collimating sight
collimating sight
[′käl·ə‚mād·iŋ ‚sīt] (ordnance)
Sight equipped with a collimator, set parallel with the axis of the bore of the gun in horizontal direction, but adjustable in elevation, so that it can be kept focused on an aiming point while the gun is raised or lowered.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.