GLASS TRANSPARENT IN INFRA-RED SPECTRUM Russian patent published in 2005 - IPC

FIELD: optical fluoride glass transparent in infra-red spectrum; promising materials for infra-red optics.

SUBSTANCE: proposed glass is used for infrared-transmitting cores of optics fibers, optical devices, working bodies of lasers, optical amplifiers, planar waveguides and light-transforming units. Glass contains the following components, mole-%: InF₃, 25 to 60; BaF₂, 10 to 40; ZnF₂, 5 to 40 and BiF₃, 2.5 to 40. For varying physico-chemical parameters of glass it may additionally contain up to 20 mole-% of compounds selected from group LiF, NaF, KF and TlF and/or up to 35 mole-% of compounds selected from groups CdF₂, SrF₂, PbF₂, EuF₂ and/or up to 15 mole-% of compounds selected from group LaF₃, PrF₃, NdF₃, SmF₃, EuF₃, GdF₃, TbF₃, DyF₃, HoF₃, ErF₃, TmF₃, YbF₃,LuF₃, AlF₃, ScF₃, GaF₃, YF₃, UF₄.

EFFECT: extended range of fluoride glass materials; high refraction index; enhanced thermal resistance.

3 cl, 1 dwg, 1 tbl, 1 ex