Oxide glass showing long afterglow and accelerated phosphorescence
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United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Nov 30, 1999
filing date -
Apr 1, 1998
priority date (Note) -
Expired
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Abstract
The object of the present invention is to provide an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, whereby energy can be accumulated by radiation excitation, for example, by .gamma.-rays, X-rays, UV-rays, etc. and light emission can be continued for a long time even after stopping the excitation. That is, the present invention relates to an oxide glass capable of exhibiting a long lasting afterglow and photostimulated luminescence, characterized by a constitutional composition comprising, at least, terbium oxide (Tb.sub.2 O.sub.3) or manganese oxide (MnO), gallium oxide (Ga.sub.2 O.sub.3) or aluminum oxide (Al.sub.2 O.sub.3), alkali metal oxide or alkaline earth metal oxide and boron oxide (B.sub.2 O.sub.3) or silicon oxide (SiO.sub.2) or zinc oxide (ZnO).
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