Dr. Tsung-Han Tsai Profile

Dr. Tsung-Han Tsai

Senior Research Scientist at Gemological Institute of America

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Publications (6)

Proceedings Article | 1 October 2024 Presentation + Paper

Tunable laser photoluminescence and excitation spectroscopy for gemstone analysis

Tsung-Han Tsai, Zhen Wang

Proceedings Volume 13130, 1313003 (2024) https://doi.org/10.1117/12.3026223

KEYWORDS: Sapphire, Diamond, Fluorescence, Spectroscopy, Ultraviolet radiation, Tunable lasers, Photoluminescence, Emission spectrum

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Proceedings Article | 2 October 2023 Poster + Paper

Excimer laser based photoluminescence device for diamond identification

Zhen Wang, Tsung-Han Tsai, Wuyi Wang

Proceedings Volume 12665, 126650M (2023) https://doi.org/10.1117/12.2672542

KEYWORDS: Diamond, Photoluminescence, Excimer lasers, Imaging spectroscopy, Fluorescence, Spectroscopy, Deep ultraviolet

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Proceedings Article | 28 September 2023 Presentation + Paper

Photochromic gemstone analysis using in situ absorption spectroscopy

Tsung-Han Tsai, Ulrika F. D’Haenens-Johansson, Zhen Wang

Proceedings Volume 12665, 126650J (2023) https://doi.org/10.1117/12.2672807

KEYWORDS: Diamond, Color, Light sources and illumination, Absorption spectrum, Absorption, Ultraviolet radiation, Absorption spectroscopy, Light sources, Light absorption, Chemical vapor deposition

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Proceedings Article | 3 October 2022 Presentation + Paper

Automatic jewelry identification and evaluation based on imaging-assisted Raman spectroscopy

Tsung-Han Tsai, Hiroshi Takahashi

Proceedings Volume 12216, 1221609 (2022) https://doi.org/10.1117/12.2631779

KEYWORDS: Diamond, Raman spectroscopy, Spectroscopy, Luminescence, Minerals, Cameras, Imaging spectroscopy, Imaging systems

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Proceedings Article | 7 September 2021 Presentation + Paper

Multi-excitation fluorescence imaging for identifying clarity enhancement in gemstones

Tsung-Han Tsai

Proceedings Volume 11815, 1181505 (2021) https://doi.org/10.1117/12.2592939

KEYWORDS: Luminescence, Ultraviolet radiation, Absorption, Imaging systems, Light emitting diodes, Image enhancement, Visualization, Optical filters, Imaging spectroscopy

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Proceedings Article | 21 August 2020 Presentation + Paper

Rapid detection of color-treated pearls and separation of pearl types using fluorescence analysis

Tsung-Han Tsai, Chunhui Zhou

Proceedings Volume 11483, 1148307 (2020) https://doi.org/10.1117/12.2566590

KEYWORDS: Luminescence, Fluorescence spectroscopy, Ultraviolet radiation, Spectroscopy, Spectroscopes, Spectrometers, Light emitting diodes, Visualization

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Showing 5 of 6 publications

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