The history of three-color photography (1925)

Page scan 000188 from The history of three-color photography

Record Details:

Title:
The history of three-color photography
Date:
1925
Publisher:
Boston : American Photographic Publishing Company
Volume:
The history of three-color photography
Leaf #:
000188
Language:
English
Subjects:
Motion Pictures, Motion pictures--Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Date Added:
May 08, 2025
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72 History of Three-Color Photography prisms or mirrors. The various forms of prisms are shown in Fig. 67. The main feature was the use of the anterior lens and the disposition of the prisms thereto, so as to split the image into three beams. In a subsequent patent11 the shapes of the prisms were altered to correct the aberrations of those first suggested ; the chief difference being that all the faces were curved. Fig. 65. Bennett's E.P. 10,150, 1912. S N vgg S> •3 % gr^ s >$ u, \. W tt % C. Urban and the Natural Color Kinematograph Co.12 patented the use of two mirrors b, b1, Fig. 68, the former being transparent and the latter silvered. A plane parallel plate x being placed in the path of the reflected beam to equalize the focus ; e, e1 were the filters and d the sensitive surface. D. W. Player13 proposed to use a rotating mirror or reflectors 4, 5 in 1, 2, 3, Fig. 69. In 1 the films were placed in echelon, as