A New Method For Quality Assessment of Anti-UV Creams Using Optical Polarization: Modeling and Simulation

Ghassemi, Pejman; Miranbaygi, Mohammad Hossein

doi:10.22041/ijbme.2008.13420

A New Method For Quality Assessment of Anti-UV Creams Using Optical Polarization: Modeling and Simulation

Document Type : Full Research Paper

Authors

Pejman Ghassemi ¹

Mohammad Hossein Miranbaygi ²

¹ Ph.D. Candidate, Biomedical Engineering Group, Electrical and Computer Engineering School, Tarbiat Modares University

² Assistant Professor, Biomedical Engineering Group, Electrical and Computer Engineering School, Tarbiat Modares University

10.22041/ijbme.2008.13420

Abstract

In this research we present a new method to evaluate changes in size and refractive index of Titanium dioxide (TiO₂) nanoparticles which are the main component of anti-UV creams. The main objective of this research is assessing the impact of changing in size and refractive index of TiO₂ on the polarization state of backscattered light. The proposed technique is based on modeling the propagated polarized laser beam inside a phantom and evaluating the change in the polarization of backscattered light. The phantom is simulated by software to have the polarization properties of anti-UV creams. As scattering particles (TiO₂) in these creams configure polarization properties, then through modeling we have simulated the phantom with matrix of resin epoxy that has unit refractive index including Titanium dioxide nanoparticles. It will be shown that size parameter and relative refractive index of these particles influence cream's properties like purity, quality, coating power and degree of filtration and directly affect its polarization properties. The measurement technique which is presented here is based on scattering polarimetry. To assess the scattering phenomenon, the polarization state of incident and backscattered light is analyzed by simulating a laboratory polarimeter. Then polarization information of the simulated phantom is extracted as Mueller matrix and degree of polarization index. All modeling and simulations are performed in MATLAB 2006 and the results are presented towards the end part of the paper. The main outcome of this research is the ability of extracting and the recognition of those elements of the Mueller matrix which are very sensitive to changes in size parameter and relative refractive index of TiO₂. That will define the main markers for quality assessment of anti-UV creams.

Keywords

Modeling

Anti-UV

Titanium dioxide

State of polarization

Moeller matrix

Subjects

Biological Computer Modeling / Biological Computer Simulation

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