High-pressure gas discharge lamp

Details High-pressure gas discharge lamp High-pressure gas discharge lamp

2005-01-25

2005-01-25

Glick, Edward J. (Department: 2882)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S637000, C313S643000

Reexamination Certificate

active

06847167

ABSTRACT:
The high-pressure gas discharge lamp (1) comprises a lamp vessel (2) having a wall (3) which is exposed to a wall load of at least 30 W/cm2during operation of the lamp, and a discharge space (4) in which a pair of electrodes (5) is disposed. The discharge space (4) has a filling which comprises mercury, argon, and halides (not fluorides) of tin and indium, to which filling an alkali metal halide is added, the alkali metal being potassium, rubidium, or cesium, and the halide being chlorine, bromine, or iodine. The high-pressure discharge lamp (1) according to the invention has an improved resistance against corrosion and crystallization of the quartz glass wall (3).

REFERENCES:
patent: 4001626 (1977-01-01), Drop et al.
patent: 4935668 (1990-06-01), Hansler et al.
patent: 5479065 (1995-12-01), Sugimoto et al.
patent: 5592050 (1997-01-01), Higashi et al.
patent: 5965984 (1999-10-01), Horiuchi et al.
patent: 6069456 (2000-05-01), Fromm et al.
patent: 2455277 (1975-06-01), None
patent: 0605248 (1994-07-01), None
http://www.webelements.com/ Copyright 1993-2003 Mark Winter [The University of Sheffield and WebElements Ltd, UK].

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