Incandescent lamp with selective color filter

Details Incandescent lamp with selective color filter Incandescent lamp with selective color filter

1980-08-01

1982-12-28

Lechert, Jr., Stephen J.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

362 2, 362255, 362293, H01J 516

Patent

active

043664075

ABSTRACT:
An incandescent lamp utilizing a transparent heat mirror coating on the lamp envelope for transmitting radiation in a selected portion of the visible range to produce a desired color and reflecting infrared thermal radiation back to the filament for increasing its temperature and thereby increasing its efficiency. The coating is preferably of the etalon type having a layer of an insulating material sandwiched between two layers of metal.

REFERENCES:
patent: 3312814 (1967-04-01), Reading

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