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

Page scan 000507 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 #:
000507
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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504 JONES AND EYLES November the drum carrying the film. One big advantage of the drum camera using a short length of film is that it avoids film wastage in photographing an operation which takes only a very small time to complete. Frequencies up to 2500 pictures per second have been attained, the drum and the glass block being geared together to provide correct compensation. A S1/? by 2V2-inch Zeiss camera with a 10.5centimeter //3. 5 lens was used, in conjunction with a drum about 8 inches in diameter. A special parallel-sided prism of crown glass was British Cotton Industry Research Association Fig. 1 — Single-frame enlargement showing a shuttle emerging from the "shed" of a loom. Photographed with P. S. H. Henry's camera at 1500 frames per second. made and mounted so that four pictures could be taken for each revolution of the prism. The image is cast on to a narrow slit running across the film on the drum at right angles to the direction of its motion. By this means, optical correction is improved, because it is limited to a small angle of rotation of the prism. With a slit one sixteenth of an inch wide, an exposure time as short as 45 microseconds can be obtained at a frequency of 2500 pictures per second. The film drum is made of solid mild steel, the web being lightened by