in establishing the energetic
and geometrical
characteristics of the heat source at the interface, a quantification of the laser beam scattering is
necessary. Since the use of classical approximation based on the Beer-Lambert law can lead to
inaccurate results in the case of scattering media, a new approach is used. Its detail description is given
in previous works [8] [9]. Basically, it involves two steps: (a) based on measurements of the
transmitted intensity (in % from the incident one) for three thickness of the same semitransparent
material, the scattering characteristics of the media (particles diameter, the relative refractive index and
the particle concentration) are computed by applying an inverse algorithm. This allows obtaining an
equivalent material which produces the same attenuation and broadening of the laser beam as the real
one.