Abstract: Method for determining the values of a set of n optical parameters (P1, P2, . . . , Pn) of an ophthalmic lens, n being an integer greater than or equal to 1, the method comprising: an nominal ophthalmic lens data providing step, an ophthalmic lens providing step, an optical surface measuring step, a surface errors determining step during which a set of m surface error parameters (?1, ?2, . . .

Abstract: Ophthalmic lens comprising: a primary zone on a first face; a secondary zone on the first face between said primary zone and the peripheral edge of the lens; first and second regions forming a partition of the secondary zone, which are contiguous and alternate with a pitch. A spectacle eyeglass obtained from said lens produces a first ophthalmic correction in the primary zone and in the first regions, and a second ophthalmic correction in the second regions different from said first ophthalmic correction. An active system of vision comprises an occultation device comprising: a selection device for selecting the wearer's viewing state; an optical occultation system to occult alternatively a first group and a second group according to the wearer's viewing state selected by the selection device, the first group comprising at least the primary zone and the first regions, and the second group comprising at least the second regions.

Abstract: The invention relates to a method for manufacturing an ophthalmic lens (40) having at least one optical function, which comprises the step of additively manufacturing (118) a complementary optical element (12) by depositing a plurality of predetermined volume elements (24) of a material having a predetermined refraction index on a predetermined manufacturing substrate (10), said complementary optical element (12) being configured such as to be assembled with an initial optical system (30), said manufacturing step comprising the step of determining a manufacturing setting (116) from properties relating to the deformation of said complementary optical element (12), which deformation is caused by transferring the latter onto said initial optical system (30), and said step of determining a setting comprising the step of determining said deformation properties (113) of said complementary optical element (12) from geometric properties of said manufacturing substrate (10) and said initial optical system (30) and fro

Abstract: A method of generating a target surface {tilde over (S)}( ?) of an optical lens for the manufacture of the optical lens according to optical lens parameters ?, the method comprising: providing a set of L first surface difference data E(?j) each first surface difference data E(?j) corresponding to the surface difference between a pre-calculated surface S?jpc(??j) (j=1, . . . , L) and an initial surface S?jini (j=1, . . . , L), from which the target surface will be generated, according to the expression: E(?j)=S?jpc(??j)?S?jini (j=1, . . . , L) where ?j (j=1, . . .

Abstract: Ophthalmic lens comprising: a primary zone on a first face; a secondary zone on the first face between said primary zone and the peripheral edge of the lens; first and second regions forming a partition of the secondary zone, which are contiguous and alternate with a pitch. A spectacle eyeglass obtained from said lens produces a first ophthalmic correction in the primary zone and in the first regions, and a second ophthalmic correction in the second regions different from said first ophthalmic correction. An active system of vision comprises an occultation device comprising: a selection device for selecting the wearer's viewing state; an optical occultation system to occult alternatively a first group and a second group according to the wearer's viewing state selected by the selection device, the first group comprising at least the primary zone and the first regions, and the second group comprising at least the second regions.

Abstract: Determining position parameters defining relative position of manufactured derivable surface relative to reference surface, the process comprising: a step during which a nominal surface expressed in a nominal frame of reference and corresponding to the theoretical derivable surface to be manufactured with the nominal value of the position parameters defining the relative position of the nominal surface relative to the reference surface is provided, a step during which a measured surface of the manufactured derivable surface expressed in the nominal frame of reference is provided, a step (S3) during which at least one deformation surface defined by at least one deformation adjustable parameter is provided, a step (S4) during which a composed surface is determined by adding the measured surface and the deformation surface, a step during which the position parameters and at least one deformation parameter are determined by minimizing the difference between the nominal surface and the composed surface.

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: A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame comprising the steps of: providing geometrical data of the spectacle frame, providing wearer data, and optimization of the optical system (OS) according to at least the criteria consisting of the geometrical data of the spectacle frame, the wearer data and at least one positioning data, so as to generate at least two optical surfaces (S1, S2).

Abstract: A method for calculating a customized progressive addition surface S?? of a progressive addition lens (PAL) made of a material having an optical index of n, the method, comprising at least the successive steps of: a) providing N initial progressive addition surfaces where N?1, b) calculating N intermediate surfaces S?k by flattening each initial progressive addition surfaces Sk, c) calculating a transformed intermediate surface S?, d) calculating the customized progressive addition surface S?? by cambering the transformed intermediate surface S?.

Abstract: A progressive ophthalmic lens includes at least one complex surface having a principal progression meridian. The complex surface has a horizontal reseau of bands and at least one geometrical quantity of the complex surface is substantially equal in all bands of the reseau for a given point of a vertical.

Abstract: A method and an apparatus for designing an optical lens surface for the manufacture of the optical lens, the method comprising the steps of providing a reference surface Sref, the reference surface Sref being defined by a plurality of surface points Pi each surface point Pi having a mean sphere Sph(Pi) and a cylinder Cyl(Pi); providing at least one modifying surface layer SLmod(?1, . . . , ?N, x, y) the modifying surface layer SLmod being determined as a function of N adjustment parameters ?1, ? . . . , ?N; wherein N?1 and the N adjustment parameters ?1, ?4, . . . , ?N are selected according to the desired optical properties of the optical target; combining the modifying surface layer SLmod with the reference surface Sref to obtain a target optical surface Star(x,y) according to the expression: Star(x,y)=Sref(x,y)+SLmod(?1, . . .

Abstract: A method of generating a target surface {tilde over (S)}( ?) of an optical lens for the manufacture of the optical lens according to optical lens parameters ?, the method comprising: providing a set of L first surface difference data E(?j) each first surface difference data E(?j) corresponding to the surface difference between a pre-calculated surface S?jpc(??j) (j=1, . . . , L) and an initial surface S?jini (j=1, . . . , L), from which the target surface will be generated, according to the expression: E(?j)=S?jpc(??j)?S?jini (j=1, . . . , L) where ?j (j=1, . . .

Abstract: A method cuts a patch to be applied onto a curved substrate and includes the preliminary calculation of curvilinear lengths on the substrate between a reference point and a peripheral edge of said substrate. The calculated lengths are applied to a planar film for making the patch, and then the patch is cut by connecting the ends of the applied lengths. The patch then precisely coincides with the edge of the substrate. Such a method is particularly useful for applying a functional film onto a spectacle lens, as a trimming of the lens after the film is assembled with the lens would degrade said film.

Abstract: A method for calculating a customized progressive addition surface S?? of a progressive addition lens (PAL) made of a material having an optical index of n, the method, comprising at least the successive steps of: a) providing N initial progressive addition surfaces where N?1, b) calculating N intermediate surfaces S?k by flattening each initial progressive addition surfaces Sk, c) calculating a transformed intermediate surface S?, d) calculating the customized progressive addition surface S?? by cambering the transformed intermediate surface S?.

Abstract: A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame comprising the steps of: providing geometrical data of the spectacle frame, providing wearer data, and optimization of the optical system (OS) according to at least the criteria consisting of the geometrical data of the spectacle frame, the wearer data and at least one positioning data, so as to generate at least two optical surfaces (S1, S2).

Abstract: The invention relates to a method for the optimisation determination of an ophthalmic lens that comprises the steps of: measuring parameters representative of the eye-head behaviour of the wearer; determining a central area on the lens having a diameter (Dc) that depends on the measured parameters representative of the eye-head behaviour; determining a peripheral area on the lens; optimising the lens when worn by the wearer by applying power and astigmatism target values in the central area and target values of a parameter different from the wearer's power in the peripheral area for given watching directions. The invention reduces the thickness of the lens and optimises the wearer's peripheral vision.

Abstract: A progressive ophthalmic lens includes at least one complex surface having a principal progression meridian. The complex surface has a horizontal reseau of bands and at least one geometrical quantity of the complex surface is substantially equal in all bands of the reseau for a given point of a vertical.

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 lens presents horizontal prismatic refractive power that varies progressively along the main progression meridian (MM?) with the addition of horizontal prismatic power being greater than 2 prismatic diopters in absolute value, this addition of horizontal prismatic power being defined by the difference between the horizontal prismatic refractive power at the reference point (L) of the far vision zone and the horizontal prismatic refractive power at the projection point (P?) of the reference point (P) of the near vision zone (VP) on the vertical line passing through the reference point (L) of the far vision zone.