| 摘要 |
PROBLEM TO BE SOLVED: To provide a long life heater lamp for a heat source in which a rush current that is generated during voltage application to an incandescent lamp is reduced and in which the blackening of an arc tube is suppressed. SOLUTION: As for this heater lamp for the heat source, in the heater lamp for the heat source in which halogen is enclosed in the arc tube 1 and a tungsten filament 5 that contains Re is arranged, the content of Re is 0.5-3 wt%. Furthermore, 10 vol% or more of nitrogen gas is enclosed in the arc tube 1, and the filament 5 has a structure that a plurality of filament element wires are bundled. COPYRIGHT: (C)2005,JPO&NCIPI
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