Low expansion, multiband transmitting glasses and glass-ceramics

摘要

Compositions of metal oxides which may be melted and cooled to produce glasses are disclosed. The glasses may be heat treated to produce glass-ceramics. The glasses have good transmittances for electromagnetic radiation in the ultraviolet, infrared and visible spectra, while the glass-ceramics have good transmittances of infrared radiation. Other physical properties make these materials desirable for purposes such as radomes.