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 #:
000532
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 529 In general, the modification function g'(y) is similar to that shown in Fig. 4. g'(y) = 0 oo < y < yi g'(y) = 1 yi < y< + °°. (9) The modified diffraction pattern is then given by g(y} = gW X G(y}. (10) From (8) h(z] = const yi^ g(y}e~ik*(z-)dy. (11) Combining (7), (8), and (10) Ate) = const yi^ /(a) cte yi". 0'(y)ett*(*-*>dy. (12) From Figs. 1 and 2 a = y/f ao = «>//o then (2) becomes However, since in most systems / = /0, 3>(z) = j(w y). (13) If (13) and (9) are substituted for $(x) and g'(y) in (12) where (15) on integrating (14) (16) Equation (15) indicates that the effect of varying the light source and knife-edge position are complementary and that either or both operations produce the same result as adding an optical wedge of angle (w + yi) //to the disturbance /(#). To find the effect of a light source of finite size, rather than a point source one must integrate a function h(z, w) over the dimensions —wto +w of the light source. This is best done by solving h(z) for several