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    • 1. 发明授权
    • Automatic exposure control apparatus for a single lens reflex camera
    • 单反相机自动曝光控制装置
    • US4137541A
    • 1979-01-30
    • US619456
    • 1975-10-03
    • Yukio MashimoMasanori UchidoiMasayoshi YamamichiFumio ItoTokuichi TsunekawaTadashi Ito
    • Yukio MashimoMasanori UchidoiMasayoshi YamamichiFumio ItoTokuichi TsunekawaTadashi Ito
    • G03B7/091G03B7/08
    • G03B7/097
    • An automatic exposure control apparatus for controlling the diaphragm of the camera in accordance with the preselected shutter time and the exposure value, in which a digital-to-analog converter having a counter responsive to the number of pulses supplied from a clock pulse generator through a gate produces a time variable output capable of attaining a certain level dependent upon the preselected shutter time and a light value as photoelectrically sensed, that is, an exposure value and, which is detected by a first comparator. The output of the first comparator is applied to the gate, so that the converter is set to memorize the exposure value therein. As the diaphragm presetting ring is moved from the maximum to minimum aperture position with production of a time variable output from a signal generator associated therewith, a second comparator responsive to the attainment of the time variable output of the signal generator to a level dependent upon the final output of the set converter produces an output which is applied to arresting means for the diaphragm presetting ring. This results in automatic adjustment of the position of the presetting ring. At the time the presetting ring begins to move, the diaphragm driving means is actuated causing the diaphragm means to be brought into engagement with the ring. Thus, an effective exposure aperture is established in the diaphragm means.
    • 一种自动曝光控制装置,用于根据预选的快门时间和曝光值控制照相机的光圈,其中具有计数器的数模转换器响应于从时钟脉冲发生器通过一个 栅极产生能够获得一定水平的时间变量输出,这取决于预选的快门时间和光电感测的光值,即曝光值,并由第一比较器检测。 将第一比较器的输出施加到栅极,使得转换器被设置为存储其中的曝光值。 由于膜片预设环从最大孔径位置移动到最小孔径位置,产生与其相关联的信号发生器的时间变量输出,第二比较器响应于将信号发生器的时间可变输出达到取决于 设定转换器的最终输出产生一个输出,该输出应用于隔膜预调环的止动装置。 这样可以自动调节预置环的位置。 在预置环开始移动时,驱动隔膜驱动装置使隔膜装置与环接合。 因此,在隔膜装置中建立有效的曝光孔径。
    • 6. 发明授权
    • Photographic camera having electromagnetic diaphragm control
    • 照相机具有电磁光阑控制
    • US4096493A
    • 1978-06-20
    • US731939
    • 1976-10-13
    • Akio SunouchiYoshiaki WatanabeFumio ItoYukio MashimoNobuaki DateTadashi Ito
    • Akio SunouchiYoshiaki WatanabeFumio ItoYukio MashimoNobuaki DateTadashi Ito
    • G03B7/0805G03B7/091G03B9/07G03B19/12G03B7/08
    • G03B19/12G03B7/097G03B9/07
    • A photographic camera having a manually and automatically adjustable diaphragm is provided with an electromagnetically operated diaphragm scanning mechanism in combination with a manually operable depth of field pre-viewing device to enable a visual determination of the utilizable zone of sharpness in a reflex viewfinder of the camera regardless of the fact that the camera remains in the run down position. For this purpose, the diaphragm scanning mechanism includes a scanning member and a driving member arranged to establish driving connection therebetwen during the automatic adjustment of the diaphragm. Release means is provided and is responsive to the termination of closing operation of the camera shutter for effecting release of the driving connection, whereby the photographer before cocking the camera is enabled to manipulate the diaphragm followed by the pre-viewing device to read off the range of sharpness in dependence on the manual setting of the diaphragm for use in making a subsequent exposure.
    • 具有手动和可自动调节的光圈的照相机设置有电磁操作的隔膜扫描机构,与手动可操作的景深预先观察装置相结合,以使得能够可视地确定相机的反射取景器中的清晰度的可利用区域 不管相机是否处于运行状态。 为此,隔膜扫描机构包括扫描构件和布置成在隔膜的自动调节期间建立驱动连接的驱动构件。 提供释放装置并且响应于照相机快门的关闭操作的终止以实现驱动连接的释放,由此在启动相机之前的拍摄者能够操纵隔膜,然后是预先观看装置以读出该范围 根据用于进行后续曝光的隔膜的手动设置而具有清晰度。
    • 10. 发明授权
    • Exposure information setting device for camera
    • 相机曝光信息设定装置
    • US4089011A
    • 1978-05-09
    • US737345
    • 1976-11-01
    • Nobuaki DateYoshiaki WatanabeAkio SunouchiYukio MashimoFumio ItoTadashi Ito
    • Nobuaki DateYoshiaki WatanabeAkio SunouchiYukio MashimoFumio ItoTadashi Ito
    • G03B7/091G03B7/093G03B17/20G03B7/08G03B17/00
    • G03B7/093G03B17/20
    • The present invention relates to an exposure information setting device for a camera having a digital control system in which the aperture value of the lens is applied to the exposure amount control circuit as digital information by means of the aperture value setting mechanism. The device is so designed that the first comb tooth shaped conductor pattern and the second comb tooth shaped conductor pattern are arranged in parallel with each other in such a manner that a phase difference takes place between them. A pair of series of pulses are obtained by making the contact in functional engagement with the aperture value setting operation, moving slidingly over the first and the second conductor patterns. The direction along which the aperture value information varies is detectable by applying the pair of series of pulses thus obtained to the exposure operational circuit through the phase sorting circuit.
    • 本发明涉及一种具有数字控制系统的相机的曝光信息设定装置,其中通过光圈值设定机构将透镜的光圈值作为数字信息施加到曝光量控制电路。 该装置被设计成使得第一梳齿形导体图案和第二梳齿形导体图案彼此平行地布置,使得它们之间发生相位差。 通过使接触与孔径值设定操作功能接合而获得一对脉冲序列,滑动地移动到第一和第二导体图案上。 孔径值信息变化的方向可以通过将这样获得的一对脉冲序列通过相位分类电路施加到曝光操作电路来检测。