High pressure discharge lamp
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United States of America Patent
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-
Nov 16, 1999
Grant Date -
N/A
app pub date -
Nov 21, 1997
filing date -
Nov 22, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The high pressure discharge lamp has a discharge vessel (1) mounted in an outer envelope (4) in which an oxygen dispenser (30) is disposed. The oxygen dispenser (30) contains silver oxide and may be disposed at a location where it obtains a temperature of at least 340.degree. C. during operation of the lamp, at which temperature the oxide is decomposed and oxygen is released. The deposit of black coatings originating from hydrocarbon contaminations is thereby prevented.
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