Selective color filter

Details Selective color filter Selective color filter

1984-01-10

1987-02-24

Arnold, Bruce Y.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

350166, 313112, 313113, G02B 522, G02B 528

Patent

active

046452907

ABSTRACT:
A filter for use in 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 infra-red radiation back to the filament for increasing its temperature and thereby increasing its efficiency. The coating is preferably of the insulator/metal/inculator type having a layer of a metal sandwiched between two layers of an insulating material.

REFERENCES:
patent: Re27743 (1972-09-01), Mauer
patent: 4017661 (1977-04-01), Gillery
patent: 4160929 (1979-07-01), Thorington et al.
patent: 4364324 (1982-08-01), Yoldas
patent: 4368945 (1983-01-01), Fujimori et al.
patent: 4556599 (1985-12-01), Sato et al.

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