| 摘要 |
A motor for moving a lens element in a photographic camera comprises an annular bender of piezoelectric plastic material such as polyvinylidene fluoride (PVF2). The outside edge of the annular bender is rigidly fixed to the camera, and the movable lens element is flexibly supported inside the annulus. The bender is mounted in the camera such that deflection of the bender produced by a moderately high voltage displaces the lens element along the optical axis of the camera.
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