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Full-field laser heterodyne imaging vibrometry using a CMOS–DVR system

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Abstract

A laser heterodyne imaging vibrometry is proposed for full-field vibration measurement. The vibration responses are imaged and recorded using a CMOS camera and a digital video recorder. A digital demodulation method based on a cumulative distribution function and autocorrelation is designed to demodulate signals affected by speckle noise. The experimental investigations confirm the viability of the proposed method for vibration measurement. Meanwhile, a comparison with laser Doppler vibrometry is performed to further validate the method. The results prove the proposed vibrometry is an effective and precise option for full-field vibration measurement.

© 2021 Optical Society of America

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Supplementary Material (2)

NameDescription
Visualization 1       A dynamic video of vibrating object.
Visualization 2       Evolution of the pendulous reed moving.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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