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公开(公告)号：FR2733328A1
公开(公告)日：1996-10-25
申请号：FR9504800
申请日：1995-04-21
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , BAUDART THIERRY , LE SAUX GILLES
Abstract: The lens has an aspherical surface (S) with a distant vision zone (VL), a close vision zone (VP) and an intermediate vision zone (VI), with a main progression meridian (MM') passing through the three zones. The three vision zones (VL, VP, VI) are separated by isocylindrical lines, and the distant vision zone has a sector angle of at least 145 degrees. A line bisecting the angle forms an angle of less than 5 degrees, and pref under 2 degrees with a vertical.
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公开(公告)号：ES2371430T3
公开(公告)日：2012-01-02
申请号：ES00400081
申请日：2000-01-13
Applicant: ESSILOR INT
Inventor： FRANCOIS SANDRINE , AHSBAHS FRANCOISE
Abstract: Procedimiento de optimización numérica de una superficie de una lente oftálmica multifocal progresiva, que incluye la etapa de definición de una superficie asférica que presenta, en cualquier punto, una esfera media y un cilindro, y que incluye una zona de visión lejana con un punto de referencia (VL), una zona de visión cercana con un punto de referencia (VC), una zona de visión intermedia, una meridiana principal de progresión que atraviesa estas tres zonas y una cruz de centrado (CC), caracterizado porque la optimización numérica utiliza los siguientes criterios: - la adición A, definida como la diferencia de esfera media entre el punto de referencia de la zona de visión cercana y el punto de referencia de la zona de visión lejana, es superior o igual a 2,50 dioptrías. - la diferencia entre la esfera media en la cruz de centrado y la esfera media en el punto de referencia en la zona de visión lejana es inferior o igual a 0,25 dioptría; - la zona de visión lejana incluye al menos un sector angular con su ápice en la cruz de referencia y un ángulo central de 110°, dentro del cual los valores de cilindro y de esfera son inferiores o iguales a 0,50 dioptría; - en una zona de la lente por encima del punto de referencia de la visión cercana, que se extiende 7 mm por debajo de una línea horizontal ubicada 11 mm por debajo de la cruz de centrado: -el valor absoluto de la diferencia entre los valores máximos del cilindro sobre una distancia de 20 mm a ambos lados de la meridiana es inferior o igual a 0,30 dioptría; y - a cada lado de la meridiana, el valor absoluto de la diferencia entre el valor máximo del cilindro (max_t, max_n) sobre una distancia de 20 mm desde dicha meridiana y el valor mínimo del cilindro (min_t, min_n) sobre una distancia de 20 mm desde dicha meridiana es inferior o igual al producto k*A obtenido al multiplicar la adición por una constante k, la constante k equivale a 0,10.
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公开(公告)号：ES2262779T3
公开(公告)日：2006-12-01
申请号：ES02701385
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , DEVIE PIERRE
Abstract: Una lente oftálmica multifocal progresiva, que comprende una superficie asférica con en todo punto una esfera media (S) y un cilindro (C), una zona de visión de lejos, una zona de visión intermedia y una zona de visión de cerca, un meridiano principal de progresión que atraviesa estas tres zonas, una adición igual a la diferencia de esfera media entre un punto de referencia de la zona de visión de cerca y un punto de referencia de la zona de visión de lejos, una longitud de progresión inferior a 12 mm, la longitud de progresión siendo igual a la distancia vertical entre una cruz de montaje y el punto del meridiano en el que la esfera media es superior a 85% de la adición en la esfera en el punto de referencia para la visión de lejos, caracterizada porque la relación entre - la integral del producto del cilindro por la norma del gradiente de la esfera, sobre un círculo de 40 mm de diámetro centrado en el centro geométrico de la lente, por una parte y - el producto del área de este círculo, de la adición y del valor máximo de la norma del gradiente de la esfera sobre la parte del meridiano comprendida en este círculo, por otra parte es inferior a 0, 14.
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公开(公告)号：AT329287T
公开(公告)日：2006-06-15
申请号：AT02701385
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , DEVIE PIERRE
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公开(公告)号：AU2002234718B2
公开(公告)日：2005-08-11
申请号：AU2002234718
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , DEVIE PIERRE
IPC: G02C7/06 , G02C7/02 , G02C007/02
Abstract: A progressive multifocal ophthalmic lens having a far vision region, an intermediate vision region and a near vision region, a main meridian of progression passing through said three regions, and a power addition equal to a difference in mean sphere between a near vision region control point and a far vision region control point is provided. The lens has a progression length less than 12 mm, defined as the vertical distance between a mounting center and a point on the meridian where mean sphere is greater than mean sphere at the far vision control point by 85% of the power addition value. To ensure excellent optical performance of the lens despite this short length of progression, the ratio between the product of cylinder times the norm of sphere gradient, and the square of power addition is less than 0.08 mm-1 at every point within a 40 mm diameter disc centered on the center of the lens. Additionally, cylinder within that part of the disc situated above the mounting center is less than 0.5 times power addition.
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Patent Agency Ranking
公开(公告)号：FR2850763B1
公开(公告)日：2005-07-01
申请号：FR0301185
申请日：2003-02-03
Applicant: ESSILOR INT
Inventor： POULAIN ISABELLE , DROBE BJORN , HARO CLOTILDE , ALLIONE PASCAL , AHSBAHS FRANCOISE
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.
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公开(公告)号：CA2174398C
公开(公告)日：2005-02-01
申请号：CA2174398
申请日：1996-04-17
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , BAUDART THIERRY , LE SAUX GILLES
Abstract: In a progressive multifocal ophthalmic lens providing excellent performance in the far vision region, good width of the near vision region and gentle progression in the intermediate vision region therebetween, the far vision region comprises an angular sector defined by two half-lines that intersect at the geometrical center of the lens forming an upwardly-directed angular segment with an included angle of preferably more than 145.degree. in which all points have a cylinder less than A/2 diopters, and constraints are applied governing the gentleness of progression in the intermediate vision region and the relative width of the near vision region.
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公开(公告)号：AU764867B2
公开(公告)日：2003-09-04
申请号：AU1348600
申请日：2000-01-21
Applicant: ESSILOR INT
Inventor： FRANCOIS SANDRINE , AHSBAHS FRANCOISE
Abstract: The lens has a mean sphere and a cylinder at each of points of an aspherical surface of the lens. A main progression meridian passes through far, near and intermediate vision regions. Differences between maximum cylinder values over a distance of 20 mm at both sides of the meridian have an absolute value less than or equal to 0.30 diopters. An absolute value of difference between maximum and minimum values of cylinder at each side of the meridian is less than or equal to the product of power addition and a constant having a value of 0.10. The power addition is defined as a difference in the mean sphere between a reference point (VP) of the near vision region and a reference point (VL) of the far vision region, and is greater than or equal to 2.50 diopters.
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公开(公告)号：BR0204015A
公开(公告)日：2002-12-31
申请号：BR0204015
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , DEVIE PIERRE
Abstract: A progressive multifocal ophthalmic lens having a far vision region, an intermediate vision region and a near vision region, a main meridian of progression passing through said three regions, and a power addition equal to a difference in mean sphere between a near vision region control point and a far vision region control point is provided. The lens has a progression length less than 12 mm, defined as the vertical distance between a mounting center and a point on the meridian where mean sphere is greater than mean sphere at the far vision control point by 85% of the power addition value. To ensure excellent optical performance of the lens despite this short length of progression, the ratio between the product of cylinder times the norm of sphere gradient, and the square of power addition is less than 0.08 mm-1 at every point within a 40 mm diameter disc centered on the center of the lens. Additionally, cylinder within that part of the disc situated above the mounting center is less than 0.5 times power addition.
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公开(公告)号：CA2436336A1
公开(公告)日：2002-08-15
申请号：CA2436336
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , DEVIE PIERRE
Abstract: The invention concerns a progressive multifocal ophthalmic lens, comprising an aspherical surface, with equal addition value to the mean sphere difference between a reference point of the near-vision region and a reference point of the far-vision region. It has a progression length less than 12 mm, the progression length being equal to the vertical distance between a mounting cross and the point of the meridian where the mean sphere value is higher by 85 % of the addition value than the sphere value at the reference point for far-vision. To provide the lens with good vision characteristics, not only about the meridian, but also in the extrafoveal vision regions, the ratio between the product of the cylinder by gradient norm of the sphere and the square of the addition value is less than 0.08 mm-1 at any point of a disc with a diameter of 40 mm centred on the lens centre. Additionally, the cylinder in the part of the disc located above the mounting cross in less th an 0.5 times the addition value. Said characteristics ensure optical performanc es of the lens, despite the low value of the progression length.
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