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Journal of the SMPTE ( Volume: 67, Issue: 3, March 1958)
[ACTIVE]

Averaging Screen-Illumination Readings

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
67, No. 3, pp. 144–148
Abstract
In obtaining the total output of a projector, or the total illumination which falls on a projection screen, it is customary to read the incident intensity at selected points in the illuminated area. These readings are then averaged by a suitable weighting formula to give the average over the face of the screen. This paper discusses some of the more commonly used formulas, considers their relative accuracy and the effects of various screen aspect ratios on the results obtained with them. It also analyzes various types of errors on the basis of an idealized distribution pattern which experience has shown checks closely with practical results.
Publication Date
1958-03-01
DOI
10.5594/J11171
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J11171
Author(s)
Armin J. HillMotion Picture Research Council; College of Physical and Engineering Sciences, Brigham Young University, Provo, Utah
Copyright
© 1958 Society of Motion Picture and Television Engineers, Inc.
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Preview:
Armin J. Hill; Averaging Screen-Illumination Readings, Journal of the SMPTE ( Volume: 67, Issue: 3, March 1958); SMPTE, 1958. Available at https://doi.org/10.5594/J11171
Snippet:
Armin J. Hill; Averaging Screen-Illumination Readings, Journal of the SMPTE ( Volume: 67, Issue: 3, March 1958); SMPTE, 1958. Available at https://doi.org/10.5594/J11171

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Preview:
Armin J. Hill; Averaging Screen-Illumination Readings, Journal of the SMPTE ( Volume: 67, Issue: 3, March 1958); SMPTE, 1958. Available at https://doi.org/10.5594/J11171
Snippet:
<span class="citation">Armin J. Hill; <cite>Averaging Screen-Illumination Readings</cite>, Journal of the SMPTE ( Volume: 67, Issue: 3, March 1958); SMPTE, 1958. Available at <a href="https://doi.org/10.5594/J11171" target="_blank" rel="noopener">https://doi.org/10.5594/J11171</a></span>

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Preview:
Armin J. Hill; Averaging Screen-Illumination Readings, Journal of the SMPTE ( Volume: 67, Issue: 3, March 1958); SMPTE, 1958
doi: 10.5594/J11171
url: https://doi.org/10.5594/J11171
Snippet:
<li>
Armin J. Hill; <cite id="bib-10-5594-j11171">Averaging Screen-Illumination Readings</cite>, Journal of the SMPTE ( Volume: 67, Issue: 3, March 1958); SMPTE, 1958
<span class="doi">10.5594/J11171</span>
</li>

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