Abstract:
A camera tube of the type of a vidicon, a scan converter, or the like comprises a single seal member of high melting-point metal having a first portion sealed to the periphery of the face plate, a second portion sealed to the adjacent end of the tubular casing, and a third portion disposed between the face plate and the tubular casing. The third portion is provided with a radially inwardly projecting portion of high melting-point metal. The target electrode is encircled by a ring member provided with a plurality of springs of resilient metal for engaging with the projecting portion to support the target electrode.