Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932)

[ACTIVE]

Optics of Projectors for 16 MM. Film

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 18, No. 4, pp. 461–470
Abstract: The limits of illumination available in a projector are fixed by three factors: the size and brilliance of the light source, the effective aperture of the optical system and the design of the condensing lenses. In modern 16 mm. machines of the standard type, about 100 to 120 lumens are available through an f/2 optical system; these values, which are not corrected for shutter and film losses, mean that 1.6 to 2.0 per cent of the total radiation is being used. The use of low voltage lamps has not changed this ratio to any extent. The effect of varying each of the above factors is discussed, and the increase in screen brightness that is likely to be obtained is estimated.
Publication Date: 1932-04-01
DOI: 10.5594/J01338
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J01338
Author(s): A. A. CookBausch & Lomb Optical Co., Rochester, N. Y.
Copyright: © 1932 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Trend of Lamp Development and Operation in Motion Picture Projectors Employing 16 MM. Film [Active]
2 Kellner Hermann : “The Function of the Condenser in the Projection Apparatus,” Trans. Soc. Mot. Pict. Eng . (Nov., 1918 ), No. 7, p. 44 . EXTERNAL
3 Kellner Hermann : “Can the Efficiency of the Present Condensing Systems Be Increased?” Trans. Soc. Mot. Pict. Eng . (Oct., 1923 ), No. 17, p. 136 . EXTERNAL

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A. A. Cook; Optics of Projectors for 16 MM. Film, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J01338

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A. A. Cook; Optics of Projectors for 16 MM. Film, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J01338

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A. A. Cook; Optics of Projectors for 16 MM. Film, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J01338

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<span class="citation">A. A. Cook; <cite>Optics of Projectors for 16 MM. Film</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at <a href="https://doi.org/10.5594/J01338" target="_blank" rel="noopener">https://doi.org/10.5594/J01338</a></span>

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A. A. Cook; Optics of Projectors for 16 MM. Film, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932
doi: 10.5594/J01338
url: https://doi.org/10.5594/J01338

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<li>
A. A. Cook; <cite id="bib-10-5594-j01338">Optics of Projectors for 16 MM. Film</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932
<span class="doi">10.5594/J01338</span>
</li>