Journal of the Society of Motion Picture Engineers (1930-1949)

Page scan 000525 from Journal of the Society of Motion Picture Engineers

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 #:
000525
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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522 GREEN AND OBST November reticles in a constant geometrical relationship in respect to the trajectory line of each frame. The reticles are then used in assessing the film as located points from which all rocket measurements are made. In the CZR-1 there will also be included another device known as the "star projector." This consists of light from a point source being directed by a lens system to three small mirrors and reflected through the camera lens and shutter to the film. The three mirrors are plane -•^m^" Fig. 5 — Section of Bo wen film in which the 1000-cycle timing marks are clearly visible on the right-hand edge. The heavy marks represent a 200-cycle beat used in assessment of film to facilitate counting. surfaces ground at the proper angles at the end of small rectangular quartz bars which are later cemented together. The light from the point source is thus divided into three beams which are at a constant angular relationship. On the film there will then appear three small points of light in a line, the two end points being separated by several inches. Thus, each frame has impressed upon it a constant angular measure. This is of value in considering the change in focal length of a lens system due to the large changes in temperature to which cameras used at desert stations are subjected.