Reprographic metal halide lamps having long life and maintenance

Details Reprographic metal halide lamps having long life and maintenance Reprographic metal halide lamps having long life and maintenance

1989-03-10

1991-05-07

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

313571, 313639, H01J 6118, H01J 6122

Patent

active

050139681

ABSTRACT:
Metal halide vapor arc lamps for reprographic and projection processes emitting in the blue, green and red bands with excellent primary color separation and having long life and lumen maintenance contain mercury, zinc, indium, lithium, thallium, a halogen and a rare earth metal such as lanthanum, scandium or dysporsium in the arc tube.

REFERENCES:
patent: 3234421 (1966-02-01), Reiling
patent: 3259777 (1966-07-01), Fridrich
patent: 3445719 (1969-05-01), Thouret et al.
patent: 3840767 (1974-10-01), Lake
patent: 3876895 (1975-04-01), Lake
patent: 3919581 (1975-11-01), Datta
patent: 3982154 (1975-09-01), Mize et al.
patent: 4528478 (1985-07-01), Rothwell, Jr. et al.
patent: 4677343 (1987-06-01), Hick

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