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 #:
000334
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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March, 1930] OPTICS OF MOTION PICTURE PROJECTORS 317 phenomena of spherical and chromatic aberration, it is apparent that the position and size of the image of the arc formed by the condenser will depend somewhat upon the zone of the condenser used and the color of the light. Consequently, our two fundamental conditions must be extended to include every zone of the lens and every color in the light. The magnitude of the losses within the system due to absorption and reflection have already been considered. It should be stated again that the results obtained on the basis of these assumptions apply only to an ideal system and that no actual system can quite equal its performance. This difference between the two cases may be used as a measure of the efficiency of any actual system. Since the underlying principles in the case of an ideal system are more or less obvious, much of the uncoordinated experimentation, which often accompanies the design of projection systems, can thereby be avoided.