High-precision frequency-domain measurements of the optical properties of turbid media
Optics Letters, Vol. 24, Issue 14, pp. 930-932 (1999)
http://dx.doi.org/10.1364/OL.24.000930
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Abstract
We report high-precision measurements of the absorption and the reduced scattering coefficients for turbid media. Using a frequency-domain measurement technique for a point-source infinite-medium geometry, we find that the standard deviations of multiple measurements of the absorption coefficient μa and the reduced scattering coefficient μs′ are less than 0.6%, and three independently derived values for μa and μs′ agree to better than 1%. Measurements of μa agree with measurements of a nonscattering medium to within 1.2%. To obtain high precision requires attention to proper conditions for the spherical photon-density wave model, the detection linearity, and the ratio of the absorption rate to the source modulation rate. Frequency-domain amplitude and phase measurements deviate from fitted curves by 0.1% and 0.06 ° rms, respectively.
© 1999 Optical Society of America
[Optical Society of America ]
OCIS Codes
(170.5270) Medical optics and biotechnology : Photon density waves
(170.5280) Medical optics and biotechnology : Photon migration
(170.6510) Medical optics and biotechnology : Spectroscopy, tissue diagnostics
(170.7050) Medical optics and biotechnology : Turbid media
(290.1990) Scattering : Diffusion
(290.4210) Scattering : Multiple scattering
Citation
Martina Gerken and Gregory W. Faris, "High-precision frequency-domain measurements of the optical properties of turbid media," Opt. Lett. 24, 930-932 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-14-930
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