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    • 8. 发明公开
    • Method for making infrared polarizing glasses
    • Verfahren zur Herstellung infrarot polarisierenderGläser。
    • EP0384555A1
    • 1990-08-29
    • EP90300038.8
    • 1990-01-03
    • Corning Incorporated
    • Jones, Kelly EvanNoll, Frederick Ernest
    • C03C4/06C03B32/00
    • C03C3/11C03C4/06
    • This invention is directed to the preparation of glass articles exhibiting a relatively broad band of high contrast polarizing properties in the infrared region of the radia­tion spectrum from glasses containing silver halide particles selected from the group consisting of AgCl, AgBr, and AgI. The inventive method comprises the following five general steps:

      (a) melting a batch for a glass containing silver and at least one halide selected from the group consisting of chloride, bromide, and iodide;
      (b) cooling and shaping said melt into a glass article of a desired configuration;
      (c) subjecting said glass article to a temperature at least above the strain point, but not in excess of 75°C above the softening point of the glass, for a sufficient length of time to cause the generation of silver halide particles therein selected from the group consisting of AgCl, AgBr, and AgI, said particles ranging in size between about 200-5000Å;
      (d) elongating said glass article under stress at a temperature above the annealing point, but below that where said glass exhibits a viscosity of about 10⁸ poises, such that said silver halide particles are elongated to an aspect ratio of at least 5:1 and aligned in the direction of the stress; and, thereafter,
      (e) exposing said elongated glass article to a reducing environment at a pressure greater than atmospheric pressure and at a temperature above about 250°C, but no higher than about 25°C above the annealing point of the glass, for a period of time sufficient to develop a reducing surface layer on said glass article having a thickness of at least 10 microns wherein at least a portion of said elongated silver halide particles are reduced to elemental silver particles having aspect ratios greater than 2:1 which are deposited in and/or upon said elongated particles.

      The single figure illustrates the improved contrast and bandwidth achieved by the process (curves B, C and D).
    • 本发明涉及在含有选自AgCl,AgBr和AgI的卤化银颗粒的玻璃的辐射光谱的红外区域中具有相对宽带的高对比度偏振特性的玻璃制品的制备。 本发明的方法包括以下五个一般步骤:(a)熔化含有银和至少一种选自氯化物,溴化物和碘化物的卤化物的玻璃的批料; (b)将所述熔体冷却和成形为所需构型的玻璃制品; (c)使所述玻璃制品至少高于应变点的温度,但不超过玻璃软化点的75℃,持续足够长的时间以引起其中选出的卤化银颗粒 由AgCl,AgBr和AgI组成的组,所述颗粒的尺寸范围为约200-5000安培; (d)在高于退火点的温度下在应力下拉伸所述玻璃制品,但低于所述玻璃的粘度为约10 8泊的温度,使得所述卤化银颗粒被拉长至至少5的纵横比 :1并在应力方向对齐; 然后(e)将所述细长玻璃制品暴露于压力大于大气压的压力下,并在高于玻璃退火温度的约250℃,但不高于约25℃的温度下, 足以在所述玻璃制品上形成具有至少10微米厚度的还原表面层的时间段,其中所述细长卤化银颗粒的至少一部分被还原成具有高于2:1的纵横比的元素银颗粒,它们是 沉积在所述细长颗粒中和/或之上。 单个图示出了通过该过程(曲线B,C和D)实现的改善的对比度和带宽。
    • 10. 发明公开
    • Lightly tinted glasses of variable transmission
    • LeichtgefärbteGläsermit einerveränderlichenDurchlässigkeit。
    • EP0252723A1
    • 1988-01-13
    • EP87306008.1
    • 1987-07-08
    • Corning Glass Works
    • Prassas, Michel
    • C03C4/06C03C3/093
    • C03C4/06C03C3/093
    • This invention relates to the production of lightly tinted, photochromic glasses having base compositions consisting essentially, in weight percent, of


      Glass color can be adjusted by introducing in excess of the above base composition, at least one of the following colorants in the indicated proportions of
    • 本发明涉及生产具有基本组成的基本组合物的轻质着色的光致变色玻璃,其重量百分比可以通过超过上述基础组合物引入至少一种以下着色剂来调节。 指示比例 a