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

Page scan 00078 from Journal of the Society of Motion Picture Engineers

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 #:
00078
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 C-R-TuBE APPLICATIONS 75 pulses. Several experimental cathode-ray tubes for use in producing these short light pulses have been built in connection with the relaying of video information over light beams.13 In order to demonstrate the capabilities and advantages of such cathode-ray tubes over conventional lamps for stroboscopy at high speeds, the light-outputversus-time characteristics of such a cathode-ray tube have been Fig. 8 — Double exposures comparing light from stroboscope lamp with light from cathode-ray-tube light source. (a) (b) Fig. 9 — Photographs of a wire rotating at high speed, made with (a) a stroboscope lamp, and (b) a cathode-raytube light source. The circle encloses the same wire in both cases. compared oscillographically with that of the light from a gas stroboscope lamp. The results are shown in Figs. 8 and 9. Fig. 8 shows on the same time base, the oscillogram of a 2-microsecond flash from a cathode-ray tube (a small spike) and the comparatively long light output from a stroboscope. Not only is the stroboscope flash much longer in duration but it also rises and falls much less steeply and tends to oscillate. The effect of these light sources on a photograph is shown in Fig. 9. These two photographs are pictures of a wire being