Method of manufacturing metal halide lamp
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United States of America Patent
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Feb 17, 1987
Issued Date -
N/A
app pub date -
Sep 3, 1985
filing date -
May 10, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A metal halide lamp provides exceptional color rendition because of a high calcium iodide partial pressure. A long-arc ellipsoidal arc tube provides a high 'cold spot' temperature. The method of manufacture of the lamp includes heating the arc tube tubulation while burning the lamp after dosing, and then an evacuation step to eliminate moisture due to the hygroscopic calcium iodide.
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