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Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 3, September 1934)
[ACTIVE]

The Biplane Filament in Spotlighting

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
The high degree of uniformity and source of brightness that have made the biplane filament so desirable for motion picture projection prove to be valuable also in spotlighting. The two parallel rows of coils placed so that the coils of one plane fill the spaces between the coils of the other provide a light source of greater uniformity and double the average brightness of the monoplane filament construction. Results are given showing the increased uniformity of the spot and the higher intensities attained with biplane filament lamps as compared with monoplane filament lamps of the same rating. The three types of spotlights most commonly used—namely, the lens spotlight, the shallow paraboloid, and the stereopticon spotlight—have been subjected to test to determine their operating results.
Publication Date
1934-09-01
DOI
10.5594/J05445
Link
https://doi.org/10.5594/J05445
Author(s)
Gjon Mili
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J05445.json

Reference this Doc

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Preview:
Gjon Mili; The Biplane Filament in Spotlighting, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 3, September 1934); SMPTE, 1934. Available at https://doi.org/10.5594/J05445
Snippet:
Gjon Mili; The Biplane Filament in Spotlighting, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 3, September 1934); SMPTE, 1934. Available at https://doi.org/10.5594/J05445

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Preview:
Gjon Mili; The Biplane Filament in Spotlighting, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 3, September 1934); SMPTE, 1934. Available at https://doi.org/10.5594/J05445
Snippet:
<span class="citation">Gjon Mili; <cite>The Biplane Filament in Spotlighting</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 3, September 1934); SMPTE, 1934. Available at <a href="https://doi.org/10.5594/J05445" target="_blank" rel="noopener">https://doi.org/10.5594/J05445</a></span>

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Preview:
Gjon Mili; The Biplane Filament in Spotlighting, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 3, September 1934); SMPTE, 1934
doi: 10.5594/J05445
url: https://doi.org/10.5594/J05445
Snippet:
<li>
Gjon Mili; <cite id="bib-10-5594-j05445">The Biplane Filament in Spotlighting</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 3, September 1934); SMPTE, 1934
<span class="doi">10.5594/J05445</span>
</li>