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:
Dec. 15, 1987
Filed:
Apr. 09, 1986
Applicant:
Inventors:
Shigehiko Takayama, Mitaka, JP;
Hitomi Suzuki, Akishima, JP;
Masanori Maruyama, Kokubunji, JP;
Masakazu Fukushima, Tokyo, JP;
Mitsuhiro Kurashige, Tachikawa, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315382 ; 313389 ;
Abstract
A magnetic-focus electrostatic-deflection image pickup tube utilizes a magnetic field for electron beam focusing and an electrostatic field for electron beam deflection. The magnetic field generated by a magnetic focus coil is distributed on the tube axis to have the peak of intensity which is offset toward the electron gun. The electron beam can be deflected and focused to provide a minimized beam spot with less distortion.