Energy-efficient incandescent reflector lamp

Details Energy-efficient incandescent reflector lamp Energy-efficient incandescent reflector lamp

1981-11-09

1988-03-01

Moore, Daivd K.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313634, H01K 128

Patent

active

047288485

ABSTRACT:
An incandescent lamp of the reflector type has an exit window on which a filter coating is located. The filter coating reflects infrared radiation and transmits visible radiation. The clamp also has a reflector which is opposed to the filter coating and which reflects both infrared and visible radiation. The filter coating and the reflector have surfaces which are parabolic, confocal, and orthogonal. The filament passes through the focus and is elongated along the focal axis of the lamp. Infrared radiation emitted by the filament from the focus is reflectd back to it after two reflections, of which one reflection will be off the filter coating and of which the other will be off the reflector. A large part of the light produced by the lamp is collimated.

REFERENCES:
patent: 2818521 (1957-12-01), Myers
patent: 3010045 (1961-11-01), Plagge et al.
patent: 4039878 (1977-08-01), Eijkelenboom et al.
patent: 4160929 (1979-07-01), Thorington et al.
patent: 4227113 (1980-10-01), Walsh

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