C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 3/11 (2006.01) C03C 4/00 (2006.01) C03C 14/00 (2006.01)
Patent
CA 2106230
This invention is directed to a glass containing elongated silver halide crystals selected from the group consisting of AgCl, AgBr, AgI, and mixtures thereof which is capable of polarizing radiation in the visible portion of the radiation spectrum and which does not exhibit photochromism when exposed to radiation in the ultraviolet/ visible portions of the radiation spectrum, wherein the composition of the glass is essentially free of copper and includes an amount of CeO2 effective to retain the silver in the glass composition in the oxidized state.
'invention concerne un verre contenant des cristaux allongés d'un halogénure d'argent choisi parmi le groupe constitué d'AgCl, d'AgBr, d'AgI, et d'un mélange de ces derniers, qui est capable de polariser les rayonnements dans la partie visible du spectre de rayonnement et qui ne présente pas de photochromisme lorsqu'il est exposé au rayonnement dans les parties ultraviolette et visible du spectre de rayonnement, lequel verre est essentiellement exempt de cuivre et renferme une quantité de CeO2 suffisante pour garder à l'état oxydé l'argent présent dans la composition de verre.
Borrelli Nicholas F.
Lapp Josef C.
Morgan David W.
Corning Incorporated
Gowling Lafleur Henderson Llp
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