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 #:
000641
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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624 ARTHUR J. HOLM AN [J. S. M. P. E. present to the motion picture industry a new system of projection having many possibilities in the presentation of sound, action, and natural color. IMPROVED LENS GRINDING AND POLISHING MACHINE The optical industry has never been called on for large quantities of matched lenses of relatively large diameter which must be exactly alike as to focal length, thickness, resolving power, and other optical characteristics, and, as the commercial production of such lenses is FIG. 1. Continuous projector mechanism showing lens wheels in position. out of the question with present methods of manufacture, it became necessary to develop an improved grinding and polishing machine. This machine, illustrated in Fig. 2, operates on entirely new principles and is covered by basic patents. Lenses are ground today on laps which have been surfaced to the exact curvature desired on the lens, and an expert lens maker can produce a fine ground surface on glass very closely approaching the ac