Real-time monitoring of structural vibration using spectral-domain optical coherence tomography

Zhong, Shuncong and Shen, Hao and Shen, Yaochun (2011) Real-time monitoring of structural vibration using spectral-domain optical coherence tomography. Optics and Lasers in Engineering, 49 (1). pp. 127-131. ISSN 0143-8166 (https://doi.org/10.1016/j.optlaseng.2010.08.008)

[thumbnail of Zhong-etal-OLE-2011-Real-time-monitoring-of-structural-vibration-using-spectral-domain]
Preview
Text. Filename: Zhong_etal_OLE_2011_Real_time_monitoring_of_structural_vibration_using_spectral_domain.pdf
Accepted Author Manuscript
License: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 logo

Download (575kB)| Preview

Abstract

We report in this paper the development of a spectral-domain optical coherence vibration tomography (OCVT) using a broadband CCD-based spectrometer and a short-coherence white light source. We demonstrate that both the vibration amplitude and frequency can be quantified, in the frequency range 0–250 Hz, with an axial resolution of 1 μm. Furthermore, the inner structure (layer thickness) of a vibrating sample can also be quantified simultaneously. The developed OCVT is non-contact and noninvasive in nature, thus is ideal for real time and in situ monitoring of low-frequency micro-vibrations that have critical impacts on many high-precision manufacturing and engineering processes.