light chopper
light chopper
[′līt ′chäp·ər] (electronics)
A rotating fan or other mechanical device used to interrupt a light beam that is aimed at a phototube, to permit alternating-current amplification of the phototube output and to make its output independent of strong, steady ambient illumination.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
The giant helicopters will guide five lighter choppers that will be used to lift passengers and crew, whose condition is yet to be known.The
light choppers were expected to take off from the command centre any minute from 8am.
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