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 #:
000537
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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534 SHAFER November diffraction pattern caused by the disturbance and the effect of the knife-edge in modifying this pattern. The Fraunhofer diffraction pattern can be calculated from (7) and (18). A sin kyA/f kyA/f A cos kyA if — •< cos <£ (asm ((kya/f) 1 ((%»//) (21) 2 .6 H — H r /6 i l-^rb — l^rt 0 0* OS IZ t — h (6 ~ mm. Fig. 8 — Fraunhofer diffraction pattern due to disturbance of Fig. 5. A = 10, a = 1, <f> = 0.125 X, / = 250 cm. Letters on the curves refer to the several terms of equation (21). The contribution of the disturbance region a-a, given by the terms (b) and (c) of (21), relative to the contribution of the aperture a-a is seen to be in the ratio of a/ A . The terms (a) and (b) indicate how the diffraction pattern of the free aperture will be modified by the geometrical extent of the region a-a. The term (c), while also tending to modify the free-aperture diffraction pattern, is primarily the diffraction pattern of a free aperture a-a shifted in the Y plane by an amount y/f = $/a. This term contributes largely to the structure of the image of a-a in the Z plane. One criterion for the maximum width of light source is that the geometrical image of the light source in plane