Temperature measurement is extremely important for process control in laser manufacturing. To obtain temperature, CO2 laser was used as heating source, and fiber optic spectrometer was used for gathering the molten pool radiant spectrum. Meanwhile, temperature can be calculated based on the relationship between spectrum slope and temperature, which was transformed by Wien formula. After this, the infrared thermometer and thermocouple were used for error calibration. The result showed that the errors of this method ranged from -50 ℃ to 60 ℃.
Research on high temperature measurement in laser manufacturing based on spectrum
Jianmin Miao, Jianhua Yao, Xiaodong Hu, Chenghua Sui; March 23–25, 2010. "Research on high temperature measurement in laser manufacturing based on spectrum." Proceedings of the Pacific International Conference on Applications of Lasers and Optics. PICALO 2010: 4th Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Wuhan, People’s Republic of China. (pp. P129). ASME. https://doi.org/10.2351/1.5057274
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