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Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 7, July 1939)
[ACTIVE]

Properties of Lamps and Optical Systems for Sound Reproduction

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
Sound reproduction systems are designed on the premise that the sound-track will be illuminated by a scanning-beam of substantially uniform flux density. This paper presents results of extensive studies of the actual beam characteristics for all types of optical systems and lamps employed in the reproduction of sound from film. They were made possible by a unique microphotometer, designed by the author, with which the scanning beam can be analyzed in minute elements. The studies cover: relative levels of scanning beam illumination; effect of source displacement from design position on total flux at the sound-track; microphotometer recordings of distribution of flux density across the beam as affected by optical systems and source forms and by displacements of the source.
Publication Date
1939-07-01
DOI
10.5594/J11979
Link
https://doi.org/10.5594/J11979
Author(s)
F. E. Carlson
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F. E. Carlson; Properties of Lamps and Optical Systems for Sound Reproduction, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 7, July 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11979
Snippet:
F. E. Carlson; Properties of Lamps and Optical Systems for Sound Reproduction, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 7, July 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11979

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F. E. Carlson; Properties of Lamps and Optical Systems for Sound Reproduction, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 7, July 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11979
Snippet:
<span class="citation">F. E. Carlson; <cite>Properties of Lamps and Optical Systems for Sound Reproduction</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 7, July 1939); SMPTE, 1939. Available at <a href="https://doi.org/10.5594/J11979" target="_blank" rel="noopener">https://doi.org/10.5594/J11979</a></span>

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Preview:
F. E. Carlson; Properties of Lamps and Optical Systems for Sound Reproduction, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 7, July 1939); SMPTE, 1939
doi: 10.5594/J11979
url: https://doi.org/10.5594/J11979
Snippet:
<li>
F. E. Carlson; <cite id="bib-10-5594-j11979">Properties of Lamps and Optical Systems for Sound Reproduction</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 7, July 1939); SMPTE, 1939
<span class="doi">10.5594/J11979</span>
</li>