Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine (1914)

Record Details:

Title:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Date:
1914
Author:
Gage, Simon Henry, 1851-1944
Publisher:
Ithaca, N.Y. : Comstock Publishing Company
Volume:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Leaf #:
000188
Language:
English
Subjects:
Lantern projection, Motion picture projection
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Bibliography: p. 693-703
Date Added:
July 19, 2022
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CH. VII] PROJECTION OF IMAGES OF OPAQUE OBJECTS 173 of given focus, the greater will be the brightness. With the same objective, the greater the distance of the objective from the screen, the less will be the brightness FIG. 92. CHADBURN'S OPAQUE LANTERN WITH ONE SOURCE. OF LIGHT. (From Chad-wick, Hepworth and Wright}. L Source of light shining directly upon the opaque object. M Beam of light from the opaque object to the objective and to the screen. FIG. 93. CHADBURN'S OPAQUE LANTERN WITH Two SOURCES OF LIGHT. (From Chadwick, Hepworth and Wright). This form requires two sources of light and two condensers. The light is projected directly upon the object and from the object it extends out through the objective to the screen. This method is still often employed. The same lantern, connected in the usual way, was employed for transparency projection (fig. i). L-L Source of light and condenser arranged to send the light directly to the opaque object. D-D Hinged door for the support of the book, picture or other object. When the door is closed, the light from both sources shines directly upon the opaque object. B Beam of light from the object to the objective. A Objective of large aperture for projecting the image of the opaque object upon the screen.