| 摘要 |
PROBLEM TO BE SOLVED: To provide a temperature measuring instrument that can reduce the influence of thermal radiation light reflecting the temperature near the surface of a permeable resin member, and can improve temperature measurement accuracy of the resin interface. SOLUTION: The detected wavelength ranges of first and second photodetectors 8 and 9 are shifted, and during laser welding, the first photodetector 8 detects thermal radiation light 6 that is radiated from the resin interface and permeates the permeable resin member 3 and thermal radiation light 7 radiated from the surface of the permeable resin member 3, and generates a detection signal, and the photodetector 9 detects only the thermal radiation light 7 radiated from the surface of the permeable resin member 3, and generates a detection signal. A arithmetic section 10 performs calculation so as to reduce the influence of thermal radiation light 7 based on the detection signals from the first and second photodetectors 8 and 9, and measures the temperature on the resin interface. COPYRIGHT: (C)2007,JPO&INPIT
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