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26 March 2020 Vibration distribution measurement using downsampling phase-shifting interferometer
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Abstract

Vibration distribution measurements using interferometers have been evaluated by many researchers. We have used a laser diode interferometer to measure two-dimensional vibration distributions using a combination of phase-shifting and downsampling techniques. Our system simultaneously measured nanometer-order sinusoidal vibration distributions of two objects vibrating at different frequencies, using a charged coupled device camera with a slower frame rate than either of the two harmonic frequencies being measured. This is a cost-efficient and compact system capable of successfully measuring high-frequency vibrations without requiring expensive high-frame-rate cameras.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2020/$28.00 © 2020 SPIE
Yuta Ohara, Takamasa Suzuki, Samuel Choi, and Osami Sasaki "Vibration distribution measurement using downsampling phase-shifting interferometer," Optical Engineering 59(3), 034112 (26 March 2020). https://doi.org/10.1117/1.OE.59.3.034112
Received: 23 January 2020; Accepted: 16 March 2020; Published: 26 March 2020
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