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Proceedings Paper

Common-path optical frequency domain imaging system designed for identifying and grading pearls
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Paper Abstract

We present a common-path optical frequency domain imaging (CP-OFDI) system for non-invasive evaluation of various pearls. By adopting a high speed ready-to-ship scanning light source and a common-path lensed fiber probe, with the help of a rotation stage, real-time display of whole circumference of a pearl could be achieved. The common-path lensed fiber probe was fabricated by simply forming a focusing lens directly on the tip of an optical fiber, thus the fiber lens acted as a reference reflector as well as a focusing lens. The focal length of the lensed fiber probe was over 600 μm in free space and the average imaging depth reached up to 3 mm, which was deep enough to examine the internal structure of the pearl. The sensitivity of the system was experimentally obtained as 100dB. With an implemented system, the presence of nucleus and the nacreous laminated pattern were confirmed and analyzed. Experimental results show that the CP-OFDI system has great potential for identifying and grading pearls non-invasively but precisely.

Paper Details

Date Published: 24 February 2010
PDF: 6 pages
Proc. SPIE 7556, Design and Quality for Biomedical Technologies III, 755613 (24 February 2010); doi: 10.1117/12.841220
Show Author Affiliations
Myeong Jin Ju, Gwangju Institute of Science and Technology (Korea, Republic of)
Seon Young Ryu, Gwangju Institute of Science and Technology (Korea, Republic of)
Jihoon Na, Gwangju Institute of Science and Technology (Korea, Republic of)
Hae Young Choi, Gwangju Institute of Science and Technology (Korea, Republic of)
Hae Yeon Kim, Korea Pearl Lab. (Korea, Republic of)
Byeong Ha Lee, Gwangju Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 7556:
Design and Quality for Biomedical Technologies III
Ramesh Raghavachari; Rongguang Liang, Editor(s)

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