Essilor International Patente

A hinge (1) for head-mountable device, which comprises a male hinge part (2) and a female hinge part (3) which are adapted to be coupled to each other, wherein the coupling between the male hinge part (2) and the female hinge part (3) is obtained by way of coupling means (6, 7), which are arranged at the axis of rotation of the hinge, the coupling means (6, 7) being implemented by control and command means (7) which are adapted to rotate around the axis of the hinge, sensor means (8) being integrated in the hinge, for the purpose of detecting a rotation of said control and command means (7), in order to convert such rotation to an electrical signal adapted to be sent to an electronic unit of the head-mountable devices.

System and computer-implemented method for detecting at least one defect in an optical article. The system is configured to obtain an image of the tested optical article, to input the image into a feature extraction machine learning model, the feature extraction machine learning model being configured to process the image and to output features; and, to input the features into a machine learning classifier, the machine learning classifier having been previously trained with sets of model features of respective model optical articles, the sets of the model features being labelled with an indication of a presence of at least one defect in the respective model optical articles, and the machine learning classifier being made to output an indication of the presence or absence of at least one defect.

System and computer-implemented method for detecting at least one defect in a tested optical article, the system being configured to obtain an image of the tested optical article, slice the image to obtain sub-images, a size of the sub-images being determined based on a size of at least one of expected defects, input the sub-images in a machine learning model, the machine learning model having been previously trained with model sub-images, the model sub-images being obtained by slicing of model images of model optical articles, the model-images being labelled with a location of at least one defect of the respective model optical articles, the model sub-images being labelled with the location of the at least one defect based on labels of the corresponding model image, the machine learning model being made to output an indication of the presence or absence of at least one defect.

The invention relates to a method for measuring at least one geometrico-morphological parameter of a subject (2) wearing an eyewear (3) in order to fit an ophthalmic lens in said eyewear. The method comprises the following steps:- placing the subject wearing the eyewear in a natural posture while looking at a visual symbol (17) among a plurality of visual symbols (9) on a visual target (6),- placing a double-sided image capture apparatus (5) between the subject and the visual target, with a first image capture device (10) facing the subject, a second image capture device (11) facing the visual target,- obtaining images of both the subject and visual target thanks to the double-sided image capture apparatus (5),- determining at least one first point (18) and at least one second point (19) from each of the images,- identifying the visual symbol,- determining the at least one geometrico-morphological parameter using the at least one first and second points and the identification of the visual symbol.The invention also relates to an associated system and a fitting method.

System for manufacturing an optical device (10), the system being configured for: - applying a hydrophobic coating over at least a central region (24) of a surface (12B, 14A) of a lens (12, 14), - machining a peripheral edge (20) of the lens (12, 14), - applying an adhesive (26) on a region (22) of the surface (12B, 14A) of the lens (12, 14) and/or on a corresponding region of the optical element (16), and fixing an optical element (16) to the lens (12, 14) with the adhesive (26).

System, head-mountable device and method for determining a value of a physiological parameter of an individual. The system comprises a head-mountable device intended to be worn by the individual. The head-mountable device comprises a first set of at least one sensor and a second set of at least one sensor. The at least one sensor of the first set comprises at least one LED and at least one photodiode. The at least one LED is arranged, so that light emitted by the at least one LED is reflected by the face of the individual and received by the at least one photodiode. Values outputted by the at least one sensor of the first set depend on an amount of the light received by the at least one photodiode. Values outputted by the at least one sensor of the second set depend on a distance between the face of the individual and the head-mountable device. The system is configured to determine the value of the physiological parameter of the individual based on values outputted by the at least one sensor of the first set and the values outputted by the at least one sensor of the second set.

A mold insert includes a base, a material of the base being a metal; a body disposed adjacent to the base along a first side of the body, a material of the body having a thermal conductivity between 0.05 and 5 W/m-K; and a working stamp disposed adjacent to the body along a second side of the body, the working stamp including a plurality of microstructures, wherein a thickness of the working stamp is 100 µm to 500 µm, and wherein the microstructures have a height or a depth, said height or depth being of 0.1 µm to 50 µm.

The present disclosure relates to a method for manufacturing an ophthalmic article, comprising: - positioning (S100) a wafer from a first mold part; - adhering (S200) a first adhesive tape to both the edge of the wafer and the edge of the first mold through a first adhesive surface thereby forming a first mold cavity and obtaining a partial mold assembly with an assembly edge; - positioning (S300) a second mold part relatively to the partial mold assembly; - adhering (S400) a second adhesive tape to both the assembly edge and the edge of the second mold through a second adhesive surface; thereby forming a second mold cavity and obtaining a full mold assembly; - filling (S600, S650) the first and second mold cavities with polymerizable materials; and - polymerizing (S700) the polymerizable materials.

Additive manufacturing system for producing an ophthalmic lens configured for:- depositing at least one layer of a first material on a substrate, the at least one layer having at least one first cavity,- curing the at least one layer of the first material to a first level of the curing,- placing the electronic device in the at least one first cavity,- depositing at least one layer of a second material on the at least one layer of the first material,- curing the at least one layer of the second material to a second level of the curing higher,- depositing at least one layer of a third material on the at least one layer of the second material,- curing the at least one layer of the third material to a third level of the curing.

A polymerizable composition for making thermosetting materials containing allylic monomers and/or oligomers and diisopropyl peroxydicarbonate (IPP) as an initiator, wherein the said composition comprises: • A UV absorber in an amount ranging from 0.1 to 2 % wt, • A phosphite based molecule in an amount ranging from 0.2% wt to 1% wt.

The present invention provides a composition suitable for use in switchable mirror devices, said composition comprising, dissolved in a solvent, a reducing compound E, a metal cation Mⁿ⁺, and an organic ligand L able to form a coordination complex with Mⁿ⁺, wherein E does not spontaneously reduce oxidized metal present in the composition, and wherein L comprises the following moiety I:Wherein X and X' are independently selected from O, and

This head mountable device (10) comprises an ophthalmic lens (120, 122) having a front wafer (120) and a back wafer (122), an optical system (14) comprising a projector including a light source, a light-guide optical element (16) illuminated by the optical system (14). The optical system (14) is attached to the light-guide optical element (16). The light-guide optical element (16) is bonded to the ophthalmic lens (120, 122) by means of a first adhesive material. The head mountable device (10) comprises, in addition to an ophthalmic portion intended for vision by a user, a first non-ophthalmic portion (18) covering the light-guide optical element (16) and extending between the external edge of the back wafer (122) and the external edge of the light-guide optical element (16), except in the area occupied by the optical system (14), the first non-ophthalmic portion (18) being coated with the first adhesive material.

The present invention relates to a method for manufacturing an ophthalmic article comprising a lens substrate and an ophthalmic wafer wherein the ophthalmic wafer has a blunt edge between a first surface thereof and its lateral surface; wherein the method comprises: providing (S100) the ophthalmic wafer; forming a mold cavity (S200); filling (S300) the mold cavity with a polymerizable composition; and curing (S400) the polymerizable composition to harden it, thus forming the lens substrate thereby obtaining the ophthalmic article. The present invention also relates to ophthalmic article (1) comprising: a lens substrate (12) and an ophthalmic wafer (11) with a first surface (111) in contact with the lens substrate (12), a second surface (112) opposite the first surface (111) and a lateral surface (113) joining the first surface (111) and the second surface (112), the ophthalmic wafer (11) having a blunt edge (113) between the first surface (111) and the lateral surface (112).

The present invention provides an electrochromic device that can be set in states S0, S1 and S2, wherein different sets of electrochromic moieties are activated, and wherein state S2 is a state where the cell has a reversed polarity compared to state S1, all within one electrochromic cell. A single cell is thus able to achieve at least three different colors.

The invention relates to an optical article comprising a surface-functionalized optical substrate and an optical element deposited on the same, an eyewear comprising this article, a method for functionalizing the substrate and a method of manufacturing this article.The optical substrate (5) is based on a first thermoset polymer and has a first outer surface, and the optical element (10) is based on a second thermoset polymer selected from (meth)acrylate based resins, has a second inner surface and is deposited on the optical substrate (5), the second inner surface being bonded to the first outer surface by covalent bonds at an interface thereof.According to the invention, the first outer surface is functionalized by functional groups comprising a product of a radical crosslinking reaction between the second thermoset polymer and a derivative of an organosilane compound which contains a vinyl or (meth)acrylate end group, and the derivative of the organosilane compound is a basic hydrolyzate thereof, the basic hydrolysate being grafted on the first outer surface to at least partially form said interface.

The present invention provides a switchable mirror device that may achieve three states SO, S1 and S2 with one single electrochemicaol cell, wherein the device has a lower transmission in state S1 than in state S0 without substantially increasing the reflectivity of the device, which means that the transition from S0 to S1 corresponds essentially to a change of color of the device without the device taking the appearance of a mirror to an outside viewer, and wherein in S2, a mirror layer is reversibly deposited, and the device will have a mirror appearance.

The present invention relates to an ophthalmic article (10) comprising: an ophthalmic wafer (11) with a first face (111), a second face (112) opposite the first face and microstructures(114), the microstructures being either on the first face or between the first face and the second face; an adhesion promotion layer (13) on the first face of the ophthalmic wafer; a lens substrate (12) in contact with the adhesion promotion layer; wherein the adhesion promotion layer comprises an adhesive promoter having at least one of the following functional groups: -NH2, -SH, -NCO and -OH. The present invention also relates to a method for manufacturing the ophthalmic article.

This head mountable device (10) comprises an ophthalmic lens having a front wafer (120) and a back wafer (122), an optical system (14) comprising a projector including a light source, a light-guide optical element (16) arranged between the front and back wafers (120, 122) and illuminated by the optical system (14). The optical system (14) is attached to the light-guide optical element (16). The light-guide optical element (16) is bonded to the ophthalmic lens by means of a first adhesive material. The head mountable device (10) comprises, in addition to an ophthalmic portion intended for vision by a user, a non-ophthalmic portion (18) not intended for vision covering the light-guide optical element (16) and extending between the external edge of the back wafer (122) and the external edge of the light-guide optical element (16), the non-ophthalmic portion (18) comprising a hole (20) adapted to accommodate the projector.

The disclosure provides a method for manufacturing a tinted ophthalmic device (5) having at least one curved face (14) thanks to at least one inkjet print head (6), the method comprising providing a manufacturing file comprising at least one image; wherein the at least one image is defined by a network of pixels representative of a distribution of tint material for inkjet printing a tint layer (17) on the at least one curved face of the ophthalmic device, and the at least one image is planar and determined as a function of at least curvature geometrical characteristics of the at least one curved face of the tinted ophthalmic device to manufacture.

The disclosure provides an optical device (2) configured to equip an augmented reality eyewear device (1), comprising a waveguide (4) having spaced apart reflective facets (10) arranged in series in a first direction (S1) and extending in a second direction (S2) that is transverse to the first direction, the waveguide having a front face (6) and a back face (5), further comprising a polarizer (7) facing the front face and having a polarization axis (P) orthogonal to said second direction, the optical device is configured so that light incoming from an external environment of the device and directed from the front face towards the back face has a same polarization state after passing through the polarizer and then the reflective facets, as well as after passing through the polarizer and then zones devoid of reflective facets. The disclosure also provides an augmented reality eyewear device comprising such optical device.

A manufacturing device for additively manufacturing an object, the object encapsulating a component, the manufacturing device being configured for placing the component in a volume of an optically reactive material, irradiating, for forming a part of the object, a part of the optically reactive material, the part of the optically reactive material being adjacent to the component, the irradiating being realized with a first light of a first wavelength and a second light of a second wavelength, wherein the irradiation of the part of the optically reactive material depends on a value of at least one characteristic of the component.

The present application relates to a method of manufacturing a polymeric cast substrate, the method comprising the steps of: - providing a casting mold assembly containing two unsealed mold parts each having an inside surface and an outside surface, the inside surface of at least one of the unsealed mold parts comprising a composition comprising a UV absorbing agent; - arranging the inside surfaces of the mold parts opposite to each other and closing the casting mold assembly so that the inside surfaces of both mold parts form together the molding cavity; - filling a polymerizable composition in the molding cavity; - curing the polymerizable composition in the mold assembly to obtain a polymeric cast substrate. The present application further relates to an optical article, preferably a lens, comprising a polymeric cast substrate manufactured according to this method, and also relates to an eyewear comprising such optical article.

System, eyewear and method for improving future visual performance or future cognitive performance of the individual. The system comprises a device for irradiating light toward an eye of the individual. The system is configured for: • determining, at a first time, first visual performance or first cognitive performance of the individual, • determining values of parameters of a first light to be irradiated toward an eye of the individual according to the first visual performance or the first cognitive performance of the individual, • irradiating, between the first time and a second time, the first light toward the eye of the individual, • determining, at the second time, second visual performance or second cognitive performance of the individual, • irradiating, after the second time, a second light toward the eye of the individual, when the second visual performance is better than the first visual performance or the second cognitive performance is better than the first cognitive performance, a light dose irradiated by the second light being greater than a light dose irradiated by the first light.

The disclosure relates to a tonometer arm comprising:- a plenum chamber body (110) having a fluid inlet (111) and a fluid outlet (112),- an inlet pipe connected to the fluid inlet and adapted to supply a fluid in the plenum chamber body along an inlet axis,- an outlet pipe (130) connected to the fluid outlet and adapted to eject the fluid outside of the plenum chamber body along an outlet axis (A2) tilted relative to the inlet axis,wherein the plenum chamber body comprises at least one inner wall (114, 115) extending substantially radially with respect to the outlet axis.

The disclosure relates to an apparatus (10) for determining a value of at least one characteristic of an eye of an individual (200), comprising: - a housing (22), - a individual's head support (25), - a tonometer arm (100) configured to determine the value of the at least one characteristic, and movable relative to the housing between a position of use and a retracted position distinct from the position of use, and wherein the housing comprises positioning means suitable to determine the position of the individual's eye relative to the housing when the individual's head rests on the individual's head support, whether the tonometer arm is in retracted position or in position of use.

The disclosure provides a method for additively manufacturing an ophthalmic device thanks to at least one inkjet print head (6) having a plurality of nozzles (15), comprising providing a manufacturing file comprising parameters including a plurality of images, each image being representative of distribution of voxels or droplets for inkjet printing at least partially a layer of the ophthalmic device and each image being used for activating and deactivating nozzles of the at least one inkjet print head, wherein for at least some images, some nozzles of the at least one inkjet print head are selected depending on determined deviation characteristics of the nozzles of the at least one inkjet print head, the selected nozzles being representative of a group of adjacent nozzles located in an inkjet printing window.

A method for manufacturing an optical article for controlling eye-length related disorders with light filtering functions comprising the steps of: - providing (50) a mold (70) comprising a shaped portion (70a) having a concave micro-structured surface and a smooth portion (70b) having a smooth surface defining a cavity (73); - inserting (52) a light filtering wafer (72) against the concave micro-structured surface (70a); - injecting (56) an optical thermoplastic material (74) into the cavity (73) of the mold (70) via a filler (76), against a back surface of the light filtering wafer (72); - applying a packing pressure via the filler (76) to force more optical thermoplastic material (74) into the mold (70) to compensate for a shrinkage of the optical thermoplastic material (74) during cooling; - opening (58) the mold (70) after the optical thermoplastic material (74) is solidified, thus obtaining an optical article (78) having microstructures (80) on a front surface of the light filtering wafer (72).

The present invention discloses a device comprising an electrochromic cell comprising an electrochromic formulation, wherein the electrochromic formulation comprises: - A solvent, - An ionic electrochromic compound CO dissolved in the electrochromic formulation, and - A lithium salt dissolved or dispersed in the electrochromic formulation. said device further comprising means to apply electric energy to the electrochromic cell, said means being configured to be able to maintain the electrochromic cell in at least two states SO and S1, wherein: - In SO, no electric energy is applied to the electrochromic cell, - In SI, at least part of compound CO present in state SO is excited into a compound CO*, wherein CO and CO* do not have the same color.

A system comprises a head-mountable device (10) and at least one sensing unit (14). The at least one sensing unit (14) is configured for obtaining a value of at least one feature of a motion of a head of a wearer, and a data processing unit (15) of the head-mountable device (10) is configured for determining a characterization of a gaze distance of the wearer from at least the value of the at least one feature of the motion. In preferred embodiments, the sensing unit may be an inertial measurement unit, and the data processing unit may be of neuron network type, in particular of multilayer perceptron type.

System and computer implemented method for determining updated values of manufacturing parameters to reduce defects in manufactured items. The system is configured for receiving descriptions of the defects, the descriptions being provided in a natural language, converting the descriptions into inputs suitable for a deterministic problem-solving module and feeding the inputs in the deterministic problem-solving module to obtain the updated values of the manufacturing parameters.

The invention relates to a method for providing a predefined pattern in an electro-activable optical article, the method comprises: - providing an electro-activable optical article comprising an electro-activable element, said electro-activable element comprising an electro-activable layer between two electroconductive layers, - providing a predefined pattern in the electro-activable optical article by marking at least one of the two electroconductive layers using a laser source.

The invention relates to an eyewear (1) comprising: - an ophthalmic lens (20) having an adjustable optical power, the ophthalmic lens being placed in front of an eye of the user for improving the vision of the user; - a first sensor (30) adapted to acquire a first signal representative of a temporal variation of an optical power of the eye; - a second sensor (40) adapted to acquire, synchronously with acquiring the first signal, a second signal representative of a temporal variation of an accommodation capacity of the eye; - a control unit (50) programmed to: i) determine a first direction of change of the first signal at a given moment and a second direction of change of the second signal at said given moment; ii) modify or maintain unchanged, based on the first direction of change and the second direction of change at said given moment, the adjustable optical power of the ophthalmic lens.

The invention relates to a method for making a polymerizable composition to produce an anti-abrasion hard coat which does not comprise adding organic solvent, the method consisting of (a) Stoichiometrically hydrolysing a tetraalkoxysilane compound bearing hydrolysable groups with HCl solution having a concentration between 0.025 to 0.05N to obtain a first composition; (b)Adding an epoxysilane monomer to the first composition; (c)Stirring the composition resulting from step (b); (d)Adding an excess amount of DI water for hydrolysing said epoxysilane, and lowering the HCl concentration under 0.025 mol.L^-1; (e)Adding a polymer catalyst under stirring.

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