Journal of the Society of Motion Picture and Television Engineers (1950-1954)

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Fig. 7. Flying-spot scanner tube, with housing raised. the optical compensator. This is preset at the beginning of a reel of film and thereafter requires no further attention. (4) The exclusive isotransport feature is an inherent part of the television film scanner. This guarantees completely automatic registration between film motion and the optical compensator, always insuring their correct synchronism and phase relationship, regardless of film speed. It also avoids the necessity for vertical framing and provides pictures of extreme steadiness with freedom from flicker. (5) Flying spot scanning is in itself a guarantee of the finest possible picture quality known to science today. It provides pictures of the finest resolution, superb half-tone reproduction, and a full range of contrast. The background level is automatically and accurately transmitted, and the picture is completely free from shading errors of any kind. (6) This television film scanner is a cold scanner. The film cooling and burning problem does not exist, because of the complete absence of heat from pro jection lamps or arcs. The light on the film from the flying-spot scanning tube is absolutely cold. (7) This television film scanner is a universal scanner. (a) The scanner was designed from the outset for color operation but inherently also provides black-and-white pictures of excellent quality and complete freedom from noise. It gives color signals which can then be electronically repackaged to suit any of the several color television systems — simultaneous color, field-sequential color, line-sequential color or National Television System Committee compatible color system. (b) The scanner operates at any film speed from zero upwards. Because of its cold operation, it is also possible to transmit stationary film frames, if desired. (c) The scanner can simply and easily be converted to any existing foreign or domestic television standard, regardless of the number of lines or frames per second. (d) The scanner is completely non Traub: Television Film Scanner 53