Ecole Polytechnique

Centre National De La Recherche Scientifique

Emmanuel Jean-Marc Beaurepaire

Nicolas Olivier

Delphine Debarre

Jean-Louis Martin

Mathias Strupler

Israël Veilleux

Marie-Claire Schanne-Klein

Pierre Mahou

Delphine Malvina Daniele Marie Debarre

Israel Veilleux

Delphine Malvina Danièle Marie Debarre

Jean Louis Martin

A nonlinear optical microscope is provided, including source of a pulsed laser beam; a spatial light modulator for modulating the spatial profile of the pulsed laser beam; an objective for guiding the modulated beam towards a slide intended to carry a specimen; and a detector for collecting signals originating from the specimen, wherein the spatial light modulator is designed to modulate the intensity and/or the phase of the pulsed laser beam on the rear pupil of the objective to produce a beam that is axially extended and confined in one or two lateral directions after focusing by the objective, and wherein the slide is placed on a motorized stage of a histology slide scanner assembly.

Quantitative nonlinear optical microscopy using a shaped beam

A method for acquiring signals in laser scanning microscopy, includes the steps of: moving a focused optical excitation beam relative to an object to be measured so that the focus point of the beam follows a predetermined path in the space of the object; and acquiring optical measurement signals along the path according to at least one acquisition parameter; characterized in that the path of the excitation beam is determined so as to substantially minimize the variations of the optical properties of at least one portion of the environments crossed by the excitation beam between consecutive acquisitions, and in that at least one acquisition parameter among the acquisition parameters is modulated during the movement of the excitation beam. A device for implementing the method is also described.

Method and device for acquiring signals in laser scanning microscopy

A method for the dimensional characterization of a structured material, in which method: an excitation laser beam suitable for coherent nonlinear microscopy is generated, this excitation laser beam being focused in a focal volume within the structured material; signals emitted by the structured material are detected; a plurality of emission patterns, each corresponding to one particular shape of the focal volume, is produced, the particular shapes being obtained for various non-Gaussian spatial profiles of the excitation laser beam wavefront; and on the basis of the emission patterns thus produced, dimensional characteristics of the structured material are deduced therefrom.

Coherent nonlinear microscopy system and method with variation of the focal volume in order to probe the nanostructure of organized materials

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Palaiseau, France

Emmanuel Jean-Marc Beaurepaire