Ultrahigh pressure discharge lamp of the short arc type with...

Details Ultrahigh pressure discharge lamp of the short arc type with... Ultrahigh pressure discharge lamp of the short arc type with...

2005-06-07

2005-06-07

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Having particular electrode structure

C313S570000, C313S571000, C313S623000, C313S626000, C313S631000, C313S639000

Reexamination Certificate

active

06903509

ABSTRACT:
An arrangement with a relatively high pressure tightness in a super-high pressure mercury lamp which is operated with an extremely high mercury vapor pressure is achieved in accordance with the invention in a super-high pressure discharge lamp of the short arc type having a light emitting part in which a pair of electrodes are disposed opposite each other and which is filled with at least 0.15 mg/mm3mercury; and side tube parts which extend from each side of the light emitting part and in each of which a respective one of the electrodes is partially hermetically sealed and is connected to a metal foil, by the area of the respective metal foil which is connected to the respective electrode has a smaller width than the width in the remaining area of the metal foil, the area with the smaller width wrapping at least partially around the outside surface of the electrode.

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