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    • 6. 发明授权
    • Autofocus camera including automatically controlled focus adjustment
    • 自动对焦相机包括自动对焦调节
    • US4998124A
    • 1991-03-05
    • US276920
    • 1988-11-28
    • Tokuji IshidaMasataka HamadaJun HasegawaKenji IshibashiToshio NoritaHiroshi Ootsuka
    • Tokuji IshidaMasataka HamadaJun HasegawaKenji IshibashiToshio NoritaHiroshi Ootsuka
    • G02B7/28
    • G02B7/285
    • An AF autofocus camera system for automatically controlling an objective lens for focusing an object including a focus detector for generating defocus data carrying information of a defocus amount and a defocus direction based on a focus condition of an object to be focused through an objective lens detected at a detection cycle, and a focus condition memory for storing defocus data obtained in a present detection cycle, a previous detection cycle, and a cycle before the previous detection cycle. The system further includes first and second infocus detectors for detecting the infocus condition based on the defocus data itself and the average of the defocus data, respectively. First and second lens drive controllers are provided for driving and stopping the objective lens responsive to the first and second infocus detectors, respectively. The system further includes a selector for selecting the second infocus detector and the second lens controller to be operative where none of the defocus data is within an acceptable range or tolerance range so as to be considered as an infocus condition and the defocus direction of the defocus data obtained in the present and previous detection cycles show opposite directions.
    • 一种AF自动对焦照相机系统,用于自动控制用于聚焦物体的物镜,所述物镜包括焦点检测器,用于产生携带散焦量和散焦方向信息的散焦数据,所述散焦数据基于通过在 检测周期,以及聚焦条件存储器,用于存储在当前检测周期中获得的散焦数据,先前检测周期和在先前检测周期之前的周期。 该系统还包括分别基于散焦数据本身和散焦数据的平均值来检测聚焦条件的第一和第二焦点检测器。 第一和第二透镜驱动控制器分别用于响应于第一和第二焦点检测器来驱动和停止物镜。 该系统还包括选择器,用于选择第二焦点检测器和第二透镜控制器,以在散焦数据不在可接受的范围或公差范围内的情况下工作,以便被认为是聚焦条件和散焦的散焦方向 在当前和之前的检测周期中获得的数据显示相反的方向。
    • 10. 发明授权
    • Automatic focus adjusting apparatus of a camera
    • 相机自动调焦装置
    • US5005040A
    • 1991-04-02
    • US479206
    • 1990-02-14
    • Toshio NoritaTokuji IshidaMasataka HamadaKenji Ishibashi
    • Toshio NoritaTokuji IshidaMasataka HamadaKenji Ishibashi
    • G02B7/34
    • G02B7/346
    • An automatic focus adjusting apparatus of a camera comprises three CCD sensors receiving light from an object, a focus detecting apparatus for outputting a focus signal indicative of the focusing state of a photographic lens based on output data from the respective CCD sensors, a calculating apparatus for calculating an amount of driving the photographic lens based on the focus signal, a selector for selecting one of the three CCD sensors, a correcting apparatus for correcting the amount of driving calculated based on the output data from the selected CCD sensor, and a driving apparatus for driving the photographic lens to an in-focus position based on the corrected driving amount. An error in foucs detection incidental to the driving of the lens can be corrected based only on the data from one CCD sensor selected by a selector, so that the focusing error on a moving object can be eliminated in a simple manner.
    • 相机的自动对焦调节装置包括:三个CCD传感器,其接收来自物体的光;焦点检测装置,用于根据来自各个CCD传感器的输出数据输出表示摄影镜头的聚焦状态的聚焦信号;计算装置, 基于焦点信号计算摄影镜头的驱动量,选择器,用于选择三个CCD传感器中的一个,用于校正基于来自所选CCD传感器的输出数据计算的驱动量的校正装置,以及驱动装置 用于基于校正的驱动量将照相镜头驱动到对焦位置。 可以仅基于由选择器选择的一个CCD传感器的数据来校正与透镜驱动有关的foucs检测中的错误,从而可以以简单的方式消除移动物体上的聚焦误差。