Keiji Okino

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About

Keiji Okino is a pioneering figure in industrial laser materials processing, with a career focused on advancing high-power YAG laser systems for precision manufacturing. His key research areas include laser system integration, beam shaping optics, and automated soldering technologies for microelectronics. Okino’s major contributions center on the development of high-average-power YAG laser oscillators and innovative optical systems that enable simultaneous, multi-beam processing. Notably, his 1997 work on a combined-beam YAG laser system—integrating three oscillators, a 6-axis robot, and custom integration optics—demonstrated a scalable approach to high-throughput materials processing, achieving an average power of 1.5 kW from a pulsed source alongside two 2 kW continuous-wave lasers. This system, cited 8 times, laid groundwork for industrial laser welding and cutting. Earlier, in 1989, he developed a rectangular dual-beam optical unit for YAG laser soldering of fine-pitch flat package ICs, enabling simultaneous irradiation of lead arrays with rectangular cross-section beams—a critical innovation for high-density, multi-pin LSI assembly. Though his citation counts are modest, Okino’s work represents foundational engineering in laser-based manufacturing, bridging laser physics and practical automation for electronics production.