short arc discharge lamp

A discharge lamp and short-arc technology, applied to discharge lamps, gas discharge lamps, high-pressure discharge lamps, etc., can solve problems such as hypertrophy, illuminance drop, overheating, etc.

Inactive Publication Date: 2014-10-15
USHIO DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, especially at the time of full load / standby lighting, such deformation occurs repeatedly, and the protrusion becomes hypertrophic due to being accumulated
[0012] Then, the discharge concentrates on the enlarged protruding part, and the protruding part is abnormally overheated, and the electrode material evaporates and adheres to the inner wall of the luminous tube, and the inner wall of the luminous tube turns black, causing a problem that the illuminance drops rapidly.

Method used

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Examples

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Embodiment Construction

[0041] figure 1 It is a cross-sectional view of the first embodiment, (A) is an assembly cross-sectional view, and (B) is an explanatory view of an assembly process.

[0042] In the drawing, an opening 34 opening on the front end surface of the anode 31 is formed at the central portion of the front end surface 33 . Separately from the anode 31, an insertion body 35 made of the same material as the anode is formed in a shape matching the opening 34, and the insertion body 35 sandwiches the buffer member 36 therebetween and is pressed by means of driving or the like. inserted into the opening 34.

[0043] Specifically, an insertion body 35 made of tungsten is inserted into the opening 34 of the front end surface of the anode 31 made of tungsten. conical.

[0044] The buffer member 36 is made of a metal material that has a smaller yield stress than the anode 31 and the insert 35 at the same temperature, specifically, it is made of tantalum, molybdenum, niobium, or rhenium, an...

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Abstract

The lamp has an anode (31) and a cathode, which are arranged opposite to each other in a fluorescent tube. The anode comprises a middle region at a pointed end, and an edge region, which radially surrounds the middle region. The pointed end lies opposite to the cathode. A buffer material (36) made of metal with reduced yield stress than anode material is arranged between the middle region and the edge region. The buffer material consists of an insert body (35), which is separated from the anode. The insert body is inserted into an opening by the buffer material.

Description

technical field [0001] The present invention relates to a short-arc discharge lamp, particularly a short-arc discharge lamp suitable for use as a light source for exposure in the semiconductor and liquid crystal manufacturing fields, and as a light source for backlighting a projector. Background technique [0002] A short-arc discharge lamp is used as a light source for an exposure device or a backlight of a projector by combining it with an optical system because the distance between the ends of a pair of electrodes facing each other in the arc tube is short and approximates a point light source. [0003] Japanese Patent Application Laid-Open No. 10-188890 discloses a conventional short-arc discharge lamp. [0004] Figure 7 discloses this conventional short-arc discharge lamp in , the short-arc discharge lamp 1 has a light-emitting tube 10 having a substantially spherical light-emitting portion 11 in the center and sealing portions 12 at both ends. In the arc tube 10, a c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/04
CPCH01J61/86H01J61/0732
Inventor 山田刚千贺岳人中岛贡
Owner USHIO DENKI KK
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