-
公开(公告)号：JPH11194310A
公开(公告)日：1999-07-21
申请号：JP29542798
申请日：1998-10-16
Applicant: ESSILOR INT
Inventor： PEDRONO CLAUDE , HARSIGNY CHRISTIAN , FAUQUIER CATHERINE , JURKIEWIEZ FANNY , ROLAND ERIC
Abstract: PROBLEM TO BE SOLVED: To provide a lens having an aspherical surface which has a near sight region larger than the near sight region of the conventional multifocal lens and wider in width and is small in aberrations, i.e., astigmatism. SOLUTION: Δ is used in order to express the difference in the average spherical value between a near sight control point and the geometrical center of the lens. The surface area which is the surface area delineated by a point shorter than 20 mm from the geometrical center of the lens and of which the cylindrical value exists between 0.42Δ and 0.84Δ is made larger than the surface area which is the surface area delineated by a point shorter than 20 mm from the geometrical center of the lens and of which the cylindrical value is smaller than 0.42Δ.
-
公开(公告)号：CA2250616C
公开(公告)日：2006-03-14
申请号：CA2250616
申请日：1998-10-15
Applicant: ESSILOR INT
Inventor： ROLAND ERIC , HARSIGNY CHRISTIAN , PEDRONO CLAUDE , JURKIEWIEZ FANNY , FAUQUIER CATHERINE
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 .DELTA. 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..
-
公开(公告)号：CA2110926C
公开(公告)日：1998-09-22
申请号：CA2110926
申请日：1993-12-08
Applicant: ESSILOR INT
Inventor： MIEGE CHRISTIAN , HARSIGNY CHRISTIAN , CHAUVEAU JEAN-PIERRE , AHSBAHS FRANCOISE
Abstract: A progressive multifocal ophtalmic lens is provided having an aspherical surface comprising a distance vision portion, a near vision portion and an intermediate vision portion, in which the maximum mean sphere gradient value is situated in the intermediate vision portion of the principal meridian of progression of the lens, and the cylinder gradient over the whole aspherical surface of the lens is less than the product obtained by multiplying the power addition value at each point by a constant value coefficient.
-
公开(公告)号：DE68912087D1
公开(公告)日：1994-02-17
申请号：DE68912087
申请日：1989-10-18
Applicant: ESSILOR INT
Inventor： CORNU DANIEL RUE FRANCOIS BOUC , HARSIGNY CHRISTIAN , THIEBAUT JEAN
Abstract: A positive power ophthalmic lens has a central optically active area the diameter of which is at most equal to the diameter of its geometrical contour. It has an optional peripheral merging area around the central optically active area, between the latter and the geometrical contour. The diameter D1 in millimeters of the central optically active area is related to the power P of the lens in diopters by a general equation of the type: D1=a-b.p where a is a numerical parameter taking a value between 84 and 89 and b is a numerical parameter taking a value between 4 and 4.9. This equation makes it possible to obtain well corrected positive power ophthalmic lenses with a large diameter that are relatively light in weight.
-
公开(公告)号：AU665282B2
公开(公告)日：1995-12-21
申请号：AU5184693
申请日：1993-11-22
Applicant: ESSILOR INT
Inventor： HARSIGNY CHRISTIAN , MIEGE CHRISTIAN , CHAUVEAU JEAN-PIERRE , AHSBAHS FRANCOISE
Abstract: A progressive multifocal ophthalmic lens is provided having an aspherical surface comprising a distance vision portion, a near vision portion and an intermediate vision portion, in which the maximum mean sphere gradient value is situated in the intermediate vision portion of the principal meridian of progression of the lens, and the cylinder gradient over the whole aspherical surface of the lens is less than the product obtained by multiplying the power addition value at each point by a constant value coefficient.
-
Patent Agency Ranking
公开(公告)号：ES2077528A2
公开(公告)日：1995-11-16
申请号：ES9302566
申请日：1993-12-10
Applicant: ESSILOR INT
Inventor： HARSIGNY CHRISTIAN , CHAUVEAU JEAN-PIERRE , AHSBAHS FRANCOISE , MIEGE CHRISTIAN
Abstract: SE PROPORCIONA UNA LENTE OFTALMICA MULTIFOCAL PROGRESIVA QUE TIENE UNA SUPERFICIE ASFERICA QUE COMPRENDE UNA PORCION DE VISION DISTANTE, UNA PORCION DE VISION PROXIMA Y UNA PORCION DE VISION INTERMEDIA, EN LA CUAL EL VALOR MAXIMO DE LA PENDIENTE DE ESFERA MEDIA ESTA SITUADO EN LA PORCION DE VISION INTERMEDIA DE LA MERIDIANA PRINCIPAL DE PROGRESION DE LA LENTE, Y LA PENDIENTE DE CILINDRO SOBRE LA TOTALIDAD DE LA SUPERFICIE ESFERICA DE LA LENTE ES INFERIOR AL PRODUCTO OBTENIDO MULTIPLICANDO EL VALOR DE ADICION DE POTENCIA EN CADA PUNTO POR UN COEFICIENTE DE VALOR CONSTANTE.
-
公开(公告)号：CA2040523C
公开(公告)日：1995-06-27
申请号：CA2040523
申请日：1991-04-16
Applicant: ESSILOR INT
Inventor： CHAUVEAU JEAN-PIERRE , DEFORGES JEAN-PAUL , HARSIGNY CHRISTIAN
Abstract: Procédé pour faciliter la réalisation d'une lentille ophtalmique progressive, et lentille(s) ophtalmique(s) progressive(s) correspondante(s). Il s'agit d'une lentille ophtalmique progressive dont la face avant (11A) par exemple comporte, en continu, d'une part, une zone centrale (14), qui, présentant une courbure progressivement variable suivant une partie au moins d'au moins un méridien, en est la zone optiquement utile, et, d'autre part, entourant cette zone centrale (14), une zone périphérique de raccordement (15) se raccordant tangentiellement à celle-ci. Suivant l'invention, la zone centrale optiquement utile (14) de cette face avant (11A) est délimitée par une courbe fermée qui, en projection sur un plan perpendiculaire à l'axe géométrique de l'ensemble, est globalement de forme ovale, et le rayon de courbure de la section radiale de sa zone périphérique de raccordement (15) varie circonférentiel-lement en valeur et/ou en signe, en sorte que, le long de son bord périphérique (13), la lentille est globalement équi-épaisse. Application à l'obtention de lentilles ophtalmiques progressives plus faciles à réaliser, plus esthétiques et plus légères.
-
公开(公告)号：CA2110926A1
公开(公告)日：1994-06-12
申请号：CA2110926
申请日：1993-12-08
Applicant: ESSILOR INT
Inventor： HARSIGNY CHRISTIAN , MIEGE CHRISTIAN , CHAUVEAU JEAN-PIERRE , AHSBAHS FRANCOISE
Abstract: A progressive multifocal ophthalmic lens is provided having an aspherical surface comprising a distance vision portion, a near vision portion and an intermediate vision portion, in which the maximum mean sphere gradient value is situated in the intermediate vision portion of the principal meridian of progression of the lens, and the cylinder gradient over the whole aspherical surface of the lens is less than the product obtained by multiplying the power addition value at each point by a constant value coefficient.
-
公开(公告)号：AU523003B2
公开(公告)日：1982-07-08
申请号：AU5208879
申请日：1979-10-23
Applicant: ESSILOR INT
Inventor： BETTIOL BRUNO , HARSIGNY CHRISTIAN , LENNE WILLIAM
-
公开(公告)号：ES2163240T3
公开(公告)日：2002-01-16
申请号：ES98402532
申请日：1998-10-13
Applicant: ESSILOR INT
Inventor： PEDRONO CLAUDE , HARSIGNY CHRISTIAN , FAUQUIER CATHERINE , JURKIEWIEZ FANNY , ROLAND ERIC
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.
-
-
-
-
-
-
-
-
-
Search Results
42
records
(took 0.054 seconds)
