Mercury-free discharge lamp

Details Mercury-free discharge lamp Mercury-free discharge lamp

1982-07-26

1985-01-08

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315267, 313637, 313638, H05B 4116, H05B 4124

Patent

active

044928980

ABSTRACT:
An ultraviolet light source includes a volume filled with a dose of AlCl.sub.3 and an inert gas. No mercury is used. During electrical discharge excited states of AlCl.sub.3, AlCl.sub.2, and AlCl emit light, with AlCl having a broad ultraviolet emission peaking at about 261.4 nm. The source may be energized with or without internal electrode. Phosphors may be employed to convert the ultraviolet to visible light. The lamp's envelope may be aluminosilicate coated quartz.

REFERENCES:
patent: 3319119 (1967-05-01), Rendina
patent: 3484640 (1969-12-01), Johnson
patent: 3586898 (1971-06-01), Speros et al.
patent: 4158789 (1979-06-01), Scholz et al.
patent: 4266167 (1981-05-01), Proud et al.
Muck et al., Quantitative Radiation Measurement of a Pure Aluminum Chloride Plasma, 11th ICPIG, Prague, 1973.
Speros et al. Thermodynamic and Kinetic Considerations Pertaining to Molecular Arcs, High Temperature Science, vol. 4, No. 2, Apr. 1972.

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