Patent ID: 7852488
Filing Date: 2010-12-14
Classification: G01N

Abstract:
1. A device for characterizing a structure, said device comprising: at least one radiation generator operably generating a pump first radiation and a probe second radiation, said radiation generator operably generating said first and second radiations being suitable for delivering radiations at different wavelengths, a time-shift generator operably generating a time shift between said probe second radiation and said pump first radiation between said radiation generator and a structure, detector operably detecting said second beam after reflection off or transmission through said structure so as to generate a signal to be analyzed, and a processor operably processing said signal; wherein said at least one processor operably identifies a zone corresponding to a jump in said signal, determines the amplitude of said jump as a function of said different wavelengths, compares said amplitude with a theoretical model for variation of the amplitude as a function of wavelength, and determines, for a wavelength that is characteristic of said theoretical model, a characterization value associated with the thickness of said structure and with the speed of propagation of radiation in said structure.