plane-parallel resonator

plane-parallel resonator

[′plān ′par·ə‚lel ′rez·ən‚ād·ər]
(optics)
A beam resonator that consists of a pair of plane mirrors which are perpendicular to the axis of the beam.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.