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    • 54. 发明授权
    • Focusing device
    • 聚焦装置
    • US06317563B1
    • 2001-11-13
    • US08862352
    • 1997-05-23
    • Kazuyuki Maeda
    • Kazuyuki Maeda
    • G03B1700
    • G02B7/32
    • A focusing device has a first unit for producing information for focusing an optical unit and a second unit for forming, based on a predetermined number of pieces of the information derived from the first unit, an operation instruction signal for operating the optical unit. The second unit, when an actuating signal is input while a number of pieces of information from the first unit is still smaller than the predetermined number, forms the operation instruction signal based on a smaller number of pieces of information than the predetermined number.
    • 聚焦装置具有用于产生用于聚焦光学单元的信息的第一单元和用于基于从第一单元导出的预定数量的信息形成用于操作光学单元的操作指令信号的第二单元。 第二单元,当来自第一单元的多条信息输入的启动信号仍然小于预定数量时,基于比预定数量少的多条信息形成操作指令信号。