| 摘要 |
PROBLEM TO BE SOLVED: To provide a filament lamp capable of applying a high power thereto and securing a desirable illuminance distribution of an optical irradiation, and to provide an optically irradiated heat treating apparatus free from variation in optical irradiance distribution onto a material to be treated and in heat treatment of the material to be treated. SOLUTION: The filament lamp has a plurality of filaments each comprising coiled filaments and leads. Each of the filaments is sequentially disposed so as to extend along the shaft of the arc tube, and is constituted to independently supply a power. All leads concerned to other filaments than those included in a relevant region are located at least in the region other than that enclosed by two external tangents and the wall of the arc tube orthogonal to the filaments, and in the region other than that including the relevant filaments, on the sectional surface orthogonal to the shaft of the arc tube. The optically irradiated heat-treating apparatus is constituted with the filament lamp described above. COPYRIGHT: (C)2008,JPO&INPIT
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