Essilor International (compagnie Generale D'optique)

Essilor International Cie Generale D'optique

Centre National De La Recherche Scientifique

Essilor International

Jean Taboury

Dominique Baude

Pierre Chavel

Denis Joyeux

Benjamin Rousseau

Thierry Bonnin

Sylvain Perrot

Raymond Mercier

Jean-Claude Meslard

Gerard Obrecht

Daniel Joseph Lougnot

A linear fluidic actuator comprising an upper actuation deformable surface suitable to induce a displacement in an actuation direction L and a wall delimiting an internal cavity wherein the shape of the actuator is a pillar; the wall, the cavity and the upper surface of a base form the lower part of said pillar, where his the highest dimension of the internal cavity at rest according to the actuation direction L; a part forms the upper part of said pillar where the upper surface of said upper part is the upper actuation deformable surface, the bottom surface of said upper part closes the upper part of the cavity so as to form an upper surface of said cavity and where his the distance at rest from the top of the upper surface of the internal cavity to the upper actuation deformable surface; the height ratio h/his comprised between 0.2 and 10; a fluidic inlet is provided and suitable for introducing a fluid in the internal cavity.

Linear fluidic actuator

An adjustable optical device comprising at least a deformable optical surface activated by linear fluidic actuators comprising: a material layer comprising an upper surface on which the optical surface is provided and a bottom surface; an actuator layer comprising a plurality of linear fluidic actuators separated by at least one cavity, where at least one linear fluidic actuator is a pillar extending in the actuation direction (L) which is non parallel to the bottom surface of the material layer, said pillar comprising a wall delimiting an internal cavity and where an upper surface of said pillar is continuously linked to a zone of the bottom surface of the material layer; fluidic inlets suitable for introducing a fluid in at least one internal cavity of a pillar linear fluidic actuator.

Optical device with adjustable optical surface

Method of manufacture of a lens of transparent polymer having a

The manufacture of an artificial optical lens having any given power profile starts from an artificial optical lens having a different power profile. A physical-chemical treatment method modifies the power profile to obtain a required power profile. A rotating mask is used for spatial modulation of the energy flux.

Artificial optical lens and method of manufacturing it

Disclosed is an ophthalmic lens which characteristically comprises at least two concentric regions having diffractive components with different phase profiles in order to use different orders of diffraction. The diffractive components may be formed by holograms in relief or index holograms.

Multiple contour diffractive lens

A diffractive contact lens in relief includes a smoothing layer (50) of optically transparent material having a smooth outside surface (51) and placed over the optical surface (16) in relief so as to immerse the relief.

Diffractive contact lens in relief

The present invention relates to an optical lens for correcting astigmatism. It includes diffractive components whose outlines are delimited by conic section curves having non-degenerate centers. More precisely, in accordance with the invention, the lens includes adjacent diffractive components having hyperbolic or elliptical outlines with a periodicity in r.sup.2 in two mutually orthogonal directions x and y intersecting on the axis of the lens and coinciding with the main axes of the hyperbolas or of the ellipses, which are determined respectively by the equations: .DELTA.r.sub.x.sup.2 =2.lambda..vertline.f.sub.x .vertline.; and .DELTA.r.sub.y.sup.2 =2.lambda..vertline.f.sub.y .vertline.; in which: .DELTA.r.sub.x.sup.2 represents the periodicity in r.sup.2 along the x direction; .DELTA.r.sub.y.sup.2 represents the periodicity in r.sup.2 along the y direction; .lambda. represents the mean utilization wavelength; f.sub.x represents the desired focal length in the X direction; and f.sub.y represents the desired focal length in the Y direction.

Growing community of inventors

Sceaux, France

Jean Taboury