Faraday cage for camera
AssigneeRosemount Aerospace Inc.
InventorsTimothy M. Ophoven, Charles G. Huss, Kevin J. Benning, Nathan D. Evans
Life of this patent
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Abstract
A camera includes an electrically conductive housing defined by exterior walls and an interior cavity. The exterior walls of the housing have a lens opening and a connector opening formed therein. An imaging device is disposed within the interior cavity of the housing and communicates with the lens opening. A printed wiring board (PWB) is disposed within the interior cavity of the housing separating the imaging device from the connector opening. The PWB has an electrically conductive chassis plane operatively connected to the exterior walls of the housing so that the chassis plane and the housing form at least a partial Faraday cage around the imaging device.
Claims19
A camera comprising:
- a) an electrically conductive housing defined by exterior walls and an interior cavity, the exterior walls of the housing having a lens opening and a connector opening formed therein;
- b) an imaging device disposed within the interior cavity of the housing and optically communicating with the lens opening;
- and
- c) a printed wiring board disposed within the interior cavity of the housing separating the imaging device from the connector opening, the printed wiring board having an electrically conductive chassis plane operatively connected to the exterior walls of the housing such that the chassis plane and the housing form at least a partial Faraday cage around the imaging device.
A camera comprising:
- a) an electrically conductive housing defined by exterior walls and an interior cavity, the exterior walls of the housing having a lens opening and a connector opening formed therein;
- b) an imaging device disposed within the interior cavity of the housing and communicating with the lens opening;
- c) a camera connector operatively associated with the connector opening of the housing;
- d) at least one transmission line electrically connecting the imaging device to the camera connector to convey signals between the imaging device and an area remote from the housing;
- and
- e) a printed wiring board disposed within the interior cavity of the housing separating the imaging device from the connector opening, the printed wiring board having an electrically conductive chassis plane operatively connected to the exterior walls of the housing such that the chassis plane and the housing form at least a partial Faraday cage around the imaging device to filter radio frequency emissions between the imaging device and the connector opening of the housing, wherein at least one passage is formed in the at least partial Faraday cage to allow the at least one transmission line to pass therethrough, and wherein the at least one transmission line includes a first EMI filter between the printed wiring board and the imaging device and a second EMI filter between the printed wiring board and the connector to filter unwanted radio frequency emissions between the imaging device and the connector opening through the at least one transmission line.
A Faraday cage for shielding an electronic device comprising:
- a) an electrically conductive housing defined by exterior walls and an interior cavity;
- and
- b) a printed wiring board electrically connected to the exterior walls of the housing, the printed wiring board including:
- i) a layer stackup having a plurality of layers including a first signal layer on an imaging device side of the layer stackup, and a second signal layer on a side of the layer stackup opposite from the first signal layer;
- and
- ii) a substantially solid electrically conductive chassis plane in the layer stackup between the first and second signal layers, wherein the chassis plane includes at least one mounting surface electrically coupling the chassis plane to an the exterior walls of the housing.
Dependencies are inferred from the claim text.