Essilor International

Centre National De La Recherche Scientifique

Essilor International (Compagnie Generale D'optique)

Marius Peloux

Bruno Fermigier

Matthieu Guillot

Björn Drobe

Ludovic Jouard

Stéphane Boutinon

Vincent Roptin

Pierre Chavel

Dominick Hubacz

Benjamin Rousseau

Samuel Archambeau

Konogan Baranton

Guillaume Giraudet

Gilles Le Saux

Mathieu Meynen

Cécile Petignaud

Alexandre Gourraud

Marc Reignault

Philippe Pinault

Hélène De Rossi

Loïc Baillon

Cedric Gilbert

Cédric Gilbert

A method for determining an ophthalmic lens intended to be worn by an individual is provided. The ophthalmic lens is adapted to provide to the individual a vision correction at, at least one, given vision gaze direction. The vision correction is based on wearer data including prescription data of the individual. The method includes the steps of: determining a parameter pertaining to the accommodative dynamics of an eye of the individual, and determining the ophthalmic lens based on the wearer data and on the parameter pertaining to the accommodative dynamics of an eye of the individual. A device is provided for determining the parameter pertaining to the accommodative dynamics of an eye of an individual in the method.

Methods for determining an ophthalmic lens and associated optometry device

A method for determining at least one optical parameter of an eye of a person comprising displaying at least two sharp images on a retina of the eye of the person, the at least two images comprising a target and being carried by two light beams focused substantially in the plane of a pupil of the eye at at least two different positions, adapting a parameter of the target in each image based on feedback of the person relative to the change of the parameter of the target in the image, and determining the at least one optical parameter of the person's eye based on the adaption of the parameter of the target in each image.

Method for determining at least one parameter of an eye of a person

An eyeglass device including a variable transmission ophthalmic lens, a method for driving the transmission of such lens, and a non-transitory computer-readable storage medium for implementing such method. The eyeglass device comprises a light sensor configured for measuring an amount of light in the environment of a wearer and a controlling circuit configured for receiving at least light data from said light sensor and for driving the transmission of said ophthalmic lens on the basis of said light data. The controlling circuit is configured for driving the transmission of said ophthalmic lens on the basis further of movement data, said movement data being derived from an estimation of a movement of the wearer's head.

Eyeglass device and method for driving a variable transmission ophthalmic lens

An optical system intended to be worn in front of an eye of a wearer including an optical lens having at least a control point and an optical device that has a plurality of optical elements, the optical device being attached on a surface of the optical lens or encapsulated into the optical lens, wherein each optical element has simultaneously two different optical functions, and the optical device and the optical lens are configured so that the absolute value of the difference between a measured optical power at the control point of the optical system and the optical power corresponding to the prescription for said eye of the person is smaller than or equal to 0.12 diopter.

Optical system

A system for determining a prescription for an eye of a person, the system being configured to communicate with a mobile device including at least one first light source adapted to illuminate the eye with first light having a first optical wavelength, at least one second light source adapted to illuminate the eye with second light having a second optical wavelength different from the first wavelength, and a processor that measures the photorefraction of the eye at the first wavelength based on at least one picture of the eye recorded when illuminating the eye with first light, measures the photorefraction of the eye at the second wavelength based on at least one picture of the eye recorded when illuminating the eye with second light, determines the prescription for the eye based on the measured photorefraction at the first wavelength and the measured photorefraction at the second wavelength.

Method and system for determining a prescription for an eye of a person

A lens element intended to be worn in front of an eye of a wearer comprising: —a prescription portion configured to provide to the wearer in standard wearing conditions a first optical function based on the prescription of the wearer for correcting an abnormal refraction of said eye of the wearer, and—a plurality of contiguous optical elements, wherein each optical element has a simultaneously bifocal optical function that provides simultaneously: —a second optical function in standard wearing conditions and—a third optical function of not focusing an image on the retina of the eye in said standard wearing conditions so as to slow down the progression of the abnormal refraction of the eye.

Lens element

A variable optical transmission device () comprising: —ariable transmission optics () capable of varying an optical transmission between an initial transmission value (T(t)) and a target transmission value (T), and —a control unit () configured to control a transmission parameter of the variable transmission optics, wherein the control unit () is configured to control a response duration of the variable transmission optics as a function of the initial transmission value (T(t)) and the target transmission value (T).

Variable optical transmission device and associated control method

An optical device including an active programmable lens having an adjustable optical power depending on a prescription of a wearer and being relative to a vision distance and/or direction of an eye of the wearer, a vision sensor adapted to measure vision data relating to the vision distance and/or direction of the eye, and an optical power controller that includes a memory storing computer executable instructions and adapted to store measured vision data and two predetermined optical power states corresponding to an optical power relative to a range of vision distance and/or direction of the eye, and a processor for executing the stored computer executable instructions, which include instructions for adjusting the adjustable optical power between the predetermined optical power states with a resolution smaller than or equal to 0.25 D when the vision data passes from one range of vision distance and/or direction to another.

Optical device adapted to be worn by a wearer

A lens element intended to be worn in front of an eye of a person that includes a refraction area having a refractive power based on a prescription for the eye of the person, and a plurality of at least three non-contiguous optical elements, at least one optical element having a non-spherical optical function.

An optical device, to be used by a user driving a vehicle, the optical device including a controllable variable-tint lens and a controller, where the controller is configured to switch the optical device between at least two different modes, at least one mode being a driving mode and when the optical device is in the driving mode, a control parameter of the lens meets at least one driving criterion.

Optical device and means for detecting driving conditions

The present invention relates to an optical device usable in a head-mounted display which comprises a light conducting element and at least one wafer, and to a head-mounted device which is configured to provide an informative display of augmented reality for a wearer of the head-mounted device and which comprises such an optical device. This optical device () comprises: a light conducting element () which has two first and second opposite main faces (and) and which inputs and conducts by total internal reflections a light () received from the light source () and partially outputs it out of said element, at least one wafer () which comprises an internal surface () facing a said first main face of said light conducting element, and interposition means in contact with said first main face and said internal surface and defining a gap () optically isolating said element. According to the invention, said interposition means comprise a peripheral sealing arrangement () which extends along its peripheral length between and in sealing contact with a peripheral area () of said internal surface and a facing zone () of said first main face, at least one portion of said sealing arrangement exhibiting a locally reduced optical coupling with said first main face to preserve said internal reflections at said at least one portion toward the inside of said element.

Optical device for a head-mounted display, and head-mounted device incorporating it for augmented reality

The invention relates to a variable transmittance device including at least one variable transmittance lens and a control circuit comprising at least one sensor suitable for measuring an illuminance (E), the control circuit being suitable for automatically controlling the value of the transmittance of the variable transmittance lens depending on the illuminance (E) measured by the sensor, wherein the control circuit defines a plurality of successive illuminance ranges (P) each illuminance range (P) being bounded by a minimum illuminance value (Emin) and a maximum illuminance value (Emax), and wherein the control circuit is suitable for controlling the transmittance of the lens to a plurality of setpoint transmittance values (Tv) respectively corresponding to said plurality of illuminance ranges (P).

Plateau-based control of the transmission of a variable transmission lens

A method for determining an optical performance parameter of a head mounted display device adapted for a wearer includes a head mounted display device providing step, during which a head mounted display device adapted for a wearer is provided, an optical measurement device providing step, during which an optical measurement device is provided that includes an entrance pupil and a sensor receiving light through the entrance pupil, a positioning step, during which the optical measurement device and the head mounted display device are positioned so that the position of the entrance pupil of the optical measurement device corresponds to the position of the pupil of the wearer when wearing the head mounted display device, an optical performance parameter determining step during which at least one optical performance parameter of the head mounted see-through display device is determined based on the data measured by the optical measurement device.

Method for determining an optical performance of a head mounted display device

Providing to an eye a customizable ophthalmic lens comprising a transparent set of electroactive cells () juxtaposed to a lens surface for providing an optical phase-shift distribution function. The method includes providing () a reference phase-shift distribution function adapted to provide a given dioptric function DF(&#x3b1;, &#x3b2;); determining () the actual gaze direction (&#x3b1;, &#x3b2;); choosing () a reference gaze direction (&#x3b1;, &#x3b2;); calculating () an actual point Pat the intersection between the actual gaze direction and the transparent set of electroactive cells, and a reference point Pat the intersection between the reference gaze direction and the transparent set of electroactive cells; calculating () a modified phase-shift distribution function by shifting the reference phase-shift distribution function according to a vector {right arrow over (PP)}; and activating () the electroactive cells according to the modified phase-shift distribution function.

Growing community of inventors

Charenton-le-Pont, France

Marius Peloux