flying-aperture scanner

flying-aperture scanner

[¦flī·iŋ ¦ap·ər·chər ‚skan·ər]
(electronics)
An optical scanner, used in character recognition, in which a document is flooded with light, and light is collected sequentially spot by spot from the illuminated image.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.