| 摘要 |
A scanning device includes: an optical element in which a refractive index distribution changes according to the intensity of an electric field generated therein such that an incident laser beam is scanned; first and second electrodes provided on two opposite surfaces of the optical element; and a control unit that controls a voltage applied to at least one of the first and second electrodes such that the electric field is generated in one direction and the other direction opposite to the one direction with time in the optical element.
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