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 #:
000571
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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568 BERKLEY AND MANSBERG November As is usually the case, however, the same oscillograph is to be used both for development work or visual observation, and for photographic recording. In this case, it is desirable to use a screen which is capable of efficient operation for both purposes. Two such screens are the Radio Manufacturers Association's standard Type P2 and P7 screens. If the oscillograph is to be used to observe high-speed transients, but is intended for only low-speed continuous recordings, the P2 screen will generally prove quite satisfactory.56 (a) Unexpanded. (b) Expanded. Fig. 21 — Use of sweep and film motion in combination to expand portion of trace. When continuous-motion recordings are made, a blue filter can be used to isolate the blue light which has a relatively short persistence while if visual observation of the transients is required, the filter is removed. In some cases the residual persistence of the P2 screen will prove too long and, therefore, will require a rather dark filter to remove any traces of the persistence completely. This will reduce the light efficiency so that a better solution would be the use of the P7 screen in which the phosphorescence and fluorescence occur in