Ju Myeong Jin, Lee Sang Jin, Kim Yuri, Shin Jun Geun, Kim Hae Yeon, Lim Yiheng, Yasuno Yoshiaki, Lee Byeong Ha
School of Information and Mechatronics, GIST, Buk-gu, Gwangju, Korea.
Opt Express. 2011 Mar 28;19(7):6420-32. doi: 10.1364/OE.19.006420.
We present an integrated optical system that consists of optical coherence tomography (OCT) and laser-induced fluorescence (LIF) spectroscopy for multimodal analysis of pearls and pearl treatments. The OCT source and the LIF excitation beams were aligned together to illuminate the same spot of a pearl fixed on the sample stage that was under rotation. As a result, both OCT images and LIF spectra of the pearls were detected at the same time and also at the same place. For OCT, a 1310 nm-centered swept laser source was used. For LIF, a 405 nm laser diode was used and a lensed multimode fiber was utilized as a fluorescence probe. The tomographic investigation on the internal structure of a pearl allowed us to evaluate and categorize the pearl nondestructively as was previously reported. In addition, the measurements of fluorescence spectrum and its decaying rate helped to determine the species of mother oyster. The proposed multimodal analysis made it possible to classify the pearls and also to disclose the treatments made on the pearls.
我们展示了一种集成光学系统，该系统由光学相干断层扫描（OCT）和激光诱导荧光（LIF）光谱组成，用于对珍珠及珍珠处理进行多模态分析。OCT光源和LIF激发光束对准在一起，以照亮固定在旋转样品台上的珍珠的同一点。结果，珍珠的OCT图像和LIF光谱在同一时间和同一地点被检测到。对于OCT，使用了中心波长为1310nm的扫频激光源。对于LIF，使用了405nm激光二极管，并使用了带透镜的多模光纤作为荧光探针。正如之前报道的那样，对珍珠内部结构的断层扫描研究使我们能够无损地评估和分类珍珠。此外，荧光光谱及其衰减率的测量有助于确定母贝的种类。所提出的多模态分析使得对珍珠进行分类以及揭示对珍珠所做的处理成为可能。
