X-ray source with multiple grids
AssigneesVarex Imaging Corporation, VEC Imaging GmbH & Co. KG
InventorsHouman Jafari, Bo Gao, Vance Scott Robinson, Colton B. Woodman, Mohamed Zaza
Life of this patent
Estimating the term…
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; a third 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 third grid is a mesh grid.
Claims20
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;
- a third 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 third 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;
- and
- a second grid disposed between the first grids and the anode
- a third 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 third grid is a mesh grid.
An x-ray source, comprising:
- a field emitter for emitting electrons from a field;
- a first grid for controlling the emissions of electrons from the field emitter;
- an anode for generating x-rays in response to incident electrons;
- and
- a first mesh grid and second grid for altering an electric field at multiple locations between the first grid and the anode;
- wherein the first mesh grid is at a first location of the multiple locations and the second grid is at a second location of the multiple locations.
Dependencies are inferred from the claim text.