Color-Television Film Scanner

Bernard Erde

The transformation of moving color-film images into video signals is accomplished with the most faithful rendition when the pickup tube is of the continuous-cathode, or nonstorage type. This, however, imposes the limitation that the film motion, in the associated film scanner, be constant in velocity, rather than intermittent. In the color-film scanner of the Columbia Broadcasting System, the pickup tube is the Farnsworth daylight image dissector. An optical-electronic method, requiring no moving optical parts, is used to compensate for the continuous motion of the film.

Print ISSN
Published
1948-10
Content type
Original Research
DOI
10.5594/J11732