COLORLESS P{11 O{11 {11 GLASS WITH ANOMALOUS DISPERSION IN SHORT WAVELENGTH REGION

• Main Authors: IZUMITANI T,JA, MASUDA I,JA
• Format: Patent
• Language: English
• Published: 07.08.1973
• 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

A glass having an anomalous dispersion consisting of, by weight, calculated as the component oxides of said glass, from 38 to 70% P2O5, from 1.0 to 5.0% B2O3 and from 1 to 10% Al2O3as glass-forming materials, wherein the sum of the amount of said B2O3and Al2O3 is from 2 to 15%; from 4 to 38% BeO, from 2 to 17% MgO, from 0 to 10% ZnO, from 1 to 8% CaO, from 0 to 10% SrC and from 0 to 3% As2O3 as glass modifiers, wherein the sum of the amount of said BaO, MgO, ZnO, CaO, SrO and As2 O3 is 51 to 60%; and from 0.05 to 4.0%, based on the total weight of said glass-forming materials and said glass modifiers, of TiO2.