Journal of the Society of Motion Picture Engineers ( Volume: 53, Issue: 5, November 1949)

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Water-Cooled High-Pressure Mercury-Discharge Lamp for Direct-Current Operation

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: A water-cooled high-pressure mercury-vapor lamp operated on direct current which has been used for motion picture projection is described. When mounted in a suitable reflector, it is a powerful light source for high-speed photographic applications. The lamp has a bore of somewhat less than 2 mm and an arc length of 12 1/2 mm. It can be operated continuously at 1000 watts and has a brightness of about 320,000 candles per square inch along the axis of the arc. With the reflector described, an area 5 inches in diameter can be illuminated to 50,000 foot-candles with one lamp unit. With a lamp of double length consuming 2 kilowatts, the illumination level may be increased considerably.
Publication Date: 1949-11-01
DOI: 10.5594/J11700
Link: https://doi.org/10.5594/J11700
Author(s): W. Elenbaas, E. W. Van Heuven

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W. Elenbaas and E. W. Van Heuven; Water-Cooled High-Pressure Mercury-Discharge Lamp for Direct-Current Operation, Journal of the Society of Motion Picture Engineers ( Volume: 53, Issue: 5, November 1949); SMPTE, 1949. Available at https://doi.org/10.5594/J11700

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W. Elenbaas and E. W. Van Heuven; Water-Cooled High-Pressure Mercury-Discharge Lamp for Direct-Current Operation, Journal of the Society of Motion Picture Engineers ( Volume: 53, Issue: 5, November 1949); SMPTE, 1949. Available at https://doi.org/10.5594/J11700

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<span class="citation">W. Elenbaas and E. W. Van Heuven; <cite>Water-Cooled High-Pressure Mercury-Discharge Lamp for Direct-Current Operation</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 53, Issue: 5, November 1949); SMPTE, 1949. Available at <a href="https://doi.org/10.5594/J11700" target="_blank" rel="noopener">https://doi.org/10.5594/J11700</a></span>

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<li>
W. Elenbaas and E. W. Van Heuven; <cite id="bib-10-5594-j11700">Water-Cooled High-Pressure Mercury-Discharge Lamp for Direct-Current Operation</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 53, Issue: 5, November 1949); SMPTE, 1949
<span class="doi">10.5594/J11700</span>
</li>