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:
Oct. 31, 2000
Filed:
Feb. 26, 1999
Applicant:
Inventors:
Toshikatsu Kaneyama, Tokyo, JP;
Toshikazu Honda, Tokyo, JP;
Michiyoshi Tanaka, Taihaku-ku, Sendai, 982-0801, JP;
Masami Terauchi, Sendai, JP;
Kenji Tsuda, Sendai, JP;
Assignees:
Jeol Ltd., , JP;
Other;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250305 ; 2503 / ;
Abstract
There is disclosed an imaging energy filter equipped with a distortion corrector. The energy filter is incorporated in an electron microscope and includes a spectrometer having magnets for producing magnetic fields. In this spectrometer, coils for exciting the magnets and potentiometers having variable resistors are connected in parallel. The variable resistors of the potentiometers are shifted to control the ratio of currents flowing into coils of shunting circuits.