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    • 9. 发明授权
    • Light measuring device
    • 光测量装置
    • US4843417A
    • 1989-06-27
    • US248380
    • 1988-09-22
    • Tokuji IshidaHiroshi OotsukaHiromu Mukai
    • Tokuji IshidaHiroshi OotsukaHiromu Mukai
    • G02B7/34G03B7/093G03B7/28
    • G03B7/28G02B7/34G03B7/093
    • A light measuring device, for use in a camera having an objective lens, for measuring a brightness of a spot of an object, uses an autofocus detecting system which includes an array of light receiving elements for producing charges at a rate relative to an intensity of the light impinging thereon from the object, and a light receiver provided adjacent the light receiving element array for producing a photocurrent at an amount relative to an intensity of the light impinging thereon from said object. The charges produced from the light receiving elements are integrated in a plurality of charge accumulation portions, respectively, and the charges produced by the light receiver is integrated in a capacitor. A comparator is provided for for comparing the integrated charges with a predetermined level, and for producing a stop integration signal when the integrated charges reaches the predetermined level so as to stop the integration in the first integration means. A spot brightness detector is provided for detecting the brightness of the spot of the object using the integrated charges from the capacitor.
    • 用于测量物体的光斑亮度的用于具有物镜的照相机中的光测量装置使用自动聚焦检测系统,该自动聚焦检测系统包括一组光接收元件,用于以相对于 从物体入射的光,以及设置在光接收元件阵列附近的光接收器,用于产生相对于从所述物体照射的光的强度的量的光电流。 从光接收元件产生的电荷分别集成在多个电荷累积部分中,并且由光接收器产生的电荷集成在电容器中。 提供比较器,用于将积分电荷与预定电平进行比较,并且用于当积分电荷达到预定电平时产生停止积分信号,以便停止在第一积分装置中的积分。 提供了一种点亮度检测器,用于使用来自电容器的积分电荷来检测物体的光斑的亮度。