Method to reduce color temperature variation in metal halide arc

Details Method to reduce color temperature variation in metal halide arc Method to reduce color temperature variation in metal halide arc

1986-12-18

1989-07-25

Little, Willis

Receptacles

Envelope for electric lamp or similar device

Tv tube

313634, H01J 6130

Patent

active

048504998

ABSTRACT:
The present invention is directed to a method for the elimination of end pockets in metal halide arc tube envelopes (or other irregularities) in order to improve the color stability thereof.
The present invention is also directed to the improved lamps having reduced or substantially eliminated end pockets.
The magnitude of this improvement will increase with decreasing arc tube size, since in smaller arc tubes, the tube ends represent a larger fraction of the overall inner surface of the device.

REFERENCES:
patent: 3384781 (1968-05-01), Holle
patent: 4161672 (1979-07-01), Cap et al.
patent: 4396857 (1983-08-01), Danko
patent: 4498027 (1985-05-01), Karlotski et al.
patent: 4724361 (1988-02-01), Wada et al.

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