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公开(公告)号：ES2163241T3
公开(公告)日：2002-01-16
申请号：ES98402534
申请日：1998-10-13
Applicant: ESSILOR INT
Inventor： LE SAUX GILLES , PEDRONO CLAUDE , ROSSIER CLAIRE
Abstract: The lens has an aspherical surface (S) presenting at any point a mean sphere and cylinder, having a distance vision zone (VL), a near vision zone (VP), an intermediate vision zone (VI) and a main meridian of progression (MM') passing through all three zones. The relationship between a maximum cylinder within a circle of 20 mm radius centered on the geometrical center of the lens and the distance from the center to a point inside the circle or maximum cylinder is less than or equal to half the maximum inclination of the mean sphere on the main meridian of progression.
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公开(公告)号：BR9711399A
公开(公告)日：1999-08-17
申请号：BR9711399
申请日：1997-09-09
Applicant: ESSILOR INT
Inventor： BAUDART THIERRY , BOUNDONCLE BERNARD , PEDRONO CLAUDE , ROSSIER CLAIRE , LALOUX THIERRY
Abstract: The invention concerns a set of progressive multifocal opthalmic lenses, each having a first progressive multifocal surface and a second surface preferably spherical. It proposes to define the set of lenses with regard to the optical characteristics of the lenses, and particularly wearer power and oblique astigmatism, in worn conditions. For this purpose, the invention defines an ergorama associating with each sight direction in worn conditions a target object point, and a given power. This ergorama supplies a power target for a definition by optimisation of the lenses, and is used in a radii plotting programme for calculating the optical characteristics during optimisation. The set of lenses has substantially identical optical performances for a given addition, whatever the power of the far vision reference point.
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公开(公告)号：CA2250616A1
公开(公告)日：1999-04-16
申请号：CA2250616
申请日：1998-10-15
Applicant: ESSILOR INT
Inventor： FAUQUIER CATHERINE , ROLAND ERIC , PEDRONO CLAUDE , HARSIGNY CHRISTIAN , JURKIEWIEZ FANNY
Abstract: An ophthalmic lens with an aspherical face is provided having a near vision region which is larger in size and wider than that of conventional multifocal lenses, and having reduced aberrations and, notably, astigmatism. Using A to signify a difference in mean sphere between the near vision control point and the geometrical center of the lens, this is achieved by making a surface area defined by points less than 20 mm from the geometrical center of the lens, and for which cylinder is comprised between 0.42.DELTA. and 0.84.DELTA. greater than the surface area defined by points less than 20 mm from the geometrical center, and for which cylinder is less than 0.42.DELTA..
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公开(公告)号：ES2112182B1
公开(公告)日：1998-11-16
申请号：ES9502060
申请日：1995-10-24
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , PEDRONO CLAUDE
Abstract: A progressive multifocal ophthalmic lens is provided having an aspherical surface with a mean sphere and a cylinder at every point. The aspherical surface has a distance vision portion, with a control point for distance vision, a near vision portion with a control point for near vision, and an intermediate vision portion between the near vision portion and the distance vision portion. A power addition value A is defined as a variation in mean sphere between the control point for distance vision and the control point for near vision portion. A base B is defined as a value of mean sphere at the control point for distance vision. A width of the near vision portion varies not only as a function of the power addition value A, but also as a function of the value B of the base. The invention thereby ensures the presence of a substantially constant object field for all values of the power addition and of the base.
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公开(公告)号：CA2265705A1
公开(公告)日：1998-03-26
申请号：CA2265705
申请日：1997-09-09
Applicant: ESSILOR INT
Inventor： BAUDART THIERRY , LALOUX THIERRY , BOURDONCLE BERNARD , PEDRONO CLAUDE , ROSSIER CLAIRE
Abstract: The invention concerns a set of progressive multifocal ophthalmic lenses, each having a first progressive multifocal surface and a second surface preferably spherical. It proposes to define the set of lenses with regard to the optical characteristics of the lenses, and particularly wearer power and oblique astigmatism, in worn conditions. For this purpose, the invention defines an ergorama associating with each sight direction in worn conditions a target object point, and a given power. This ergorama supplies a power target for a definition by optimisation of the lenses, and is used in a radii plotting programme for calculating the optical characteristics during optimisation. The set of lenses has substantially identical optical performances for a given addition, whatever the power of the far vision reference point.
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Patent Agency Ranking
公开(公告)号：CA2161560A1
公开(公告)日：1996-04-29
申请号：CA2161560
申请日：1995-10-27
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , PEDRONO CLAUDE
Abstract: A progressive multifocal ophthalmic lens is provided having an aspherical surface with a mean sphere and a cylinder at every point. The aspherical surface has a distance vision portion, with a control point for distance vision, a near vision portion with a control point for near vision, and an intermediate vision portion between the near vision portion and the distance vision portion. A power addition value A is defined as a variation in mean sphere between the control point for distance vision and the control point for near vision portion. A base B is defined as a value of mean sphere at the control point for distance vision. A width of the near vision portion varies not only as a function of the power addition value A, but also as a function of the value B of the base. The invention thereby ensures the presence of a substantially constant object field for all values of the power addition and of the base.
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公开(公告)号：CA2082615C
公开(公告)日：1995-08-08
申请号：CA2082615
申请日：1992-11-10
Applicant: ESSILOR INT
Inventor： PEDRONO CLAUDE
Abstract: Cette lentille a une surface asphérique (S) présentant une zone (VL) pour la vision de loin, une zone (VP) pour la vision de près et, entre ces deux zones, une zone (VI) pour la vision intermédiaire, avec une courbe méridienne (MM') le long de laquelle la courbure de la surface varie progressivement et qui est inclinée de haut en bas vers le côte nasal de la lentille au moins dans la zone (VI). La partie (DP) de la courbe méridienne située dans les zones (VI et VP) est divisée en un segment (DC) faisant avec la verticale un angle .alpha., dont la valeur est une fonction croissante de l'addition de puissance A de la lentille, et en un segment (CP) faisant avec la verticale un angle .omega. plus petit que .alpha.. Au point (C), à la jonction des deux segments, la surface (S) a une valeur de sphère moyenne qui correspond à une addition de puissance comprise entre 0,8 et 0,92 fois l'addition nominale de puissance de la lentille.
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公开(公告)号：GB2261526A
公开(公告)日：1993-05-19
申请号：GB9222491
申请日：1992-10-26
Applicant: ESSILOR INT
Inventor： PEDRONO CLAUDE
Abstract: The lens has an aspherical surface (S) having a zone (VL) for far vision, a zone (VP) for near vision, and between these two zones, a zone (VI) for intermediate vision, with a meridian curve (MM') along which the curvature of the surface varies progressively and which is inclined from top to bottom towards the nose side of the lens, at least in the intermediate zone (VI). The portion (DP) of the meridian curve situated in the intermediate and near zones (VI and VP) includes a segment (DC) at an angle alpha to the vertical where the value of alpha is an increasing function of the power addition A of the lens. In a horizontal and vertical system of coordinates (X'X, Y'Y), a point (C) of the segment (DC) has an ordinate whose value is also an increasing function of the power addition A. At said point (C), the mean sphere value of the surface (S) corresponds to a power addition lying in the range of 0.8 to 0.92 times the nominal power addition A of the lens.
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公开(公告)号：DE4238067A1
公开(公告)日：1993-05-13
申请号：DE4238067
申请日：1992-11-11
Applicant: ESSILOR INT
Inventor： PEDRONO CLAUDE
IPC: G02C7/02
Abstract: A spectacle lens has an aspherical surface (S) with a first region (VL) for distant vision, a second region (VP) for near vision and a third region (VI) which is for intermediate vision and which is situated between the first and second regions (VL,VP). The second part (DPM') of the main meridian curve (MM') has a segment (DC) which is inclined at an angle (alpha) to the first part (MLD) of the main meridian curve. The value of this angle (alpha) depends upon the increase (A) in refractive power of the aspherical surface (S) so that SC = SL + kA where SC is the refractive power of the surface at the point C and SL is the refractive power of the surface at the point L and k is a co-efficient which lies between 0.8 and 0.92. USE/ADVANTAGE - Multi focus spectacle lens without any abrupt change of focus.
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公开(公告)号：CA2082615A1
公开(公告)日：1993-05-13
申请号：CA2082615
申请日：1992-11-10
Applicant: ESSILOR INT
Inventor： PEDRONO CLAUDE
Abstract: The lens has an aspherical surface having a zone for far vision, a zone for near vision, and between these two zones, a zone for intermediate vision, with a meridian curve along which the curvature of the surface varies progressively and which is inclined from top to bottom towards the nose side of the lens, at least in the intermediate zone. A portion of the meridian curve situated in the intermediate and near zones is divided into a first segment at an angle alpha to the vertical where the value of alpha is an increasing function of the power addition A of the lens, and a second segment at an angle omega to the vertical where omega is smaller than alpha . At the point where the two segments meet, the mean sphere value of the surface corresponds to a power addition lying in the range 0.8 to 0.92 times the nominal power addition of the lens.
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