Filtered fluorescent lamp

Details Filtered fluorescent lamp Filtered fluorescent lamp

1975-06-02

1976-03-30

Smith, Alfred E.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313112, 313220, 313493, H01J 6140, H01J 170

Patent

active

039477193

ABSTRACT:
A light filtering system for improving the spectral output from fluorescent lamps. A filter placed within the lamp envelope between the phosphor coating and the arc discharge path between the lamp electrodes, absorbs mercury arc radiation in the visible range while passing arc radiation in the ultraviolet range to excite the phoshor coating and produce visible light emitted through the outer envelope.

REFERENCES:
patent: 2205809 (1940-06-01), Breadner et al.
patent: 2238784 (1941-04-01), Scott et al.
patent: 2355258 (1941-08-01), Biggs et al.
patent: 2413940 (1947-01-01), Bickford
patent: 3148300 (1964-09-01), Graff

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