X-ray source with multiple grids
AssigneesVEC Imaging GmbH & Co. KG, Varex Imaging Corporation
InventorsHouman Jafari, Bo Gao, Vance Scott Robinson, Colton B. Woodman, Mohamed Zaza
Life of this patent
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Abstract
Some embodiments include an x-ray source, comprising: an anode; a field emitter configured to generate an electron beam; a first grid configured to control field emission from the field emitter; a second grid disposed between the first grid and the anode; and a middle electrode disposed between the first grid and the anode wherein the second grid is either disposed between the first grid and middle electrode or between the middle electrode and the anode.
Claims19
An x-ray source, comprising:
- an anode;
- a field emitter configured to generate an electron beam;
- a first grid configured to control field emission from the field emitter;
- a second grid disposed between the first grid and the anode;
- and
- a middle electrode disposed between the first grid and the anode wherein the second grid is either disposed between the first grid and middle electrode or between the middle electrode and the anode;
- wherein the second grid is a mesh grid.
An x-ray source, comprising:
- a vacuum enclosure;
- an anode disposed in the vacuum enclosure;
- a plurality of field emitters disposed in the vacuum enclosure, each field emitter configured to generate an electron beam;
- a plurality of first grids, each first grid associated with a corresponding one of the field emitters and configured to control field emission from the corresponding field emitter;
- a second grid disposed between the first grids and the anode;
- and
- a middle electrode disposed between the first grids and the anode wherein the second grid is either disposed between the first grids and middle electrode or between the middle electrode and the anode;
- wherein the second grid is a mesh grid.
An x-ray source, comprising:
- means for emitting electrons from a field;
- means for controlling the emissions of electrons from the means for emitting electrons from the field;
- means for generating x-rays in response to incident electrons;
- and
- means for altering an electric field at multiple locations between the means for controlling the emissions of electrons from the means for emitting electrons from the field and the means for generating x-rays in response to the incident electrons;
- wherein the means for altering the electric field at multiple locations includes a mesh grid at at least one of the locations.
Dependencies are inferred from the claim text.