COLOR FILTER GLASS Russian patent published in 2006 - IPC C03C3/253 

FIELD: glassmaking industry.

SUBSTANCE: invention provides color filter glass for use in optic-laser instrumentation engineering for filters absorbing in UV spectrum region, which glass contains following components, wt %: PbO 63.5-78,39, TeO₂ 5.0-27,4, GeO₂ 3.0-13.0, B₂O₃ 6.0-9.05, La₂O₃ 0.01-0.1. Glass is characterized by refraction factor >1.8 and linear expansion factor 110-115 x 10^-7 K^-1. Glass synthesis temperature is 900-950°C.

EFFECT: achieved complete nontransparence in UV region and up to 400 nm with sharp edge in optical absorbance and increased light transmission in wavelength range 450-500 nm.

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