| 摘要 |
PURPOSE:To improve the quality in soldering by detecting the laser reflection light emitted from a solder, deciding the molten state of the solder as well and controlling the radiation of the light based on the decided result thereof. CONSTITUTION:The xenon lamp 19 emitting a beam of light to a soldering place via the fiber 12 for light guide and the laser oscillator 13 leading the laser light to the creamy solder 9 are arranged together. Simultaneously with the light of the lamp 19 being radiated on the creamy solder 9 the laser light from the laser oscillator 13 is led to the solder 9. In this case, the laser reflection light is scattered until the solder 9 is melted but reflected to one direction on the solder surface after melting. This reflected laser light is detected by an photoelectric transducer 17 and a control circuit 30 judges the melting of the solder 9 and the input control of the light is executed by a shutter 23. The soldering quality is improved because of the under and over light radiation being prevented. |
