High pressure mercury lamp

Details High pressure mercury lamp High pressure mercury lamp

1998-06-03

2000-05-09

Patel, Ashok

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

313642, 313571, H01J 1720

Patent

active

060608307

ABSTRACT:
A high pressure mercury lamp with an extremely high mercury vapor pressure and extremely high tube wall load in which the arc during operation is advantageously stabilized is achieved in a high pressure mercury lamp having a discharge vessel of fused silica glass which contains a pair of opposed tungsten electrodes, mercury in an amount at least equal to 0.16 mg/mm.sup.3 and a rare gas, and in which the discharge tube has a tube wall load at least equal to 0.8 W/mm.sup.2, by at least one metal halide with a metal having an ionization potential that is at most 0.87 times as high as the mercury ionization potential being added to the discharge tube in a range of from 2.times.10.sup.-4 to 7.times.10.sup.-2 .mu.mole/mm.sup.3.

REFERENCES:
patent: 4686419 (1987-08-01), Block et al.
patent: 5109181 (1992-04-01), Fischer et al.
patent: 5489819 (1996-02-01), Sakai et al.
patent: 5497049 (1996-03-01), Fischer

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