| 摘要 |
An oscillation actuator by which stable drive can be obtained, a lens barrel, a camera system and an oscillator are provided. In first oscillation mode and second oscillation mode, oscillators (11, 11A, 11B) of the oscillation actuator can oscillate. The number of resonance frequency in the second oscillation mode, which is different from the first oscillation mode used for driving a relative motion member (15), is prevented from being same as the frequency of the higher harmonic of a driving signal. ® KIPO & WIPO 2009
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