Transactions of the Society of Motion Picture Engineers (1916)

Record Details:

Title:
Transactions of the Society of Motion Picture Engineers
Date:
1916
Publisher:
Washington D.C. : Society of Motion Picture Engineers
Volume:
Society of Motion Picture Engineers : incorporation and by-laws (1916)
Leaf #:
000247
Language:
English
Subjects:
motion pictures, Cinematography -- Periodicals
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Preceeded by an unnumbered issue published in 1916 called: Incorporation and by-laws
Date Added:
December 28, 2023
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position of the stencil necessitated by the uneven illumination of the cone and the resulting diaphragm action (II) of the aperture plate. Bearing in mind, that the concave mirror renders the same service in all cases and that the condenser which is composed of the smaller number of elements is preferable and that the stencil is located in the smallest section of the cone where it is evenly illuminated we sum up the different possibilities in the sequence of their efficiency. (i) Small ordinary condenser, source not too large and near the condenser, stencil near the condenser, large projection lens. Practical difficulties: the light source. Faults: none. (2) Just as good: large spherically corrected condenser, pointshaped source at usual distance from condenser, stencil not near the condenser, small projection lens. Practical difficulties: the light source. Faults: none. (3) Spherically corrected condenser, extended light source at usual distance from condenser, stencil not near the condenser, large projection lens. Practical difficulties: none. Faults: loss by diaphragm action (II) of the aperture plate. (4) Large ordinary condenser, extended light source at usual distance from condenser, stencil not near condenser, large projection lens. Practical difficulties: none. Faults: loss by spherical aberration and diaphragm action (II) of the aperture plate. The nearer point-shaped the light source, the lower grade a projection lens may be used.