Abstract
This paper reports on the visualization of a two-dimensional distribution of electrostatic field vectors around an electrified object using the electric field imager (EFIM) device. The EFIM device is made of a virtually connected pair of plate electrodes in parallel and in proximity, between which an electronic circuit for detection and optical indication is embedded. The EFIM device is not only accurately sensitive to the electrostatic field but also possessed of agility and mobility together with directivity and noninvasiveness. It was successfully demonstrated that electrostatic field vectors were visualized quantitatively, and their spatial distributions were mapped in combination with rather simple, mobile, and low-cost equipment. The advantages and disadvantages of the EFIM visualization scheme are discussed together with the future prospect of the EFIM device.
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