Incandescent lamp with infrared reflecting-visible energy transm

Details Incandescent lamp with infrared reflecting-visible energy transm Incandescent lamp with infrared reflecting-visible energy transm

1978-10-18

1981-02-03

Demeo, Palmer C.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313113, 313271, 313315, H01K 118, H01K 132

Patent

active

042491010

ABSTRACT:
An incandescent electric lamp having an envelope and means for reflecting infrared energy back to the filament to increase its operating temperature while transmitting visible energy. The envelope is shaped to reflect the infrared energy back to the filament and the filament is purposely misaligned with respect to the optical center of the envelope so that the infrared energy impinges on the filament after two reflections from the envelope wall.

REFERENCES:
patent: 1239371 (1917-09-01), Evans
patent: 1342894 (1920-06-01), Bugbee
patent: 2121314 (1938-06-01), Birdseye et al.
patent: 3209188 (1965-09-01), Freeman
patent: 3209192 (1965-09-01), Decker
patent: 3253178 (1966-05-01), Fantur
patent: 3974370 (1976-08-01), Pearson
patent: 4039878 (1977-08-01), Eijkelenboom et al.

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