Sparrow's criterion

Sparrow's criterion

[′spar·ōz krī‚tir·ē·ən]
(optics)
A criterion for the resolution of two light sources, according to which the light sources are resolved if there is some central dip in their combined diffraction pattern.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.