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    • 9. 发明授权
    • Camera exposure control devices with smoothing circuit
    • 具有平滑电路的摄像机曝光控制装置
    • US4392727A
    • 1983-07-12
    • US301096
    • 1981-09-10
    • Masayoshi SaharaMasaaki NakaiTokuji IshidaHiroshi Hosomizu
    • Masayoshi SaharaMasaaki NakaiTokuji IshidaHiroshi Hosomizu
    • G01J1/44G03B7/085G03B7/089
    • G03B7/085
    • A controlling device that determines the diaphragm aperture of the camera in accordance with an output of a light measuring circuit, which detects a light from an object to be photographed being illuminated by a light which includes an alternatingly changing component and has its intensity maintained constant in effect for a given time period. The device is equipped with a smoothing circuit for smoothing the ripple component in the photoelectric output. The smoothing circuit is set to have a charge time constant smaller than the discharge time constant and generates an output equivalent to the peak value of the ripple component. The light that illuminates the photographic object can be generated from the electronic flash and the photoelectric detector may be arranged within the body of a camera to receive the light from the photographic object that passes through the diaphragm aperture of the camera.
    • 根据检测来自被拍摄物体的光的光测量电路的输出来确定相机的光圈孔径的控制装置被包含交替变化的部件并且其强度保持恒定的光照射 在给定时间段内的效果。 该器件配有一个平滑电路,用于平滑光电输出中的纹波分量。 平滑电路被设置为具有小于放电时间常数的充电时间常数,并且产生与波纹分量的峰值相当的输出。 可以从电子闪光灯产生照射物体的光,并且光电检测器可以布置在照相机的主体内,以接收来自照相物体的通过照相机的光圈孔的光。
    • 10. 发明授权
    • Exposure control device for cameras
    • 相机曝光控制装置
    • US4496230A
    • 1985-01-29
    • US395991
    • 1982-07-16
    • Masaaki NakaiMasayoshi SaharaHiroshi HosomizuTokuji Ishida
    • Masaaki NakaiMasayoshi SaharaHiroshi HosomizuTokuji Ishida
    • G03B7/28G03B7/085G03B7/16G03B15/05
    • G03B7/16
    • A flash photography system for a camera which is adapted to be used with an electronic flash device which supplies a control signal when the device is a ready condition. The camera includes a diaphragm control circuit which automatically control the diaphragm aperture in accordance with a measurement of the light from the scene to be photographed. The diaphragm control circuit includes a circuit for producing a first program signal for controlling the diaphragm aperture and camera exposure time in a first programmed relationship with the light measurement for daylight or natural light photography, and a circuit for produces a second program signal for controlling the diaphragm aperture in a second programmed relationship with the light measurement for flash photography. The second program signal is adapted to provide a proper exposure for the ambient light condition as well as the flash light illumination.
    • 一种用于相机的闪光摄影系统,其适于与当该装置处于就绪状态时提供控制信号的电子闪光装置一起使用。 照相机包括光圈控制电路,其根据要拍摄的场景的光的测量自动地控制光阑孔径。 光阑控制电路包括用于产生用于控制光阑孔径的第一程序信号和与日光或自然光摄影的光测量成第一编程关系的照相机曝光时间的电路,以及用于产生第二程序信号的电路, 光圈孔径与闪光摄影的光线测量值成二次关系。 第二程序信号适于为环境光条件以及闪光照明提供适当的曝光。