Abstract
In haptic feedback using focused ultrasound, a technique has been proposed that involves creating an ultrasound focal point using a spherical surface without the need for phase control. This method is efficient as each transducer faces directly toward the focal point, but it has a limitation – the focal point remains fixed due to the ultrasonic transducers being attached to a static sphere. This study introduces a method to move the focus in the depth direction by dynamically changing the curvature of the spherical surface to which the transducers are attached. We built a device that can adjust curvature using a servo motor, confirming its capability to relocate the focus position.
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This research was supported by JSPS KAKENHI Grant Number JP20H05957.
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Kon, S., Narita, E., Mizoguchi, I., Kajimoto, H. (2025). Variable Curvature and Spherically Arranged Ultrasound Transducers for Depth-Adjustable Focused Ultrasound. In: Kajimoto, H., et al. Haptics: Understanding Touch; Technology and Systems; Applications and Interaction. EuroHaptics 2024. Lecture Notes in Computer Science, vol 14768. Springer, Cham. https://doi.org/10.1007/978-3-031-70058-3_22
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DOI: https://doi.org/10.1007/978-3-031-70058-3_22
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