Centre National De La Recherche Scientifique

Office National D'etudes Et De Recherches Aerospatiales (onera)

Ecole Normale Superieure De Cachan

Michel Bernard Lemistre

Dominique Placko

Pierre-Yves Joubert

Jamal Ben Youssef

Francois Lepoutre

Jean-Marc Decitre

Device for health monitoring of a structure comprising a dielectric material of permittivity &#x3b5;, comprising a source of electromagnetic radiation, generating an electric field in the structure a detector measuring a component of the electric field, calculation means giving the value of &#x3b5;on the basis of the said component.

Device and method for health monitoring of an area of a structural element, and structure adapted for health monitoring of an area of a structural element of said structure

A quantitative magneto-optical imaging method is used to form an image of a target material. An active material is placed close to the target material and produces a Faraday rotation in a polarized light beam. The Faraday rotation of the active material is essentially proportional to the magnetization of the target material when this latter is subjected to an exciting magnetic field. Photodetector means detect the beam reflected after passing through the active material. The light from the reflected beam can then be analyzed for obtaining the amplitude and phase of an interfering magnetic field generated by a defect in the target material.

Magneto-optical imaging method and device

Growing community of inventors

Livry-Gargan, France

Michel Bernard Lemistre