Varioptic S.a.

Varioptic

Laclaree

Université Joseph Fourier

Parrot

Parrot Drones

Parrot S.a.

Invenios France

Bruno Berge

Mathieu Maillard

Jérôme Peseux

Julien Legrand

Pierre Craen

Frédéric Laune

Nicolas Verplanck

Yves-Sebastien Boulin

Gaëtan Liogier D'ardhuy

Hilario Gaton

Jérome Peseux

Jerome Peseux

Eric Simon

Olivier Jacques-Sermet

Gaëtan Liogier D'ARDHUY

Jean-Yves Sébastien Boulin

Simon Kulifaj

The present invention relates to an electrostatically actuated device comprising at least first chamber, an electrode chamber comprising a deformable electrode. The deformable electrode is disposed in the electrode chamber such as to form a first electrode chamber and a second electrode chamber.

Electrostatically actuated device

This invention relates to ophthalmic lens for spectacle comprising a primary glass, a secondary glass, a main chamber and a membrane configured to separate the volume of the main chamber in a first chamber and a second chamber.

Ophthalmic lens with dynamic focus control

A method for interactive adjustment of a parameter of a continuously variable optical lens involving having a subject view an eye chart through a variable lens frame comprising at least one continuously variable optical lens, applying a modulation to a selected parameter of said continuously variable optical lens around an average value, and tuning said average value by minimizing the flickering visible to the subject and due to the modulation.

Methods and devices for interactive adjustment of a parameter of a continuously variable optical lens

The invention concerns an optical electrowetting device a body comprising at least a first external surface and a second internal surface with a conical shape; a liquid-liquid interface between a first and a second immiscible liquids, the first liquid being a conducting liquid and the second liquid being an insulating liquid, wherein the liquid-liquid interface is able to move on the second internal surface by electrowetting effect; a first electrode in contact with the first liquid; a second electrode insulated from the first liquid by an insulating layer, the second electrode comprising at least a first electrical conductive track to be connected to a voltage source and extending from the first external surface of the body to the second internal surface; and a first layer covering the second internal surface of said body and being covered by the insulating layer, wherein the shape of the liquid-liquid interface is controllable by application of at least a first voltage between the first electrode and the first electrical conductive track, and wherein at least one of the body or the first layer is made of a resistive material.

Optical electrowetting device

According to a first aspect, the invention relates to an electrically controlled focusing ophthalmic device () to be worn by a user, comprising:&#x2014;at least one active liquid lens comprising a liquid/liquid interface movable by electrowetting under the application of a voltage,&#x2014;a driver for applying a DC voltage to said active liquid lens, the amplitude of the voltage to be applied being a function of the desired focusing;&#x2014;a sensor () for detecting eyelid closing events and/or microsaccades of the user;&#x2014;a controller for synchronizing said sensor and the driver, such that the driver may reverse the polarization of the DC voltage during a microsaccade and/or an eyelid closing event of the user.

Electronically controlled focusing ophthalmic device

A method of controlling a liquid lens in an imaging device, the liquid lens including a liquid-liquid interface between first and second immiscible liquids deformable by electrowetting; a chamber containing the first and second liquids, the first liquid being an insulating liquid and the second liquid being a conducting liquid; and a first electrode in contact with the second liquid and at least one second electrode insulated from the second liquid by an insulating layer, the first and second electrodes being arranged to allow a plurality of voltages levels to be applied between the first and second electrodes to control the curvature of the liquid-liquid interface, the method including: determining motion data representative of a movement of the imaging device; determining focusing data representative of a desired focus of the imaging device; determining the plurality of voltage levels to be applied between the first and second electrodes, wherein each of the voltage levels is a function of the motion data, the focusing data and at least one parameter relating to the liquid lens and preliminary determined in a calibration phase.

Image stabilization circuitry for liquid lens

A method for calibration in the field of imaging systems and imaging systems using the method for calibration. In particular, the method involves calibration in the field of open loop variable focus imaging systems and methods for calibration in the field of imaging system having a variable optical parameter.

Calibration methods for imaging systems and imaging systems using such

The invention concerns an electrowetting optical device comprising a chamber () comprising first and second immiscible liquids () contacting each other at a liquid-liquid interface (), the first liquid being an insulating liquid and the second liquid being a conducting liquid; a first electrode () in the contact with the second liquid; and a second electrode () insulated from the first and second liquids by an insulating layer, wherein the second electrode is formed of a conductive molded polymer material, wherein the curvature of said liquid-liquid interface is controllable by application of a voltage between said first and second electrodes.

Electrowetting device with polymer electrode

The invention concerns an optical lens comprising a cavity formed by two transparent windows and a peripheral frame positioned in between, said cavity containing first and second liquids, non miscible, forming an interface, said interface being movable by electrowetting on a wall of said peripheral frame by application of a voltage between first and second electrodes, wherein said wall has a non symmetrical revolution surface, the geometrical shape of which is calculated such that said interface is of a predetermined shape, for example substantially spherical, for at least one value of said voltage.

Optical lens with variable focal length

The invention relates to an optical electrowetting device comprising a conductive fluid () and a non-conductive fluid (), said fluids being non miscible, and an insulating substrate () on which both fluids are in contact and form a triple interface, wherein the natural contact angle () of the non-conductive fluid () on the substrate () in presence of the conductive fluid () is comprised between 0&#xb0; and about 20&#xb0;. This device may be a variable focus liquid lens, an optical diaphragm, an optical zoom. The invention further relates to an apparatus such as a camera, a cell phone, an endoscope or a dental video camera, comprising said electrowetting device and a driver or electronic means for controlling the lens.

A variable-focus lens that includes a wall made of an insulating material, a drop of an insulating liquid arranged on an area of a first surface of the wall, a conductive liquid covering the first surface and the drop, and an electrode arranged on a second surface of said wall. The insulating and conductive liquids are non-miscible, having different optical indexes and substantially the same density. The drop of the variable-focus lens is centered in a truncated cone centered on an axis perpendicular to the first surface, the bottom of which is pierced with a centered hole, and the insulating material wall is transparent and covers the hole.

Drop centering device

The invention relates to a variable-focus lens comprising two opposing walls () which are orthogonal to the axis of the lens and which define a space containing an isolating liquid () on the first wall () and a conductive liquid () which covers the isolating liquid and which comes into contact with the second wall (). The surface () of the first wall () has high wettability for the isolating liquid and low wettability for the conductive liquid, while the surface () of the second wall () has high wettability for the conductive liquid and low wettability for the isolating liquid.

Variable-focus lens

A method for centering a drop of liquid on a given point on a surface. The inventive method consists in forming a bell-mouthed recess, whereby said recess has a curvature at any point at the limit of contact between the drop and the recess that is lower than or opposite to the curvature of a circle (TC) that is tangent to the surface of the recess to said point and at a symmetrical point (CP) of said surface.

A lens assembly of variable focal length comprises two transparent plates () at least partially facing each other and parallel to one another and delimiting, at least in part, an internal volume () containing two non-miscible liquids having different optical indices. The lens comprises an elastic element () capable of deforming in response to a change in pressure of the liquids, in such a way as to substantially maintain the optical properties of the lens assembly, e.g., in order to maintain the parallelism of the two transparent plates.

Lens of variable focal length

The invention relates to a variable-focus lens () for focusing light rays in light paths passing through the lens along an optical axis (&#x394;). The lens comprises an arrangement of first and second immiscible liquids () that have different refractive indices and are in contact over a moveable refractive optical interface (), a volume of gas () in contact with one of said liquids, and a retention measure () for keeping the volume of gas away from the light paths of the light rays passing through the lens for focusing.

Growing community of inventors

Lyons, France

Bruno Berge