| 摘要 |
A multi-period master-slave nested ring array electromagnetic shielding optical window having concentric rings, belonging to the technical field of electromagnetic shielding. A metal grid of a multi-period master-slave nested ring array having concentric rings is made up of basic rings, concentric sub-ring pairs, secondary sub-rings, filling rings, concentric modulation ring pairs, and modulation sub-rings. The basic rings and the concentric modulation ring pairs form a two-dimensional orthogonal array. External rings of the concentric modulation ring pairs are connected to the basic rings in an external tangential manner. The concentric sub-ring pairs and the filling rings are arranged within the basic rings, the secondary sub-rings are arranged within the concentric sub-ring pairs, and the modulation sub-rings are arranged within the concentric modulation ring pairs. At connection locations where the rings are tangentially connected, wires overlap or the connection locations are covered with metal, the metal ensuring reliable electrical connections between metal ring tangent points. It is thereby ensured that all the rings are mutually conductive. The metal grid structure of the present invention significantly reduces non-uniformity of grid high-order diffracted light intensity distribution, causing stray light distribution brought about by diffraction to be more uniform, and imaging to be less affected. |
