GLASS Russian patent published in 2007 - IPC C03C3/64 C03C4/12 

FIELD: optics and glassmaking industry.

SUBSTANCE: invention relates to compositions of glasses luminescing when exposed to x-ray irradiation and can be used in control instrumentation, in industrial defectoscopy and intrascopy, and in dosimetric systems based on transmittance and luminescence of various glasses. Task of invention was to provide a glass capable of transforming x-ray emission into visual-range emission while simultaneously preserving luminescent glass transparency region. Such effect is achieved with glass containing, wt %: SiO₂ 37.67-40.17, B₂O₃ 34.08-34.59, Al₂O₃ 16.14-17.14, Na₂O 9.11-10.06; and also Tb₄O₇ in amount 10% above 100% and GdO on quantity 50% of the content of terbium oxide.

EFFECT: achieved x-rays-to-visual rays transformation.

2 tbl