active mirror

active mirror

[′ak·tiv ′mir·ər]
(optics)
A mirror whose position and shape are continually adjusted in response to changing environmental conditions in order to obtain optimum performance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
A 4.2-meter tertiary mirror will relay the light beam to an AO system that will include a 2.5-meter active mirror (whose more than 5,000 actuators will tweak its shape 1,000 times a second), and another 2.7-meter mirror for final image corrections.
ESO's 3.5-m New Technology Telescope pushes wavefront sensing and real-time active mirror support to a new plateau, and it has ingenious dome shutters to improve local seeing.
They use technologies such as active mirror supports, adaptive optics, even interferometry.