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Real-time detection of focal position of workpiece surface during laser processing using diffractive beam samplers Cao, Binh Xuan; Hoang, PhuongLe; Ahn, Sanghoon; Kim, Jeng-o; Sohn, Hyonkee; Noh, Jiwhan, OPTICS AND LASERS IN ENGINEERING, v.86, pp.92 - 97, 2016-11 |
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