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 #:
000544
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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1949 SCHLIEREN PHOTOGRAPHY 541 will coincide with the tangential and sagital image of the source. The separation of these two images is given by , sin2 a AS =/ cos a (29) To keep the light source out of the collimated beam, it must be displaced from the optic axis by a distance equal to at least one half the Fig. 15 — Light-intensity distribution in the image of a disturbance of Fig. 5 with a source 1.25 X 10~2-mm width for several knife-edge positions. A = 10, a = 1, <£ = 0.125 X, /= 250 cm. aperture of the system. If a is small, cos a = 1, sin a = a = A/L Equation (29) then becomes A5=/(^). (30) Since for most wind-tunnel systems the aperture A will be fixed by other than optical considerations, the only variable involved in controlling the astigmatic distance S will be focal length /. To keep S as small as possible, the focal length of the mirrors should be large.