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Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 5, May 1936)
[ACTIVE]

A Review of Projector and Screen Characteristics and their Effects upon Screen Brightness

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
Two fundamental factors determine the light output of the motion picture projector: (1) source brightness and (2) the effective aperture of the projection optical system. When these are known accurately, the number of lumens available for screen illumination can be computed, after making allowances for losses that occur in the collective element, the shutter, and the objective lens. The method of computation is described, and results are given for typical projectors. It should be noted, however, that adjustments are made in the practical operation of projectors that can produce wide variations in the two fundamental factors. Therefore, the conditions of operation must be precisely known in order to apply the results to any particular installation. Screen brightness can be derived directly from the lumen output when the screen factors—area, reflectivity, and directional properties—are considered.
Publication Date
1936-05-01
DOI
10.5594/J08678
Link
https://doi.org/10.5594/J08678
Author(s)
A. A. Cook
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A. A. Cook; A Review of Projector and Screen Characteristics and their Effects upon Screen Brightness, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 5, May 1936); SMPTE, 1936. Available at https://doi.org/10.5594/J08678
Snippet:
A. A. Cook; A Review of Projector and Screen Characteristics and their Effects upon Screen Brightness, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 5, May 1936); SMPTE, 1936. Available at https://doi.org/10.5594/J08678

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A. A. Cook; A Review of Projector and Screen Characteristics and their Effects upon Screen Brightness, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 5, May 1936); SMPTE, 1936. Available at https://doi.org/10.5594/J08678
Snippet:
<span class="citation">A. A. Cook; <cite>A Review of Projector and Screen Characteristics and their Effects upon Screen Brightness</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 5, May 1936); SMPTE, 1936. Available at <a href="https://doi.org/10.5594/J08678" target="_blank" rel="noopener">https://doi.org/10.5594/J08678</a></span>

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Preview:
A. A. Cook; A Review of Projector and Screen Characteristics and their Effects upon Screen Brightness, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 5, May 1936); SMPTE, 1936
doi: 10.5594/J08678
url: https://doi.org/10.5594/J08678
Snippet:
<li>
A. A. Cook; <cite id="bib-10-5594-j08678">A Review of Projector and Screen Characteristics and their Effects upon Screen Brightness</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 5, May 1936); SMPTE, 1936
<span class="doi">10.5594/J08678</span>
</li>