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    Opal glass compositions
    2.
    发明授权
    Opal glass compositions 失效
    OPAL玻璃组合物

    公开(公告)号：US3661601A

    公开(公告)日：1972-05-09

    申请号：US3661601D

    申请日：1969-03-21

    Applicant: CORNING GLASS WORKS

    Inventor： DUMBAUGH WILLIAM H ,  FLANNERY JAMES E ,  HARES GEORGE B

    IPC: C03C3/118 ,  C03C4/00 ,  C03C4/02 ,  C03C10/16 ,  C03C3/04 ,  C03C3/08

    CPC classification number: C03C8/06 ,  C03B17/02 ,  C03B23/025 ,  C03C1/04 ,  C03C3/091 ,  C03C3/115 ,  C03C4/00 ,  C03C4/005 ,  C03C17/02 ,  C03C2204/04 ,  C03C2218/13 ,  C03C2218/365

    Abstract: This invention relates to spontaneously opacifiable glasses containing fluorine and having as the principal opacifying phase an immiscible, or insoluble, fluorine containing glass; the opal is an alkali aluminosilicate glass with additions of divalent oxides, fluorine, and boric-oxide. These glasses are opacified by cooling the glass body from the melt to a temperature below about the opal liquidus thereof at a rate greater than about 2* C./minute so as to homogeneously separate an insoluble glassy opacifying phase.

    Abstract translation: 本发明涉及含氟的自发不透光玻璃，其主要不透明相是不混溶或不溶的含氟玻璃; 蛋白石是带有二价氧化物，氟和氧化硼的碱性铝硅酸盐玻璃。 通过将玻璃体从熔体中以大于约2℃/分钟的速率冷却至低于其蛋白石液相线的温度而使这些玻璃不透明，以均匀分离不溶性玻璃状不透明相。

    Barium flint ophthalmic glasses
    3.
    发明授权
    Barium flint ophthalmic glasses 失效
    钡火石眼镜

    公开(公告)号：US3902910A

    公开(公告)日：1975-09-02

    申请号：US44349574

    申请日：1974-02-19

    Applicant: CORNING GLASS WORKS

    Inventor： HARES GEORGE B ,  MORGAN DAVID W

    IPC: C03C3/07 ,  C03C3/072 ,  C03C3/074 ,  C03C3/08

    CPC classification number: C03C3/07 ,  C03C3/072 ,  C03C3/074

    Abstract: This invention relates to improved barium flint glasses particularly designed for production of segments or buttons for multifocal ophthalmic lenses. The glasses have refractive indices in the range of 1.64 to 1.71, corresponding dispersive indices (nu values) such that the nu value (V) is greater than 260 minus 133 times the refractive index, relatively low liquidus temperatures, and good chemical durability. The glasses consist essentially, in percent by weight, of 33-43% SiO2, 0-4% B2O3, 3343% SiO2 + B2O3, 4-9% Na2O, 0-4% K2O, 5-10% Na2O + K2O, 17-24% BaO, 0-3% CaO, 0-5% La2O3, 22-26% BaO + CaO + La2O3, 13-28% PbO, 2-5% ZnO, 15-30% PbO + ZnO, 2-4% TiO2, 3-6% ZrO2, and 6-9% TiO2 + ZrO2.

    Abstract translation: 本发明涉及特别设计用于生产多焦点眼科镜片的片段或按钮的改进的钡火石眼镜。 玻璃的折射率在1.64〜1.71的范围内，相应的色散指数（nu值）使得nu值（V）大于260减去133倍的折射率，相对低的液相线温度和良好的化学耐久性。 玻璃基本上以重量百分比计，33-43％SiO 2，0-4％B 2 O 3，33-43％SiO 2 + B 2 O 3，4-9％Na 2 O，0-4％K 2 O，5-10％Na 2 O + K 2 O ，17-24％BaO，0-3％CaO，0-5％La2O3，22-26％BaO + CaO + La2O3，13-28％PbO，2-5％ZnO，15-30％PbO + ZnO，2 -4％TiO 2，3-6％ZrO 2和6-9％TiO 2 + ZrO 2。

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