Fresnel diffraction
(redirected from Near-field diffraction pattern)Fresnel diffraction
[frā′nel di′frak·shən] (optics)
Diffraction in which the source of light or the observing screen are at a finite distance from the aperture or obstacle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.