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:
Apr. 21, 1992
Filed:
Jul. 06, 1990
Applicant:
Inventors:
Hiroshi Daimon, Yao, JP;
Shozo Ino, Tokyo, JP;
Assignee:
Shimadzu Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
252205 ; 250309 ; 250310 ;
Abstract
A charged particle analyzer comprises a spherical grid, a spherical electrode concentric with each other, an emission portion for emitting charged particles, a screen plate having an exit opening, a plurality of second spherical grids forming a high pass filter for the charged particles, a detector for detecting the charged particles, and an obstacle ring being in parallel with an equatorial plane normal to a line connecting the emission portion and the center of the exit opening and being within the spherical electrode.