EP 1280741 A1 20030205 - OPHTHALMIC SEGMENT GLASS WITH HIGH ND, LENSES CONTAINING SAME
Title (en)
OPHTHALMIC SEGMENT GLASS WITH HIGH ND, LENSES CONTAINING SAME
Title (de)
OPHTHALMISCHE GLASSEGMENTE MIT HOHEM ND UND DIESE ENTHALTENDE LINSEN
Title (fr)
VERRE POUR SEGMENTS OPHTALMIQUES A INDICE DE REFRACTION ELEVE
Publication
Application
Priority
US 0107876 W 20010313
Abstract (en)
[origin: WO02072491A1] The present invention relates to very high refractive index glasses (1.78 < n < 1.83), having the following composition of oxides, expressed in percentages by weight :SiO220- < 27B2O35-11Li2O2-8Na2O0-5K2O0-5BaO7-15CaO0-11La2O37-12PbO7-20TiO27-14ZrO20-5Nb2O5 > 8-16with: Li2O+Na2O+K2O > 6BaO+CaO+La2O3 > 27TiO2+Nb2O5+PbO > 29,to their use for the production of segments for multifocal corrective lenses and to multifocal corrective lenses incorporating at least one such segment in their structure.
IPC 1-7
IPC 8 full level
C03C 3/072 (2006.01); G02C 7/02 (2006.01); G02C 7/06 (2006.01)
CPC (source: EP)
C03C 3/072 (2013.01)
Citation (search report)
See references of WO 02072491A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 02072491 A1 20020919; BR 0108000 A 20021217; CA 2408225 A1 20020919; EP 1280741 A1 20030205; JP 2004519402 A 20040702; MX PA03000625 A 20030523
DOCDB simple family (application)
US 0107876 W 20010313; BR 0108000 A 20010313; CA 2408225 A 20010313; EP 01922349 A 20010313; JP 2002571415 A 20010313; MX PA03000625 A 20010313