Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Polarizer or special ray transmission
Patent
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.
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patent: 4224074 (1980-09-01), Reade
patent: 4315186 (1982-02-01), Hirano et al.
DeMeo Palmer C.
General Electric Company
Jacob Fred
McDevitt John F.
Schlamp Philip L.
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