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1 January 2006 Modulation of an optical needle's reflectivity alters the average photon path through scattering media
Paul Simonson, Enrico D'Amico, Enrico Gratton
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Journal of Biomedical Optics, Vol. 11, Issue 1, 014023 (January 2006). https://doi.org/10.1117/1.2168167
Abstract
We introduce the concept of deliberate placement of absorbers to alter the average path of photons through tissue for a biomedical optical device. By changing the reflectivity of a needle that separates a source and detector, the average photon path through a turbid medium can be changed. Totally reflective needles have photon scattering density functions similar to a point source and detector in an infinite medium. An absorbing needle moves the average photon path of photons that reach the detector away from the needle. Thus, by modulating the reflectivity of the needle, it is possible to modify the sensitive volume, and simple tomography data should be possible. These results are confirmed by Monte Carlo simulations and experiment. Experiments include moving a black target relative to an optical "needle" and measuring the resulting intensity and phase lag of light reaching a detector at the distal end of the needle.
©(2006) Society of Photo-Optical Instrumentation Engineers (SPIE)
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Paul Simonson, Enrico D'Amico, and Enrico Gratton "Modulation of an optical needle's reflectivity alters the average photon path through scattering media," Journal of Biomedical Optics 11(1), 014023 (1 January 2006). https://doi.org/10.1117/1.2168167
Published: 1 January 2006
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Cited by 2 patents.
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KEYWORDS
Sensors
Reflectivity
Photon transport
Monte Carlo methods
Diffusion
Tissue optics
Modulation
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