Red fluorescent lamp suitable for reprographic applications

Details Red fluorescent lamp suitable for reprographic applications Red fluorescent lamp suitable for reprographic applications

1989-04-24

1991-01-29

O'Shea, Sandra L.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313112, H01J 6138, H01J 6144

Patent

active

049889141

ABSTRACT:
A fluorescent lamp designed to emit light in the red region of the visible spectrum suitable for reprographic applications. The lamp includes a colored envelope (e.g., amber) which is capable of attenuating light below about 500 nanometers. A layer containing a single narrow-band phosphor having a peak emission in the wavelength region of from about 590 to 660 nanometers is disposed on the inner surface of the envelope. The phosphor layer may consist of a mixture the narrow-band phosphor and a predetermined amount of alumina. Preferably, the alumina by weight is within the range of from about 55 percent to about 95 percent by weight of the phosphor.

REFERENCES:
patent: 1971941 (1934-08-01), Pirvani
patent: 4691140 (1987-09-01), Sakakibara et al.

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