Abstract: Methods and systems for image display with a head-mounted device, wherein customization of the display is achieved by taking into account wearer-specific visualization parameters. Such visualization parameters include parameters pertaining to the design of the device and/or wearer ophthalmic data such as wearer prescription data. Preferred images are computer-generated holographic images.

Abstract: A method for providing a display device for an electronic information device configured to display a virtual image to a user, the electronic information device including an optical element having a nonzero optical power and configured to be positioned in front of an eye of a user, the display device including a light source and a guide element configured to guide optical beams emitted by the light source to the eye of the user to allow viewing of the virtual image, the method including: providing a value of a parameter of the virtual image; and determining an optimum value of a display parameter of the display device from at least one optical power at a point of the optical element and from the value of the parameter of the virtual image.

Abstract: A method of determining a refractive power value characterising an ophthalmic lens for correction of an individual's eye ametropia includes: obtaining first data representative of a refraction value and second data representative of a position of the individual's head with respect to a refraction apparatus when the refraction value was determined; determining the refractive power value as a function of the first data and of a relative position, derived the second data, of the refraction apparatus with respect to a centre of rotation of the eye when the refraction value was determined. A corresponding electronic device is also proposed.

Abstract: A method of ordering an ophthalmic lens comprises the following steps: —obtaining data representative of a desired correction for a wearer's eye; —determining (S6, S8), using an electronic device, a lens power to be measured on a lensmeter based on the obtained data and on at least one parameter defining an expected position of the lens with respect to the wearer's eye, wherein the lens power corresponds to the power measured on the lensmeter for a lens adapted to provide the desired correction to the wearer's eye when placed at the expected position with respect to the wearer's eye; —ordering (S10) the ophthalmic lens specifying the determined power. A corresponding system is also provided.

Abstract: A process for manufacturing an ophthalmic lens having at least one optical function, includes the following steps: additively manufacturing (100) an intermediate optical element by depositing a plurality of preset volume elements of at least one material having a preset refractive index, the intermediate optical element including a target ophthalmic lens and a thickness allowance consisting of a portion of the plurality of volume elements; and subtractively manufacturing (300), by machining, the target ophthalmic lens from the intermediate optical element, the machining being carried out in a preset sequence, of at least one step, the preset sequence making it possible to subtract the thickness allowance, the additive manufacturing step (100) including a step of determining a manufacturing setpoint for the intermediate optical element in which the thickness allowance is determined depending on the preset sequence defined in the subtractive manufacturing step (300).

Abstract: Methods and systems for image display with a head-mounted device, wherein customization of the display is achieved by taking into account wearer-specific visualization parameters. Such visualization parameters include parameters pertaining to the design of the device and/or wearer ophthalmic data such as wearer prescription data. Preferred images are computer-generated holographic images.

Abstract: A process for manufacturing an ophthalmic lens having at least one optical function, includes the following steps: additively manufacturing (100) an intermediate optical element by depositing a plurality of preset volume elements of at least one material having a preset refractive index, the intermediate optical element including a target ophthalmic lens and a thickness allowance consisting of a portion of the plurality of volume elements; and subtractively manufacturing (300), by machining, the target ophthalmic lens from the intermediate optical element, the machining being carried out in a preset sequence, of at least one step, the preset sequence making it possible to subtract the thickness allowance, the additive manufacturing step (100) including a step of determining a manufacturing setpoint for the intermediate optical element in which the thickness allowance is determined depending on the preset sequence defined in the subtractive manufacturing step (300).

Abstract: A method of calculating an optical system (OS), the optical system (OS) being identified by a function (OF), the optical system (OS) having a first part (F1) defined by a first equation (EF1) and a second part (F2) defined by a second equation (EF2), the method performed by: a generating step (GEN), in which a virtual optical system (VOS) is used to generate a virtual function (VOF); a modification step (MOD), in which the virtual function (VOF) is modified so as obtain the function (OF); a calculation step (CAL), in which the second equation (EF2) is calculated from the function (OF), and the first equation (EF1). A method of manufacturing an optical system (OS) is also disclosed.

Abstract: The invention relates to a method of calculating an optical system (OS), the optical system (OS) being identified by a function (OF), the optical system (OS) comprising a first part (F1) defined by a first equation (EF1) and a second part (F2) defined by a second equation (EF2), the method comprising: —a generating step (GEN), in which a virtual optical system (VOS) is used to generate a virtual function (VOF); —a modification step (MOD), in which the virtual function (VOF) is modified so as obtain the function (OF); —a calculation step (CAL), in which the second equation (EF2) is calculated from the function (OF), and the first equation (EF1). The invention relates also to a method of manufacturing an optical system (OS).

Abstract: The invention relates to an ophthalmic lens for constituting an ophthalmic display, associated with an optical imager for shaping light beams and directing them towards the eye of the wearer so as to enable information content to be viewed, said optical imager being secured to said lens. According to the invention, the lens is associated with marking including referencing for the position of said imager relative to said lens as a function of the correction parameters of said lens.

Abstract: The invention relates to an ophthalmic lens for constituting an ophthalmic display, associated with an optical imager for shaping light beams and directing them towards the eye of the wearer so as to enable information content to be viewed, said optical imager being secured to said lens. According to the invention, the lens is associated with marking including referencing for the position of said imager relative to said lens as a function of the correction parameters of said lens.

Abstract: The invention relates to a method of calculating an optical system (OS), the optical system (OS) being identified by a function (OF), the optical system (OS) comprising a first part (F1) defined by a first equation (EF1) and a second part (F2) defined by a second equation (EF2), the method comprising: —a generating step (GEN), in which a virtual optical system (VOS) is used to generate a virtual function (VOF); —a modification step (MOD), in which the virtual function (VOF) is modified so as obtain the function (OF); —a calculation step (CAL), in which the second equation (EF2) is calculated from the function (OF), and the first equation (EF1). The invention relates also to a method of manufacturing an optical system (OS).

Abstract: The optical system presents accommodation compensation, the system including in combination two multifocal lenses, one of them being an aperture lens and the other a field lens.

Abstract: Progressive multifocal ophthalmic lens having a power addition prescription and presenting a complex surface having a fitting cross and a principal meridian of progression. The lens has, when being worn, a normalized reduced root mean square deviation of less than 0.025 microns per dioptre over a zone that includes the far vision control point and covering a sector whose apex lies 4° below the fitting cross with an angular aperture of between 150° and 160°; and a progression length of 25° or less, the progression length being defined as the angle of lowered of the view direction from the fitting cross down to the point on the meridian for which the wearer's optical power reaches 85% of the addition prescription. The lens is suitable for increased far vision with good accessibility to near vision.

Abstract: Progressive multifocal ophthalmic lens having a power addition prescription and presenting a complex surface having a fitting cross and a principal meridian of progression. The lens has, when being worn, a normalized reduced root mean square deviation of less than 0.025 microns per diopter over a zone that includes the far vision control point and covering a sector whose apex lies 4° below the fitting cross with an angular aperture of between 150° and 160°; and a progression length of 25° or less, the progression length being defined as the angle of lowered of the view direction from the fitting cross down to the point on the meridian for which the wearer's optical power reaches 85% of the addition prescription. The lens is suitable for increased far vision with good accessibility to near vision.

Abstract: The optical system presents accommodation compensation, the system including in combination two multifocal lenses, one of them being an aperture lens and the other a field lens.

Abstract: A method for measuring the geometrical structure of an optical component (2) in transmission, comprises illuminating the optical component by means of a first incident beam (8, 10), the wavefront of which is known. After the first beam is transmitted by the optical component, its wavefront is measured by deflectometry (16, 18). The optical component is then illuminated by a second incident beam (12, 14), the wavefront of which is known. After the second beam is transmitted by the optical component, its wavefront is measured by deflectometry (16, 18). The geometrical structure of the optical component is then calculated from the measured wavefronts. Measuring light transmitted in two distinct optical configurations allows a calculation by optimizing the two surfaces of the component, without prior knowledge of one of the surfaces.

Abstract: An ophthalmic lens having a complex surface and a toric or spherical surface is represented in a model using a prism reference point and a prescription point on the complex surface, the normal to the complex surface at the prism reference point, the local characteristics of the complex surface at the prescription point or around the prescription point, lens thickness measured along the axis defined by the normal to the complex surface, the plane tangential to the toric or spherical surface on the axis, and the curvatures of the toric or spherical surface. Representation of the lens in this model allows calculation of the toric or spherical surface without knowing all the characteristics of the complex surface. Calculations are simpler for the fitting of the lens into frames adapted to the wearer.

Abstract: An ophthalmic lens having a complex surface and a toric or spherical surface is represented in a model using a prism reference point and a prescription point on the complex surface, the normal to the complex surface at the prism reference point, the local characteristics of the complex surface at the prescription point or around the prescription point, lens thickness measured along the axis defined by the normal to the complex surface, the plane tangential to the toric or spherical surface on the axis, and the curvatures of the toric or spherical surface. Representation of the lens in this model allows calculation of the toric or spherical surface without knowing all the characteristics of the complex surface. Calculations are simpler for the fitting of the lens into frames adapted to the wearer.

Abstract: The invention relates to a method for fitting, in a frame, a progressive ophthalmic lens prescribed for a wearer. It proposes that only the horizontal position of the wearer's pupil be measured on the wearer. From this measurement, and from the total height of the pattern of the frame, the lens is positioned in the frame, and is then machined and fitted into the frame. The invention makes it possible, when fitting lenses, to avoid the errors brought about by the measuring of the height of the wearer's pupil with respect to the frame.