Glass composition suitable for use in a fluorescent lamp, tube and lamp
envelope manufactured from said glass composition, and fluorescent lamp
having a lamp envelope manufactured from said glass composition
    12.
    发明授权
    Glass composition suitable for use in a fluorescent lamp, tube and lamp envelope manufactured from said glass composition, and fluorescent lamp having a lamp envelope manufactured from said glass composition 失效
    适用于由所述玻璃组合物制造的荧光灯,管和灯壳的玻璃组合物,以及具有由所述玻璃组合物制成的灯泡的荧光灯

    公开(公告)号:US4666871A

    公开(公告)日:1987-05-19

    申请号:US681465

    申请日:1984-12-14

    摘要: A new type of glass, for example for use as a TL-envelope glass which as regards phosphor poisoning and Hg penetration has better properties than the present TL-envelope glasses. Phosphor poisoning occurs in particular upon fusing electrodes and bending and severing and bridging, respectively, during the manufacture of SL and PL lamps.Phosphor poisoning is controlled by incorporating little or no Na.sub.2 O in the glass. In order to nevertheless reach good processing properties, a combination of Li.sub.2 O and K.sub.2 O is used in the glass. The addition of only Li.sub.2 O or only K.sub.2 O does not result in a suitable glass.Hg penetration is controlled by the presence of a large quantity of alkaline earth metal oxides in the glass.The glass according to the invention has a good light transmission. A lamp comprising a lamp envelope of a glass according to the invention shows only a small luminous decline during operation of the lamp.

    摘要翻译: 例如,用作磷光体中毒和Hg穿透的TL-包层玻璃的新型玻璃比目前的TL-信封眼镜具有更好的性能。 磷光体中毒特别是在SL和PL灯的制造过程中分别在熔断电极和弯曲和切断和桥接时发生。 荧光粉中毒是通过在玻璃中加入很少或不含Na2O来控制的。 为了达到良好的加工性能,在玻璃中使用Li2O和K2O的组合。 仅添加Li2O或仅K2O不会导致合适的玻璃。 通过在玻璃中存在大量的碱土金属氧化物来控制Hg渗透。 根据本发明的玻璃具有良好的透光性。 包括根据本发明的玻璃的灯壳的灯在灯的操作期间仅显示小的发光衰减。

    Germanium-free optical fibers having large numerical apertures
    13.
    发明授权
    Germanium-free optical fibers having large numerical apertures 失效
    具有大数值孔径的无锗光纤

    公开(公告)号:US4573762A

    公开(公告)日:1986-03-04

    申请号:US508429

    申请日:1983-06-27

    CPC分类号: C03C13/046 G02B6/02

    摘要: An optical fiber of germanium-free, multicomponent glasses has a core glass which has the molecular composition: SiO.sub.2 : 57.5-65%; (ZrO.sub.2 +1/2Y.sub.2 O.sub.3): 0-5%; (MgO+CaO+SrO+BaO+ZnO): 12.5-27.5 where MgO: 0-5%, CaO: 0-10%, SrO: 0-7.5%, BaO: 0-15% ZnO: 0-20%, and in which if no BaO is present, the ZnO content is 12.5-20%, and if no ZnO is present, the BaO content is 5-15%, and (Li.sub.2 O+Na.sub.2 O+K.sub.2 O): 10-25%. The core glass has a K.sub.2 O content which is preferably smaller than half of the total alkali metal oxide content. The cladding glass consists of a silicate glass or a borosilicate glass having a refractive index which is at least 2% lower than the refractive index of the core glass. The viscosity of the cladding glass at the processing temperature is 0.5 to twice the viscosity of the core glass expressed in Pa.s.

    摘要翻译: 无锗的多组分玻璃的光纤具有芯玻璃,其分子组成为:SiO2:57.5-65%; (ZrO 2 + 1 / 2Y 2 O 3):0-5% (MgO + CaO + SrO + BaO + ZnO):12.5-27.5其中MgO:0-5%,CaO:0-10%,SrO:0-7.5%,BaO:0-15%ZnO:0-20% 如果不存在BaO,ZnO含量为12.5〜20%,如果不存在ZnO,则BaO含量为5〜15%,(Li 2 O + Na 2 O + K 2 O):10〜25%。 核心玻璃的K 2 O含量优选小于总碱金属氧化物含量的一半。 包层玻璃由折射率比核心玻璃的折射率低至少2%的硅酸盐玻璃或硼硅酸盐玻璃组成。 包层玻璃在加工温度下的粘度是以Pa.s表示的芯玻璃的粘度的两倍。

    Optical fiber of the graded index type and method of producing same
    14.
    发明授权
    Optical fiber of the graded index type and method of producing same 失效
    分级指数型光纤及其制造方法

    公开(公告)号:US4439008A

    公开(公告)日:1984-03-27

    申请号:US387993

    申请日:1982-06-14

    CPC分类号: C03C13/046

    摘要: An optical fiber of the graded index type consisting of a glass having predominantly the composition 60-70 mole % SiO.sub.2, 15-30 mole % alkali metal oxides, and 10 to 15 mole % MgO in combination with at least one oxide selected from the group formed by CaO, SrO, BaO and ZnO. The impurity content of the fiber is less than 0.01 ppm. In the fiber the MgO content increases from the axis of the fiber to the circumference of the fiber. The oxide or the other oxides, having cations which can be exchanged for the magnesium cation, decrease to a corresponding extent in this direction.

    摘要翻译: 梯度折射率型的光纤由主要为组成为60-70摩尔%SiO 2,15-30摩尔%碱金属氧化物和10-15摩尔%MgO的玻璃组成的玻璃与至少一种选自以下的氧化物组合 由CaO,SrO,BaO和ZnO形成。 纤维的杂质含量小于0.01ppm。 在纤维中,MgO含量从纤维的轴线增加到纤维的周长。 可以与镁阳离子交换的具有阳离子的氧化物或其它氧化物在该方向上降低到相应的程度。