Fig. 9.

(left) Measured total attenuation coefficients µ_t of absorbing SiliGlass phantoms from series a, b, c, d, e, f (increasing in concentration and absorption). (right) Normalized total attenuation coefficient µ_t (see text for details) as a function of concentration in the absorbing SiliGlass phantoms (black crosses represent measured normalized µ_t and red line the ideal linear relationship with the concentration). The navy blue line shows the absolute deviation δµ_t of the total attenuation coefficient from the ideal linear relationship at a single wavelength point (633 nm).