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Photoacoustic Imaging with a Line-Focus Laser Beam for Rapid Inspection and Tomographic Characterization of Simulated Surface and Undersurface Defects

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DOI: 10.4236/oja.2013.32A002    3,616 Downloads   6,073 Views   Citations

ABSTRACT

A photoacoustic (PA) imaging apparatus using a laser line-focus beam (LFB) was designed to perform rapid inspection and photoacoustic tomographic (PAT) imaging of surface and undersurface defects. 2D-PAT imaging of surface and undersurface defects was demonstrated based on a formulation similar to the X-ray tomography. The obtained PAT images represented forward-projected PA signals collected along the LFB. The reconstructed images were in close agreement with those obtained from laser point-focus beam (PFB) PA imaging. We achieved rapid non-destructive inspection of a surface-simulated defect using a LFB. The reconstructed PA image of the undersurface defect was consistent with that obtained by a plane-thermal wave diffraction model.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

T. Hoshimiya and M. Hatake-Yama, "Photoacoustic Imaging with a Line-Focus Laser Beam for Rapid Inspection and Tomographic Characterization of Simulated Surface and Undersurface Defects," Open Journal of Acoustics, Vol. 3 No. 2A, 2013, pp. 8-15. doi: 10.4236/oja.2013.32A002.

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