公开(公告)号：US09668391B2

公开(公告)日：2017-05-30

申请号：US15118815

申请日：2014-12-16

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Zhengang Lu ,  Jiubin Tan

IPC: H05K9/00 ,  G02B5/18

CPC classification number: H05K9/0094 ,  G02B5/18 ,  G02B5/1866 ,  G02B27/0018 ,  G02B27/46 ,  G02B2207/121 ,  H05K9/0086

Abstract: An optical window based on an array of rings and sub-rings having a triangular and orthogonal mixed distribution is suited for electromagnetic shielding. The array has metal rings of the same diameter acting as basic rings closely arranged according to an equilateral triangular and two-dimensional orthogonal square mixed arrangement and is loaded on an optical window transparent substrate surface. Adjacent basic rings are connected externally tangentially. Metal sub-rings are arranged within each basic ring and connected thereto internally tangentially. Each basic ring and its sub-rings constitute a basic unit. At tangential connection locations of the rings, wires overlap or metal is provided to ensure reliable electrical connections between connected rings, thus all rings are conductive. The metal grid structure significantly reduces non-uniformity of grid high-order diffracted light intensity distribution, thereby causing stray light distribution caused by diffraction to be more uniform and imaging to be less affected.

公开(公告)号：US09686892B2

公开(公告)日：2017-06-20

申请号：US15118820

申请日：2014-12-16

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Jiubin Tan ,  Zhengang Lu

IPC: H05K9/00 ,  G02B5/18

CPC classification number: H05K9/0094 ,  G02B5/1866 ,  G02B27/0018 ,  G02B27/46 ,  G02B2207/121 ,  H05K9/0086

Abstract: Optical windows based on a multi-period master-slave nested ring array of concentric rings are suited for electromagnetic shielding. A metal grid of the ring array has basic rings, concentric sub-ring pairs, secondary sub-rings, filling rings, concentric modulation ring pairs, and modulation sub-rings. Basic rings and concentric modulation ring pairs form a two-dimensional orthogonal array. External rings of concentric modulation ring pairs are externally tangentially connected to basic rings. Concentric sub-ring pairs and filling rings are arranged within basic rings, secondary sub-rings are arranged within concentric sub-ring pairs, and modulation sub-rings are arranged within concentric modulation ring pairs. Where rings are tangentially connected, wires overlap or metal ensures reliable electrical connections between connected rings, thus all rings are conductive. The metal grid structure significantly reduces non-uniformity of grid high-order diffracted light intensity distribution, causing stray light distribution caused by diffraction to be more uniform and imaging to be less affected.