IR and UV absorbing brown solar glasses, ophthalmic lenses

• Main Author: BROCHETON YVES A. H
• Format: Patent
• Language: English
• Published: 03.07.2001
• Edition: 7
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS

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; Cl: 0-2; Br: 0-2; F: 0-2.