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Proceedings Paper

Noninvasive subsurface analyzing technique using multiple miniaturized Raman probes
Author(s): Yuko S. Yamamoto; Yuichi Komachi; Hideyuki Shinzawa; Atsushi Maruyama; Bibin B. Andriana; Yuji Matsuura; Yukihiro Ozaki; Hidetoshi Sato
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Paper Abstract

The optical property of the ball lens mounted hollow optical fiber Raman probe (BHRP) is studied in the present study. Since the ball lens has rather large aberration, the focus of the BHRP is dispersed and the spatial resolution in depth direction goes low. The spatial dispersion of the focal point was evaluated using model samples. The BHRP equipped a sapphire ball lens of 500 μm diameter was employed. Layered samples consisting of a polymethyl methacrylate (PMMA) substrate and various thicknesses of polyethylene (PE) films were measured with the BHRP. The relative band intensities of the upper and the lower layers appear at different rates in the obtained spectra, reflecting the optical properties of the probe. According to the spectra, the optical dispersion of the focal point is estimated. The result suggests that the spatial dispersion of the focus point fitted to Gaussian distribution. The working distance (WD) is 53 μm and the FWHM of the fitted Gauss distribution is 64 μm.

Paper Details

Date Published: 20 February 2009
PDF: 6 pages
Proc. SPIE 7173, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications IX, 71730T (20 February 2009); doi: 10.1117/12.809346
Show Author Affiliations
Yuko S. Yamamoto, Kwansei-Gakuin Univ. (Japan)
RIKEN (Japan)
Yuichi Komachi, Machida Endoscope Co., Ltd. (Japan)
Hideyuki Shinzawa, RIKEN (Japan)
Atsushi Maruyama, RIKEN (Japan)
Bibin B. Andriana, RIKEN (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)
Yukihiro Ozaki, Kwansei-Gakuin Univ. (Japan)
Hidetoshi Sato, RIKEN (Japan)

Published in SPIE Proceedings Vol. 7173:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications IX
Israel Gannot, Editor(s)

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