Electric discharge tube, method of manufacturing the tube, stroboscopic device using the tube and camera
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United States of America Patent
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Oct 26, 2004
Grant Date -
Jun 17, 2004
app pub date -
Feb 4, 2004
filing date -
Feb 19, 2001
priority date (Note) -
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Abstract
An electric discharge tube withstands a large electric input, and has a small size. This discharge tube provides a small photographic strobe device and a small photographic camera. The discharge tube includes a glass bulb having a wall thickness ranging from 0.2 to 0.6 mm and filled with rare gas, a pair of main electrodes provided at both ends of the glass bulb, respectively, a trigger electrode formed on the outer surface of the glass bulb, and a film of silicon dioxide having a thickness ranging from 0.05 to 0.11 .mu.m formed inside of the glass bulb. An electric power not larger than 0.90 Ws/mm.sup.3 with respect to the inner volume of the glass bulb is applied between the main electrodes.
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