Internal lamp reflector

Details Internal lamp reflector Internal lamp reflector

1988-08-15

1990-05-08

O'Shea, Sandra

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313580, 362296, H01K 126, H01K 130

Patent

active

049241346

ABSTRACT:
An improved projector lamp with an internal reflector may be made by forming the reflector from pure aluminum, or an aluminum alloy not including amounts of vaporizable materials. Anodized aluminum is not used. A pure aluminum reflector is mechanically polished and chemically etched to attain a high level of reflectivity. The quality of the surface finish is retained by enclosing the reflector in an oxygen free lamp. The high purity aluminum acts as a getter for oxygen, and other detrimental contaminants, thereby tending to extend the lamp life and maintain lamp output. Since aluminum is lighter weight than the previous reflector materials, the lamps do not suffer as much breakage during manufacture and shipping.

REFERENCES:
patent: 2979634 (1961-04-01), Peek et al.
patent: 3523207 (1970-08-01), Johansen et al.
patent: 4623815 (1986-11-01), Krieg et al.

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