The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2018
Filed:
Mar. 17, 2015
Varex Imaging Corporation, Salt Lake City, UT (US);
Bradley D. Canfield, Orem, UT (US);
VAREX IMAGING CORPORATION, Salt Lake City, UT (US);
Abstract
An X-ray tube comprising: a cathode including an emitter; an anode; a first magnetic quadrupole formed on a first yoke and having a magnetic quadrupole gradient for focusing an electron beam in a first direction and defocusing the beam in a second direction; a second magnetic quadrupole formed on a second yoke and having a magnetic quadrupole gradient for focusing the electron beam in the second direction and defocusing the electron beam in the first direction; wherein a combination of the first and second magnetic quadrupoles provides a net focusing effect in both first and second directions of a focal spot of the electron beam; and a pair of opposing quadrupole electromagnetic coils having alternating current offset being configured to deflect the electron beam in order to shift the focal spot of the electron beam on a target.