Beam Shape Control System with Cylindrical Lens Optics for Optical Wireless Power Transmission

Kenta Moriyama, Kaoru Asaba and Tomoyuki Miyamoto ()
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Kenta Moriyama: Laboratory for Future Interdisciplinary Research of Science and Technology (First), Institute of Integrated Research (IIR), Institute of Science Tokyo, Yokohama 226-8503, Japan
Kaoru Asaba: Laboratory for Future Interdisciplinary Research of Science and Technology (First), Institute of Integrated Research (IIR), Institute of Science Tokyo, Yokohama 226-8503, Japan
Tomoyuki Miyamoto: Laboratory for Future Interdisciplinary Research of Science and Technology (First), Institute of Integrated Research (IIR), Institute of Science Tokyo, Yokohama 226-8503, Japan

Energies, 2025, vol. 18, issue 9, 1-17

Abstract: Due to its narrow divergence, optical wireless power transmission (OWPT) is promising for long-distance transmission systems. In OWPT systems, matching the beam shape with the solar cell geometry is crucial for both efficiency and safety. When the light is incident at an oblique angle, the beam is distorted in an axial direction, which requires appropriate beam shape control. In this study, a cylindrical lens system was designed to ensure uniform and effective light beam irradiation, even under oblique incidence conditions. A numerical model of the optical system was constructed, and it was experimentally confirmed that the beam shape could be controlled within 5% error over a transmission range of 1 m. The optical system was integrated with solar cell detection for consistent target recognition and beam irradiation, and its functionality was experimentally validated. The results are useful for expanding the application and infrastructure design in OWPT.

Keywords: optical wireless power transmission; beam shaping; cylindrical lens; laser (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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