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 #:
00029
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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24 P. C. GOLDMARK [J. S. M. P. E. mentioned before, were run through the projector. Each time the distance between the dissector cathode and a fixed point on the projector was carefully adjusted until the images were motionless and in sharp focus. Through suitable gears the slight changes of the dissector distance are transmitted to a rotating dial onto which the individual positions of the cathode have been marked. From this calibration a curve has been derived which represents the film shrink FIG. 6. Electrical equipment of the telecine channel. age (measured in mm per 50 frames) plotted against the distance between the dissector cathode and the projector. In practice, before a film of unknown shrinkage is used, a piece of it is held against a metal ruler on which the shrinkage can be read directly in mm per 50 frames. Then the distance adjustment screw S (Fig. 4) of the dissector is turned until the dial D of the indicator reads the corresponding distance. Ah1 that is necessary now is to focus the main projection lens T of the projector, when the title appears and automatically both a sharp image and exact coincidence are achieved.