Approximate analytical effective phase function obtained for a thin slab geometry
Article dans une revue avec comité de lecture
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
The reflection and transmission of light from a slab containing a turbid medium provide a scattering effective phase function from which the true optical anisotropy factor may not be always easily retrieved. From the statistical Poissonian theory and thanks to approximations about the optical path related to the first scattering events, a simplified relationship is established between angular phase function and effective phase function. Therefore, with a modified Gegenbauer or a Two-Terms Henyey-Greenstein phase function, some adjustable analytic functions are proposed in order to fit the measurements linked to the true effective phase function. An efficiency of the approximate analytical function is proved, thanks to the light modelling by Monte Carlo method, for optical thickness lower or equal to 2. This is confirmed by comparisons of the anisotropy retrieval with other methods. Concerning applications, several fits were made on experimental effective phase functions corresponding to goniometric measurements from usual diffusing materials and biological tissues.
Files in this item
Showing items related by title, author, creator and subject.
Light source distribution and scattering phase function influence light transport in diffuse multi-layered media Article dans une revue avec comité de lectureVAUDELLE, Fabrice; L'HUILLIER, Jean-Pierre; ASKOURA, Mohamed Lamine (Elsevier, 2017)Red and near-Infrared light is often used as a useful diagnostic and imaging probe for highly scattering media such as biological tissues, fruits and vegetables. Part of diﬀusively reﬂected light gives interesting information ...
Article dans une revue avec comité de lectureASKOURA, Mohamed Lamine; VAUDELLE, Fabrice; L'HUILLIER, Jean-Pierre (MDPI, 2016)This work aimed at high lighting the role played by the skin in the light propagation through the apple ﬂesh. A multispectral Visible-Near Infrared (Vis-NIR) steady-state imaging setup based on the use of four continuous ...
Influence of the size and skin thickness of apple varieties on the retrieval of internal optical properties using Vis/NIR spectroscopy: A Monte Carlo-based study Article dans une revue avec comité de lectureVAUDELLE, Fabrice; L'HUILLIER, Jean-Pierre (Elsevier, 2015)Visible/near-infrared spectroscopy is a well-established method to measure optical properties of tissues, assuming that a light propagation model can be used to recover absorption and reduced scattering coefficients from ...
Article dans une revue avec comité de lectureASKOURA, Mohamed Lamine; VAUDELLE, Fabrice; L'HUILLIER, Jean-Pierre (MDPI, 2015)This paper reports on the quantiﬁcation of light transport in apple models using Monte Carlo simulations. To this end, apple was modeled as a two-layer spherical model including skin and ﬂesh bulk tissues. The optical ...
Light scattering in thin turbid tissue including macroscopic porosities: A study based on a Monte Carlo model Article dans une revue avec comité de lectureVAUDELLE, Fabrice (Elsevier, 2018)A Monte Carlo code is built taking into account macroscopic spheroid cavities inside a turbid medium, i.e. in mixing Multi-Layer Monte Carlo (MLMC) and Monte Carlo Ray Tracing (MCRT). That simulates a tissue with a strong ...