API Registry JSON CSV exports Resources
Theme

Choose how MSRBot.io looks on this device.

Auto (match system) Light mode Dark mode

Preference is stored in this browser only.

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

Optics of Projectors for 16 MM. Film

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
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
Link
https://doi.org/10.5594/J01338
Author(s)
A. A. Cook
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J01338.json

Reference this Doc

Plain text (ISO 690 compliant)

Preview:
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
Snippet:
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

HTML (ISO 690 compliant)

Preview:
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
Snippet:
<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>

SMPTE Icon SMPTE's HTML Pub

Preview:
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
Snippet:
<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>