Diffuse Reflectance Spectroscopy of Human Skin Using a Commercial Fiber Optic Spectrometer

2008 ◽  
Author(s):  
J. A. Delgado Atencio ◽  
M. Cunill Rodríguez ◽  
S. Vázquez y Montiel ◽  
J. L. Gutiérrez ◽  
F. Martínez ◽  
...  
Keyword(s):  
Human Skin ◽  
Diffuse Reflectance ◽  
Fiber Optic ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy

scholarly journals Autofluorescence and diffuse reflectance spectroscopy of oral epithelial tissue using a depth-sensitive fiber-optic probe

2008 ◽  
Vol 47 (6) ◽  
pp. 825 ◽  
Author(s):  
Richard A. Schwarz ◽  
Wen Gao ◽  
Dania Daye ◽  
Michelle D. Williams ◽  
Rebecca Richards-Kortum ◽  
...  
Keyword(s):  
Diffuse Reflectance ◽  
Fiber Optic ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Epithelial Tissue ◽  
Fiber Optic Probe ◽  
Optic Probe ◽  
Oral Epithelial

Diffuse reflectance spectroscopy of human skin lesions

2005 ◽  
Author(s):  
M. Cordo ◽  
J. R. Sendra ◽  
A. Viera ◽  
S. M. Lopez Silva
Keyword(s):  
Human Skin ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Skin Lesions ◽  
Reflectance Spectroscopy

scholarly journals Optical properties of living corals determined with diffuse reflectance spectroscopy

2019 ◽  
Author(s):  
Steven L. Jacques ◽  
Daniel Wangpraseurt ◽  
Michael Kühl
Keyword(s):  
Optical Properties ◽  
Diffuse Reflectance ◽  
Fiber Optic ◽  
Diffuse Reflectance Spectroscopy ◽  
Light Exposure ◽  
Diffusion Theory ◽  
Reflectance Spectroscopy ◽  
Lateral Spread ◽  
Coral Tissue ◽  
Live Coral

AbstractThe internal light field and thus light exposure of the photosymbiotic microalgae (Symbiodinium sp.) in corals is strongly modulated by the optical properties of coral tissue and skeleton. While there are numerous studies documenting the light microenvironment in corals, there are only few measurements of the inherent optical properties of corals in the literature, and this has hampered a more quantitative understanding of coral optics. Here we present a study of the optical properties of 26 live coral samples, representative of 11 coral species and spanning a variety of morphotypes. We employed well-established fiber-optic reflectance spectroscopy techniques from biomedical optics using two methods: (1) A source and a detection fiber separated by a variable distance measured the lateral spread of light in corals, dominated by the skeleton; (2) A fiber-optic field radiance probe measured the diffuse reflectance from the coral surface, dominated by the living coral tissue. Analysis based on diffusion theory and Monte Carlo simulation yielded estimates of the bulk scattering and absorption coefficients of the coral tissue and skeleton, in the 750-1030 nm wavelength range. Extrapolating into the spectral region of photosynthetically active radiation (PAR, 400-700 nm) allowed estimation of the optical depth of absorption by the main Symbiodinium photopigment chlorophyll a. Coral tissue scattering was on average ~1.9x stronger than the scattering of the skeleton, consistent with the model that corals trap photons by high scattering to enhance absorption by algal pigments, while the lower scattering of the skeleton allows spread of light to otherwise shaded coral tissue areas.

Influence of probe pressure on human skin diffuse reflectance spectroscopy measurements

2009 ◽  
Vol 18 (1) ◽  
pp. 6-14 ◽  
Author(s):  
J. A. Delgado Atencio ◽  
E. E. Orozco Guillén ◽  
S. Vázquez y Montiel ◽  
M. Cunill Rodríguez ◽  
J. Castro Ramos ◽  
...  
Keyword(s):  
Human Skin ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy
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