Applications of Laser Technology to Photographic Optical Sound Recording

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Photographic optical sound recording has been used for composite sound tracks on cinema prints since the introduction of sound on motion-picture film. It has evolved through variable-area to variable-density modulation, using various forms of modulators, and back to variable-area, in worldwide use today. The majority of modulators currently in use are light valves and galvanometers, both types capable of stereophonic variable-area recording. Various other modulator schemes have been tried, but few were ever commercially put into service. Today a successful new optical recorder has been developed, using a laser beam that is capable of exposing a sharper image with a more even field and an extended frequency response. This article describes this new technology, which can be used for recording standard stereo variable-area sound tracks, making optical test films, and future recording of digital audio sound negatives.
Publication Date: 1992-01-01
DOI: 10.5594/J02357
Link: https://doi.org/10.5594/J02357
Author(s): Michael Strong, Jack Leahy

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Michael Strong and Jack Leahy; Applications of Laser Technology to Photographic Optical Sound Recording, SMPTE Journal ( Volume: 101, Issue: 1, January 1992); SMPTE, 1992. Available at https://doi.org/10.5594/J02357

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Michael Strong and Jack Leahy; Applications of Laser Technology to Photographic Optical Sound Recording, SMPTE Journal ( Volume: 101, Issue: 1, January 1992); SMPTE, 1992. Available at https://doi.org/10.5594/J02357

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<span class="citation">Michael Strong and Jack Leahy; <cite>Applications of Laser Technology to Photographic Optical Sound Recording</cite>, SMPTE Journal ( Volume: 101, Issue: 1, January 1992); SMPTE, 1992. Available at <a href="https://doi.org/10.5594/J02357" target="_blank" rel="noopener">https://doi.org/10.5594/J02357</a></span>

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Michael Strong and Jack Leahy; Applications of Laser Technology to Photographic Optical Sound Recording, SMPTE Journal ( Volume: 101, Issue: 1, January 1992); SMPTE, 1992
doi: 10.5594/J02357
url: https://doi.org/10.5594/J02357

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<li>
Michael Strong and Jack Leahy; <cite id="bib-10-5594-j02357">Applications of Laser Technology to Photographic Optical Sound Recording</cite>, SMPTE Journal ( Volume: 101, Issue: 1, January 1992); SMPTE, 1992
<span class="doi">10.5594/J02357</span>
</li>