An electronic detector system that has contributed to the knowledge of astronomy: This image photon counting system is a four-stage, magnetically-focused image intensifier, coupled via a lens to a plumbicon television camera tube.

A "plumbicon" is the development of the vidicon television camera tube in which the photosensitive material is lead oxide.

A "plumbicon" is a registered trademark of Philips for its Lead Oxide (PbO) target vidicons or camera tubes in which a charge-density patterns are formed by photoconduction and stored on photoconductor surfaces that are scanned by electron beams, usually of low-velocity electrons; used chiefly in industrial television cameras.