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

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Telemeter The Telemeter system of pay-as-yousee television, developed by the International Telemeter Corp., started commercial operation in Palm Springs, Calif., on November 28, 1953. A special Telemeter channel, carrying the best in motion-picture entertainment and sports, was added to the free Los Angeles television distributed by the Palm Springs community system. In building the Palm Springs community television system, ITC was led to develop its own line of broad-band VHF amplifiers and accessory community television equipment, since the equipment then commercially available was unable to do an adequate job. This community television equipment developed by ITC was marketed under the name of AmpliVision in the latter part of 1953. Kinescope Recording On the West Coast, kinescope recording increased in amount for programs delayed three hours in presentation.98 35mm kinescope recording has also increased in New York for prerecorded network shows which are reproduced from the kinescope negative. Improved black-and-white kinescope recordings are being obtained by using ultraviolet light produced by a special phosphor and recorded on a specially prepared photographic emulsion. Some stations are changing from 5-in. to 10-in. recording kinescopes to obtain a greater ratio of image size to phosphor grain size and reduce eyestrain. Gamma-correction circuits are being used to render more detail in face tones and black areas. A new field for kinescope recording is developing as colleges and universities develop plans for an educational film network to facilitate the interchange of program material. Film Production for Television The iconoscope has continued to be : the "work-horse" for motion-picture 1 film reproduction, although a few sta j tions use the image orthicon for this 1 purpose." There have been, how _{ ever, several notable developments in I electrical and mechanical design which I indicate that the flying-spot scanner and the vidicon tube will soon be widely ] used for film reproduction and that •< continuous-motion projectors may also *, play an important part in color tele , vision film reproduction. The Philco Model FSS-5 Television < Film Scanner100 is a 35mm continuousmotion projector mechanism employing a 24-faced rotating prism and a flying-spot scanning system. It may be used for monochrome television, or by the addition of a "color head" it becomes suitable for use with color 1 television. A shrinkage compensator : permits adjustment for films of varying pitch. The Du Mont Multiscanner101 is a versatile and ingenious device employing a centrally positioned flying-spot cathode-ray tube whose light output is optically multiplexed to two motionpicture film handling machines and two opaque slide or baloptican picture holders. These four picture sources can simultaneously produce independent television images by means of their respective multiplier phototubes, all of which receive light from the same flying-spot source. A special 16mm film handling machine known as the "cinecon" has been designed specifically for use with this system. It is a continuous-motion machine resembling in external appearance a conventional projector, but employing a 24-faced rotating prism and having, in place of the lamphouse, a multiplier phototube which produces the monochrome electronic picture image. 356 May 1954 Journal of the SMPTE Vol. 62