Electric lamp and discharge devices – With gas or vapor – Having a particular total or partial pressure
Patent
1995-05-01
1997-02-04
Oberley, Alvin E.
Electric lamp and discharge devices
With gas or vapor
Having a particular total or partial pressure
313639, 313642, H01J 1720
Patent
active
056002041
ABSTRACT:
A high-pressure sodium discharge lamp provided with a ceramic discharge vessel, in which sodium, mercury and xenon are present, of which the xenon is at a pressure at 300K of at least 26.7 kPa. The sodium and the mercury are present in a weight ratio Na/Hg which is at least 0.075 and at most 0.125. The lamp generates in the operating condition a spectrum, in which at a wavelength of 589.3 nm a self-absorption band is present, which is limited by spectral flanks each flank having a respective maximum. There is a wavelength difference .DELTA..lambda. of at least 3.5 nm and at most 6 nm between the maxima.
REFERENCES:
patent: 4025812 (1977-05-01), McVey
patent: 4260929 (1981-04-01), Jacobs et al.
patent: 4374339 (1983-02-01), Tielemans et al.
patent: 4418300 (1983-11-01), Otani et al.
patent: 5150017 (1992-09-01), Geens et al.
"Electric Discharge Lamps" By John F. Waymouth, pp. 196-198, Section 7.3, The M.I.T. Press, 1972.
High Pressure Mercury Vapour Lamps and Their Applications by Elenbaas, .COPYRGT. 1965 p. 124.
Jacobs Cornelis A. J.
Jansen Aldegondus W.
Stoffels Jan A. J.
Oberley Alvin E.
Richardson Lawrence O.
U.S. Philips Corporation
Wieghaus Brian J.
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