公开(公告)号：US4268152A

公开(公告)日：1981-05-19

申请号：US107552

申请日：1979-12-27

申请人： Hiroshi Aizawa ,  Masanori Uchidoi ,  Kazunobu Urushibara ,  Nobuyuki Suzuki ,  Masami Shimizu

发明人： Hiroshi Aizawa ,  Masanori Uchidoi ,  Kazunobu Urushibara ,  Nobuyuki Suzuki ,  Masami Shimizu

IPC分类号： G03B7/00 ,  G03B9/62 ,  G03B7/08 ,  G03B9/08 ,  G03B9/34

CPC分类号： G03B9/62

摘要： A control system for a camera controls a shutter release operation electromagnetically. A signal generating circuit produces a switching signal for operating a switching circuit which supplies current to a control circuit for a camera. The signal generating circuit is in a condition to always produce a switching signal when a camera operation member is set to normal photographing modes other than the bulb photographing mode, and is out of condition to produce the switching signal during the time between actuation of a magnet and termination of the shutter opening operation. The closing operation of the shutter is checked by means of a mechanical control member during the release when the camera operation member is set in the bulb photographing mode.

摘要翻译： 用于相机的控制系统以电磁方式控制快门释放操作。 信号发生电路产生切换信号，用于操作向摄像机的控制电路提供电流的开关电路。 当相机操作部件被设置为除了灯泡拍摄模式之外的正常拍摄模式时，信号发生电路处于总是产生切换信号的状态，并且在磁体致动之前的时间内不能产生切换信号 并且快门打开操作的终止。 当照相机操作构件被设置在灯泡拍摄模式时，通过机械控制构件在释放期间检查快门的关闭操作。

公开(公告)号：US4247186A

公开(公告)日：1981-01-27

申请号：US50124

申请日：1979-06-19

申请人： Masanori Uchidoi ,  Hiroshi Aizawa ,  Kazunobu Urushibara ,  Nobuyuki Suzuki ,  Masami Shimizu

发明人： Masanori Uchidoi ,  Hiroshi Aizawa ,  Kazunobu Urushibara ,  Nobuyuki Suzuki ,  Masami Shimizu

IPC分类号： G03B7/081 ,  G01J1/44 ,  G03B7/083

CPC分类号： G01J1/44 ,  G03B7/08

摘要： A photometric circuit for a camera including a first operational amplifier with a photo-electric element connected between its inverted and non-inverted input terminals and, a logarithmic compression diode connected between the output terminal and the inverted input terminal of the first operational amplifier, thus providing a voltage corresponding to the logarithmic value of the brightness of an object to be photographed at the output terminal of the first operational amplifier.A second operational amplifier has a plurality of temperature compensating commonly polarized diodes connected in parallel between its inverted input terminal and the output terminal. A first constant voltage is applied to the non-inverted input terminal of the second operational amplifier while a second constant voltage is applied through a resistor to the inverted input terminal of the second operatonal amplifier, thereby providing temperature-compensation of the output voltage of said first operational amplifier.

摘要翻译： 一种用于照相机的测光电路，包括连接在其反相和非反相输入端子之间的光电元件的第一运算放大器和连接在第一运算放大器的输出端和反相输入端之间的对数压电二极管，因此 提供与在第一运算放大器的输出端子处拍摄的物体的亮度的对数值相对应的电压。第二运算放大器具有多个温度补偿共极化二极管，并联连接在其反相输入端和 输出端子。 第一恒定电压施加到第二运算放大器的非反相输入端，而第二恒定电压通过电阻施加到第二操作放大器的反相输入端，从而提供所述第二运算放大器的输出电压的温度补偿 第一运算放大器。