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Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 16, May 1923)
[ACTIVE]

A Split Aspheric Condensing Lens

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
One of the immediate results of the introduction of the high current incandescent lamp into the motion picture industry has been the emphasis placed upon an old problem of applied optics; that is, the production of a field of uniform illumination from a non-uniform light source. The crater of the carbon are, which preceded the incandescent lamp in projection service, is sufficiently uniform in brilliancy from edge to edge to give an almost constant illumination at all parts of the screen, but the incandescent filament not only varies in brightness in different parts but it has open spaces of about half the filament area in extent. The illumination at the aperture and on the screen has a natural tendency to show an image of the filament, and the suppression of this image is the problem with which we are here concerned.
Publication Date
1923-05-01
DOI
10.5594/J11639
Link
https://doi.org/10.5594/J11639
Author(s)
Frank Benford
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Frank Benford; A Split Aspheric Condensing Lens, Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 16, May 1923); SMPTE, 1923. Available at https://doi.org/10.5594/J11639
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Frank Benford; A Split Aspheric Condensing Lens, Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 16, May 1923); SMPTE, 1923. Available at https://doi.org/10.5594/J11639

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Frank Benford; A Split Aspheric Condensing Lens, Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 16, May 1923); SMPTE, 1923. Available at https://doi.org/10.5594/J11639
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<span class="citation">Frank Benford; <cite>A Split Aspheric Condensing Lens</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 16, May 1923); SMPTE, 1923. Available at <a href="https://doi.org/10.5594/J11639" target="_blank" rel="noopener">https://doi.org/10.5594/J11639</a></span>

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Preview:
Frank Benford; A Split Aspheric Condensing Lens, Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 16, May 1923); SMPTE, 1923
doi: 10.5594/J11639
url: https://doi.org/10.5594/J11639
Snippet:
<li>
Frank Benford; <cite id="bib-10-5594-j11639">A Split Aspheric Condensing Lens</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 16, May 1923); SMPTE, 1923
<span class="doi">10.5594/J11639</span>
</li>