Germanium-containing glass of high infrared transmission and low

Details Germanium-containing glass of high infrared transmission and low Germanium-containing glass of high infrared transmission and low

1981-12-30

1983-05-24

Fisher, Richard V.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65 32, 65134, 501 43, 501904, C03C 312, C03C 330

Patent

active

043851282

ABSTRACT:
This invention is directed to the production of glasses having a density of less than 3.26 g/cm.sup.3, a .beta..sub.OH value less than 0.030 mm.sup.-1, and, in a thickness of 2 mm, a transmission of at least about 80% at a wavelength of 4.0 microns and at least about 50% at a wavelength of 5 microns, which have base compositions within the alkali metal oxide-CaO-Al.sub.2 O.sub.3 -GeO.sub.2 -F and/or Cl field consisting essentially, expressed in terms of weight percent on the oxide basis, of

REFERENCES:
patent: 3119703 (1964-01-01), Cleek et al.
patent: 3531305 (1970-09-01), Dumbaugh, Jr.
patent: 3745032 (1973-07-01), Miller et al.
patent: 3769047 (1973-10-01), Dumbaugh, Jr.
patent: 3911275 (1975-10-01), Dumbaugh, Jr.

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