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 #:
000580
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 CATHODE-RAY OSCILLOGRAPHY 577 voltages and frequencies used; should be capable of displaying the phenomenon without blurring for the continuous-motion recording; and, should have sweeps fast enough so that the resolution capabilities of the cathode-ray-tube screen, lens, and photographic film are not exceeded; the accelerating voltage and drive should be adequate. The amplifier should be so stable, that over the data-taking period no drift should be encountered. The whole assembly should be rigid so that no spurious movements of the recording trace occur due Fig. 29 — Double exposure with handwritten data. to microphonics or movement of the camera parts because of motor operation, stray magnetic fields, or shutter operation. The oscillograph specifications frequently offer but few clues to the photographic capabilities of an assembly of equipment. The most suitable specifications is the maximum writing rate obtainable with particular assemblies or oscillograph and cathode-ray equipment. These specifications must be carefully interpreted to obtain meaningful recordings.8 INTERPRETATION OF RECORDINGS Now that we have solved all our photographic problems and have suitable bright, clear, and understandable recordings, we are faced