| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive potential measuring device capable of measuring a potential of a measured object with a high-frequency wave without destructing the measured object and an electro-optic element. SOLUTION: At least two electrodes 2, 3 are formed on a surface of an electro-optic element 1 of which an optical property varies with an electric field, and the elctrodes 2, 3 are connected electrically to electrodes 6, 7 of a measured wiring board 5. Optical property change of light from a laser diode pulse light source 12 caused by the electro-optic element 1 is converted into light intensity change to be detected by a photo-detecting part 20, and an inexpensive potential measuring device capable of coping with a high speed signal is provided thereby, which is free from destruction of the measured object and the electro-optic element 1.
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