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公开(公告)号：FR2753805A1
公开(公告)日：1998-03-27
申请号：FR9611478
申请日：1996-09-20
Applicant: ESSILOR INT
Inventor： BAUDART THIERRY , BOURDONCLE BERNARD , LALOUX THIERRY , 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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公开(公告)号：FR2726374B1
公开(公告)日：1996-12-27
申请号：FR9412978
申请日：1994-10-28
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：DE4238067C2
公开(公告)日：1996-07-11
申请号：DE4238067
申请日：1992-11-11
Applicant: ESSILOR INT
Inventor： PEDRONO CLAUDE
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公开(公告)号：AU3446395A
公开(公告)日：1996-05-09
申请号：AU3446395
申请日：1995-10-25
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：FR2726374A1
公开(公告)日：1996-05-03
申请号：FR9412978
申请日：1994-10-28
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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Patent Agency Ranking
公开(公告)号：DE19538470A1
公开(公告)日：1996-05-02
申请号：DE19538470
申请日：1995-10-16
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , PEDRONO CLAUDE
Abstract: A progressive multifocal ophthalmic lens comprises an aspherical surface having a mean sphere and a cylinder at every point thereof, said surface comprising a distance vision portion and a near vision portion, the lens having a power addition value A defined as the variation in mean sphere between a distance vision control point L on said distance vision portion and a near vision control point P on said near vision portion, and a base B defined as a value of mean sphere at said distance vision control point, in which the width of said near vision portion varies not only as a function of said power addition value A, but also as a function of the value B of said base thereby ensuring the presence of a substantially constant object field for all values of said power addition and said base.
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公开(公告)号：GB2294553A
公开(公告)日：1996-05-01
申请号：GB9522051
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：GB2261527B
公开(公告)日：1995-05-31
申请号：GB9222492
申请日：1992-10-26
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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公开(公告)号：GB2261527A
公开(公告)日：1993-05-19
申请号：GB9222492
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). A portion (DP) of the meridian curve situated in the intermediate and near zones (VI and VP) is divided into a first segment (DC) at an angle cx to the vertical where the value of alpha is an increasing function of the power addition A of the lens, and a second segment (OP) at an angle omega to the vertical where omega is smaller than alpha . At the point (C) where the two segments meet, the mean sphere value of the surface (S) corresponds to a power addition lying in the-range 0.8 to 0.92 times the nominal power addition A of the lens.
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公开(公告)号：BR9204389A
公开(公告)日：1993-05-18
申请号：BR9204389
申请日：1992-11-12
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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