vibrographs

vibrographs

vibrographs
Mechano-optical vibrometer. The motion given to the probe by the vibrating surface is used to rock a mirror and thereby actuate an optical lever arm. A light beam reflected from the mirror and focused onto the scale measures vibration amplitude.
Devices used to measure vibrations of an airplane. These are used mainly for measuring airframe vibrations.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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