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 #:
000478
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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TWENTY-LENS HIGH-SPEED CAMERA 475 lergent principal plane of the lens and the film are always parlei. Instead, as seen in Fig. 6A, the lens and film approach one tother because both are moving on an arc with the same radius, larger radius will minimize this condition until with an infinite lius the displacement becomes zero. In Fig. 6B, the prism is FLINT GLASS R, H-36.0MM R2 = -I9.0MM R3=-I38.0MM D, = 3.5MM D= I.5MM BACK FOCUS.53.233MM FRONT FOCUS,55.43IMM EFFECTIVE FOCUS, 55.921 MM ND ,THE INDEX OF REFRACTION 1 OF CROWN GLASS FOR THE 42 LJ SODIUM LINE, IS 1.5744 ND ,THE INDEX OF REFRACTION 1 OF FLINT GLASS FOR THE SODIUM LINE, IS 1.6208 V, , DISPERSION OF CROWN GLASS, IS 57.7 V2 > DISPERSION OF FLINT GLASS, IS 36.1 -0.04 -0.02 0 SPHERICAL ABERRATION IN MILLIMETERS -6 -4 -2 0 CURVATURE OF FIELD IN MM 0 0.5 1.0 DISTORTION IN PERCENT Fig. 7 — Lens characteristics. loved for simplicity and the film is placed behind the objective stead of alongside it. In the 20-lens camera the radius and limiting tperture are such that this displacement never exceeds three tenths of a millimeter. The depth of focus of the objectives is sufficient to tolerate this much displacement and still resolve 60 lines per millimeter. These distortions just mentioned have not been completely eliminated in this camera. They have, however, been kept to a low enough