Metal halide lamp and lighting device

Details Metal halide lamp and lighting device Metal halide lamp and lighting device

2007-06-19

2007-06-19

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S638000, C313S640000

Reexamination Certificate

active

10963215

ABSTRACT:
A metal halide lamp comprises a refractory, light-transmitting airtight container defining therein a discharge space with an internal volume of not more than 0.1 cc, electrodes sealed in the container, opposing each other with a distance of not more than 5 mm interposed, and a discharge medium sealed in the container and including a metal halide material and a rare gas. The metal halide includes first and second halide materials. The first halide material contains scandium (Sc) and sodium (Na) halides. The second halide material contains at least one of indium (In) and zinc (Zn) halides. The discharge medium contains substantially no mercury. The load on the wall of the container in a stable state is 50 W/cm2or more. A/B≦0.21 where A represents the intensity of an impurity chromium (Cr) spectrum in lighting spectra, and B represents the intensity of a scandium (Sc) spectrum.

REFERENCES:
patent: 6353289 (2002-03-01), Ishigami et al.
patent: 2002/0158580 (2002-10-01), Uemura et al.
patent: 1154455 (2001-11-01), None
patent: 1339090 (2003-08-01), None
patent: 11238488 (1999-08-01), None
Feb. 2, 2005 official Communication and European Search Report in connection with corresponding European Patent Appl. No. EP 04 25 6942 (Exhibit B).

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