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1. MYPI 97001922 - REFRACTIVE INDEX GRADIENT LENS

Office Malaisie
Numéro de la demande PI 97001922
Date de la demande 02.05.1997
Numéro de publication PI 97001922
Date de publication 22.05.2008
Type de publication A
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
B29D 11/00
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
29TRAVAIL DES MATIÈRES PLASTIQUES; TRAVAIL DES SUBSTANCES À L'ÉTAT PLASTIQUE EN GÉNÉRAL
DFABRICATION D'OBJETS PARTICULIERS, À PARTIR DE MATIÈRES PLASTIQUES OU DE SUBSTANCES À L'ÉTAT PLASTIQUE
11Fabrication d'éléments optiques, p.ex. lentilles ou prismes
Déposants INNOTECH, INC.
Inventeurs AMITAVA GUPTA
RONALD D. BLUM
Mandataires DATO' V.L. KANDAN
Données relatives à la priorité 08643656 06.05.1996 US
Titre
(EN) REFRACTIVE INDEX GRADIENT LENS
Abrégé
(EN)
AN OPTICAL PRODUCT SUCH AS AN OPTICAL LENS, OR SEMI-FINISHED LENS BLANK IS PROVIDED COMPRISING A COMPOSITE OF AT LEAST THREE DIFFERENT AND SEPARATELY APPLIED LAYERS, 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 FOR TO NEAR. IN ADDITION, A METHOD IS PROVIDED FOR SIMPLY, QUICKLY AND INEXPENSIVELY MANUFACTURING A COMPOSITE REFRACTIVE GRADIENT PROGRESSIVE MULTIFOCAL LENS. A TRANSITION ZONE DISPOSED BETWEEN A BASE AND AN OUTER LAYER INCLUDES A DISTINCT AND SEPARATELY APPLIED TRANSITION LAYER OR LAYERS 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.FIG. 5