26 February 2010 Measuring distance through turbid media: a simple frequency domain approach
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Abstract
In both industry and medicine there is no optical technique to measure distance through light scattering media. Such a technique may be useful for localizing embedded structures, or may be a non-contact method of measuring turbid media. The limits of a frequency domain based technique were explored in three polyurethane optical phantoms. We have demonstrated a simple method to measure the distance between an intensity modulated light source and detector in turbid media based on the proportionality of the phase lag to the distance. The limits of the technique were evident for distances less than 5 mm, particularly when μ1s <0.1mm-1 and distances greater than 55mm for the phantoms studied. This method may prove useful in industry and medicine as a non destructive way measure distance through light scattering media.
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A. L. Dayton, N. Choudhury, S. A. Prahl, "Measuring distance through turbid media: a simple frequency domain approach", Proc. SPIE 7573, Biomedical Applications of Light Scattering IV, 757304 (26 February 2010); doi: 10.1117/12.842682; https://doi.org/10.1117/12.842682
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