| 摘要 |
The lens driving apparatus moves a magnification-varying lens and moves a focus lens to compensate for image plane variation caused by movement of the magnification-varying lens. The apparatus includes a zoom operating member, a stepping motor, a zoom controller controlling drive of the stepping motor, a focus actuator moving the focus lens, a focus controller controlling drive of the focus actuator, a memory storing cam data to compensate for the image plane variation, and a zoom position detector. During a magnification variation operation, the zoom controller performs open-loop control of the drive of the stepping motor based on an operation amount of the zoom operating member, and the focus controller controls the drive of the focus actuator based on the actual position of the magnification-varying lens detected by the zoom position detector, and the cam data.
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