Optical waveguides – Optical waveguide sensor
Reexamination Certificate
2005-02-01
2005-02-01
Font, Frank G. (Department: 2877)
Optical waveguides
Optical waveguide sensor
C356S446000, C356S445000, C356S432000, C356S012000
Reexamination Certificate
active
06850656
ABSTRACT:
We present a method and apparatus for local and superficial measurement of the optical properties of turbid media. The depth probed is on the order of 1 transport mean free path of the photon. The absorption coefficient, reduced scattering coefficient and the phase function parameter γ=(1−g2)/(1−g1) are optical parameters computed from a single measurement of the spatially resolved reflectance close to the source. Images of superficial structures of the medium can be obtained by performing multi-site measurements. An important application of this technique is the characterization of biological tissues, for example for medical diagnostic purposes. Measurements on biological tissues can be achieved using a probe of diameter less than 2 mm, and the average volume probed is on the order of 1 mm3. Separate images of absorption and tissue structure can be achieved with a resolution of approximately one transport mean free path of the considered tissue.
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Bevilacqua Frederic
Depeursinge Christian
Ecole Polytechnique Federale de Lausanne
Font Frank G.
Kianni Kevin C
Nixon & Vanderhye PC
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