Open AccessA METHOD FOR MEASURING THE MICRO-VIBRATION AMPLITUDE BY USING INTENSITY-COMPARISON LOCK-IN TECHNIQUE OF LASER
Author(s) -
Yonggui Li,
Zhuang Jiejia,
Yuling Ji
Publication year - 1989
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.38.1162
Subject(s) - fabry–pérot interferometer , amplitude , vibration , laser , intensity (physics) , optics , lock (firearm) , light intensity , materials science , physics , acoustics , engineering , mechanical engineering
A method of measuring micro-vibration amplitude with laser is presented. By using the optical resonant characteristic of Fabry-Perot etalon and intensity-comparison lock-in technique of laser, we have completed a measurement with the minimum amplitude of vibration at the order of 10-12 cm under the condition of an ordinary laboratory.