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Reflectance Spectra of Pigmented and Nonpigmented Skin in the UV Spectral Region ¶
Author(s) -
Nielsen Kristian P.,
Zhao Lu,
Juzenas Petras,
Stamnes Jakob J.,
Stamnes Knut,
Moan Johan
Publication year - 2004
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.2004.tb00113.x
Subject(s) - melanosome , scattering , spectral line , materials science , reflectivity , wavelength , radiative transfer , optics , melanin , diffuse reflection , light scattering , human skin , molecular physics , optoelectronics , chemistry , physics , biology , biochemistry , genetics , astronomy
We present measurements of reflectance spectra from human skin in vivo in the spectral range from 250 to 700 nm. These measurements show that the reflectance from strongly pigmented skin is higher than that from weakly pigmented skin at wavelengths shorter than approximately 300 nm. We simulate the measured results using a new radiative transfer model developed to study light propagation in skin tissue. Our simulations mimic the measured spectra when scattering from melanosomes, and fragmented melanosomes are taken into account. Scattering from microstructures with high relative refractive indices plays a major role in tissue optics. Our results show that scattering from melanosomes and fragmented melanosomes is of particular significance.