Contribution à l'étude des propriétés optique des milieux diatténuateurs

Abstract

When crossing or reflecting on a medium, the components of the electric field can be modified in terms of diattenuation, retardance and depolarization. The study of these modifications provides information on the study environment. This means of characterization has proved its worth in many fields. In this work, we present a method used for the discrimination of optical and particularly polarimetric properties of certain optical media such as diattenuator media. Based in this method on a simulation model developed under MATLAB and LabVIEW to describe the Mueller matrix, a transfer matrix can provide considerable information about the optical characteristics of a sample. Since the reading and extraction of information from this Mueller matrix is not immediate, algorithms for decomposing and classifying this non-depolarizing matrix have been developed. This is validated on different diattenuating media. An application in the field of polymers has been desired, the objective of which is to test the potentiality of the method proposed as a means of physico-chemical investigation for the study of the optical properties of a polymer (polypropylene) melted at different temperatures and mixed by small quantities of clay whose objective is to know the influence of the latter on the optical properties of polyethylene