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 #:
000318
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. IX] TROUBLES WITH MICRO-PROJECTION 303 FIG. 1 68. THOMPSON'S PROJECTION MICROSCOPE. (Cut loaned by the A. T. Thompson Co.). The projection microscope with the substage condenser system is attached to the reflectoscope (fig. 97) in the position where vertical opaque objects are placed ; this allows the direct beam of light to be utilized in micro-projection. The stage and the objective holder are independent, and no ocular is used. This permits the projection of large objects with low powers or smaller objects with high powers. From the short tube employed, the field is not restricted. its position often work wonders. The substage condenser may be too near to the large condenser or too far from it so that the light cone does not reach it in its most favorable position. 4. The room may not be dark enough or external light may fall directly on the screen from some window or open door. 5. Never forget the carbons. A slight mal-position or decen terins: of the crater mav cause all the trouble.