Spectroscopic OCT: Towards an effective tool for distinguishing authentic and artificial Chinese freshwater pearls

Journal Article (Journal Article)

Distinguishing authentic and artificial Chinese freshwater pearls involves various tools and techniques, based primarily on visual inspection and spectroscopy. These methods are highly variable and thus not statistically reliable. This study investigates the capacity of spectroscopic optical coherence tomography (S-OCT) to classify authentic and artificial pearls in the NIR spectral range. The major advantage of S-OCT is that it allows spectroscopic measurements from within pearls, unlike traditional methods such as diffuse reflectance spectroscopy that primarily probe the surface. S-OCT spectral data was analyzed using principal component analysis (PCA) and partial least-squares discriminant analysis (PLSDA) to classify pearls. The implemented models successfully predicted pearl type and met performance metrics. The results show that S-OCT models could be used for more objective discrimination of authentic versus artificial pearls.

Full Text

Duke Authors

Cited Authors

  • Zhou, Y; Zhao, Y; Kim, S; Wax, A

Published Date

  • March 1, 2018

Published In

Volume / Issue

  • 8 / 3

Start / End Page

  • 622 - 628

Electronic International Standard Serial Number (EISSN)

  • 2159-3930

Digital Object Identifier (DOI)

  • 10.1364/OME.8.000622

Citation Source

  • Scopus