Centre National De La Recherche Scientifique

G&eacute;rald Roosen

Gilles Pauliat

Patrick Georges

Philippe Delaye

Alain Brun

Nicolas Huot

Jean-Michel Jonathan

Laser type source of coherent luminous radiation including a resonant cavity, an amplification medium placed in the resonant cavity and a dynamic photosensitive material which is placed in the resonant cavity to form a self-adapting spectral and/or spatial filter, characterized in that the cavity is a ring laser cavity and in that the dynamic photosensitive material is placed at the intersection of two beams.

Self-adapting filters for fine-tuning laser emissions

A process for velocimetric measurement of a target including causing interference in a dynamic holographic material of a reference laser beam and a beam diffused by the target, and measuring variations in luminous intensity transmitted by the material with a photoelectric detector, wherein the target vibrates with a displacement greater than the wavelength and with an extension limited around a mean position.

Dynamic holographic velocimeter for the measurement of vibrations

Growing community of inventors

Orsay, France

Gérald Roosen

Growing community of inventors

Orsay, France

G&eacute;rald Roosen

Gérald Roosen