-
公开(公告)号：US4079391A
公开(公告)日：1978-03-14
申请号：US629546
申请日：1975-11-06
CPC分类号： G03B7/085
摘要： The output of a bridge circuit which is unbalanced when the quantity of light falling on a light-sensitive element is less than or more than a predetermined light quantity is applied to a differential amplifier circuit whose output varies from a minimum amplitude to a maximum amplitude. The output of the differential amplifier is connected to a first and second threshold circuit whose threshold values are symmetrical to the output value of the differential amplifier when the bridge is in balance. The gain of the differential amplifier is adjusted so that the differential output signal has an amplitude exceeding the first threshold value and less than the second threshold value for variations of light within an allowable range. Within this range the first threshold circuit furnishes an output signal and the second threshold circuit does not. When the first threshold circuit does not furnish an output signal or if the second threshold circuit does, a pulse generator is energized whose pulses are counted by a counter which is controlled to energize the windings of the stepmotor controlling the diaphragm aperture in pairs in a predetermined sequence for opening and the reverse sequence for closing the diaphragm. The operation of the pulse generator and thereby of the motor is impeded when a switch furnishes a signal indicating that the diaphragm is fully open.
摘要翻译： 当落在感光元件上的光量小于或大于预定光量时不平衡的桥式电路的输出被施加到其输出从最小幅度变化到最大幅度的差分放大器电路。 差分放大器的输出端连接到第一和第二阈值电路，当桥接器平衡时，其阈值与差分放大器的输出值对称。 调整差分放大器的增益，使得差分输出信号具有超过允许范围内的光的幅度超过第一阈值且小于第二阈值。 在该范围内，第一阈值电路提供输出信号，第二阈值电路不提供。 当第一阈值电路没有提供输出信号或者第二阈值电路是否被激励时，脉冲发生器被激励，其脉冲被计数器计数，该计数器被控制以激励步进电机的绕组成对地以预定的方式控制隔膜孔 打开顺序和关闭隔膜的相反顺序。 当开关提供指示隔膜完全打开的信号时，脉冲发生器和电动机的操作受到阻碍。
-
公开(公告)号：US4192588A
公开(公告)日：1980-03-11
申请号：US835854
申请日：1977-09-20
CPC分类号： G03B7/085
摘要： The output of a bridge circuit which is unbalanced when the quantity of light falling on a light-sensitive element is less than or more than a predetermined light quantity is applied to a differential amplifier circuit whose output varies from a minimum amplitude to a maximum amplitude. The output of the differential amplifier is connected to a first and second threshold circuit whose threshold values are symmetrical to the output value of the differential amplifier when the bridge is in balance. The gain of the differential amplifier is adjusted so that the differential output signal has an amplitude exceeding the first threshold value and less than the second threshold value for variations of light within an allowable range. Within this range the first threshold circuit furnishes an output signal and the second threshold circuit does not. When the first threshold circuit does not furnish an output signal or if the second threshold circuit does, a pulse generator is energized whose pulses are counted by a counter which is controlled to energize the windings of the stepmotor controlling the diaphragm aperture in pairs in a predetermined sequence for opening and the reverse sequence for closing the diaphargm. The operation of the pulse generator and thereby of the motor is impeded when a switch furnishes a signal indicating that the diaphragm is fully open.
摘要翻译： 当落在感光元件上的光量小于或大于预定光量时不平衡的桥式电路的输出被施加到其输出从最小幅度变化到最大幅度的差分放大器电路。 差分放大器的输出端连接到第一和第二阈值电路，当桥接器平衡时，其阈值与差分放大器的输出值对称。 调整差分放大器的增益，使得差分输出信号具有超过允许范围内的光的幅度超过第一阈值且小于第二阈值。 在该范围内，第一阈值电路提供输出信号，第二阈值电路不提供。 当第一阈值电路没有提供输出信号或者第二阈值电路是否被激励时，脉冲发生器被激励，其脉冲被计数器计数，该计数器被控制以激励步进电机的绕组成对地以预定的方式控制隔膜孔 打开的顺序和关闭膈肌的反向顺序。 当开关提供指示隔膜完全打开的信号时，脉冲发生器和电动机的操作受到阻碍。
-
公开(公告)号：US4058819A
公开(公告)日：1977-11-15
申请号：US583503
申请日：1975-06-03
申请人： Alois Rieder
发明人： Alois Rieder
摘要： A bridge circuit which includes a photoelectric transducer furnishes input signals to a differential amplifier whose analog output signal varies in correspondence to the bridge unbalance. A first and second bistable threshold circuit changes the analog output signal into digital signals signifying bridge unbalance in a first direction, balance, and unbalance in the opposite direction, a motor is energized to rotate in a direction corresponding to the direction of bridge unbalance. The motor can be utilized to move the objective lens of a slide projector or change the aperture of a diaphragm.
摘要翻译： 包括光电传感器的桥接电路将输入信号提供给差分放大器，其模拟输出信号对应于桥不平衡而变化。 第一和第二双稳态阈值电路将模拟输出信号改变成数字信号，表示在相反方向上的第一方向，平衡和不平衡的桥梁不平衡，电动机被激励以在与桥梁不平衡方向相对应的方向上旋转。 电动机可以用于移动幻灯机的物镜或改变隔膜的孔径。
-
公开(公告)号：US4378148A
公开(公告)日：1983-03-29
申请号：US294166
申请日：1981-08-19
申请人： Norbert Burgermann , Alois Rieder , Horst Rossbach
发明人： Norbert Burgermann , Alois Rieder , Horst Rossbach
摘要： A motion picture apparatus and preferably a motion picture projector. A rotary disc shutter is actuated by an electric drive and comprises a shutter sector. A claw mechanism controlled by the electric drive provides for transport of a film and the motion of the film is controlled by a solenoid having associated a solenoid plunger suitable for disengaging the claw transport mechanism after a frame transport phase. A position pulse generator provides a shutter position pulse depending on the position of the shutter sector. An output memory element connected to the electromagnet solenoid controls the energization of the electromagnet and in turn is connected to a switch and to the position pulse generator. Preferably additional memories are provided for performing functions such as controlling the advance and the reverse motion or providing for a timer or individual frame operation.
摘要翻译： 一种运动画面装置，优选地是电影放映机。 旋转盘快门由电驱动器驱动并且包括快门扇区。 由电驱动器控制的爪机构提供了胶片的传送，并且胶片的运动通过螺线管来控制，该螺线管具有一个螺线管柱塞，螺线管柱塞适用于在帧输送阶段之后分离爪传送机构。 位置脉冲发生器根据快门扇区的位置提供快门位置脉冲。 连接到电磁铁螺线管的输出存储元件控制电磁铁的通电，并连接到开关和位置脉冲发生器。 优选地，提供附加存储器用于执行诸如控制提前和反向运动或提供定时器或单独帧操作的功能。
-
公开(公告)号：US3988747A
公开(公告)日：1976-10-26
申请号：US554318
申请日：1975-02-28
申请人： Peter Lermann , Stefan Vogt , Alois Rieder
发明人： Peter Lermann , Stefan Vogt , Alois Rieder
CPC分类号： G02B7/36
摘要： A prism positioned behind the objective rotates at a predetermined frequency. The pulsed light beam produced thereby is split into a first and second pulsed beam, each falling on a photoelectric transducer element. The first photoelectric transducer element is positioned at a distance from the objective which is less than the distance between the film plane and the objective plane by a predetermined distance. The second photoelectric transducer is positioned away from the objective by a distance exceeding the distance between the film plane and the objective plane by the same predetermined distance. The first and second electrical signals produced by the first and second photoelectric transducer are differentiated and stored. The so-stored signals are compared and a control signal for driving a motor in a first or second direction is furnished corresponding to the difference therebetween. The motor drives the objective either closer to or away from the film plane in response to the control signal.
摘要翻译： 位于物体后面的棱镜以预定的频率旋转。 由此产生的脉冲光束被分成第一和第二脉冲光束，每个脉冲光束落在光电换能器元件上。 第一光电传感器元件被定位成距离物镜一定距离，该距离小于膜平面和物平面之间的距离预定距离。 第二光电传感器远离物镜远离镜片平面与物镜之间的距离相同预定距离。 由第一和第二光电变换器产生的第一和第二电信号被差分并存储。 比较如此存储的信号，并且根据它们之间的差异来提供用于驱动电动机沿第一或第二方向的控制信号。 响应于控制信号，马达驱动物镜更靠近或远离胶片平面。
-
-
-
-
搜索结果
5 条记录 (耗时 0.016 秒)
