Optically transparent, optically stimulable glass composites for

Details Optically transparent, optically stimulable glass composites for Optically transparent, optically stimulable glass composites for

1997-04-29

1998-09-22

Westin, Edward P.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2504831, 2523014R, G01T 1115, G01T 1105

Patent

active

058118225

ABSTRACT:
An optically transparent and optically stimulable glass composite includes glass matrix that has both luminescent centers and trapping centers. The trapping centers store trapped charges and, in response to optical stimulation, release the charges resulting in recombination and light emission. In one embodiment, the invention is a glass matrix doped with an alkaline earth sulfide, Sm ions, and an additional dopant such as Eu ions and Ce ions. Alternatively, the dopants may be ZnS and Cu, Pb, or Mn ions. In another embodiment, Cu may be the sole dopant. Several different preparation methods, including diffusion techniques, are described for producing the doped glasses.

REFERENCES:
patent: 5119460 (1992-06-01), Bruce et al.
patent: 5531928 (1996-07-01), Karem et al.
patent: 5547807 (1996-08-01), Leblans et al.
patent: 5568497 (1996-10-01), Bishop et al.
patent: 5585640 (1996-12-01), Huston et al.

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