Inventors:
Bruce G. Aitken - Corning NY
Frank A. Annunziata - Horseheads NY
Roger F. Bartholomew - Painted Post NY
Mark A. Newhouse - Corning NY
Mark L. Powley - Campbell NY
Andrea L. Sadd - Corning NY
Assignee:
Corning Incorporated - Corning NY
International Classification:
C03C 332, C03C 410
Abstract:
This invention is directed to the production of transparent glasses exhibiting transmission far into the infrared regime of the radiation spectrum. The glasses consist essentially, in mole percent, of 42-55% CdF. sub. 2 and/or CdCl. sub. 2, 30-40% NaF and/or NaCl, 2-20% total of BaF. sub. 2 and/or BaCl. sub. 2 +KF and/or KCl, consisting of 0-15% BaF. sub. 2 and/or BaCl. sub. 2 and 0-7% KF and/or KCl, 1-12% total of at least one stabilizing metal halide selected from the group LiX, BeX. sub. 2, MgX. sub. 2, MnX. sub. 2, PbX. sub. 2, TlX, COX. sub. 2, and ZnX. sub. 2, and 0,005-0. 5% REX. sub. 3, wherein Re is at least one rare earth metal selected from the lanthanide series of rare earth metals and X is at least one halide selected from the group consisting of fluoride, chloride, and bromide. The preferred glasses contain at least 2% each of BaF. sub. 2 and/or BaCl. sub.