Essilor International

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 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 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.