@article{moes89,
  author = {C. J. M. Moes and M. J. C. van Gemert and W. M. Star and J. P. A. Marijnissen and S. A. Prahl},
  title = {Measurements and Calculations of the Energy Fluence Rate in a Scattering and Absorbing Phantom at 633\,nm},
  journal = {Appl. Opt.},
  year = {1989},
  volume = {28},
  pages = {2292--2296},
  abstract = {We have studied the influence of absorption, scattering, and refractive index of a phantom medium in conjunction with various beam diameters on the penetration depth of light at 633\,nm. We used mixtures of Intralipid 10\% (scattering medium) and Evans blue (absorbing medium). Measurements were performed in media with a scattering coefficient of 1/mm, an anisotropy factor of 0.71, absorption coefficients of 0.0013, 0.01, and 0.05/mm, and a refractive index of 1.33. The experimental results were compared with an analytical solution of the fluence rate based on diffusion theory. We found good agreement (deviations of $<$10\%) between theory and experiment for incident beam diameters between 10 and 60\,mm.},
}