Journal of the Society of Motion Picture and Television Engineers (1950-1954)

Record Details:

Title:
Journal of the Society of Motion Picture and Television Engineers
Date:
1950-1954
Publisher:
Easton, Pa. : The Society
Volume:
Journal of the Society of Motion Picture and Television Engineers
Leaf #:
000436
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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Fig. 14. Askania 16mm television projector of the nonintermittent type with optical compensation by means of a rotating prism. Zerlegtrrdhrt Fig. 15. Schematic of the Askania continuous-motion television projector. Motorola, Inc., has devised a continuous all-electronic scanner for 16mm color motion-picture film which operates on a different principle.102 No rotating prisms or mirrors are used. A "jumpscan" technique is employed wherein the vertical deflection of the cathode-ray tube forming the flying-spot light source is shifted by an amount equal and opposite to the film travel, thereby electrically immobilizing any given spot on the film. Since a ratio of 2 to 5 is required to convert 24 film frames to 60 television fields per second, one film frame will receive 3 jump-scans, while the next film frame will receive 2 jumpscans, thus making a total of 5 jumpscans for 2 film frames. The flying-spot Daily: Progress Committee Report 357