Journal of the Society of Motion Picture Engineers ( Volume: 51, Issue: 6, December 1948)

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Sensitometric Aspect of Television Monitor-Tube Photography

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The performances of the iconoscope and orthicon pickup tubes and kinescope monitor tubes constituting a television system are considered in regard to the response versus level characteristics. A nonlinear electrical network is advocated for combination with the iconoscope to equalize the gamma variations to a constant gamma approximately complementary with the monitor-tube gamma. Another nonlinear electrical network is advocated for combination with the orthicon to reduce the gamma of this camera to the same gamma as the corrected iconoscope camera. A direct positive photographic technique is described using a negative monitor picture obtained by electrical phase reversal, and the toe region of the positive film characteristic. A general mathematical expression for the shape of the film toe as a function of the gammas of the television camera and monitor as required for linear over-all performance is derived. The merits of such a photographic technique are economy, simplicity, rapidity of processing, and greater average screen brightness.
Publication Date: 1948-12-01
DOI: 10.5594/J11713
Link: https://doi.org/10.5594/J11713
Author(s): Fred G. Albin

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Fred G. Albin; Sensitometric Aspect of Television Monitor-Tube Photography, Journal of the Society of Motion Picture Engineers ( Volume: 51, Issue: 6, December 1948); SMPTE, 1948. Available at https://doi.org/10.5594/J11713

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Fred G. Albin; Sensitometric Aspect of Television Monitor-Tube Photography, Journal of the Society of Motion Picture Engineers ( Volume: 51, Issue: 6, December 1948); SMPTE, 1948. Available at https://doi.org/10.5594/J11713

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<span class="citation">Fred G. Albin; <cite>Sensitometric Aspect of Television Monitor-Tube Photography</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 51, Issue: 6, December 1948); SMPTE, 1948. Available at <a href="https://doi.org/10.5594/J11713" target="_blank" rel="noopener">https://doi.org/10.5594/J11713</a></span>

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<li>
Fred G. Albin; <cite id="bib-10-5594-j11713">Sensitometric Aspect of Television Monitor-Tube Photography</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 51, Issue: 6, December 1948); SMPTE, 1948
<span class="doi">10.5594/J11713</span>
</li>