flying-spot

flying-spot

adj
(Broadcasting) denoting an electronic system in which a rapidly moving spot of light is used to encode or decode data, for example to obtain a television signal by scanning a photographic film or slide
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014