The Infrared Transparency of Magnetic Tracks

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The author has discovered that magnetic tracks are substantially transparent to infrared light. Utilizing the infrared sensitivity of the lead-sulfide photoconductive cell, it is shown that excellent reproduction of an optical track can be achieved even though it is completely covered by a magnetic stripe. By thus eliminating the need for half-width stripes, superior magnetic recording quality is obtained while avoiding most of the drawbacks of combined magnetic and optical tracks on composite prints. Potential advantages and applications of the discovery are discussed, and avenues of research for further improvement are pointed out.
Publication Date: 1957-09-01
DOI: 10.5594/J11206
Link: https://doi.org/10.5594/J11206
Author(s): George Lewin

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George Lewin; The Infrared Transparency of Magnetic Tracks, Journal of the SMPTE ( Volume: 66, Issue: 9, September 1957); SMPTE, 1957. Available at https://doi.org/10.5594/J11206

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George Lewin; The Infrared Transparency of Magnetic Tracks, Journal of the SMPTE ( Volume: 66, Issue: 9, September 1957); SMPTE, 1957. Available at https://doi.org/10.5594/J11206

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George Lewin; The Infrared Transparency of Magnetic Tracks, Journal of the SMPTE ( Volume: 66, Issue: 9, September 1957); SMPTE, 1957. Available at https://doi.org/10.5594/J11206

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<span class="citation">George Lewin; <cite>The Infrared Transparency of Magnetic Tracks</cite>, Journal of the SMPTE ( Volume: 66, Issue: 9, September 1957); SMPTE, 1957. Available at <a href="https://doi.org/10.5594/J11206" target="_blank" rel="noopener">https://doi.org/10.5594/J11206</a></span>

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George Lewin; The Infrared Transparency of Magnetic Tracks, Journal of the SMPTE ( Volume: 66, Issue: 9, September 1957); SMPTE, 1957
doi: 10.5594/J11206
url: https://doi.org/10.5594/J11206

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George Lewin; <cite id="bib-10-5594-j11206">The Infrared Transparency of Magnetic Tracks</cite>, Journal of the SMPTE ( Volume: 66, Issue: 9, September 1957); SMPTE, 1957
<span class="doi">10.5594/J11206</span>
</li>