摘要:
The invention relates to an ophtalmic lens comprising, on its surface, a first central zone preferentially transmitting the long wavelengths of the visible spectrum, and a second peripheral zone preferentially transmitting the short wavelengths of the visible spectrum.
摘要:
A method of simulating an optical effect of an optical lens for a potential wearer, the method comprising: using a first camera to take a first image of a scene through a first optical lens, the first optical lens having optical characteristics according to a first ophthalmic lens design, the first camera being provided with optics arranged to simulate the optical characteristics of a human eye; and displaying the first image on a display device for viewing by the potential wearer enabling the potential wearer to visualise the optical effects of the first optical lens on his viewing ability. The position of the first camera, the first optical lens and the display device are fixed with respect to a referential frame defined by the head of the potential wearer, the head of the potential wearer being movable with respect to the scene.
摘要:
Methods for edging optical articles comprising two main faces, at least one of which being coated with an outermost layer comprising fixing the optical article to a chuck with a holding pad that adheres to both the optical article and the chuck, wherein the surface of the holding pad contacting the optical comprises an adhesive material; and edging the optical article with an edging device; wherein prior to fixing the optical article to the chuck, at least one temporary layer of an organic material is formed onto said outermost layer of the optical article, the organic material of the temporary layer comprising at least one organic compound having a fluorinated functional moiety and at least one linking functional moiety capable of establishing at least one intermolecular bond or interaction with the adhesive material of the holding pad. Optical articles obtained via these methods.
摘要:
A measurement device (100) for measuring a characteristic reading distance of an individual in a natural posture for near vision, includes: a portable or freely movable reading medium (110) presenting a plane display portion (120) suitable for displaying signs; and a measurement subassembly (140) including at least one ultrasound emitter member (150) and at least one ultrasound receiver member (151); wherein the emitter and receiver members are carried by the reading medium, and wherein at least one of the members, referred to as the first measurement member possesses a measurement axis (AME, AMR) along which emission or reception by the first measurement member is privileged and that is inclined relative to the plane of the display portion by an angle lying in the range 10 degrees to 80 degrees or that is inclinable relative to this plane of the display portion at least over an angular range extending from 10 degrees to 80 degrees.
摘要:
The light-polarizing solid coating composition which comprises (i) particles of at least one magnetic material suspended in a solvent, is characterized in that it comprises (ii) at least one dichroic dye compound.Application to ophthalmic optics.
摘要:
A method for determining by optimization a set of progressive ophthalmic lenses for a given user for whom a near vision power addition (Addn) has been prescribed includes the following steps: measuring the user's near vision individual physiological parameters; determining an ergorama associating, on each lens, a target point in each look direction in worn conditions; determining a target power defect and a resulting target astigmatism for each direction of look under worn conditions, the target power defect and the resulting target astigmatism being determined from the user's measured physiological parameters; computing the power required for each lens for said ergorama by successive iterations to reach the target power defect and the target astigmatism for each look direction.
摘要:
The invention relates to an improvement for applying a layered structure (1) onto a convex surface of a lens (10). After thermoforming the layered structure, a curvature direction of the layered structure is inverted. The structure is then applied on the lens surface by continuously pushing the structure (1) against the lens surface, starting from a contact point between a convex surface of the structure and the convex surface of the lens. The curvature direction of the layered structure is then inverted again, so that it recovers the curvature direction that resulted from thermoforming. Stresses within the layered structure are then reduced, and the structure can be assembled with the lens without defects.
摘要:
An optical article includes a transparent substrate and an abrasion-resistant layer appended to at least one surface of the substrate. The abrasion-resistant layer results from the reaction mixture of: a first organo-silane chosen from thiocarbamate-silane matrix precursor containing at least one terminal alkoxysilane group, or hydrolysates thereof, the thiocarbamate-silane compound resulting from the reaction of a polythiol including at least two —SH thiol substituent, with an isocyanato-silane compound represented by the general formula: (R1)3Si—R2—N═C═O wherein R1 represents a group selected from linear or branched (C1-C6) alkoxy, and R2 represents a group selected from linear or branched (C1-C6) alkylene, linear or branched (C1-C6) alkenylene, arylene, and (C5-C12)cycloakylene, each of these groups being optionally substituted by one to six groups selected from halogen, alkoxy, carboxy, alkylcarbonyl, alkoxycarbonyl, and perfluoroalkyl, an inorganic oxide, a curing catalyst for said thiocarbamate-silane, and a solvent for said organo-silane.
摘要:
The present invention relates to a process for transferring at least one coating onto at least one geometrically defined surface of a lens substrate to produced a lens substrate coated with at least one functional coating adhering to at least one geometrically defined surface through a layer of transparent adhesive composition.
摘要:
A method of capturing a substantially front-view image of the face of a wearer wearing at least one frame (10), the image being captured by an image-capture appliance (1), and calculating the geometrico-physiognomic parameter (H, TETA) by processing the captured image. The calculation of the geometrico-physiognomic parameter (H, TETA) includes identifying in the image the image of a predetermined remarkable point (RC) that is directly or indirectly associated with the wearer's face or with the frame, and it takes into consideration a magnitude representative of the absolute vertical angle of observation (GAMMA) formed between firstly an observation line (DO) connecting the pupil (7) of the image-capture appliance (1) to the remarkable point (RC), and secondly its projection onto a horizontal plane (PF).