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Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927)
[ACTIVE]

A Polygonal Floodlighting Mirror

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
The reasons that make it desirable for the motion picture studio to employ large floodlighting units are the high levels of illumination required for high speed photography and the peculiar sensitivity characteristic of the photographic film. These two factors indicate the use of a high intensity arc, and there is a national tendency to take the high intensity searchlight just ae it has been developed for military service and by refocusing got a beam of wide spread. The defects of this method are illustrated and it is shown that a more suitable optical arrangement is to use apolygonal mirror rather than aparaboloid. The method ofcomputing the dimensions of the polygons is given along with data on a photometric comparison of the two types of reflectors.
Publication Date
1927-07-01
DOI
10.5594/J06617
Link
https://doi.org/10.5594/J06617
Author(s)
Frank Benford, M. W. Palmer
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J06617.json

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Frank Benford and M. W. Palmer; A Polygonal Floodlighting Mirror, Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927); SMPTE, 1927. Available at https://doi.org/10.5594/J06617
Snippet:
Frank Benford and M. W. Palmer; A Polygonal Floodlighting Mirror, Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927); SMPTE, 1927. Available at https://doi.org/10.5594/J06617

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Frank Benford and M. W. Palmer; A Polygonal Floodlighting Mirror, Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927); SMPTE, 1927. Available at https://doi.org/10.5594/J06617
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<span class="citation">Frank Benford and M. W. Palmer; <cite>A Polygonal Floodlighting Mirror</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927); SMPTE, 1927. Available at <a href="https://doi.org/10.5594/J06617" target="_blank" rel="noopener">https://doi.org/10.5594/J06617</a></span>

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Preview:
Frank Benford and M. W. Palmer; A Polygonal Floodlighting Mirror, Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927); SMPTE, 1927
doi: 10.5594/J06617
url: https://doi.org/10.5594/J06617
Snippet:
<li>
Frank Benford and M. W. Palmer; <cite id="bib-10-5594-j06617">A Polygonal Floodlighting Mirror</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927); SMPTE, 1927
<span class="doi">10.5594/J06617</span>
</li>