Internal lamp reflector

Details Internal lamp reflector Internal lamp reflector

1989-03-03

1990-10-23

Rowan, Kurt

Electric lamp or space discharge component or device manufacturi

Process

Combined, e.g., with shaping of lamp or device envelope

313113, 134 41, H01J 900

Patent

active

049648292

ABSTRACT:
A 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
patent: 3523207 (1970-08-01), Johansen
patent: 4256602 (1981-03-01), McLaughlin
patent: 4623815 (1986-11-01), Krieg
patent: 4668421 (1987-05-01), Dollman

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