Patent Document ID: 7777880
Application ID: 11793674
Patent Flag: 1

Claim One:
1. A polarimetric measurement method of a planar object carrying regularly repeated patterns and forming lines of a grid including generation of an excitation incident beam on said object forming a measuring beam whereof the orientation relative to the object is represented by an angle of incidence θ and an azimuthal angle φ, said method comprising: carrying out a first measuring at zero order, under an angle of incidence θ 1 and for a first azimuthal angle φ 1 , carrying out a second measurement at least at zero order, under an angle of incidence θ 2 and for a second azimuthal angle φ 2 , modulating the polarisation of the incident beam and analyzing the polarisation of the reflected beam for each measurement so as to obtain experimental polarimetric data, calculating theoretical polarimetric data for a model object of the real object, said model object including parameters adjustable using a formalism of electromagnetism, conducting an iterative comparison of the measurements with the theoretical polarimetric data for different values of the adjustable parameters to characterize the object.