Birefringence analysis of cultured and imitation pearls using polarization-sensitive swept-source OCT

Jae Hwi Lee; Eun Jung Min; Jun Geun Shin; Kwan Seob Park; Hea-Yeon Kim; Byeong Ha Lee

doi:10.1117/12.2003768

22 February 2013 Birefringence analysis of cultured and imitation pearls using polarization-sensitive swept-source OCT

Jae Hwi Lee, Eun Jung Min, Jun Geun Shin, Kwan Seob Park, Hea-Yeon Kim, Byeong Ha Lee

Proceedings Volume 8593, Optical Methods in Developmental Biology; 85930O (2013) https://doi.org/10.1117/12.2003768
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

We present a birefringence analysis method based on polarization-sensitive swept-source optical coherence tomography (PS-SS-OCT) for distinguishing pearls. To cope with the round shape of general pearls, a rotation stage was used for the sample scanning. With the system, the birefringence of several cultured pearls including south sea, Akoya, freshwater cultured pearls, and imitation pearls are analyzed and compared. Interestingly, PS-SS-OCT surely shows well developed birefringence patterns of phase retardation and fast axis orientation with the cultured pearls, whereas the pattern does not appear in the imitation pearls. In addition, the intensity image can help to distinguish the cultured pearls. Therefore, PSSS-OCT enables a more accurate interpretation for identifying the cultured pearls from imitation pearls.

Citation Download Citation

Jae Hwi Lee, Eun Jung Min, Jun Geun Shin, Kwan Seob Park, Hea-Yeon Kim, and Byeong Ha Lee "Birefringence analysis of cultured and imitation pearls using polarization-sensitive swept-source OCT", Proc. SPIE 8593, Optical Methods in Developmental Biology, 85930O (22 February 2013); https://doi.org/10.1117/12.2003768

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