Television camera tube

Details Television camera tube Television camera tube

H - Electricity

01

J

313/35.2

H01J 31/38 (2006.01) H01J 29/02 (2006.01) H01J 29/84 (2006.01)

Patent

CA 1228111

ABSTRACT: Television camera tube comprising in an evacuated envelope (1) a target (12, 13) consisting of a signal layer (13) having thereon a photo conductive layer (12), for recording the information of the image to be recorded, an electron gun (3) for generating an electron beam for scanning the target and a diaphragm (15) between the electron gun (3) and the target (12, 13) for limiting the electron beam. If in such a tube a surface layer (19) on the diaphragm (15) on the snide facing the target (12, 13) consists substantially of a metal or an alloy of metals from the group of gold and platinum, local charging of the surface of the diaphragm (15) and hence deflection and focussing deflects are prevented.

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