Measuring technique for static electricity using focused sound |
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| Authors: | K Kikunaga T Hoshi H Yamashita Y Fujii K Nonaka |
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| Institution: | 1. Measurement Solution Research Center, National Institute of Advanced Industrial Science and Technology, 807-1 Shuku, Tosu, Saga 841-0052, Japan;2. The Center for Fostering Young and Innovative Researchers, Nagoya Institute of Technology, Japan |
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| Abstract: | A novel method is proposed for non-contact measurement of the distribution of electrostatic charge on a surface based on scanning the sample surface with a focused high frequency acoustic beam to excite movement of the sample surface. An electric field is induced by exciting a charged film-like object, and an electric field sensor measures it instead of an electrostatic field. The focused ultrasound waves are generated by controlling individually the phase of each 285 airborne ultrasound transducers. |
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