Electric lamp with neodymium oxide vitreous coating

Details Electric lamp with neodymium oxide vitreous coating Electric lamp with neodymium oxide vitreous coating

1981-06-24

1983-07-26

Demeo, Palmer C.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313116, H01K 132

Patent

active

043956530

ABSTRACT:
Selective light absorption coatings are provided for electric lamps which comprise a transparent vitreous frit containing neodymium oxide to selectively absorb radiation in the green and yellow wavelength region of the visible spectrum while transmitting the remaining visible radiation. A preferred vitreous frit is zinc borosilicate glass containing neodymium oxide which can be fired as an enamel coating on the exterior surface of the soda-lime glass envelope customarily employed for incandescent lamps. In a different preferred embodiment, the transparent vitreous frit containing neodymium oxide is admixed with an inorganic particulate filler and said mixture electrostatically deposited on the interior surface of the lamp glass envelope.

REFERENCES:
patent: 1900463 (1933-03-01), Pipkin
patent: 2660531 (1953-11-01), Fraser et al.
patent: 2877139 (1959-03-01), Hyde et al.
patent: 3005722 (1961-10-01), Cerulli
patent: 3320460 (1967-05-01), Bouchard et al.
patent: 4081709 (1978-03-01), Collins et al.
patent: 4224074 (1980-09-01), Reade
patent: 4315186 (1982-02-01), Hirano et al.

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