Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000636
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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1949 LIGHTING DISTORTION IN TELEVISION 633 remarkable degree of color correction with only a 20 per cent loss in signal strength. Although the 4500-degree white lamp produces more unconnected radiation in the applicable band than does the 3500-degree, its color rendering is inferior. After correction by a Wratten No. 6 filter, it produces a lower signal level than can be obtained from a similarly corrected 3500-degree white lamp. It is apparent from Fig. 7 that little color distortion is present when tungsten-filament lamps are employed. Since fluorescent and filament lamps are usually used in combination, the effect of the No. 6 filter is shown. A comparison MM WAVELENGTH -ANGSTROMS Fig. 10 — Photoeffectiveness of 5820 image orthicon 3000-degree-Kelvin tungsten-filament lamp. of the relative signal-strength figures in Table I, however, shows the advantage of using fluorescent lamps wherever possible. CONCLUSIONS 1. The general lighting on which camera adjustments depend should provide uniform illumination of vertical surfaces of an intensity somewhat greater than the horizontal illumination from overhead. 2. Materials employed on a stage should be selected to produce brightness ratios no greater than 20 to 1. 3. Two forms of specific lighting are needed to produce an illusion of 3 dimensions on the receiving screen — modeling and back lights.