Abstract
The response of an isotropic light dosimetry probe as function of the tissue refractive index (n) has been calculated using diffusion theory. The response has also been measured in a collimated light beam with the probe in air, water (n = 1.33), ethylene glycol (n = 1.43), and glycerin (n = 1.46). For a 3.2-mm diam probe with little light absorption, the theoretical result depends only on n and differs from the experimental data by not more than 6%. For a 0.8-mm diam probe with some light absorption, excellent agreement between theory and experiment is obtained by adjusting the absorption and the reduced scattering coefficients of the probe material.
© 1989 Optical Society of America
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