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Power-based refractive index (RI) sensing is demonstrated by exploiting an ultrasonically pressed plastic optical fiber (POF). We can be easily and cost-efficiently fabricate this structure, within a short while (∼1 s), without using external heat sources or chemical materials. We have only to simply press the horn connected to an ultrasonic transducer against part of the POF. The RI dependence of...
A hybrid transducer type ultrasonic motor using thrust bearing with lubricant is proposed and fundamental motor characteristics are measured. The maximum rotation of 10 r.p.m., the maximum torque of 0.123 Nm and the maximum efficiency of 2.7 % were obtained under the preload of 300 N.
Ultrasonic manipulation of small particles, including liquid droplets, over long distances is discussed. It is well known that particles can be trapped at the nodal points of an acoustic standing wave if the particles are much smaller than the wavelength of the standing wave. We used an experimental setup consisting of a 3-mm-thick, 605-mm-long duralumin bending vibrating plate and a reflector. A...
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