) 1 / 2 ], by adjusting Δ R , the size to change the diameter to 2 R random range of .

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Abstract

The invention discloses a design method for an overlapped circular ring mesh based on random circle center position and variable diameter, and belongs to the technical field of electromagnetic shielding of optical windows. Random parameters of the overlapped circular ring mesh comprise diameter and period parameters. The random fashion is which the diameter parameter and the period parameter are random simultaneously is adopted, the random period is realized through the random circle center position, the random area of the circle center position is divided into polygonal areas such as quadrangular and hexagonal areas as well as circular areas respectively, and the diameter parameter is randomized in a symmetrical range taking an initial diameter value as the center. The circle center position of each circular ring unit inside the overlapped circular ring mesh is randomized inside a fixed area so as to obtain the overlapped circular ring mesh of a random structure, and the random methodcan effectively randomize the period and diameter of a circular ring inside the mesh structure. Compared with a traditional mesh of a periodical structure, the overlapped circular ring mesh based onthe random method can effectively homogenize the high-grade order diffraction energy of the mesh, so that the distribution of stray light is more uniform, and the influence on imaging quality is obviously reduced.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding of optical windows, and in particular relates to a design method of overlapping circular ring grids based on random center positions and variable diameters. Background technique [0002] With the rapid development of wireless devices, electromagnetic waves are widely used in all aspects of production and life, and the space electromagnetic environment is becoming more and more complex, especially in the microwave and radio bands. Therefore, the shielding of electromagnetic interference has gradually become an urgent problem in many fields, such as the precision detection of optical windows, aerospace devices, medical devices, and electronic displays. The electromagnetic shielding of the optical window needs to meet the high transmittance of visible light and infrared bands and the strong electromagnetic shielding performance of microwave and radio bands at the same time. In order to solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00G02B5/18G02B27/00
CPCH05K9/0058G02B5/1866G02B27/0012
Inventor 刘永猛左翠莲谭久彬
Owner HARBIN INST OF TECH
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