OPTICAL GLASS Russian patent published in 2022 - IPC C03C3/155 

FIELD: optical technology.

SUBSTANCE: invention relates to the field of optical materials science, in particular to colorless optical glass with a high refractive index in the range of 1.91≤n_d≤2.02, a dispersion coefficient of 27≤ν_d≤36 and a reduced density (ρ<5.0 g/cm³), which can be used as a material for the manufacture of optical lenses and optical systems (photo and video lenses of ultra-high resolution, optical devices of the military-industrial complex, optics of the civilian segment, material for volumetric recording of waveguide light-conducting structures using local laser modification, etc.). The claimed optical glass contains the following components, wt. %: La₂O₃ 34-50; В₂O₃ 11-20; TiO₂ 4-10, CaO 0.5-4; ZnO 0,2-2,5; Nb₂O₅ 16-40; ZrO₂ 0-2; Y₂O₃ 1-5; Gd₂O₃ 5-10; Sb₂O₃ 0.2-2.0 and additionally contains Ga₂O₃ 0.5-5, WO₃ 0-5. The ratios CaO/ZnO =1.5-2.5 and La₂O₃/B₂O₃=2.5-4 ensure optimal resistance of glass to crystallization and the manufacturability of its cooking and production.

EFFECT: optical glass from this field of compositions has a high refractive index in combination with low density, low crystallization ability and environmental safety.

1 cl, 7 ex, 1 tbl