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

Shuncong Zhong, Hao Shen, Yaochun Shen

Research output: Contribution to journalArticle

21 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)127-131
Number of pages5
JournalOptics and Lasers in Engineering
Volume49
Issue number1
Early online date1 Sep 2010
DOIs
Publication statusPublished - Jan 2011

Keywords

  • structural vibration
  • optical coherence tomography
  • non-destructive testing

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