| 摘要 |
PURPOSE:To prevent generation of defective soldering by providing an IR detector for a specific wavelength region to measure the temp. of a solder-joined part and controlling the heating of soldering in accordance with the temp. change thereof. CONSTITUTION:A reflecting mirror 8 which reflects only the characteristic wavelength region of IR rays is provided to an optical system 1. A condenser lens 9 and the IR detector 10 are disposed thereto. The light emitted from a thermal light source 2 is passed through the reflecting mirror 3, a parallel correcting lens 4 and the reflecting mirror 8 and is thereby condensed to execute soldering of electronic parts. The IR rays of the intensity proportional to the temp. radiated from the solder-joined part are reflected only in the specific wavelength region by the reflecting mirror 8 and are detected by the IR detector 10. A thermometer control part 13 shields the light by a light shielding device 6 via a controller 12 to lower the output of the light source 2 according to the result of the detection. Since the heating control of the soldering is exactly executed, the generation of the defective soldering is prevented.
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