Centre National De La Recherche Scientifique

Thales

Centre National Detudes Spatiales

Université´ D'aix-Marseille

Societe Europeenne De Systemes Optiques

Thales Seso

Université De Provence - Aix Marseille 1

Marc Ferrari

Emmanuel Hugot

Christian De Mollerat Du Jeu

Marie Laslandes

Nicolas Tetaz

Arnaud Liotard

Jean-François Carre

Gérard Lemaitre

Grégoire Hein

Wilfried Jahn

A telescope includes an initial telescope comprising a concave first mirror and a convex second mirror that are configured so that they form, from a light beam coming from infinity, an image called the intermediate image in a focal plane called the intermediate focal plane, the intermediate image having a largest dimension along an X-axis perpendicular to an optical axis of the telescope, a segmenting module comprising a first set of n segmenting mirrors that are placed downstream of the intermediate focal plane and that are configured to divide the intermediate image obtained from the intermediate focal plane into n sub-images, a second set of n refocusing mirrors that are configured to reimage the n sub-images into n images in a focal plane of the telescope, the images being arranged in the focal plane so as to decrease the dimension along X containing the n images, a detecting device placed in the focal plane.

Cassegrain telescope with a segmented focal plane

A method of shaping an aspherical optical element is provided that includes the steps of fastening an optical element blank to a ring, the blank presenting an optical surface that is to be shaped and a surface referred to as a rear surface; applying forces and moments to the ring in order to deform the optical element and its optical surface, which element is fastened to the ring; using abrasion to shape said deformed optical surface so as to restore a spherical or planar shape thereto; and extracting the blank from the ring so as to release the stresses deforming said shaped optical surface so as to allow it to acquire the desired aspherical shape. The method also includes the step of fastening the blank to the ring is performed by bonding the optical surface or the rear surface to a surface of the ring with a layer of adhesive.

Method of shaping an optical element that is elastically deformed by an adhesively-bonded ring

The invention relates to a device for correcting at least one optical aberration, of known evolution of an optical system, the device comprising: a deformable mirror () having a contour; means () for deforming the mirror; characterized in that the mirror () has a geometry selected such that the contour of the mirror () is defined from a composite function of said at least one aberration and in that the means () for deforming the mirror are adapted to apply a flexing moment on the edges of the mirror, the deformable mirror being concave or convex when it is deformed.

Correction device of at least one aberration of known evolution with deformable mirror

Optical devices can comprise a deformable mirror and a system for deforming said mirror. A deformation system comprises a first mechanical structure comprising a first surround, one or more electromechanical actuators attached to the first mechanical structure, a second mechanical structure comprising a substantially planar bottom and a second surround, both deformable, the bottom being attached to the first surround, the second surround being attached to the surround of the mirror, a rigid stud being attached to the bottom, substantially planar and centerd on the bottom, the electromechanical actuator or actuators exerting predetermined forces or bending moments on the stud so as to generate a particular distribution of the bending moments on the surround of the mirror, deforming it according to a geometrical form representative or of one or more predetermined geometrical aberrations.

Mirror comprising mechanical means for generating primary geometrical aberrations

A method of shaping an aspherical optical element, such as a composite mirror element, the method comprising the following steps:

Method of shaping an aspherical optical element

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Marseilles, France

Marc Ferrari