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:
Nov. 03, 2015
Filed:
Nov. 05, 2012
Canon Kabushiki Kaisha, Tokyo, JP;
Koji Yamazaki, Ayase, JP;
Kazuyuki Ueda, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A radiation generating tube includes a cathode connected to an electron emitting member; an anode including a target; and an insulating tube disposed between the cathode and the anode to surround the electron emitting member. The insulating tube includes an electrical potential defining member at an intermediate portion of the insulating tube in a longitudinal axis direction of the insulating tube. The electrical potential defining member is electrically connected to an electrical potential defining unit. The potential of the electrical potential defining member is controlled to be higher than that of the cathode and lower than that of the anode. A boundary of the electrical potential defining member and the insulating tube does not face a portion of the anode exposed to the inside of the radiation generating tube.