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. 16, 2010
Filed:
Aug. 07, 2008
Applicants:
Takeshi Kawasaki, Musashino, JP;
Noboru Moriya, Tokorozawa, JP;
Tomonori Nakano, Kokubunji, JP;
Kotoko Hirose, Abiko, JP;
Inventors:
Takeshi Kawasaki, Musashino, JP;
Noboru Moriya, Tokorozawa, JP;
Tomonori Nakano, Kokubunji, JP;
Kotoko Hirose, Abiko, JP;
Assignee:
Hitachi High-Technologies Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 1/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides an aberration corrector giving excellent assembly accuracy but having fewer parts and fewer adjustment locations in number. In order to achieve it, a multistage multipole is formed by arranging plural combinations of electrodes around an optical axis using alignment blocks, each combination of electrodes being made by brazing-integrating plural electrodes with a ceramic material interposed therebetween.