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    • 3. 发明授权
    • Light measuring apparatus
    • 光测量装置
    • US4725866A
    • 1988-02-16
    • US912334
    • 1986-09-26
    • Tokuichi TsunekawaHajime KanazawaHiroshi Ohmura
    • Tokuichi TsunekawaHajime KanazawaHiroshi Ohmura
    • G01J1/44G03B7/091G01J1/42
    • G03B7/091G01J1/44
    • The present invention is characterized by repeatedly AD converting in a time series an output of each light sensitive element, and at the same time an added value or a mean value of each one of said AD converted values is obtained so that such added value or a mean value is used as an output of each light sensitive element. According to the present invention, an influence of flickering of an artificial light source can be eliminated and at the same time a light measuring computation with a high level of accuracy can be made with a higher speed than that in a conventional method, and particularly in a light measuring apparatus housing a number of light sensitive elements a light measuring computation with a high level of accuracy can be made in a by far faster speed than that in a conventional method.
    • 本发明的特征在于,以时间序列反复AD转换每个光敏元件的输出,并且同时获得每个所述AD转换值的相加值或平均值,使得这样的附加值或 平均值用作每个光敏元件的输出。 根据本发明,可以消除人造光源的闪烁的影响,同时可以以比常规方法更高的速度进行具有高精度的光测量计算,特别是在 可以以比传统方法更快的速度进行容纳多个光敏元件的具有高精度的光测量计算的光测量装置。
    • 9. 发明授权
    • Exposure control apparatus based on a multimetering system
    • 基于多重测量系统的曝光控制装置
    • US4566775A
    • 1986-01-28
    • US736540
    • 1985-05-21
    • Tokuichi Tsunekawa
    • Tokuichi Tsunekawa
    • G03B7/099G03B7/28G03B7/08
    • G03B7/28G03B7/09976G03B7/09979
    • A meter sensitivity pattern control method for cameras in which an output of a first light metering circuit for the brightness of an object of principal photographic interest is compared with outputs of a plurality of second light metering circuits for brightness of different portions of the environment surrounding the object by a corresponding number of comparing circuits. Thereby one second light metering circuit having an output which lies in a predetermined range different from the output of the first light metering circuit and another second light metering circuit having an output which lies outside the predetermined range are selected for their different contributions to an exposure value. The thus-differentially weighed outputs of the second light metering circuits are computed with the output of the first light metering circuit producing light value information.
    • 一种用于相机的仪表灵敏度图案控制方法,其中将用于感兴趣的主要感兴趣物体的亮度的第一计量光电的输出与多个第二计量光电路的输出进行比较,以用于周围的环境的不同部分的亮度 对象由相应数量的比较电路组成。 因此,选择具有不同于第一计量电路的输出的预定范围的输出和位于预定范围之外的具有输出的另一第二计量电路的一个第二计量光电路,因为它们对曝光值的不同贡献 。 通过第一光计量电路的输出产生光值信息来计算第二计量光电路的差分称重输出。