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    • 49. 发明授权
    • Lens position control device
    • 镜头位置控制装置
    • US5223981A
    • 1993-06-29
    • US829905
    • 1992-02-03
    • Naoya Kaneda
    • Naoya Kaneda
    • G02B7/08G02B7/10G03B5/00
    • G02B7/102
    • An optical apparatus comprises a first lens arranged to be movable along an optical axis for a power varying action; a second lens arranged to be movable also along the optical axis for focusing and also for compensation during the power varying action, position detecting circuits for detecting the positions of the first and second lenses, a focus detecting circuit, and a control circuit for controlling the movement of the second lens on the basis of information obtained from the position detecting circuits and the focus detecting circuit when the power varying action is performed, the control circuit being arranged to vary a manner of control over the movement of the second lens according to whether or not the power varying action is in process in a case where the second lens is to be forcibly moved while the focus detecting circuit is inoperative.
    • 一种光学装置包括:第一透镜,被布置成沿光轴可移动以进行功率变化动作; 第二透镜,其也可以沿着用于聚焦的光轴移动,并且还用于在功率变化动作期间的补偿;位置检测电路,用于检测第一和第二透镜的位置;焦点检测电路;以及控制电路 根据从位置检测电路和焦点检测电路获得的信息,当执行电力变化动作时,第二透镜的移动,控制电路被布置成根据第二透镜的移动方式改变对第二透镜的移动的控制方式 或者在聚焦检测电路不工作的情况下,在强制移动第二透镜的情况下,不进行动力变化动作。