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. 13, 1990
Filed:
Mar. 24, 1986
Adrianus A Franken, Eindhoven, NL;
U.S. Philips Corp., New York, NY (US);
Abstract
Picture pickup device comprising a television camera tube having an electron gun, and a photo-sensitive target in an evacuated envelope. An electron beam generated by the electron gun is focused by focusing means onto the target. The electron beam is deflected by deflection means and describes a line raster across the target. The electron beam forms an elongated spot on the target. The longitudinal axis of the spot is perpendicular to the lines of the raster and has a length which is substantially equal to the line spacing. The elongated spot is obtained with the aid of an adjustable multipolar stigmator which, viewed in the direction of propagation of the electron beam, is provided in front of the focusing and deflection means, coaxially around the axis of the envelope and the electron gun. The shape of the spot can be adjusted in an optimum manner so that stern waves are completely suppressed. It is possible to provide the stigmator in or around the tube and to adjust it by magnetization, if required, through the wall of the envelope.