High intensity discharge lamp
A high-intensity discharge lamp and discharge vessel technology, which is applied to discharge lamps, gas discharge lamps, and parts of gas discharge lamps, etc., can solve problems such as serious attacks on quartz walls, and achieve the effect of promoting stability.
Inactive Publication Date: 2010-11-24
SIGNIFY HLDG BV
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Problems solved by technology
The disadvantage of the known lamps is that the emitted light is slightly greenish, the greenish tendency becoming more severe as the value of Tc increases
Another disadvantage is that the quartz wall of the discharge vessel can be severely attacked by the filler, especially Gd (gadolinium)
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The invention relates to a high intensity discharge lamp provided with a discharge vessel enclosing a discharge space comprising an ionizable filling including besides mercury a rare earth halide, which lamp emits during stable operation light with a color temperature Tc of at least 7000K. According to the invention the lamp of the type described in the opening paragraph is therefore characterized in that the rare earth of the rare earth halide comprises Tb or Tb and Dy.
Description
high intensity discharge lamp technical field The invention relates to a high-intensity discharge lamp provided with a discharge vessel enclosing a discharge space comprising an ionizable filling comprising, in addition to mercury, rare earth halides. The lamp emits light with a color temperature Tc of at least 7000K in stable operation. Background technique Such lamps are known as medium source rare earth (MSR) lamps and are used, for example, in stage lighting. In particular, these lamps are known to comprise Gd (gadolinium) as the metal halide filling. The discharge vessel of a known lamp has quartz walls. A disadvantage of the known lamp is that the emitted light has a slightly greenish tint, the greenish tendency becoming more severe as the value of Tc increases. Another disadvantage is that the quartz wall of the discharge vessel can be severely attacked by the filling, especially Gd (gadolinium). This situation is exacerbated as the wall load increases, and this...
Claims
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IPC IPC(8): H01J61/82H01J61/12
CPCH01J61/125H01J61/827
Inventor L·S·E·拉默兰特A·H·A·沙伦博格
Owner SIGNIFY HLDG BV