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    • 11. 发明授权
    • Flash lighting unit for a camera
    • 相机闪光照明装置
    • US4464609A
    • 1984-08-07
    • US551491
    • 1983-11-14
    • Zenzo NakamuraTakashi UchiyamaShohei OhtakiTokuichi TsunekawaMasanori UchidoiYukio Mashimo
    • Zenzo NakamuraTakashi UchiyamaShohei OhtakiTokuichi TsunekawaMasanori UchidoiYukio Mashimo
    • G03B15/05H05B41/32H05B41/14
    • H05B41/325
    • A voltage detecting means is provided in a flash lamp firing circuit for detecting the attainment of the voltage of a storage capacitor to a satisfactory lamp firing voltage level to assure that a photographic camera associated with the flash lighting unit operates in a flash exposure range switched from a daylight exposure range only when a sufficient voltage is available to fire the lamp at the time of striking of the lamp. In one embodiment, the detecting means comprises two transistorized circuits having output terminals one of which is connected to the gate lead of a SCR in a discharge circuit of the lamp, and another output terminal which is arranged to be connectable to a light-emitting diode of the camera and therefrom connected to the gate lead of an electronic change-over switch for selection of the operating ranges of the camera, the light-emitting diode being arranged to be visible from the outside of the camera so that the operator is immediately aware if the storage capacitor voltage has attained the satisfactory firing level.
    • 电压检测装置设置在闪光灯点火电路中,用于检测存储电容器的电压达到满意的灯点火电压电平,以确保与闪光照明单元相关联的照相机在从 日光曝光范围仅在足够的电压可用于在点亮灯时点亮灯。 在一个实施例中,检测装置包括两个晶体管电路,其具有输出端子,其一个连接到灯的放电电路中的SCR的栅极引线,另一个输出端子被布置成可连接到发光二极管 并且由此连接到用于选择相机的操作范围的电子转换开关的栅极引线,所述发光二极管被布置为从相机的外部可见,使得操作者立即知道 如果存储电容器电压达到令人满意的放电电平。
    • 12. 发明授权
    • Automatic focus adjusting apparatus for camera
    • 自动对焦调节装置
    • US4425031A
    • 1984-01-10
    • US265806
    • 1981-05-21
    • Shuichi TamuraMasahiko OgawaTokuichi TsunekawaRyuji Tokuda
    • Shuichi TamuraMasahiko OgawaTokuichi TsunekawaRyuji Tokuda
    • G03B13/36G02B7/28G02B7/32G03B3/00G01J1/46
    • G02B7/32
    • The active automatic focusing apparatus disclosed scans the object to be photographed with light from a light projector and includes a sensor sensing reflected light, a peak detector for detecting the peak value of the signal sensed by the sensor, a control producing a stop signal suitable for stopping focusing movement of the objective lens in accordance with the output of the peak detector, and a stop device for stopping the movement of the objective lens on the basis of the output of the control. A comparator compares the level of the detected signal with that of a preset noise signal so as to produce a first control signal when the level of the detected signal is higher than that of the noise signal. A given distance detector produces a second control signal when the objective lens is moved to a predetermined position corresponding to a distance at which a peak of the detected signal can be detected by the peak detector. An arrangement applies a second stop signal to the stop device to stop the movement of the objective lens when the first and the second stop signals are produced.
    • 所公开的主动式自动对焦装置用来自光投射器的光扫描要拍摄的物体,并且包括感测反射光的传感器,用于检测由传感器感测到的信号的峰值的峰值检测器,产生适于 根据峰值检测器的输出停止物镜的聚焦运动,以及用于基于控制的输出停止物镜的运动的停止装置。 比较器将检测信号的电平与预设噪声信号的电平进行比较,以便当检测信号的电平高于噪声信号的电平时产生第一控制信号。 当物镜移动到与由峰值检测器检测到的检测信号的峰值的距离相对应的预定位置时,给定距离检测器产生第二控制信号。 当产生第一和第二停止信号时,布置将第二停止信号施加到停止装置以停止物镜的移动。