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1. CA2253786 - VERRE A GRADIENT D'INDICE DE REFRACTION

Office Canada
Numéro de la demande 2253786
Date de la demande 15.04.1997
Numéro de publication 2253786
Date de publication 13.11.1997
Numéro de délivrance
Date de délivrance 15.08.2006
Type de publication C
CIB
G02C 7/06
GPHYSIQUE
02OPTIQUE
CLUNETTES; LUNETTES DE SOLEIL OU LUNETTES PROTECTRICES DANS LA MESURE OÙ LEURS CARACTÉRISTIQUES SONT LES MÊMES QUE CELLES DES LUNETTES; LENTILLES DE CONTACT
7Pièces optiques
02Verres; Systèmes de verres
06bifocaux; multifocaux
G02B 3/10
GPHYSIQUE
02OPTIQUE
BÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES
3Lentilles simples ou composées
10Lentilles bifocales; Lentilles multifocales
G02C 7/02
GPHYSIQUE
02OPTIQUE
CLUNETTES; LUNETTES DE SOLEIL OU LUNETTES PROTECTRICES DANS LA MESURE OÙ LEURS CARACTÉRISTIQUES SONT LES MÊMES QUE CELLES DES LUNETTES; LENTILLES DE CONTACT
7Pièces optiques
02Verres; Systèmes de verres
CPC
B29D 11/00355
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11Producing optical elements, e.g. lenses or prisms
00009Production of simple or compound lenses
00355with a refractive index gradient
B29D 11/0073
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11Producing optical elements, e.g. lenses or prisms
0073Optical laminates
G02C 7/061
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7Optical parts
02Lenses; Lens systems ; ; Methods of designing lenses
06bifocal; multifocal ; ; progressive
061Spectacle lenses with progressively varying focal power
G02C 2202/12
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
2202Generic optical aspects applicable to one or more of the subgroups of G02C7/00
12Locally varying refractive index, gradient index lenses
G02C 2202/16
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
2202Generic optical aspects applicable to one or more of the subgroups of G02C7/00
16Laminated or compound lenses
Déposants INNOTECH, INC.
Inventeurs BLUM, RONALD D.
GUPTA, AMITAVA
Données relatives à la priorité 08643656 06.05.1996 US
Titre
(EN) REFRACTIVE INDEX GRADIENT LENS
(FR) VERRE A GRADIENT D'INDICE DE REFRACTION
Abrégé
(EN)
An optical product such as an optical lens, or semi-finished lens blank (10) is provided comprising a composite of at least three different and separately applied layers (40), each layer having a different refractive index which allow for a progressive multifocal lens having a wide and natural progression of vision when looking from far to near. In addition, a method is provided for simply, quickly and inexpensively manufacturing a composite refractive gradient progressive multifocal lens. A transition zone (45) disposed between a base and an outer layer (50) includes a distinct and separately applied transition layer or layers (40) having an effective refractive index which is intermediate between the refractive indices of the base and outer layers, and preferably approximates the geometric mean of the refractive indices of the base and outer layers. This transition zone may include multiple transition layers, with each transition layer having a different and distinct refractive index. The lens is substantially free of unwanted peripheral astigmatism, incorporates a wide reading zone and is easy to fit a patient and possesses a cosmetic appearance which is mostly invisible.

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