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10 February 2011 Integrating optical system designed for multimodal analysis of pearls and its mother oyster to distinguish and appraise cultured pearls
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Proceedings Volume 7892, Multimodal Biomedical Imaging VI; 78920T (2011) https://doi.org/10.1117/12.873545
Event: SPIE BiOS, 2011, San Francisco, California, United States
Abstract
An optical integrating system composed of optical coherence tomography (OCT) and fluorescence spectroscopy (FS) has been designed and utilized to distinguish pearls by determining their mother oysters used in pearl culturing as well as discriminate and evaluate the pearls, nondestructively. By adopting a wavelength division multiplexing (WDM) and a double clad fiber (DCF) coupler, a FS system could be successfully combined with a fiber-based swept source OCT (SSOCT) system. Applying a common-path configuration, furthermore, the integrating system could be implemented in a simple and effective way with highly minimized group velocity dispersion (GVD) and polarization mismatch problems. The internal structure measurement and the fluorescence spectrum measurement, which were previously performed by two independent apparatus, were concurrently made with the proposed system. From the OCT measurement, we could measure the thickness of the nacre layer, observe the fine sub-structure of the nacre, and inspect the nucleus through the nacre of a pearl. With the fluorescence spectrum measurement, we could categorize the pearls by determining their mother oysters.
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Myeong Jin Ju, Sang Jin Lee, Yuri Kim, Jun Geun Shin, Do Hyung Kim, Hae Yeon Kim, Dong Seon Lee, and Byeong Ha Lee "Integrating optical system designed for multimodal analysis of pearls and its mother oyster to distinguish and appraise cultured pearls", Proc. SPIE 7892, Multimodal Biomedical Imaging VI, 78920T (10 February 2011); https://doi.org/10.1117/12.873545
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