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Interlaced scanning Common elements of television camera tubes. occurs in
motion-picture practice, in which satisfactory performance with respect to flicker
requires twice as much film as is necessary for smooth simulation of motion.
This motion spreads out the more rapid left-to-right scans, forming the first field
scan of alternate lines and empty spaces. When the bottom of the frame is
reached, the spot moves vertically upward as rapidly as possible, while
extinguished and ...
In the continuous projector, a scanning spot from a flying spot camera tube is
passed through a rotating optical system, known as an immobilizer, which
focusses the scanning spot on the motion- picture film. As the film moves
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