Communications apparatus using infrared-triggered phosphor for r

Details Communications apparatus using infrared-triggered phosphor for r Communications apparatus using infrared-triggered phosphor for r

1985-10-10

1987-11-10

Fields, Carolyn E.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2504831, 455619, G01T 111

Patent

active

047059524

ABSTRACT:
An infrared communications device includes a novel infrared-triggered phosphor which stores energy in the form of visible light of a first wavelength and releases energy in the form of visible light of a second wavelength when triggered by infrared light. Modulated infrared input signals produce modulated visible light output signals which are supplied through a photomultiplier to amplification and demodulation circuitry. The phosphor is a composition comprising an alkaline earth metal sulfide, rare earth dopants, and a fusible salt.

REFERENCES:
patent: 3066222 (1967-11-01), Poorman et al.
patent: 3610932 (1971-10-01), Morse et al.
patent: 3859527 (1975-01-01), Luckey
patent: 3959658 (1976-05-01), Ziemer et al.
patent: 4064066 (1977-12-01), Toshinai et al.
patent: 4236078 (1980-11-01), Kotera et al.

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