Electronic Shutter in Television Film Pickup

F. Cecil Grace

In storage-type television film pickup systems, usual either the light source is pulsed or else a mechanical shutter is used on the projector. This paper describes a third method, wherein the film is projected continuously, even during pulldown, on the photocathode of an image-orthicon tube. The image section of the tube, however, is keyed electronically so that it operates only during vertical blanking. Simple apparatus for the use with studio cameras is described.

Print ISSN
Published
1954-09
Content type
Original Research
DOI
10.5594/J04855