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公开(公告)号：BR9804423A
公开(公告)日：1999-11-03
申请号：BR9804423
申请日：1998-10-16
Applicant: ESSILOR INT
Inventor： CLAUDE PEDRONO , GILLES LE SAUX , CLAIRE ROSSIER
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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Patent Agency Ranking
公开(公告)号：BR9804422A
公开(公告)日：1999-11-03
申请号：BR9804422
申请日：1998-10-16
Applicant: ESSILOR INT
Inventor： CLAUDE PEDRONO , CRISTIAN HARSIGN , CATHERINE FAUQUIER , FANNY JURKIEWIEZ , ERIC ROLAND
Abstract: The lens has an aspherical surface with a geometrical center, a reference point for near vision, and a virtually umbilical and vertical meridian line with a mean spherical and cylindrical value at each point. The area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of between 0.42 and 0.84 diopter is greater than the area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of less than 0.42 diopter.
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公开(公告)号：FR2683643A1
公开(公告)日：1993-05-14
申请号：FR9113874
申请日：1991-11-12
Applicant: ESSILOR INT
Inventor： CLAUDE PEDRONO
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. The portion of the meridian curve situated in the intermediate and near zones includes a 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. In a horizontal and vertical system of coordinates, a point of the segment has an ordinate whose value is also an increasing function of the power addition A. At said point, 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：FR2683642A1
公开(公告)日：1993-05-14
申请号：FR9113873
申请日：1991-11-12
Applicant: ESSILOR INT
Inventor： CLAUDE PEDRONO
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：AU2829692A
公开(公告)日：1993-05-13
申请号：AU2829692
申请日：1992-11-11
Applicant: ESSILOR INT
Inventor： CLAUDE PEDRONO
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：AU2829592A
公开(公告)日：1993-05-13
申请号：AU2829592
申请日：1992-11-11
Applicant: ESSILOR INT
Inventor： CLAUDE PEDRONO
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. The portion of the meridian curve situated in the intermediate and near zones includes a 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. In a horizontal and vertical system of coordinates, a point of the segment has an ordinate whose value is also an increasing function of the power addition A. At said point, 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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