Ellipsoidal envelope for incandescent lamp with infrared energy

Details Ellipsoidal envelope for incandescent lamp with infrared energy Ellipsoidal envelope for incandescent lamp with infrared energy

1981-05-18

1983-03-01

Nelms, David C.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313113, H01K 114

Patent

active

043756050

ABSTRACT:
An incandescent electric lamp having a coating to reflect infrared energy back to the filament to raise its operating temperature in which the envelope is shaped as an ellipsoid and the filament and envelope have a relationship to reduce losses due to aberration and to produce a more uniform temperature distribution along the filament.

REFERENCES:
patent: 4160929 (1979-07-01), Thorington et al.

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