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. 17, 1984
Filed:
Jul. 20, 1981
Nicolaas H Limper, Eindhoven, NL;
Cornelis J Scheffers, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A television camera tube comprising, in an evacuated envelope, an electron gun to generate an electron beam which during operation of the tube is focused to form a spot on a photosensitive target. On the target, a potential distribution is formed by projecting an optical image on it. By scanning the target with an electron beam, signals corresponding to the optical image are produced. The target is scanned in a line deflection direction and a frame deflection direction. According to the invention, the spot has an elongate shape, which shape is determined by a line at the edge of the spot which interconnects points having the same current density. The shape of the electron spot is such that the ratio, k, between the lengths of the long and short axes of the spot is 1.4.ltoreq.k.ltoreq.2. The long axis of the spot divides the acute angle between the line deflection direction and the frame deflection direction in such manner that
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile