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:
Jul. 21, 1992
Filed:
Apr. 18, 1990
Thomson Tubes Electroniques, Boulogne Billancourt, FR;
Abstract
The disclosure concerns television cameras having an image pick-up electron tube. The signal input plate of the tube according to the invention is made by molding and a connection pin is embedded in the glass during the molding operation itself. When the internal and external faces of the input plate are then polished, the end of the pin on the internal side of the pin is levelled down at the same time. All that remains to be done then is to deposit a transparent conductive layer and a photoconductive target on this perfectly plane face. Furthermore, the unpolished edges of the input plate and, more particularly, its lateral edges are covered with a light-absorbing black layer which is produced not by the deposition of a black paint but by chemical reduction of the metal oxides contained in the glass. This blackening is preferably obtained during the molding operation itself, by placing the mold in a hydrogen-reducing atmosphere.