| 摘要 |
An actuator includes: a first oscillatory system including a frame-shaped driving member and a pair of first axial members holding the driving member from both ends so as to allow the driving member to rotate around an X-axis; a second oscillatory system including a movable plate provided inside the driving member and a pair of second axial members holding the movable plate to the driving member from both ends so as to allow the movable plate to rotate around a Y-axis perpendicular to the X axis; and a driving unit including a permanent magnet provided on the driving member, a coil provided so as to face the permanent magnet, and a voltage applying unit applying a voltage to the coil. The permanent magnet is provided such that a line segment connecting both poles is slanted with respect to each of the X-axis and the Y-axis, in a plan view of the movable plate. The voltage applying unit includes a voltage generating section that generates a first alternating voltage and a second alternating voltage each of which having a frequency different from each other, and a voltage superimposing section that superimposes the first voltage and the second voltage, and the movable plate is rotated around the Y-axis at a frequency of the second voltage while being rotated around the X axis at a frequency of the first voltage by applying the voltage superimposed by the voltage superimposing section to the coil.
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