Abstract :
The choice of systems, i.e. field-sequential or simultaneous, is discussed, and the conclusion is reached that it would be expedient to exploit the simultaneous colour camera using three vidicons. The main features of the camera and its associated control equipment are described. The novel optical system employed allows for maximum light efficiency, and reduces vidicon lag to a minimum; there is a combined focus-and-turret control. The signal amplifiers and line and field scanning circuits are discussed. It is emphasized that negative feedback forms an essential feature of reliable colour equipment, especially for continuous operation by relatively unskilled personnel. Particular attention has been given to monitoring facilities for checking the amplifier operation. All of the electrical registration controls are situated at the camera control unit instead of in the camera itself, thus considerably simplifying the problem of remote control of the camera. The picture quality obtainable is adequate for 625-line broadcast standards and the equipment is of universal application for general industrial use.
