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 #:
000477
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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474 WYCKOFF November radius as the film. Under any other conditions the film will move either faster or slower than the image, producing improper tracking or distortion smearing. A second distortion is caused by the cylindrical section of the film plane. It is therefore difficult to have a critically sharp image over the entire film. A third distortion called "rotation of image" is EMERGENT PRINCIPAL PLANE OF LENS ROTATI LENS I —( ON POINT OF 9k FILM / ^ = FILM • TOTAL IMAGE U DISPLACEMENT FILM DISPLACEMENT DISPLACEMENT B Fig. 6 — Depth-of-focus limits. shown in Fig. 5A, the extreme case of such rotation. In this diagram the lens is rotated about an axis passing through the optical axis and the emergent principal plane of the lens. As the lens is rotated, so must the film be rotated if the image is to remain sharp. If the lens is rotated about a point infinitely distant from the emergent principal plane but still on the optical axis there will be no image rotation. This is shown in Fig. 5B. To satisfy the conditions of image rotation the lens and film should be rotated so that the