Inert gas short arc discharge lamp

A short-arc discharge lamp and inert gas technology, which is applied to parts of gas discharge lamps, high-pressure discharge lamps, etc., can solve problems such as changes in the ignition characteristics of discharge lamps, and achieve the effect of increasing working pressure

Inactive Publication Date: 2011-11-09
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, however, the ignition behavior of the discharge lamp changes negatively, since the required ignition voltage (cold ignition and hot re-ignition) increases

Method used

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Examples

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Embodiment Construction

[0022] figure 1 A view shows a section through an exemplary embodiment of a noble gas short-arc discharge lamp designed for direct current operation (DC) with a power consumption of 450 W. The lamp has a discharge vessel 1 made of glass, in which an anode 2 and a cathode 3 are arranged at a distance from one another. The two electrodes 2 , 3 are held in the discharge vessel 1 by corresponding electrode rods 4 , 6 . For its part, the electrode rods are arranged in the corresponding end regions of the lamp or are guided out in a gas-tight manner in order to be able to be connected to an external power supply (not shown). The discharge vessel 1 is filled with pure xenon at a cold filling pressure of 10 bar. This corresponds to the cold fill pressure of a conventional 450W short-arc xenon lamp.

[0023] In the region of the anode 2 , the outer side of the discharge vessel 1 is provided with a coating 8 . Here, the coating 8 alternately consists of silicon dioxide (SiO 2 ) lay...

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Abstract

The invention relates to an inert gas short arc discharge lamp (1), having a discharging container and electrodes (2, 3) disposed in the container. The discharging container has coatings (8) for reflecting infrared radiations and thermal insulation.

Description

technical field [0001] The invention is based on an inert gas short-arc discharge lamp according to the preamble of claim 1 . [0002] The term noble gas short-arc discharge lamp here denotes a short-arc discharge lamp with a discharge vessel made of quartz, which is filled exclusively with an inert gas or an inert gas mixture. Such lamps are usually operated with direct current or pulsed direct current. The lamp is suitable for various fields of use, especially also for cinema projection, effect spotlights (Effektscheinwerfer) and search spotlights (Suchscheinwerfer) as well as microscopes and endoscopes. Background technique [0003] Measures known from the prior art for increasing the luminous intensity of noble gas short-arc discharge lamps (AC, DC, pulsed operation) are, for example, increasing the pressure in the discharge vessel. In this case, however, the ignition behavior of the discharge lamp changes negatively, since the required ignition voltage (cold ignition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/35H01J61/16
CPCH01J61/35H01J61/86
Inventor 克里斯托福罗斯·卡扎齐斯沃尔夫冈·塞茨
Owner OSRAM GMBH
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