EP 2089755 A2 20090819 - MULTI-LAYERED GRADIENT INDEX PROGRESSIVE LENS
Title (en)
MULTI-LAYERED GRADIENT INDEX PROGRESSIVE LENS
Title (de)
MEHRSCHICHTIGE PROGRESSIVE GRADIENTENINDEXLINSE
Title (fr)
VERRE PROGRESSIF À INDICE GRADIENT MULTICOUCHE
Publication
Application
Priority
- US 2007022615 W 20071025
- US 85446906 P 20061025
Abstract (en)
[origin: WO2008051592A2] The present invention relates to a gradient index progressive addition spectacle lens that provides improved optical performance and a wide visual field. The lens comprises a plurality of axially layered and bonded lens sections of continuous curvature at least one of which has a refractive index gradient oriented transverse to a meridian of the lens that functions as a progressive intermediate vision zone between viewing portions of different refractive index that provide the refractive powers for corresponding vision portions of the lens. The other layer(s) of the lens incorporates a generally constant or similarly changing refractive index.
IPC 8 full level
G02C 7/06 (2006.01)
CPC (source: EP)
G02C 7/061 (2013.01); G02C 2202/12 (2013.01); G02C 2202/16 (2013.01)
Citation (search report)
See references of WO 2008051592A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008051592 A2 20080502; WO 2008051592 A3 20080821; WO 2008051592 A8 20080626; CN 101681028 A 20100324; EP 2089755 A2 20090819; JP 2010507834 A 20100311; MX 2009004328 A 20091113
DOCDB simple family (application)
US 2007022615 W 20071025; CN 200780048156 A 20071025; EP 07861509 A 20071025; JP 2009534648 A 20071025; MX 2009004328 A 20071025