Hot-pressed fluoride glasses
    162.
    发明授权
    Hot-pressed fluoride glasses 失效
    热压氟化物眼镜

    公开(公告)号:US4388097A

    公开(公告)日:1983-06-14

    申请号:US267934

    申请日:1981-05-28

    Abstract: Hot pressing of fluoride glasses is provided. These glasses are synthesized from ZrF.sub.4 -BaF.sub.2 and HfF.sub.4 -BaF.sub.2 systems. Hot pressing rough blanks in a closed die made of hard, polished, optically-figured material, such as cobalt-bonded tungsten carbide, is done by pressing the glasses at a temperature between that of the softening point of the glass and its crystallization temperature and at a pressure sufficient to cause flow of the glass at the pressing temperature. As a consequence, mechanical polishing steps on all glass surfaces is eliminated, thereby minimizing surface contamination.

    Abstract translation: 提供氟化玻璃的热压。 这些玻璃由ZrF4-BaF2和HfF4-BaF2系统合成。 通过在玻璃的软化点与其结晶温度之间的温度下压制眼镜,在由硬的,抛光的,光学成型的材料(例如钴结合的碳化钨)制成的封闭模具中热压粗毛坯, 在足以在压制温度下使玻璃流动的压力下。 因此,消除了所有玻璃表面上的机械抛光步骤,从而最小化表面污染。

    Manufacture of clad glass pipe for optical fiber transmitting infrared ray
    169.
    发明专利
    Manufacture of clad glass pipe for optical fiber transmitting infrared ray 失效
    用于光纤传输红外线的玻璃管的制造

    公开(公告)号:JPS5738335A

    公开(公告)日:1982-03-03

    申请号:JP10926080

    申请日:1980-08-11

    CPC classification number: C03B37/01268 C03B2201/82

    Abstract: PURPOSE:To obtain a clad glass pipe for an optical fiber transmitting infrared rays by fixing a quartz glass pipe to the outer frame of a metallic mold splittable into a plurality of segments and having a cylindrical hollow part, pouring molten fluoride glass in the gap between the frame and the pipe, and slowly cooling the glass after annealing. CONSTITUTION:A thin-walled glass pipe 7 with a high m.p. is fixed at the central axial part of a mold having outer frames 1, 1' splittable into a plurality of segments and forming a cylindrical hollow part 4, and after preheating the mold to a temp. close to the transition temp. of fluoride glass, molten fluoride glass is poured in the gap between the pipe 7 and the frames 1, 1'. The mold is then kept at a temp. several-several 10 deg.C below the transition temp. of the fluoride glass to anneal the glass, and it is slowly cooled. After the cooling the frames 1, 1' are detached to take out the fluoride glass formed in the interior. The internal thin-walled glass pipe 7 is scraped away.

    Abstract translation: 目的:通过将石英玻璃管固定在可分割成多个段的金属模具的外框架上并具有圆柱形中空部分,获得用于透射红外线的光纤的复合玻璃管,将熔融氟化物玻璃在 框架和管子,退火后缓慢冷却玻璃。 构成:薄壁玻璃管7,高熔点 固定在具有可分成多个段的外框架1,1'的模具的中心轴向部分上,并形成圆柱形中空部分4,并且在将模具预热至温度后, 接近过渡温度 的氟化物玻璃,将熔融氟化物玻璃倒在管7和框架1,1'之间的间隙中。 然后将模具保持在温度。 低于转变温度几十摄氏度。 的氟化物玻璃退火玻璃,并缓慢冷却。 在冷却之后,拆卸框架1,1'以取出形成在内部的氟化物玻璃。 内部薄壁玻璃管7被刮掉。

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