The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2002
Filed:
Nov. 30, 1999
Masaaki Yamazaki, Saitama-ken, JP;
Yoshinori Yamamoto, Saitama-ken, JP;
Naruhito Sawanobori, Saitama-ken, JP;
Shinobu Nagahama, Saitama-ken, JP;
Sumita Optical Glass, Inc., Saitama-ken, JP;
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 &ggr;-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 O ) or manganese oxide (MnO), gallium oxide (Ga O ) or aluminum oxide (Al O ), alkali metal oxide or alkaline earth metal oxide and boron oxide (B O ) or silicon oxide (SiO ) or zinc oxide (ZnO).