A thoriated tungsten electrode xenon lamp is a specific type of xenon lamp, in which the thoriated tungsten electrode is its key component. Xenon lamps, as an arc discharge lamp, can be divided into long arc xenon lamps and short arc xenon lamps according to their structure and usage characteristics.
In a long arc xenon lamp, the outer shell is a cylindrical quartz glass tube, with a rod-shaped thoriated tungsten electrode sealed at both ends, and the tube is filled with high-purity xenon gas. This lamp has the characteristics of high power, white light, and high brightness. The light color is close to natural daylight and has good color rendering. It is suitable for working lighting in places where correct color identification is required. For example, it can be used as lighting for squares, stations, docks, airports, etc. When used as an indoor lighting source, filter glass that isolates ultraviolet rays should be installed.
In a short arc xenon lamp, also known as an ultra-high pressure xenon lamp, its outer shell is an outer spherical or elliptical quartz tube, with thoriated tungsten electrodes sealed at both ends, and the tube is filled with xenon gas, and the working pressure can reach 8~30 atmospheres. This type of lamp has the characteristics of short arc gap and concentrated brightness, and is often used as a light source for movie cameras, searchlights, color photography lighting and special instruments.
The thoriated tungsten electrode plays a key role in these xenon lamps. As an electrode, it stimulates the substances in the bulb (xenon gas, a small amount of mercury vapor, metal halide) to ionize in the arc to produce light under the action of high-voltage pulse electricity. Therefore, the thoriated tungsten electrode xenon lamp uses the arc generated by the discharger between the two electrodes to emit light, and has the characteristics of high power, high light efficiency, concentrated light, and long life.
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