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 #:
000320
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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rfjn a Diffusing Disk b Correction Filter c Diaphragm Leaves d Red and Blue Filters Photronic Cell Trigger Assembly Handle Tripod Socket D-C Microammeter Fig. 2. Schematic side view of Color Temperature Meter. .gm openings are large, but none when they are small. The cell used in the instrument is a ! Type 3RR Weston Photronic Cell especially selected for low fatigue at both ends of the visual spectrum. The ' meter is Model 731 Weston 0 to 30 microammeter. Diaphragm The special diaphragm (Fig. 3) • utilizes six leaves (a), three on each side ' of a thin center plate (b) which by rota•i tion causes the leaves to move over the j aperture or away from it. The leaves and actuating disk are between two outer plates. These plates support the pins on which the pivot ends of the diaphragm leaves can rotate. The diaphragm leaves have long, narrow tongues which at full open position extend across the circular diaphragm opening dividing it into six pie-shaped openings. Since the support pins for the leaves are spaced at 60° intervals alternately in one support plate then the other, the tongue of one leaf at full open aperture overlays the tongue of a leaf on the opposite side of the actuator. Dawson, Grant and Ott: Color Temperature Meter 311