Essilor International

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 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 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 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.

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 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.