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Transactions of the Society of Motion Picture Engineers ( Volume: 4, Issue: 10, May 1920)
[ACTIVE]

Further Measurements of Illumination in Motion-Picture Projection

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
The method previously described has been improved and applied to the measurement of the total illumination obtained on the screen with different source sizes and different condenser systems compared to the maximum obtainable with the given source brilliancy and given objective diameters. A comparison of the photoelectric measurements with the measurements obtained using an optical photometer for condensers of different absorption and sources of two slightly different brilliancies shows the ratio of the photoelectric cell readings to the photometer readings to be independent of color thru the range considered. Uniformity of screen, illumination is also taken up in a general way by the application of direct observation of the screen to the automatically drawn curves registering total illumination.
Publication Date
1920-05-01
DOI
10.5594/J14219
Link
https://doi.org/10.5594/J14219
Author(s)
W. E. Story
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W. E. Story; Further Measurements of Illumination in Motion-Picture Projection, Transactions of the Society of Motion Picture Engineers ( Volume: 4, Issue: 10, May 1920); SMPTE, 1920. Available at https://doi.org/10.5594/J14219
Snippet:
W. E. Story; Further Measurements of Illumination in Motion-Picture Projection, Transactions of the Society of Motion Picture Engineers ( Volume: 4, Issue: 10, May 1920); SMPTE, 1920. Available at https://doi.org/10.5594/J14219

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W. E. Story; Further Measurements of Illumination in Motion-Picture Projection, Transactions of the Society of Motion Picture Engineers ( Volume: 4, Issue: 10, May 1920); SMPTE, 1920. Available at https://doi.org/10.5594/J14219
Snippet:
<span class="citation">W. E. Story; <cite>Further Measurements of Illumination in Motion-Picture Projection</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 4, Issue: 10, May 1920); SMPTE, 1920. Available at <a href="https://doi.org/10.5594/J14219" target="_blank" rel="noopener">https://doi.org/10.5594/J14219</a></span>

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Preview:
W. E. Story; Further Measurements of Illumination in Motion-Picture Projection, Transactions of the Society of Motion Picture Engineers ( Volume: 4, Issue: 10, May 1920); SMPTE, 1920
doi: 10.5594/J14219
url: https://doi.org/10.5594/J14219
Snippet:
<li>
W. E. Story; <cite id="bib-10-5594-j14219">Further Measurements of Illumination in Motion-Picture Projection</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 4, Issue: 10, May 1920); SMPTE, 1920
<span class="doi">10.5594/J14219</span>
</li>