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

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Further Measurements of Illumination in Motion-Picture Projection

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Volume: 4, No. 10, pp. 103–116
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
ISSN: Print: 0096-6460
Link: https://doi.org/10.5594/J14219
Author(s): W. E. Story
Copyright: © 1920 Society of Motion Picture and Television Engineers, Inc.

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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

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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

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<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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<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>