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公开(公告)号：US4032934A
公开(公告)日：1977-06-28
申请号：US536666
申请日：1974-12-26
摘要： This invention relates to photographic apparatus having means for automatically moving a lens along an axis for properly focusing on an object. The apparatus includes a light emitter for transmitting a train of light signals toward the object at a constant angle relative to the axis, and a pair of movable photoreceptors disposed in spaced relationship with the emitter in the apparatus. The photoreceptors are adapted to receive the light signals upon reflection thereof from the object, and are further adapted to produce electrical signals corresponding to the amount of light received. An operational amplifier is adapted to receive the electrical signals produced by the photoreceptors, and produce a difference signal corresponding to the difference in strength of the electrical signals. The apparatus further includes an electric motor, responsive to the difference signal, adapted to cause the movement of the lens along the axis, and further adapted to cause the movement of the photoreceptors until the amount of light received at each of the photoreceptors is equalized to produce an absolute minimal difference signal indicative of the object being properly focused by the lens. A gain change device is provided to increase the amplitude of the difference signal when relatively far objects are focused on.
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公开(公告)号：US4699504A
公开(公告)日：1987-10-13
申请号：US893750
申请日：1986-08-06
申请人： Harold L. Kabb , John R. Flint , Gary B. Videlock , Ishfaq A. Niazi , Kenneth L. Hendrickson , Gary S. Slutsky , Stuart F. Schwalb , John J. Carroll , Paul H. Friedrich
发明人： Harold L. Kabb , John R. Flint , Gary B. Videlock , Ishfaq A. Niazi , Kenneth L. Hendrickson , Gary S. Slutsky , Stuart F. Schwalb , John J. Carroll , Paul H. Friedrich
CPC分类号： G03B27/47 , G03B15/003
摘要： A distributed processor control system for use with a microimage recording apparatus includes a system control unit, a machine control unit and an operator control unit. The system control unit includes a microprocessor that provides supervisory or master control for the overall distributed control system. The machine control unit includes at least one microprocessor for controlling the operations of a plurality of electromechanical components within the microimage recording apparatus in response to commands and parameters provided by the system control unit and for providing status and error information and requests to the system control unit. The operator control unit includes a microprocessor for controlling the display of operational status and error indications and messages for viewing by an operator and for receiving manual operator entries for enabling normal operation of and diagnostics for the microimage recording apparatus. A shared memory device is utilized for bidirectional communications between the system control unit and the machine control unit. An asynchronous, bidirectional serial link enables bidirectional data transfer between the system control unit and the operator control unit.
摘要翻译： 用于微图像记录装置的分布式处理器控制系统包括系统控制单元，机器控制单元和操作者控制单元。 系统控制单元包括为整个分布式控制系统提供监控或主控制的微处理器。 机器控制单元包括至少一个微处理器，用于响应于由系统控制单元提供的命令和参数控制微图像记录装置内的多个机电部件的操作，并且向系统控制单元提供状态和错误信息和请求 。 操作员控制单元包括微处理器，用于控制操作状态和错误指示的显示以及用于操作者查看的消息，并且用于接收手动操作员条目以使微图像记录装置能够正常操作和诊断。 共享存储器件用于系统控制单元和机器控制单元之间的双向通信。 异步双向串行链路可以在系统控制单元和操作员控制单元之间实现双向数据传输。
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公开(公告)号：US3984846A
公开(公告)日：1976-10-05
申请号：US538228
申请日：1975-01-02
CPC分类号： G02B7/32
摘要： A photographic apparatus having a lens movable along an axis for automatically focusing an object to be photographed is disclosed. The apparatus includes a rotatable sleeve controlled by electrical signals produced by photoreceptor means adapted to receive light emitted by the apparatus and reflected from the object. The sleeve effectuates the movement of the lens along an axis to bring the object into focus. The apparatus further includes assembly means, carrying the photoreceptor means, pivotably secured to the sleeve for adjusting the light received by the photoreceptor means by an amount corresponding to the rotation of the sleeve, thereby changing the electrical signals to maintain the object in focus.
摘要翻译： 公开了一种摄影装置，具有可沿轴线移动的透镜，用于自动聚焦被拍摄物体。 该设备包括由适于接收由该设备发射的光并从该物体反射的感光体产生的电信号控制的可旋转套筒。 套筒使镜片沿轴线移动，使物体聚焦。 该装置还包括组装装置，其携带感光器装置，可枢转地固定到套筒上，用于将由感光器装置接收的光调节到与套筒旋转相对应的量，从而改变电信号以保持物体聚焦。
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