Journal of the Society of Motion Picture Engineers ( Volume: 45, Issue: 5, November 1945)

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Continuous Flash Lighting—An Improved High-Intensity Light Source for High-Speed Motion Picture Photography

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: High-speed motion picture cameras capable of taking pictures on continuously moving film at the rate of upward of 3000 frames per sec produce individual exposures on the order of sec or less. Exposures of such brevity, however, call for continuous illumination of great intensity, and incandescent lamps, which are adequate, have many disadvantages. Among these are: excessive consumption of electric power, heavy conductors and connectors, emission of considerable heat, and appliances and reflectors of great bulk and weight. Since the actual time during which such high-intensity illumination is required seldom exceeds one second, certain flash lamps will provide satisfactory illumination when operated in suitably designed equipment. Flashing successively on the current of a 6-v dry-cell battery, one or more flash lamps will yield light of high actinic value and of easily controlled direction and duration. Special equipment, known as the Continuous Flash Lighting Unit, accomplishes such purposes effectively, providing adequate illumination both for black-and-white and natural color high-speed motion pictures. This paper reviews the development of the Continuous Flash Lighting Unit, and describes its operation and advantages.
Publication Date: 1945-11-01
DOI: 10.5594/J12818
Link: https://doi.org/10.5594/J12818
Author(s): Henry M. Lester

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Henry M. Lester; Continuous Flash Lighting—An Improved High-Intensity Light Source for High-Speed Motion Picture Photography, Journal of the Society of Motion Picture Engineers ( Volume: 45, Issue: 5, November 1945); SMPTE, 1945. Available at https://doi.org/10.5594/J12818

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Henry M. Lester; Continuous Flash Lighting—An Improved High-Intensity Light Source for High-Speed Motion Picture Photography, Journal of the Society of Motion Picture Engineers ( Volume: 45, Issue: 5, November 1945); SMPTE, 1945. Available at https://doi.org/10.5594/J12818

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<span class="citation">Henry M. Lester; <cite>Continuous Flash Lighting—An Improved High-Intensity Light Source for High-Speed Motion Picture Photography</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 45, Issue: 5, November 1945); SMPTE, 1945. Available at <a href="https://doi.org/10.5594/J12818" target="_blank" rel="noopener">https://doi.org/10.5594/J12818</a></span>

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Henry M. Lester; <cite id="bib-10-5594-j12818">Continuous Flash Lighting—An Improved High-Intensity Light Source for High-Speed Motion Picture Photography</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 45, Issue: 5, November 1945); SMPTE, 1945
<span class="doi">10.5594/J12818</span>
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