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

Page scan 000465 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 #:
000465
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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Improvements in High-Speed Motion Pictures by MultipleAperture FocalPlane Scanners BY FORDYCE E. TUTTLE EASTMAN KODAK COMPANY, ROCHESTER, NEW YORK Summary— It is shown how, with the multiple-aperture scanning method of high-speed photography, the absolute number of entirely new position pictures of a moving object is more a function of how many grains of emulsion are uncovered in the total aperture travel than a function of the number of aperture widths uncovered. This results in many more frames per event than had been assumed heretofore. A second camera of this type is described hi which two-dimensional scanning gives composite pictures with a dot structure. This is accomplished by means of a rotating disk. This camera is capable of taking high-speed pictures at the rate of at least 1,000,000 per second. AT THE APRIL, 1949, meeting of the Society of Motion Picture Engineers in New York a new method of obtaining high-speed pictures was described! whereby instantaneous time covers multiple small portions of a single large frame, the total area of these small portions being sufficient to provide detail and the single frame being large enough to permit unmagnified observation. This is accomplished by multiple-aperture focal-plane scanners. It is now proposed to discuss further certain details of this new approach for the investigation of high-speed phenomena and to describe a camera of considerably more flexibility than that shown in April. ABSOLUTE NUMBER OF TIME POSITIONS Our first attempt to investigate the high-speed aspects of multiple apertures moving in a focal plane was described as a spring-driven camera with a one-dimensional scanning grid. The dimensions of the grid were given as one-thousandth-inch transparent lines separated by opaque areas so that the lines are on 0.030-inch centers. Continuous translation of this grid served to uncover new emulsion as time * Presented October 12, 1949, at the SMPE Convention in Hollywood, t This issue, pp. 451-461. 462 NOVEMBER, 1949 JOURNAL OF THE SMPE VOLUME 53