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1. (WO1998050314) IR AND UV ABSORBING BROWN SOLAR GLASSES, OPHTHALMIC LENSES

Pub. No.:    WO/1998/050314    International Application No.:    PCT/US1998/008444
Publication Date: Fri Nov 13 00:59:59 CET 1998 International Filing Date: Tue Apr 28 01:59:59 CEST 1998
IPC: C03C 3/089
C03C 3/11
C03C 4/02
C03C 4/08
Applicants: CORNING INCORPORATED
BROCHETON, Yves
Inventors: BROCHETON, Yves
Title: IR AND UV ABSORBING BROWN SOLAR GLASSES, OPHTHALMIC LENSES
Abstract:
The object of the present invention is brown solar glasses, absorbing UV or IR radiation, as well as solar ophthalmic lenses in said glasses. Said glasses have the following composition, expressed in percentages by weight: SiO2: 64 - 71; B2O3: 2 - 8; Al2O3: 0 - 4; ZrO2: 0 - 2; Li2O: 0 - 4; Na2O: 6 - 10; K2O: 7 - 16; CaO: 0 - 5.5; ZnO: 0 - 5.5; TiO2: 0 - 2; Fe2O3: 3 - 9; Co3O4: 0 - 0.030; NiO: 0 - 0.2; SeO2: 0.0030 - 0.1; As2O3: 0 - 0.1; Sb2O3: 0 - 0.1; SnO2: 0 - 0.1; C1: 0 - 2; Br: 0 - 2;F: 0 - 2.