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:
Jan. 18, 2000
Filed:
Oct. 16, 1997
Applicant:
Inventor:
Hiromi Nunome, Tokyo, JP;
Assignee:
JEOL Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250305 ; 2503 / ;
Abstract
There is disclosed an energy filter having polepieces which form lenses and are mounted at accuracies that can be easily checked. The positions of the lenses can be easily readjusted. The lenses are mounted to a base plate and stacked on top of each other between two polepieces via two spacers. The polepieces form magnetic poles. These lenses are mounted to the base plate with screws so as to form a passage.