Particulate fluorescent material of (Y.sub.1-X" Eu.sub.x)203 an
Particulate fluorescent substance
Persistent phosphor
Phosphate base laser glasses
Phosphate fluorescent substance
Phosphate glass for use in the manufacture of ultra-short...
Phosphate glass useful in high power lasers
Phosphate glass useful in high power lasers
Phosphate neodymium glass for laser use
Phosphate treated silicate phosphor
Phosphor
Phosphor
Phosphor
Phosphor
Phosphor
Phosphor
Phosphor
Phosphor
Phosphor
Phosphor