Radiant energy – Invisible radiation responsive nonelectric signalling – Luminescent device
Patent
1987-08-14
1989-03-14
Morgenstern, Norman
Radiant energy
Invisible radiation responsive nonelectric signalling
Luminescent device
427 64, 2523014S, 2523014H, 428690, 428691, H05B 3300, B05D 506, C09K 1108
Patent
active
048126608
ABSTRACT:
Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants and a fusible salt. The base material is an alkaline earth metal sulfide such as calcium sulfide. Lithium fluoride is used to enhance the interdiffusion of materials. Samarium and cerium sulfide are used as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. The material is then placed in a transparent binder and applied to a substrate, or deposited as a thin film directly on a substrate for different uses.
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Morgenstern Norman
Padgett Marianne L.
Quantex Corporation
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