Motion picture projection; an elementary text-book (1921)

Record Details:

Title:
Motion picture projection; an elementary text-book
Date:
1921
Publisher:
New York, Theatre Supply Co.
Volume:
Motion picture projection; an elementary text-book
Leaf #:
000121
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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120 MOTION PICTURE PROJECTION PRINCIPLES OF OPTICAL PROJECTION The process is almost the reverse of ordinary photography. For instance, in photography a scene by means of the photographic objective or lens is photographed and a reduced image is obtained on ground glass. This glass is replaced by a sensitized plate and by the use of chemicals the image is fixed thereon. In projection the process is reversed, that is, a transparent slide is made from the picture, or the roll of film taken with the motion picture camera is developed and used in the motion picture machine (the projector). By means of a condensed light they are strongly illuminated and with an objective lens an enlarged image is projected upon the screen, this screen image corresponding to the real objects photographed. The principles of optical projection for motion picture machine will readily be understood from the diagram below. Showing the Optical System of a Moving Picture Circuit and How Kays of Light Travel from Arc E to Screen S