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:
Sep. 12, 2017
Filed:
Dec. 04, 2014
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Koichi Takasaki, Tokyo, JP;
Noritaka Ukiyo, Inagi, JP;
Osamu Taniguchi, Chigasaki, JP;
Takao Ogura, Yokohama, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 35/00 (2006.01); H01J 35/16 (2006.01); G21K 1/02 (2006.01);
U.S. Cl.
CPC ...
H01J 35/16 (2013.01); G21K 1/02 (2013.01); H01J 2235/087 (2013.01); H01J 2235/165 (2013.01);
Abstract
A radiation tube includes an enclosure having an opening portion, an electron source disposed inside the enclosure, a target unit configured to generate radiation by being bombarded with electrons emitted from the electron source, and a front shield disposed on the opening portion and joined to the target unit. The front shield has a slit-shaped opening that shields some of the radiation radiated from the target unit. The radiation is radiated through the opening in the shape of a fan beam.