The invention relates to a method (P) for generating, by an integrator (I), an encrypted binary executable file involving compiling software libraries using a development library from an SDK. The libraries, provided by providers (V), are intended for an embedded digital signal processor. The method comprises: determining a group encryption key and sharing it between the integrator and the providers. Each provider determines a specific secret and encrypts its libraries with a symmetric algorithm using this secret and the group key. The development library compiles the encrypted libraries after retrieving the providers' secrets. The binary executable file is then encrypted with the symmetric algorithm using the group key and a final secret derived from the providers' secrets.
H04L 9/06 - Arrangements for secret or secure communicationsNetwork security protocols the encryption apparatus using shift registers or memories for blockwise coding, e.g. D.E.S. systems
Disclosed is a retainer (10) for processing an optical workpiece. The retainer comprises a holding arrangement (72) and a support assembly (73) for the workpiece. A rubber-elastic membrane (75) mounted on a housing (74) has a retaining section (76), on the outer side (77) of which one surface of the workpiece can be placed to lie flat. The membrane, together with the housing defines a chamber (78) in which a plurality of separately longitudinally movable pins (79) of the support assembly are retained. A pin end (80) of each pin can be brought to bear against an inner side (81) of the retaining portion of the membrane and can be fixed relative to one another by a clamping mechanism (82) against longitudinal movement with respect to the housing. The holding arrangement for the workpiece is provided in or on the retaining section of the membrane.
A method for determining parameters of an image acquisition module of an electronic device, the electronic device having a display screen and the image acquisition module on the same side of the electronic device. The method includes an initialization step where a first pattern is displayed on the display screen, a positioning step where the electronic device is positioned in front of a mirror, an orientation step where the electronic device is oriented in a particular orientation, an orientation confirmation step where the electronic device is maintained in the particular orientation during a period of time, a reference point determination step where the set of fourth elements of the second pattern are detected and a reference point associated to each fourth element is determined, and an image acquisition module parameter determination step where the image acquisition module parameter is determined.
A lens element worn in front of an eye of a person 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 optical elements, wherein the optical elements are configured so that along at least one section of the lens the mean sphere of optical elements increases from a point of the section towards the peripheral part of the section.
An ophthalmic lens and a method of manufacturing the ophthalmic lens, the ophthalmic lens including a base lens that includes at least a layer of low-birefringence material and at least one holographic component recorded on a surface of the layer of low-birefringence material, and an auxiliary lens assembled to the base lens.
This device (12) for manipulating at least one ophthalmic lens (10) comprises a translational and rotational motion unit, movable in translation and in rotation according to three mutually orthogonal directions and a chuck (14) fixed on the translational and rotational motion unit. The chuck (14) comprises: a plurality of holders (16) movable in translation according to a direction orthogonal to a face of the at least one ophthalmic lens (10), at least one holder of the plurality of holders (16) being provided with a vacuum propagating element enabling that holder to grip the face of the at least one ophthalmic lens (10); and a plurality of holder control elements (18), each holder control element (18) being adapted to either impede, or allow translation movement of a holder of the plurality of holders (16).
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B23Q 7/04 - Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of grippers
B25J 15/06 - Gripping heads with vacuum or magnetic holding means
B24B 13/005 - Blocking means, chucks or the likeAlignment devices
B65G 47/91 - Devices for picking-up and depositing articles or materials incorporating pneumatic, e.g. suction, grippers
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
B24B 41/06 - Work supports, e.g. adjustable steadies
This thermoforming machine includes a thermoforming chamber having at least one heated air inlet through which heated air flows into the thermoforming chamber at a controlled pressure. The air inlet cooperates with a heated air flow distribution regulator located in the thermoforming chamber and through which the heated air flows out of the thermoforming chamber at a predetermined temperature. The regulator includes a heated air flow regulating mask receiving heated air flow, having a plurality of flow restricting elements providing different air flow restrictions.
The disclosure relates to a system for obtaining an image quality parameter of an eyepiece suitable for being disposed in an augmented and/or virtual reality head mountable device, the eyepiece comprising at least one non-plano lens and one pattern generating module, the system comprising an image capture system (ICS) designed to acquire images within a specific angular range which is smaller than the total field of view of the eyewear, the ICS comprising a variable focus control unit (VFCU), each image showing a specific pattern generated by the pattern generating module and transmitted by the lens, the system being configured to utilize the ICS to acquire the images from varied orientations simulating eye movements of a user while operating the VFCU to maintain, for each image, sharpness of the specific pattern showed on said image across at least one predetermined orientation, and the system being configured to obtain at least one image quality parameter determined from the acquired images, where the parameter is indicative of a quality of images as perceived through the eyepiece.
The present invention relates to a method of fast curing a polythiourethane based transparent substrate, comprising in one of its embodiments providing a first component (A) comprising a polythiourethane pre-polymer (A1) having isocyanate or isothiocyanate end groups, providing a second component (B) comprising a polythiourethane pre-polymer (B1) having thiol end groups, mixing together first and second components (A) and (B) to form a polymerizable mixture, curing said mixture to obtain a transparent substrate, wherein at least one photo-activatable latent catalyst composed of a quaternary ammonium or quaternary iminium cation and a borate anion is added in the process prior to the curing step, and said latent catalyst is subsequently photo- activated to carry out a polymerization reaction forming the polythiourethane-based transparent substrate.
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
C08G 18/18 - Catalysts containing secondary or tertiary amines or salts thereof
11.
DEVICE AND PROCESS FOR MANUFACTURING AN OPTICAL LENS WITH LIQUID MOLDS
The invention relates to a device (10) for manufacturing an optical lens, comprising: - a tank (100) defining internally a chamber (101) suitable for being filled with a liquid, - a ring (150) that defines internally a formation volume (151) suitable for receiving a material of formation of the optical lens, and that is held into said tank, and - a compartment divider (140) surrounding said ring and dividing said chamber into an upper subdivision and a lower subdivision.
A method for annealing a lens made of plastic material is disclosed, as well as a method for manufacturing a lens made of plastic comprising said method for annealing, wherein said method for annealing is conducted on a lens obtained by casting or injection molding of a plastic material, prior to conducting the lens finishing steps, such as surfacing, among others.
G02F 1/1523 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material comprising inorganic material
An optical lens intended to be worn in front of an eye of a wearer to correct a vision impairment and to slow down the progression of said vision impairment, the optical lens comprising a pattern of microstructures, wherein over a pupil area having a diameter equal to or greater than 4.0 mm and including at least part of the microstructures, the optical lens produces a first optical path difference map (OPD1), wherein over said pupil area, the pattern of microstructures produces constant phase shifting so that the differential optical path map (DOP), being the difference between said first optical path difference map (OPD1) and a second smooth optical path difference map (OPD2), is a piecewise constant of at least two levels, characterized in that over said pupil area, an image quality (Q1) measured at a first wavelength (λ1) is at least 10% lower than a retinal image quality (Q2) measured at a second wavelength (λ2).
The disclosure relates to a for adapting thickness of an initial lens based on peripheral thickness or width determined constraint Said determined constraint enable to determine a target zone of the initial lens to be modified. Said lens being modified over the targeted zone so as to fulfill the peripheral determined constraint.
The present invention relates to a method of fast curing a polythiourethane based transparent substrate, comprising in one of its embodiments providing a first component A comprising a polythiourethane pre-polymer A1 having isocyanate or isothiocyanate end groups, providing a second component B comprising a polythiourethane pre-polymer B1 having thiol end groups, mixing together first and second components A and B to form a polymerizable mixture, curing said mixture to obtain a transparent substrate, wherein at least one heat-activatable latent catalyst composed of a tertiary ammonium or tertiary iminium cation and a borate anion is added in the process prior to the curing step, and said latent catalyst is subsequently activated to accelerate the polymerization reaction forming the polythiourethane-based transparent substrate.
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
17.
DEVICE AND METHOD FOR DETERMINING A SHIFT IN A REFRACTION VALUE OF AN EYE OF A SUBJECT INDUCED BY AN OPTICAL FILTER
A device for determining a shift in a refraction value of an eye lighted by a light beam emitted by a light source and transmitted through an optical filter, wherein the device includes a memory storing a value of an initial spectral feature of the light source, a value of an optical feature of the optical filter, and a refraction shift model linking a magnitude associated with the shift and a spectral feature of the light beam. Further, the device includes processors programmed to determine a value of a spectral feature of the light beam based on the value of the initial spectral feature of the light source and the value of the optical feature of said optical filter; and determine the shift based on the refraction shift model and the value of the spectral feature of the light beam.
A61B 3/103 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
A61B 3/00 - Apparatus for testing the eyesInstruments for examining the eyes
18.
A METHOD FOR SURFACING A LENS BLANK WITH A CUTTING TOOL
A method for surfacing a lens blank with a cutting tool A computer-implemented method for determining a compensated surface description data intended to be loaded into a surfacing machine to obtain a surface of an optical element by cutting a blank with a cutting tool of the surfacing machine, the method comprising:—providing a surface description data,—providing contact data from the surface description data,—generating a compensation map by using a transfer function,—determining a compensated surface description data from the generated compensation map and the surface description data.
G05B 19/18 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
19.
ACTIVE OPTICAL SYSTEM FOR AN OPHTHALMIC SPECTACLE LENS OR FOR AN AUGMENTED REALITY DEVICE AND METHOD FOR ADJUSTING OPTICAL POWER THEREOF
The invention concerns an active optical system (100) for an ophthalmic spectacle lens or for an augmented reality device. According to the invention, the active optical system (100) comprises a base lens (10) and a stacked structure, the stacked structure comprising at least one active diffractive phase lens (20) having a variable optical power with a minimum optical power variation of at least 0.25 diopter, the stacked structure having a variable total optical power, said active diffractive phase lens presenting in cross-section a plurality of discrete phase levels (21, 22, 23, 24) and activation means (30) for varying the variable optical power of said at least one active diffractive phase lens, the variable total optical power of the stacked structure varying continuously over a determined optical power range or having at least three different values in the determined optical power range, said stacked structure having a total thickness lower than 1 mm.
The disclosure provides a method for additively manufacturing an ophthalmic device delimited by an external surface, comprising inkjet printing (102) at least one first core layer having at least one first predetermined thickness, inkjet printing (103) at least one second core layer at least partially onto the at least one first core layer and having at least one second predetermined thickness equal or different to the first predetermined thickness, inkjet printing (104) at least one edge layer onto the at least one first core layer and adjacent to the at least one second core layer, the at least one edge layer defining at least partially the external surface of the ophthalmic device and having at least one third predetermined thickness lower than or equal to the at least one second predetermined thickness.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 64/112 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
B29C 64/194 - Processes of additive manufacturing involving additional operations performed on the added layers, e.g. smoothing, grinding or thickness control during lay-up
Method for determining values of parameters of an optical system. The optical system comprises a front optical element, a back optical element and a wave guide. The back optical element being intended to be positioned closer to an eye of a wearer of the optical system than the front optical element. The wave guide is between the front optical element and the back optical element. The wave guide has an exit surface being arranged to output an image to the wearer. The method comprises selecting the front optical element among a set comprising a maximum of 6 pre-established front optical elements, determining values of parameters of the back optical element based on an intended power map of the optical system and the selected front optical element. The intended power map is a progressive power map.
The optical system comprises a front optical element, a back optical element and a wave guide. The back optical element is intended to be positioned closer to an eye of a wearer of the optical system than the front optical element. The wave guide is between the front optical element and the back optical element. The wave guide has an exit surface being arranged to output an image to the wearer. The method comprises determining values of parameters of a first part of the front optical element corresponding to the near vision part of the optical system and values of parameters of a second part of the front optical element corresponding to a far vision part of the optical system based on an intended power map of the optical system.
Method for defining an optical lens design of a pair of eyeglasses intended to be worn by a subject, said method comprising at least one iteration of the following steps: a) providing a pair of eyeglasses intended to be worn by the subject, said pair of eyeglasses comprising a first lens intended to be worn in front a first eye of the subject and a second lens intended to be worn in front of a second eye of the subject, each lens of the pair of eyeglasses comprising: i) a refraction area based on a prescribed refractive power, and ii) an arrangement of micro-optical elements, b) after a period of time, collecting data relating to the visual behavior and/or the environment of the subject and determining a value of a myopia progression indicator for at least one eye of the subject. c) defining the optical lens design of the pair of eyeglasses based on the collected data and the value of the myopia progression indicator.
A61B 3/028 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuitySubjective types, i.e. testing apparatus requiring the active assistance of the patient for determination of refraction, e.g. phoropters
A61B 3/103 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
A61B 3/113 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining or recording eye movement
A61B 3/14 - Arrangements specially adapted for eye photography
A61B 3/00 - Apparatus for testing the eyesInstruments for examining the eyes
24.
OPHTHALMIC LENS WITH MODIFIED PERIPHERAL CURVATURE VARIATION
It is proposed a lens intended to be worn in front of or on an eye of a wearer and to provide a first refractive power (Rx) for correcting an abnormal refraction of the eye of the wearer; wherein the lens comprises a refractive area configured to provide the first refractive power (Rx) and a functional area configured to provide an optical function; and wherein on a first zone defined on the lens, more than 5% of the surface of said first zone has a local refractive power ranging from the first refractive power (Rx) minus 0.25 diopter and the first refractive power (Rx) plus 0.25 diopter, and more than 25% of the surface of said first zone covers the functional area.
A computer implemented method for measuring at least one fitting parameter of a spectacle frame on a wearer. The method includes obtaining at least one picture of the wearer wearing the spectacle frame, and determining at least an outline of the spectacle frame, so as to derive from the outline at least one fitting parameter of the spectacle frame on the wearer, the outline determination being implemented by artificial intelligence.
An optical article comprising at least: a base element having a front main surface and a rear main surface, and at least one interferential multilayered coating deposited onto the front main surface and/or the rear main surface of said substrate and comprising at least one layer having a low refractive index which is lower than 1.55, defined as “LI layer”, and at least one layer having a high refractive index which is equal to or higher than 1.55, defined as “HI layer”, the refractive indexes being expressed at 25° C. at a wavelength of 550 nm, wherein said interferential multilayered coating comprises an outermost sheet exhibiting a refractive index gradient which gradually decreases in the direction moving away from the base element and having a maximum value of refractive index lower than or equal to 1.55, and said interferential multilayered coating has preferably improved colorimetric characteristics.
A computing device that includes an interface module configured to transmit and receive signals between a local neural network and a global neural network. The local neural network, implemented by the computing device, is configured to process and analyze in-shop data related to wearers or prospective wearers of head-worn devices for predictive and personalized service provision, and the interface module enables participation of the local neural network in a federated learning process with the global neural network through the transmitted and received signals.
Disclosed is a method for the manufacturing of an optical element having a refractive index above 1.59 by additive manufacturing to the optical element obtained by such a method and to an ophthalmic lens including such an optical element.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 64/112 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
Wearable device and method for detection of mouth movements This wearable device (1) worn by a user for detection of mouth movements of said user, wherein said wearable device (1) comprises: at least one sensor (2) disposed in an auricular and/or temporoparietal region of a head of said user, said at least one sensor (2) being configured to monitor mouth movements of said user, so as to obtain signal data; a processing unit, configured to analyze said signal data and to extract at least one parameter representative of said mouth movements
The invention concerns an optical electrochromic device comprising: - an electrochromic cell (1), - a frame (2) with a groove (21), said device being characterized in that it further comprises: - at least one elastic sealing part (3) arranged in said groove (21), and said electrochromic cell (1) is arranged in said frame (2) and is compressed by said at least one elastic sealing part (3).
An ink composition for stamp-marking on an ophthalmic lens, said composition comprising at least: - a compound of formula (I), (I) wherein n is 1 or 2, - a drying aid, and - at least one pigment.
C07D 403/12 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a chain containing hetero atoms as chain links
C07C 211/00 - Compounds containing amino groups bound to a carbon skeleton
C07D 403/14 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
A lens element intended to be worn in front of an eye of a person including a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of said eye of the person and a second refractive power different from the first refractive power, a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.
A process for manufacturing an ophthalmic or semi-finished lens (20) using injection-molding comprises implementing a receiver (2A) that is provided with a bevel sized for avoiding that the lens sticks to said receiver when removing said lens from a cavity assembly (10). An invention improvement further proposes modifying a location in the cavity assembly of a temperature sensor which is used for controlling a temperature time-profile implemented in the injection-molding process. The invention process provides increased production yield, including for lenses which integrate functionalizing wafers or lids (21), such as polarizing lenses or spectrally filtering lenses.
B29C 45/78 - Measuring, controlling or regulating of temperature
B29C 45/56 - Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
B29C 43/36 - Moulds for making articles of definite length, i.e. discrete articles
A calculation module for determining a localization, system, eyewear and computer implemented method. The calculation module is configured to receive, from a spectrophotometer of an optical device, data representing a power density of at least two spectral components of a light received by the spectrophotometer and to determine the localization using the power density of the at least two spectral components.
A system that includes an optical device intended to be worn by a user and a calculation module. The optical device includes a light sensor, the light sensor being located in an internal side of the optical device and in a vicinity of a front part of the optical device, the light sensor being configured to determine an amount of light that it receives, and the calculation module being configured to determine an amount of backlight received by the optical device using the amount of light received by the light sensor.
Device, head-mountable device and eyewear intended to be worn by a user. The device is configured for determining if the user is wearing the device. The device is configured to obtain a signal representing vibrations produced by the user, to determine, in a predetermined frequency range, a power spectrum of the signal, to determine, based on the power spectrum, if the user is wearing the device. The predetermined frequency range is from 8 Hz to 12 Hz.
A system and a method for controlling a module of an optical device intended to be used by a user. The system includes the optical device and a controller, and includes a first sensor, a second sensor, and a module. The controller is configured to determine a situation of the user, using a model and first data received from the first sensor and to determine a confidence level associated with the situation. When the confidence level is below a threshold, the controller is also configured to activate the second sensor and to update the situation using second data received from the second sensor. The controller is also configured to control the module according to the situation.
A method of forming an ophthalmic laminate lens, includes: forming a planar laminate by adhering a first polycarbonate layer to a first side of a thermoplastic elastomer layer, and adhering a second polycarbonate layer to a second side of the thermoplastic elastomer layer, the first polycarbonate layer having a thickness greater than 250 μm, the second polycarbonate layer having a thickness greater than 250 μm, and the thermoplastic elastomer layer having a thickness in a range of 15 μm to 150 μm; thermoforming the planar laminate into a curved laminate, the curve laminate having a pre-molding curvature; arranging the curved laminate in a mold; and molding, via the mold set at a predetermined temperature and a predetermined pressure, the curved laminate with a polymer melt into a curved lens.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29K 69/00 - Use of polycarbonates as moulding material
B29K 75/00 - Use of polyureas or polyurethanes as moulding material
B32B 25/08 - Layered products essentially comprising natural or synthetic rubber comprising rubber as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
40.
ADDITIVE MANUFACTURING SYSTEM AND METHOD FOR ADDITIVELY MANUFACTURING AN OBJECT
An additive manufacturing system (100) and a method for additively manufacturing an object. The additive manufacturing system comprises a build platform (101). A surface (101-a) of the build platform is configured to support an object being manufactured. The additive manufacturing system also comprises a manufacturing module (102) configured to create layers of the object. The surface of the build platform is impermeable, and the additive manufacturing system is configured to move a point of a surface of the build platform independently of other points of the surface during the manufacturing of the object.
Calculation module comprising a memory and a processor. The calculation module is configured to select an adapted semi-finished lens blank among a plurality of semi-finished lens blanks for manufacturing an ophthalmic lens to be mounted in a frame of an eyewear. The eyewear is intended to be worn by a user. The calculation module is configured to determine a geometrical parameter value of the ophthalmic lens to be manufactured from a test semi-finished lens blank of the plurality, the geometrical parameter value of the ophthalmic lens depending on a base-curve of the test semi-finished lens blank, a refractive index of the test semi-finished lens blank, a prescription of the user and/or a characteristic parameter value of the frame. The calculation module is configured to select the adapted semi-finished lens blank based on the geometrical parameter value of the ophthalmic lens.
The invention relates to a plastic waste collection apparatus (15) configured to cooperate with a lens manufacturing station (1), the lens manufacturing station (1) being configured to shape a lens (3) by mechanical material removal like machining, grinding and/or trimming, and comprises an interface (9) to receive data information relative to a lens manufacturing job related to lenses to be shaped by the lens (3) manufacturing station (1), said data information comprising for each lens (3) manufacturing job at least a material type parameter of a lens to be shaped, the plastic waste collection apparatus (15) comprising - at least a first collection area (17A) for collecting plastic waste according to a first material type parameter, - at least a second collection area (17B) for collecting plastic waste according to a second material type parameter, - a dispatching unit (31) configured to receive said material type parameter for each lens manufacturing job and to dispatch the waste generated towards the first or the second collection area (17A, 17B) depending on the received material type parameter.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B24B 13/00 - Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other workAccessories therefor
B24B 55/12 - Devices for exhausting mist of oil or coolantDevices for collecting or recovering materials resulting from grinding or polishing, e.g. of precious metals, precious stones, diamonds or the like
B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics
B29B 17/02 - Separating plastics from other materials
B29L 11/00 - Optical elements, e.g. lenses, prisms
43.
ANTICIPATION OF THE CHANGE IN LENS PHYSICAL DIMENSIONS AND FUNCTIONALITY DURING ITS MANUFACTURING PROCESS
A method for providing a lens element having a targeted optical design and comprising a plurality of optical microstructures encapsulated within at least two sub-lens elements, the method comprising: obtaining lens element data comprising at least one theorical parameter related to the optical design of the lens element to be provided, obtaining manufacturing process data relating at least to a step of a process for manufacturing the lens element having a target optical design, obtaining transfer law data comprising at least data relating to a modification of the theorical parameter associated with the process for manufacturing the lens element and compensations to apply to an optical design to compensate said parameter modification, based on the manufacturing process data, optimizing the lens element data by modifying a parameter defining the optical design of the lens element to be provided, based on the transfer law data, manufacturing the lens element based on the optimized lens element data
Method for characterizing at least part of a lens element, for example a myopia control lens element, adapted for a wearer, said lens element providing a first optical function having a refractive power based on the prescription of the wearer, and comprising a plurality of optical elements, each optical element of the plurality of optical elements providing one or more optical functions, at least one of which is different from the first optical function; wherein the method comprises: - obtaining a two-dimensional representation of the local optical power of at least part of the lens element using a deflectometry method or fringe projection profilometry, - determining the optical power distribution over at least part of the two-dimensional representation of the lens element in the form of a representation of the data as a histogram or a stem-and-leaf plot; and - characterizing at least the part of the lens element within said at least part of the two-dimensional representation of the lens element by analyzing the representation of the data, for example characterizing the histogram or stem-and-leaf plot.
G01B 11/25 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. moiré fringes, on the object
The disclosure provides a method for manufacturing by machining an ophthalmic device, comprising: providing (101) data representative of at least one desired surface to be machined on the ophthalmic device, at least as a function of an optical power; providing (102) at least one parameter representative of a wear state of at least one location of an edge of a cutting tool configured to machine the at least one desired surface of the ophthalmic device; determining (103)a machining strategy as a function of both the at least one desired surface and the at least one parameter representative of the wear state; the machining strategy being selected between at least one of a first order (103a) to machine the desired surface with the cutting tool and a second order (103b) not to machine the desired surface with the cutting tool.
G05B 19/404 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
B24B 9/14 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
46.
DEVICES AND METHOD FOR FAVOURING A VISUAL SYSTEM CAPACITY IN FUNCTION OF EXTERNAL CONDITIONS
A visual system capacity of a wearer of an smart eyewear including at least one functionality is favoured, by receiving distance data (30) on one or more distances between a part of the smart eyewear and one or more material surfaces located in one or more directions from the wearer, determining from the distance data, actuation data (50) adapted to set one or more parameters of the functionalities so as to favour the visual system capacity of the wearer, and 0 providing the actuation data for those parameters to be set A type (33) of a current environment of the wearer is derived from the distance data and the actuation data are determined from that environment type. Applications to automatic setting of smart smart eyewear functions, notably to echromic smart eyewear.
Set comprising a physical vapor deposition machine and an obstruction device. The physical vapor deposition machine comprises a vacuum container, an ion beam gun and a support member. The support member comprises at least one hole, the at least one hole is intended to receive a substrate, a shape of the substrate has sensibly a shape of the at least one hole. The ion beam gun is configured to generate an ion beam toward the support member. The obstruction device is configured to obstruct a gap between the at least one hole and the substrate when the substrate is placed in the at least one hole and the obstruction device is placed on the substrate.
The invention relates to a method for manufacturing a spectacle lens including a base portion and a plurality of solid optical elements (20) that have refraction properties distinct from those of the base portion and that are embedded in the base portion, comprising:—a step of providing said solid optical elements and a first part (11) of said base portion,—a step of arranging said solid optical elements (20) on the inner face of a first part of said base portion, and—a step of manufacturing a second part of said base portion onto said inner face and said solid optical elements to obtain said spectacle lens.
Computer-implemented method, device and system, for determining a similarity score between a reference eyeglasses frame and a plurality of model eyeglasses frames. The method comprises a step of generating a picture using values of a first subset of physical parameters of the reference eyeglasses frame, a step of selecting at least one of the model eyeglasses frames, based on values of a second subset of the physical parameters and by comparison of the values of the second subset of the physical parameters of the reference eyeglasses frame with the values of the second subset of the physical parameters of each of the model eyeglasses frames and a step of determining a similarity score for each of the selected model eyeglasses frames, using a convolutional neural network, by comparing the picture of the eyeglasses frame with a picture of the selected model eyeglasses frames.
The invention relates to a method for manufacturing an optical article (30), comprising steps: S1) of providing at least two distinct parts (10), each one having two end faces (11, 12), S2) of assembling said at least two parts so that their end faces (11, 12) form main faces (21, 22) for the assembling (20) of parts, and S3) of machining at least one of said main faces to generate at least one optical face for the optical article.
Disclosed herein is an injection molding method for making optical thermoplastic lenses using 3D-printed functional wafers. The method employs a variable injection molding cavity temperature that is heated to at least wafer Tg−10° C.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
B29L 11/00 - Optical elements, e.g. lenses, prisms
B33Y 80/00 - Products made by additive manufacturing
52.
METHOD FOR MANUFACTURING AN OPHTHALMIC DEVICE HAVING AN OPTICAL FUNCTION INCLUDING AN ADDITION VALUE, AND SET OF OPHTHALMIC DEVICES HAVING DIFFERENT OPTICAL FUNCTIONS
The disclosure relates to a method for manufacturing an ophthalmic device having an optical function including at least an addition value, comprising: providing (101) a substrate having a first predetermined addition value on a first face, and determining (102) locations of positioning markings amongst the first face and a second face opposite to the first face, depending at least on the first predetermined addition value on the first face of the provided substrate and the addition value to bring to the ophthalmic device.
An optical device that includes an active programmable lens including a first zone configured to provide to a wearer, in standard wearing conditions, a correction of at least one eye based on a prescription, according to a first adjustable dioptric function. The optical device provides first vision distance data corresponding to a first distance between a first object in the environment of the wearer and the active programmable lens, stores vision distance data and at least two predetermined optical power states, each predetermined optical power state corresponding to an optical power value relative to a range of vision distance, and controls the first adjustable dioptric function of the first zone of the active programmable lens by adjusting the first adjustable dioptric function of the first zone of the active programmable lens according to an optical power state based on the provided first vision distance data.
G02C 7/08 - Auxiliary lensesArrangements for varying focal length
54.
SYSTEM COMPRISING A HEAD-WORN DEVICE AND A HAND-HELD DEVICE AND CONFIGURED TO DETECT A USE OF THE HAND-HELD DEVICE BY A USER WEARING THE HEAD-WORN DEVICE
A system and computer-implemented method for detecting a use of a hand-held device by a user wearing a head-worn device, the system comprises a head-worn device and a hand-held device. The system is configured to detect a use of the hand-held device by a user wearing the head-worn device. The system is also configured to determine a relative motion of one among the head-worn device and the hand-held device with respect to another among the head-worn device and the hand-held device and to detect, based on the relative motion, the use of the hand-held device by the user.
The invention relates to ophthalmic set for myopia progression control of a user, which comprises: - spectral filtering means being configured to selectively emit light in at least one selected range of wavelengths within the visible spectrum of 600 nm to 750 nm when excited by ambient light, allowing retinal exposure of the user myopic eye to said at least one selected range of wavelengths of light, whereby the spectral filtering means are efficient for slowing-down a myopia progression of the user; - wavefront modifying means adapted to modify wavefronts of the light that enters the user eye for slowing down the myopia progression of the user eye.
A lens element intended to be worn in front of an eye of a wearer having 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.
A method manufacturing an optical article, the method comprising: - providing a base substrate (10) comprising at least one optical surface (12a) and placing the base substrate (10) in a printing assembly (20), - providing a pattern (24, 26) to be printed on the base substrate (10) and determining a printing dot diameter for printing the pattern, - determining (200) a desired surface amount of primer to be deposited, based on the determined printing dot diameter, - depositing (300) a primer layer (30) by depositing a primer with the determined desired surface amount on at least part of the at least one optical surface (12a), - printing the pattern (24, 26) over the primer layer (30) with at least one inkjet printing head (22) depositing at least one dye (34), - placing the base substrate (10) in a heating assembly (40) for a predetermined migration duration, and - removing the primer layer (30).
A method for manufacturing an optical article, the method comprising: - providing (100) two base substrates (10), each base substrate (10) comprising two opposite optical surfaces (12a, 12b) and placing the base substrates (10) in a printing assembly (20), - providing a pattern to be printed on each base substrate (10) through inkjet printing, - determining (200) a preferred path for a printing head (22) to print the pattern on each base substrate (10), taking into account each optical surface (12a, 12b) of each base substrate (10), the preferred path minimizing a parameter representative of a distance measured from the printing head (22) to the optical surface (12a, 12b) being imprinted, - printing (600) the pattern with at least one inkjet printing head (22) depositing at least one dye, the printing head (22) following the preferred path, and - placing (800) each base substrate (10) in a heating assembly (40) for a predetermined duration.
The present application relates to a method of fast curing transparent casted substrate, usable for making optical articles such as ophthalmic lenses, which comprises the steps of:—providing a fast room-temperature polymerizable composition:—providing a catalyst composition;—providing a casting mold assembly containing two unsealed molds each having an inside surface and an outside surface; and optionally providing a light filtering element placed or configured to be placed between the two molds—depositing the catalyst composition:—on the inside surfaces of at least one of the molds; and/or—on at least one of the surfaces of the light filtering element which is thereafter positioned in the mold assembly;—closing the casting mold assembly so that the inside surfaces of the molds form together the molding cavity:—filling the fast room-temperature polymerizable composition in the molding cavity of the casting mold assembly already containing the catalyst composition deposited on the inside surface of at least one of the molds:—curing the filled mold assembly to obtain a transparent solid substrate, said curing step comprising: a) a first step for polymerizing said composition at room temperature to obtain a gel; and b) a second step of post-curing the gel to obtain the transparent solid substrate; and—recovering the transparent solid substrate from the casting mold assembly.
Eyewear includes at least a temple having a cavity open to the outside through first and second holes positioned opposite each other along a transversal direction. The eyewear includes a speaker assembly mounted inside the cavity, which has a speaker operable to reproduce a sound, a speaker enclosure that houses the speaker and a processing unit configured to control the operation of the speaker. The speaker includes a diaphragm designed to move in order to produce the sound, the diaphragm dividing an internal volume of the speaker enclosure into front and back cavities that are open to the outside of the speaker enclosure respectively through front and back openings. The speaker assembly is mounted inside the cavity to create an air communication between the front opening and the first hole and between the back opening and the second hole. The back opening is positioned to directly face the second hole.
A method for manufacturing an optical article (50a, 50b, 50c) comprising: - incorporating (102) optically functional nanoparticles (16; 20) into a substrate (22), thus obtaining an optical coating (24); - applying (106, 108, 110) said optical coating (24) on a surface of an optical support element (26', 26'', 26''') or incorporating said optical coating (24) as a layer within said optical support element (26', 26'', 26'''), thus obtaining said optical article (50a, 50b, 50c).
1. A method for manufacturing an optical article (62) comprising: - providing a substrate (52) of a predetermined first material and having a concave surface (50); - patterning (100) said concave surface (50) so as to obtain pores (56) having a diameter lower than 200µm and a depth within the range 10µm - 1000µm; - overmolding (102) on the concave surface (50) by applying onto said concave surface (50) a second material, thus obtaining a cover layer (58) which partially fills the pores (56) while entrapping some gas (60) in between.
The present invention relates to a process of preparation of an optical element comprising a microcellular foam film, said optical element and its use for preparing an optical lens which can be used for controlling myopia progression.
The invention relates to an optical article having a substrate made of an optical material comprising a polymer matrix, the substrate comprising a bulk part, and an external part, and said external part of the substrate is made of said optical material comprising said polymer matrix, and particles functionalized with a coupling agent embedded into said polymer matrix of the external part of the substrate, said bulk part of the substrate is made of said optical material comprising said polymer matrix, and said particles are not embedded into the bulk part of the substrate, and the haze value of a 2 mm-thick substrate as determined according to the standard ASTM D1003-00 is higher than or equal to 4 %.
For centrifugal separators; centrifugal separators for use in industrial applications within the automotive, aircraft, light industrial, ophthalmic and scientific lens, and other manufacturing industries to provide for the separation of particulate from industrial liquids, i. e., water, oil, and water soluble coolants; chip separators, chip compactors, briquette presses, wedge wire screens, filter cartridges with fabricfilters, pump stations, tanks, debris bins and spare and wear parts thereof
For centrifugal separators; centrifugal separators for use in industrial applications within the automotive, aircraft, light industrial, ophthalmic and scientific lens, and other manufacturing industries to provide for the separation of particulate from industrial liquids such as, water, oil, water soluble coolants, and spare and wear parts thereof
68.
METHOD FOR SIMULATING AN OPHTHALMIC LENS ON AN EYE OF A SUBJECT VIEWING A VIRTUAL THREE-DIMENSIONS SCENE USING A LIGHT FIELD DISPLAY
A method for simulating an ophthalmic lens on an eye of a subject viewing a virtual scene using a light field display including a light field window. The method includes calculating a virtual ray between a point of the virtual scene and a point of an eye pupil plane, the virtual ray passing through a virtual lens and being defined on the basis of a model providing a deviation angle of the virtual ray through the virtual lens, repeating the calculating for a plurality of virtual rays passing through the virtual lens and joining couples of one point of the virtual scene and another point of the eye pupil plane, determining a light field representing a modified virtual scene, and generating the light field representing the modified virtual scene on the light field window towards the eye of the subject.
(IC2)(IC2) in the UV region ranges from 280 to 380 nm that is lower than 5% for an angle of incidence of 35°, characterized in that - IC1 comprises a front main face having a mean reflection factor Ruv350-380(IC1)(IC1) in the UV region ranges from 350 to 380 nm for an angle of incidence within the range of from 0° to 15°, and preferably of 0°, is higher than or equal to 75% and the optical article has: - a mean transmission factor in the region ranging from 350 to 380 nm, defined as Tuv350-380(OA)(OA) at an angle of incidence of 0° that is lower than or equal to 2%, - a transmission factor at 380 nm, defined as T380(OA)(OA), at an angle of incidence of 0° that is lower than or equal to 8%.
A method for providing a lens element comprising a plurality of encapsulated diffractive microstructures, the method comprising: (S2) obtaining first lens member data relating to a shape and refractive index of a first lens member comprising a plurality of diffractive microstructures; (S4) obtaining second lens member data relating to a shape and refractive index of a second lens member having a surface complementary to the surface of the first lens member comprising the plurality of diffractive microstructures; (S6) generating a lens element model based on the first and second lens member data; (S3) obtaining energy balance data relating to at least two maximum levels of MTF in at least two distinct planes (z1, Z2); (S10) optimizing the lens element model based on the energy balance data; and (S 12) providing the lens element by assembling at least the first and second lens members based on the optimized lens element model.
A mold for manufacturing a thermoset optical article having a high refractive index, a method for manufacturing the mold, and a method for manufacturing the article. The mold (1) is configured for manufacturing a thermoset optical article capable of being a poly thiourethane-based lens substrate having a refractive index of from 1.54 to 1.74, by casting a thermosetting material (6) into a molding cavity (5) of the mold, the mold comprising a mineral first mold part (2) having a mineral first inner surface (2a) modified by an organosilane mold-release agent. The modified first inner surface (4) comprises a product of a dehydration-condensation reaction of a hydrolysate of an aqueous alcohol solution of the organosilane mold-release agent applied to the mineral first inner surface (2a) and cured thereon, and the modified first inner surface (4) is devoid of a coating layer of particles and is configured to be directly in contact with the cast thermosetting material.
Method, for example implemented by computer means, for determining a local spatial contrast obtained with an optical lens to be placed in front of at least a portion of an eye, wherein the method comprises: - obtaining an eye model representative of the eye, - obtaining an optical lens model representative of the optical lens to be placed in front of at least a portion of the eye, - determining a point spread function based on the system of the eye model associated with the optical lens model, - convolving a plurality of images with the determined point spread functions so as to obtain a blurred version of the image, - determining the local spatial contrast in the blurred version of the image.
The present disclosure relates to a method for the enzymatic degradation of poly(allyl diglycol carbonate) such as CR-39® polymer, consisting in contacting at least one enzyme of the invention with poly(allyl diglycol carbonate) such as CR-39® polymer in a suitable form, for a sufficient time and in non-toxic and environmentally friendly reaction conditions. The method can also be used to recover the basic monomer and/or other compounds derived from the enzymatic degradation process, which can be further used to re-obtain the polymer or as intermediates in the synthesis of other chemicals. The present disclosure also concerns the use of a kit for the enzymatic degradation of poly(allyl diglycol carbonate) such as CR-39® polymer.
The present disclosure relates to a method for the enzymatic degradation of polythiourethanes containing the thiourethane bond of formula –S-C(=O)-N(H)- in every repeating unit of the polymeric chain, consisting in contacting at least one enzyme of the invention with a polythiourethane in a suitable form, for a sufficient time and in non-toxic and environmentally friendly reaction conditions. The method can also be used to recover the basic monomer and/or other compounds derived from the enzymatic degradation process, which can be further used to re-obtain the polymer or as intermediates in the synthesis of other chemicals. The present disclosure also covers a kit for the enzymatic degradation of polythiourethanes.
A method for manufacturing an ophthalmic device, comprising a polishing step to polish a surface comprising at least one unpolished zone, the at least one unpolished zone is a zone intended not to be polished. The polishing step comprises covering during which a protective cover is provided on the surface so as to cover the at least one unpolished zone; polishing at least a part of the surface and removing the protective cover.
A retinoscopic aid device for use with a portable streak retinoscope and with an automated phoropter for testing an individual's eye. The retinoscopic aid device includes a base plate configured to be detachably fastened to the automated phoropter, an optical display unit configured to display an orientable straight line mark, the optical display unit being supported by the base plate, and a control unit of the optical display unit which is configured to orient the straight line mark of the optical display unit according to a control command of a user allowing the user to orient the straight line mark according the streak orientation of the portable streak retinoscope when looking through the portable retinoscope.
A61B 3/103 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
The disclosure provides post-production methods for functionalization of optical quality films produced by top tier manufactures. The methods disclosed herein allow for the incorporation of different additives into existing films.
The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, at least one main face of which being successively coated with a first high refractive index sheet which does not comprise any Ta2O5 layer, a second low refractive index sheet a third high refractive index sheet, a monolayer sub-layer having a thickness higher than or equal to 100 nm, and a multilayer interferential coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer. A mean reflection factor selected from Ruv for UV light, Rv for visible light and RsNIR for near infrared light is higher than or equal to 10-15% on at least one main face.
Lens element, for example a myopia control lens element, adapted for a wearer, said lens element providing a first optical function having a power based on the prescription of the wearer, and comprising a plurality of optical elements, for example at least twenty optical elements, each optical element of the plurality of optical elements providing one or more optical functions, at least one of which is different from the first optical function; wherein over at least a 4 mm diameter pupil whose center is at 10 mm from a reference point, for example the optical center, of the lens element the normalized integral of the modulation transfer function over the range of spatial frequencies comprised from 0 to 5 cycles per degree and over said pupil is smaller than or equal to 0.66, for example smaller than or equal to 0.60.
The present disclosure relates to ophthalmic lenses for correction of myopia. In particular, the present disclosure relates to an ophthalmic lens, comprising a first layer having microstructures on a first surface of the first layer, the microstructures on the first surface of the first layer being formed in a pattern, a material of the first layer being a thermoplastic material; and a second layer formed on the first surface of the first layer, wherein a glass transition temperature of the first layer is higher than a glass transition temperature of the second layer.
Myopia control lens element Lens element, for example a myopia control lens element, adapted for a wearer, said lens element providing a first optical function having a power based on the prescription of the wearer, and comprising a plurality of optical elements, for example at least twenty optical elements, each optical element of the plurality of optical elements providing one or more optical functions, at least one of which is different from the first optical function; wherein over at least a 6 mm diameter pupil whose center is at 7.5 mm from a reference point, for example the optical center, of the lens element the standard deviation of the optical power distribution over said pupil is greater than or equal to 4 diopters, for example greater than or equal to 4.5 diopters, for example greater than or equal to 7 diopters.
A lens element intended to be worn in front of an eye of a person comprising: - a refraction area having a refractive power based on a prescription for said eye of the person; and - a plurality of refractive optical elements having an optical function different from the optical function of the refraction area, wherein over an annular zone centered on a reference point, for example the optical center, of the lens element and having an inner diameter of 8 mm and an outer diameter of 17 mm, the ratio of the surface of the annular zone having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the annular zone is greater than or equal to 0.02, for example greater than or equal to 0.05, for example greater than or equal to 0.09 and smaller than or equal to 0.5, for example smaller than or equal to 0.3.
A system for determining a modification of an initial myopia control solution used by a myopic subject, comprising one or more memories having in memory values of individual features of said myopic subject and values of environmental parameters relative to conditions of use by said myopic subject of said initial myopia control solution and comprising one or more processors programmed to: determine an individual score linked to a role of said individual features in causing the myopia of said myopic subject, said individual score depending on said values of individual features, determine an environmental score linked to a role of said environmental parameters in causing the myopia of said myopic subject, said environmental score depending on said values of said environmental parameters, and determine said modification of said initial myopia control solution for said subject based on said individual and environmental scores.
A method of forming an optical element includes providing a forming insert in a thermoforming apparatus, the forming insert including a plurality of microstructures formed on a forming surface of the forming insert; heating the forming insert to a first predetermined temperature; disposing an element comprised of a polymer material in the thermoforming apparatus and in contact with the forming surface of the forming insert; and thermoforming, via the forming surface of the forming insert, the element, the molded element having microstructures formed on a surface thereof.
A lens element intended to be worn in front of an eye of a wearer, the lens element being adapted to provide a prescribed dioptric correction function in a prescription plane, the lens element including an arrangement of microoptical elements. When receiving a collimated beam of monochromatic light, the lens element is configured to produce a primary luminous intensity maximum in a prescription plane, and the arrangement of microoptical elements is configured to produce at least one first secondary luminous intensity maximum at a first proximity difference from the prescription plane and at least one second secondary luminous intensity maximum at a second proximity difference from the prescription plane, the first proximity difference and the second proximity difference having opposite signs.
A method of forming an optical lens includes providing a lens having microstructures on a surface thereof and an adhesive layer coated thereon; pressing a coating stack, via a carrier layer attached to a first surface of the coating stack by a release coating, against the adhesive layer, a second surface of the coating stack being in contact with the adhesive layer; and curing the adhesive layer and removing the carrier layer from the first surface of the coating stack via the release coating, wherein a thickness of the adhesive layer is greater than a depth of the microstructures on the surface of the lens.
The disclosure provides an additive manufacturing system comprising a tank (10) filled with a volume of a predetermined material (11), a building platform (20) on which layers (3) made from the predetermined material are formed, a curing device (12) configured for at least partially hardening the layers of the ophthalmic device, a transparent plate (21) located between the building platform (20) and the curing device (13), and a flexible separation film (22) mechanically connected by ends (31) to a frame (30) and at least partially located between the transparent plate (21) and the building platform (20), the additive manufacturing system (1) being configured so that the transparent plate, the flexible separation film and the building platform are movable one relative to the other and admit first relative positions corresponding to building positions of a layer, in which the transparent plate is applied against the flexible separation film which is in a tense state, and second relative positions corresponding to layering positions of a layer, in which the transparent plate is moved relative to the frame and is remote to the flexible separation film which is at least partially in a loose state.
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B29L 11/00 - Optical elements, e.g. lenses, prisms
A method for producing spectacles lenses (10), in which method, starting with a blank which has predetermined surface geometries on a front face (12) and a rear face (14) remote therefrom and having a contoured edge (16) therebetween, a finished part is formed by material removal and/or deposition. In a step of generating an optically active shape of the spectacles lens, the semifinished product is shaped, which has an edge region (18) in which an orientation structure (20) is also made. For at least one subsequent step of further machining, the location and position of the semifinished product in space are clearly identified and established with the aid of a positioning receptacle (22) arranged in a defined manner in space.
The invention relates to a method for determining an ophthalmic lens for a wearer and suitable for correcting the wearer's vision, comprising c) determining a virtual lens by an optimization process involving calculating iteratively a surface of the virtual lens so as to match target optical characteristics of a target lens, checking whether peripheral defocus values of the virtual lens satisfy a predetermined criterion, and if the predetermined criterion is not satisfied, reiterating the calculation of the surface of the virtual lens after modifying the target lens of the previous iteration. The determined ophthalmic lens is defined as being the virtual lens at the end of the optimization process. The invention also relates to an ophthalmic lens for a wearer for correcting the wearer's vision and intended to reduce peripheral defocus.
A fused filament fabrication 3D printing method for fabricating an optical article includes applying a surface treatment (1710) to a building plate; heating the building plate to a predetermined plate temperature (1720); dispensing a thermoplastic through a nozzle set at a predetermined nozzle temperature onto the building plate (1730) while translating the nozzle or the building plate according to a first predetermined pattern at a predetermined printing speed to form a first layer; and solidifying the first layer, wherein a range of the predetermined plate temperature is between 30° C. lower than a glass transition temperature of the thermoplastic and 20° C. higher than the glass transition temperature of the thermoplastic, and a range of the predetermined nozzle temperature is at least 100° C. higher than the glass transition temperature of the thermoplastic, and at least 50° C. lower than a degradation temperature of the thermoplastic.
B29C 64/118 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
A computer-implemented method for determining a dipping orientation of an ophthalmic lens (2) with respect to a dipping apparatus feature, the method comprising the step of: —determining a lens parameter relative to a shape of the ophthalmic lens (2): —determining said dipping orientation taking into account an interaction parameter representative of a relationship between said lens parameter and said dipping apparatus feature.
Method, for example implemented by computer means, for characterizing at least part of a lens element adapted for a wearer and comprising a plurality of optical elements, each optical element of the plurality of optical elements providing at least an optical power, for example so as to at least one of slow down, retard or prevent a progress of the abnormal refraction of the eye of the wearer; wherein the method comprises: —obtaining a two-dimension representation of the local optical power of at least part of the lens element using a deflectometry method, for example a fringe deflectometry method, —determining the optical power distribution over at least part of the two-dimension representation of the lens element, and—characterizing at least the part of the lens element within said at least part of the two-dimension representation of the lens element by analyzing the determined optical power distribution.
A method for objectively determining the optimal correction of an optical refraction of a subject, comprising the steps of: a) providing said eye of the subject with successive distinct lens powers and recording the corresponding successive neural signals of the subject while said eye of the subject receives a visual stimulus through each lens power, until the recorded neural signal corresponding to one of the lens power shows a maximum neural activity as compared to all the other recorded neural signals (blocks E2 to E5), b) determining that the optimal correction of the ophthalmic refraction of the subject corresponds to a lens power with which the subject exhibits a neural signal showing a given reduced neural activity as compared to the maximum neural activity obtained in step a) (blocks E6 and E7).
A61B 3/103 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
A61B 5/00 - Measuring for diagnostic purposes Identification of persons
The invention relates to a process for making a mold assembly (10) suitable for molding an ophthalmic lens, comprising steps of: —providing two molding shells (200A, 200B) each having a main surface (202A, 202B) to be placed in front of each other and a peripheral edge (203A, 203B), —providing a closing member (100) in the form of a band, —dropping a strip of glue (300) off around at least a major part of the peripheral edge of each molding shell, and—positioning said closing member around at least a major part of the peripheral edges of the two molding shells.
A method performed by a battery-powered electronic eyewear device for managing a battery consumption of said eyewear device based on a utilization of said eyewear device by a user, the eyewear device comprising at least one electrochromic cell, the method comprising: recording data related to the utilization of the eyewear device by the user, said utilization being based on at least the use of at least one electrochromic cell feature of the eyewear device by the user driven by electrochromic cell parameters, analyzing said recorded data and determining at least one average usage pattern of the eyewear device by the user, comprising average repartitions of ideal values of said electrochromic cell parameters in the average usage pattern and/or of power consumption of the eyewear device by the user in the average usage pattern, adapting the management of the battery consumption of the eyewear device by piloting values of the electrochromic cell parameters based on at least the average usage pattern of the user and on charging data related to a remaining state of charge of the battery.
A method for monitoring an evolution of a visual acuity value of a user of a digital device configured for displaying optotypes at a chosen optotype size, and computing a guessing rate corresponding to a percentage of optotypes correctly identified by a user. The method includes determining a visual acuity reference value based on at least a predefined first guessing rate threshold of the displayed optotypes at an optotype reference size, testing the evolution of the visual acuity value by displaying optotypes at a first optotype size corresponding to the optotype reference size, measuring the guessing rate of the displayed optotypes, and, if the measured guessing rate is below the first guessing rate threshold by more than a tolerance value, remeasuring the guessing rate of displayed optotypes at a second optotype size, the second optotype size being superior to the first optotype size.
The disclosure relates to a method for engraving an ophthalmic device, comprising: providing a photo-ablation device configured to engrave at least one face of the ophthalmic device; providing a marking pattern to be engraved on the at least one face of the ophthalmic device thanks to the photo-ablation device; and determining a kinematics to engrave the marking pattern on the at least one face of the ophthalmic device, wherein the kinematics includes a marking pattern kinematics and an engraving kinematics, both being defined as a function of at least one parameter amongst geometrical characteristics of the at least one face of the ophthalmic device to be engraved, operational parameters of the photo-ablation device, and geometrical characteristics of the marking pattern.
A lens element intended to be worn in front of an eye of a person comprising: a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of said eye of the person and a second refractive power different from the first refractive power, and a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye to slow down the progression of the abnormal refraction of the eye.
A lens element intended to be worn in front of an eye of a person comprising: a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of said eye of the person and a second refractive power different from the first refractive power; a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.
An ophthalmic element includes a vision base element and a film structure that is adhered to an optical surface of the vision base element, so that the film structure conforms to the optical surface. The film structure comprises at least one auxetic film that has a negative Poisson ratio. Using an auxetic film suppresses wrinkles, cracks and delamination that may appear in the ophthalmic element when the optical surface is synclastic.
