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 #:
000498
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 DRUM-TYPE CAMERA 495 to right and from bottom to top. It can be seen also that the pictures produced by the individual small lenses are of uniform quality. From these pictures it is possible to infer approximately the least fraction of a frame height that can be resolved: under the best conditions this is 1/2so of a frame height. The film used is Kodak Super XX Aero. The total field of view of the camera is 11 degrees and the aperture of the system is //30. Fig. 5 contains pictures of a 0.22-caliber bullet striking a piece of plate glass taken at a rate of 100,000 frames per second. Time increases from left to right. In the first frame the bullet is about to touch the glass, in the third it is halfway into the glass, and in the fourth, fractures may be seen spreading from the area of impact. Fig. 5 — A bullet striking a piece of plate glass. The plate glass is shown edgeon. A ruler in the background divided in inches gives the scale. The picture rate is 100,000 per second. CONCLUSIONS The speed range in which the camera operates enables it to be used in investigations of ballistic and shock-wave phenomena. It takes distortion-free pictures with excellent definition of either self-luminous or nonluminous events. The use of a 16-mm frame size enables the frames to be printed and to be projected with convenience. The camera can be moved around the laboratory floor to any required position. Further, the ability to record over 1200 frames in a sequence in combination with the above features makes the camera a versatile laboratory instrument and might uniquely suit it to certain types of investigations of shockwave and ballistic phenomena. REFERENCE (1) K. M. Baird, "High speed camera," Can. Jour. Res, vol. A24, pp. 41-45; July, 1946.