Method and polarimetric analyzer of the three-dimensional infrared diffusion of an object by means of a parabolic mirror mounting has

polarimetric method and device for analyzing the three-dimensional infrared diffusion of an object by means of a mirror assembly parabolique.L'objet (2) is illuminated by an incident infrared radiation (32) through the mirror (30) following a determined angle of incidence. This mirror reflects the radiation towards the object so that the radiation (36) scattered by the latter. Detecting the radiation scattered along a determined diffusion angle is varied and the angle of incidence and scattering angle. According to the invention the incident radiation is polarized and circulated and is varied their polarizations. The invention is particularly applicable to the characterization of materials.