7.2.2 Flying Spot Scanners (various methods used to display film on television or videotape)
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This article is from the rec.arts.movies.tech FAQ, by Scott E. Norwood snorwood@nyx.nyx.net with numerous contributions by others.
7.2.2 Flying Spot Scanners (various methods used to display film on television or videotape)
The more modern equipment, usually a Rank (tm) or Bosch (tm) telecine
machine, is large and expensive (making it impractical for television
station use, but appropriate for labs and post houses), and involves
the use of a `flying spot scanner,' which does not depend upon the
intermittent movement of a projector, but rather is capable of
scanning the film as it moves past the scanner head. This process is
similar to that used by the newer CCD scanners (such as those from BTS
(tm) /Philips (tm) , which use CCD sensors to read the images from the
film.
Because of its high quality and sophisticated electronics, as well as
its ability to easily and gently shuttle film back and forth, it is
suitable for production work, and, when used with additional
electronic equipment, allows for a huge degree of latitude in color
and exposure `correction' (much more so than is afforded a lab's color
timer), and allows for much additional creative use, as is often seen
in television commercials and music videos. Further, it is capable of
producing a transfer of camera negative to which sound may later by
synced (from an original sync 1/4" or timecoded DAT tape). Sound
synching may also be done during the film transfer.
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