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Refractive index measurement using single fiber reflectance spectroscopy.

ABSTRACT: A method using single fiber reflectance spectroscopy to measure the refractive indices of transparent and turbid media over a broad wavelength range is presented and tested. For transparent liquid samples, the accuracy is within 0.2%, and the accuracy increases with increasing wavelength. For liquid turbid media, the accuracy is within 0.3% and increases with decreasing wavelength. For solid turbid samples, such as human skin, the accuracy critically depends on the optical contact between the fiber and sample surface. It is demonstrated that this technique has the potential to measure refractive indices of biological tissue in vivo.

SUBMITTER: Zhang XU

PROVIDER: S-EPMC7065624 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Refractive index measurement using single fiber reflectance spectroscopy.

Zhang Xu U XU Faber Dirk J DJ Post Anouk L AL van Leeuwen Ton G TG Sterenborg Henricus J C M HJCM

Journal of biophotonics 20190403 7

A method using single fiber reflectance spectroscopy to measure the refractive indices of transparent and turbid media over a broad wavelength range is presented and tested. For transparent liquid samples, the accuracy is within 0.2%, and the accuracy increases with increasing wavelength. For liquid turbid media, the accuracy is within 0.3% and increases with decreasing wavelength. For solid turbid samples, such as human skin, the accuracy critically depends on the optical contact between the fi ...[more]

PMID: 30908898

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