-
公开(公告)号：CA2436336C
公开(公告)日：2009-10-06
申请号：CA2436336
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , DEVIE PIERRE
Abstract: The invention relates to a progressive multifocal ophthalmic lens having a f ar 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 differen ce in mean sphere between a near vision region control point and a far vision region control point. The lens has a progression length less than 12 mm, defined as the vertical distance betwe en 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. These features ensure optical performances of the lens, despite the low valu e of the progression length.
-
公开(公告)号：ES2263766T3
公开(公告)日：2006-12-16
申请号：ES02701383
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 - el producto del cilindro por la norma del gradiente de la esfera, por una parte y - el cuadrado de la adición por otra parte, es inferior a 0, 08 mm-1 en cualquier punto de un disco de 40 mm de diámetro centrado en el centro geométrico de la lente, y porque el cilindro en la parte del disco situada por encima de una cruz de montaje es inferior a 0, 5 veces la adición.
-
公开(公告)号：BR0204014A
公开(公告)日：2003-05-27
申请号：BR0204014
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANCOISE , DEVIE PIERRE
-
公开(公告)号：DE60132551T2
公开(公告)日：2009-01-22
申请号：DE60132551
申请日：2001-08-17
Applicant: ESSILOR INT
Inventor： DEVIE PIERRE , BELL FRANCIS , LE SAUX GILLES
IPC: G01B11/255 , G01M11/00 , G01M11/02
Abstract: A method for measuring the geometrical structure of an optical component ( 2 ) in transmission, comprises illuminating the optical component by means of a first incident beam ( 8, 10 ), the wavefront of which is known. After the first beam is transmitted by the optical component, its wavefront is measured by deflectometry ( 16, 18 ). The optical component is then illuminated by a second incident beam ( 12, 14 ), the wavefront of which is known. After the second beam is transmitted by the optical component, its wavefront is measured by deflectometry ( 16, 18 ). The geometrical structure of the optical component is then calculated from the measured wavefronts. Measuring light transmitted in two distinct optical configurations allows a calculation by optimizing the two surfaces of the component, without prior knowledge of one of the surfaces. The first and second beams may be different and may illuminate the same surface of the component; thus it is possible to use identical beams and to illuminate each surface of the component in succession.
-
公开(公告)号：ES2300355T3
公开(公告)日：2008-06-16
申请号：ES01965331
申请日：2001-08-17
Applicant: ESSILOR INT
Inventor： DEVIE PIERRE , BELL FRANCIS , LE SAUX GILLES
IPC: G01M11/00 , G01B11/255 , G01M11/02
Abstract: Procedimiento de medición por transmisión de la estructura geométrica de un componente óptico (2), que comprende las etapas: - de iluminación del componente óptico con una primera luz incidente (8, 10), cuyo frente de onda es conocido, - de medición (16, 18) del frente de onda de dicha primera luz tras la transmisión por dicho componente óptico, - de iluminación del componente óptico con una segunda luz incidente (12, 14), cuyo frente de onda es conocido, - de medición (16, 18) del frente de onda de dicha segunda luz tras la transmisión por dicho componente óptico, - de cálculo de la estructura geométrica de dicho componente óptico a partir de los frentes de ondas medidos en dichas etapas de medición.
-
Patent Agency Ranking
公开(公告)号：AT329286T
公开(公告)日：2006-06-15
申请号：AT02701383
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.
-
公开(公告)号：FR2813391A1
公开(公告)日：2002-03-01
申请号：FR0010794
申请日：2000-08-22
Applicant: ESSILOR INT
Inventor： DEVIE PIERRE , BELL FRANCIS , LE SAUX GILLES
Abstract: The invention concerns an apparatus and a method for transmission measurement of the geometric structure of an optical component (2), comprising steps which consist in: illuminating the optical component with a first incident light (8, 10) whereof the wave front is known; measuring by deflectometry 16, 18) the wave front of said first light after transmission by said optical component; illuminating the optical component with a second incident light (12, 14) whereof the wave front is known; measuring by deflectometry (16, 18) the wave front of said second light after transmission by said optical component; and calculating the geometric structure of said optical component from the measured wave fronts during the measuring steps. The measurement of the light transmitted in two separate optical configurations enables to calculate by optimisation of the two surfaces of the component, without prior knowledge of one of the surfaces. The first and second lights can be different and illuminate a common surface of the component, identical lights can also be used and each surface of the component can be illuminated successively.
-
公开(公告)号：BRPI0204014B1
公开(公告)日：2016-01-26
申请号：BR0204014
申请日：2002-02-01
Applicant: ESSILOR INT
Inventor： AHSBAHS FRANÇOISE , DEVIE PIERRE
Abstract: "lente oftálmica multifocal progressiva com variação rápida de potência". que tem uma região para visão distante, uma região para visão intermediária e uma região para visão próxima, um meridiano principal da progressão que passa através das ditas três regiões, e uma adição de potência igual a uma diferença na esfera média entre um ponto de controle da região para visão próxima e um ponto de controle da região para visão distante. a lente tem um comprimento da progressão menor do que 12 mm, definido como a distância vertical entre um centro de montagem e um ponto no meridiano onde a esfera média é maior do que a esfera média no ponto de controle para visão distante em 85% do valor da adição de potência. para assegurar boas características visuais boas não somente em torno do meridiano, mas também nas regiões de visão extra-foveal, a razão entre a integral do produto do cilindro vezes a norma do gradiente da esfera, em um círculo de 40 mm de diâmetro centrado no centro da lente, e o produto da área desse círculo, da adição de potência e um valor máximo da norma do gradiente da esfera em relação à parte do meridiano compreendida dentro desse círculo é menor do que 0,14.
-
公开(公告)号：DE60132551D1
公开(公告)日：2008-03-13
申请号：DE60132551
申请日：2001-08-17
Applicant: ESSILOR INT
Inventor： DEVIE PIERRE , BELL FRANCIS , LE SAUX GILLES
IPC: G01M11/00 , G01B11/255 , G01M11/02
Abstract: A method for measuring the geometrical structure of an optical component ( 2 ) in transmission, comprises illuminating the optical component by means of a first incident beam ( 8, 10 ), the wavefront of which is known. After the first beam is transmitted by the optical component, its wavefront is measured by deflectometry ( 16, 18 ). The optical component is then illuminated by a second incident beam ( 12, 14 ), the wavefront of which is known. After the second beam is transmitted by the optical component, its wavefront is measured by deflectometry ( 16, 18 ). The geometrical structure of the optical component is then calculated from the measured wavefronts. Measuring light transmitted in two distinct optical configurations allows a calculation by optimizing the two surfaces of the component, without prior knowledge of one of the surfaces. The first and second beams may be different and may illuminate the same surface of the component; thus it is possible to use identical beams and to illuminate each surface of the component in succession.
-
公开(公告)号：DE60212058T2
公开(公告)日：2007-01-04
申请号：DE60212058
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.
-
-
-
-
-
-
-
-
-
Search Results
24
records
(took 0.021 seconds)
