Living pictures; their history, photoproduction and practical working. With a digest of British patents and annotated bibliography (1899)

Record Details:

Title:
Living pictures; their history, photoproduction and practical working. With a digest of British patents and annotated bibliography
Date:
1899
Publisher:
London Optician & Photographic Trades Review
Volume:
Living pictures; their history, photoproduction and practical working. With a digest of British patents and annotated bibliography
Leaf #:
00036
Language:
English
Collection:
Books
Format:
Books
Contributor:
Robarts - University of Toronto
Sponsor:
University of Toronto
Coordinator:
Media History Digital Library
Description:
52
Date Added:
July 19, 2022
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18 LIVING PICTURES. the whole circle of lenses being capable of adjustment in order that all the optic axes should cross at the place where the image was formed on the screen. The separate lenses thus all threw their respective diagrams in the same place, the succession of the series being attained by revolving a limelight behind the diagrams, only one of which was thus lit at a time. The interest of this apparatus is great, not only from the fact that the source of light was the only moving part, but also because this appears to be the first suggestion of pro- jecting successive pictures through more than one optical system, a method which at the time of writing is probably the novelty of the day. Instead of moving the illuminant, it would have been simple to have deflected the light by means of a rotating mirror, but this multiple form does not appear to have been followed up, and though in an}^ type of slotted machine with con- tinuously moving diagrams the loss of light must have been enormous, yet it was towards the improve- ment of this type that attention was directed. To secure increase of illumina- tion it was necessary to show the object for as long as possible, making the change to the next diagram in a very short time. This desire mainly arose because the need for a projecting instrument was strongly felt, and it is certain that no toy attains a great popularity whose use is confined to one individual at a time. Figs. 13 & 14.