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 #:
000510
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 BRITISH HIGH-SPEED CINEMATOGRAPHY 507 which, in turn, produces an enhanced Kerr effect. The cell is controlled by a circuit which can be operated to give any exposure time between 0.1 and 6 microseconds at intervals from 4 X 10 ~7 to 70 microseconds. The number of exposures in a sequence can also be controlled. For a Kerr cell with plates 1 centimeter long, the electric field required for maximum effect is about 33 kilovolts per centimeter. LOADING BOX / AUUM*ttS£& MIRRORS UEAOER STR?P 9* I FILM OUfOES MOTOR 8€ARNG LEVER LENSES SPEED CONTROL RHEOSTAT Crown Copyright Reserved Fig. 4 — Rear view of Marley high-speed camera with back plate removed. In the case of the equipment built by Froome, plates spaced by 3 mm were used, as he employed the equipment behind a microscope eyepiece from which the angle of the cone of light was small. To produce a larger aperture, a multiple-plate cell connected like a condenser would be needed, but this would have the effect of increasing the shortest exposure time possible. For exposures of not less than 1 microsecond, such a cell could be used behind a lens of 1-centimeter diameter, or slightly more.