Gas discharge lamp with high-energy vacuum ultraviolet emission
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United States of America Patent
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Issued Date -
Oct 6, 2005
app pub date -
Mar 30, 2005
filing date -
Mar 31, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A novel VUV lamp is described, in which one or more portions of the lamp enclosure include a VUV transmissive section to transmit VUV radiation. At least one of the VUV transmissive sections is fabricated from crystalline LiCaAlF.sub.6. The entire enclosure of the lamp can, for example, be fabricated from crystalline LiCaAlF.sub.6. Alternatively, a portion of the enclosure other than the VUV transmissive section(s) of the lamp can be fabricated from a material other than LiCaAlF.sub.6. For example, the material can be glass, ceramic or quartz. In one type of embodiment, the lamp's VUV optical radiation output is produced by an electrical gas discharge inside a sealed bulb. In preferred embodiments of this type, the bulb is filled with a low pressure of nitrogen gas or carbon monoxide gas.
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