Abstract
AN article under this title appeared in NATURE of October 21, p, 648. A paper by Dr. V. K. Zworykin has now appeared in Great Britain (J. Inst. Elect. Eng., No. 432). He describes clearly the theory, characteristics and mode of operation of his system, which has now reached the commercial stage. The device used for the registration of the image is called an ‘iconoscope’. It consists of a vacuum tube, an electron-emit ting ‘gun’ and a photo-sensitive surface of a unique type. This surface is scanned by an electron beam from the gun which serves as a type of inertialess commutator. The principle of operation permits the storing of energy and very largely increases the output as compared with the ordinary types of television scanners. The reproduction of the image is accomplished by another cathode ray tube with a fluorescent screen called the ‘kinescope’. It modulates the impulses from the electric beam and this in turn is transformed by the fluorescent screen into variations of light. The scanning is linear and is synchronised at the end of each line, the impulses being transmitted through the same channel as the picture signal. The whole system is completely automatic and is almost as easy to operate as an ordinary radio receiver. The practical details have been all worked out and it looks as if a high grade television transmission set of this type will soon be on the market.
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The Iconoscope for Television. Nature 132, 962–963 (1933). https://doi.org/10.1038/132962e0
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DOI: https://doi.org/10.1038/132962e0