Automatic exposure control for automatic-focus cameras
    11.
    发明授权
    Automatic exposure control for automatic-focus cameras 失效
    自动对焦摄像机的自动曝光控制

    公开(公告)号:US4466718A

    公开(公告)日:1984-08-21

    申请号:US205976

    申请日:1980-11-12

    CPC分类号: G02B7/30

    摘要: When a trigger lever is depressed, both a focus adjuster ring and a control disk commence to rotate in unison, driven by a spring mechanism. Position-sensing switches receive signals indicating which subject-distance setting the focus adjuster ring should be arrested at, and furthermore are opened and closed by the control disk during movement of the latter. When the focus adjuster ring reaches the required subject distance setting, it is arrested and kept arrested, thereby completing an automatic focussing operation, but the control disk continues to turn on to its end position, at which it causes the shutter mechanism of the camera to open and furthermore the exposure-timing circuit of the camera to initiation a scene-light-dependent exposure-timing operation.

    摘要翻译: 当按下触发器杆时,由弹簧机构驱动的焦点调节器环和控制盘都一致地开始旋转。 位置检测开关接收指示焦点调节环在哪个被摄体距离设置应该被阻止的信号,并且进一步在控制盘的运动期间由控制盘打开和关闭。 当焦点调节环达到所需的被摄体距离设置时,它被阻止并保持停止,从而完成自动聚焦操作,但是控制盘继续转到其终端位置,在该位置使摄像机的快门机构 打开相机的曝光定时电路,并进一步启动与场景相关的曝光定时操作。

    Photographic camera
    12.
    发明授权
    Photographic camera 失效
    摄影相机

    公开(公告)号:US4324463A

    公开(公告)日:1982-04-13

    申请号:US2932

    申请日:1979-01-12

    CPC分类号: G02B7/30

    摘要: When a trigger lever is depressed, both a focus adjuster ring and a control disk commence to rotate in unison, driven by a spring mechanism. Position-sensing switches receive signals indicating which subject-distance setting the focus adjuster ring should be arrested at, and furthermore are opened and closed by the control disk during movement of the latter. When the focus adjuster ring reaches the required subject distance setting, it is arrested and kept arrested, thereby completing an automatic focussing operation, but the control disk continues to turn on to its end position, at which it causes the shutter mechanism of the camera to open and furthermore the exposure-timing circuit of the camera to initiation a scene-light-dependent exposure-timing operation.

    摘要翻译: 当按下触发器杆时,由弹簧机构驱动的焦点调节器环和控制盘都一致地开始旋转。 位置检测开关接收指示焦点调节环在哪个被摄体距离设置应该被阻止的信号,并且进一步在控制盘的运动期间由控制盘打开和关闭。 当焦点调节环达到所需的被摄体距离设置时,它被阻止并保持停止,从而完成自动聚焦操作,但是控制盘继续转到其终端位置,在该位置使摄像机的快门机构 打开相机的曝光定时电路,并进一步启动与场景相关的曝光定时操作。

    Focussing system
    14.
    发明授权
    Focussing system 失效
    聚焦系统

    公开(公告)号:US4240727A

    公开(公告)日:1980-12-23

    申请号:US2938

    申请日:1979-01-12

    CPC分类号: G02B7/30

    摘要: A first photodetector arrangement comprises three adjoining photodetectors, and a second comprises six. First and second optics, and the two photodetector arrangements, are located immovable on the camera, and the optics project onto the first arrangement an image of a subject which is to form the basis of a subject-distance measurement, without shift between image and photodetectors of the first arrangement so long as the subject-distance is within one of the ranges the system is to furnish; whereas the image projected onto the second photodetector arrangement shifts relative thereto in dependence upon the distance to the subject. The six photodetectors of the second arrangement are subdivided, for signal-processing purposes, into four successive groups, respectively comprised of the first, second and third photodetector, the second, third and fourth, the third, fourth and fifth, etc. A plurality of comparisons are performed by signal-evaluating circuitry, on the basis of absolute-value versions of the differences between the output signals of individual photodetectors in the first arrangement and in successive photodetector-groups within the second arrangement, to automatically ascertain, sequentially or non-sequentially, which photodetector-group in the second photodetector arrangement is in receipt of an image best corresponding to that cast onto the first photodetector arrangement, thereby determining the subject-distance setting best corresponding to the true subject-distance value.

    摘要翻译: 第一光电检测器装置包括三个相邻的光电检测器,第二光检测器装置包括六个。 第一和第二光学器件和两个光电检测器装置位于照相机上不可移动,并且光学器件投射到第一布置上,以形成被摄物体的图像,其将形成被摄体距离测量的基础,而不会在图像和光电检测器之间移动 只要主体距离在系统提供的范围之内; 而投射到第二光电检测器装置上的图像依赖于与被摄体的距离而相对于其移动。 第二布置的六个光电检测器用于信号处理目的被细分成四个连续的组,分别由第一,第二和第三光电检测器,第二,第三和第四,第三,第四和第五等组成。多个 基于第一布置中的各个光电检测器的输出信号与第二布置中的连续光电探测器组之间的差异的绝对值版本,信号评估电路执行比较以自动确定 相继地,第二光电检测器装置中的哪个光电检测器组接收到与第一光电检测器装置上的投射最佳对应的图像,从而确定对应于真实对象距离值的最佳对象距离设置。

    Radiation-emissive focussing system with integration of the signals
produced by the system's detector arrangement
    15.
    发明授权
    Radiation-emissive focussing system with integration of the signals produced by the system's detector arrangement 失效
    辐射发射聚焦系统与系统检测器装置产生的信号集成

    公开(公告)号:US4268137A

    公开(公告)日:1981-05-19

    申请号:US28186

    申请日:1979-04-09

    CPC分类号: G01S7/486 G02B7/32

    摘要: Pulses of radiation are emitted from the camera to the subject, reflected back to the camera, and incident upon two detectors. The successive pulses produced by the two detectors are applied to respective integrators which trip respective threshold circuits when and if their integral signals reach the threshold value. This inherently reduces detector and other noise present in the processing circuitry. A tolerance-range counter ascertains whether or not, after one threshold circuit is tripped, the other becomes tripped within a predetermined time interval.

    摘要翻译: 辐射脉冲从相机发射到被摄体,反射回相机,并入射到两个检测器上。 由两个检测器产生的连续脉冲被施加到各自的积分器,当它们的积分信号达到阈值时,它们跳闸相应的阈值电路。 这固有地减少处理电路中存在的检测器和其他噪声。 公差范围计数器确定在一个阈值电路跳闸之后,另一个阈值电路是否在预定时间间隔内跳闸。

    Focussing system for cameras
    16.
    发明授权
    Focussing system for cameras 失效
    照相机聚焦系统

    公开(公告)号:US4251145A

    公开(公告)日:1981-02-17

    申请号:US59207

    申请日:1979-07-19

    CPC分类号: G01S7/486 G02B7/32

    摘要: First and second photodetector signals, whose relative amplitudes depend upon focus error, are integrated to form respective first and second integral signals whose relative rates of change are dependent upon focus error. Each integral signal is applied to two comparators, one whose threshold level is reached first and the other having a threshold level which would be reached second. When one or the other of the two integral signals reaches its first-reached threshold level, this applies a corresponding signal to the data input of a respective flip-flop, and when this faster-changing integral signal then reaches its second-reached threshold level this clocks both such flip-flops. The time elapsing between the faster-changing integral signal reaching its first-reached and then its second-reached threshold level constitutes a tolerance interval, during which the slower-changing integral signal is given an opportunity to try to reach its respective first-reached threshold level. If the slower-changing integral signal reaches its first-reached threshold level within the tolerance interval, then a corresponding signal is applied to the data input of its associated flip-flop as well before the two flip-flops are clocked, with the result that the states of the two flip-flops are the same as if both integral signals had indentical rates of change of value.

    摘要翻译: 其相对幅度取决于聚焦误差的第一和第二光电检测器信号被积分以形成相对的第一和第二积分信号,其相对变化率取决于聚焦误差。 每个积分信号被施加到两个比较器,其阈值电平首先达到,另一个具有将达到第二阈值电平。 当两个积分信号中的一个或另一个达到其第一达到的阈值电平时,这将相应的信号施加到相应触发器的数据输入端,并且当该更快的变化的积分信号然后达到其第二达到的阈值电平 这样就会使这两个触发器同时进行。 在快速变化的积分信号达到其首次达到阈值水平之间经过的时间构成了容限间隔,在此期间,较慢变化的积分信号被给予尝试达到其相应的第一达到阈值的机会 水平。 如果较慢变化的积分信号在公差范围内达到其首次达到的阈值电平,则在两个触发器被计时之前,相应的信号被施加到其相关联的触发器的数据输入端,结果是 两个触发器的状态与两个积分信号具有不同的价值变化率相同。

    Digital control system for automatic-focus cameras
    18.
    发明授权
    Digital control system for automatic-focus cameras 失效
    用于自动对焦相机的数字控制系统

    公开(公告)号:US4344024A

    公开(公告)日:1982-08-10

    申请号:US272557

    申请日:1981-06-11

    申请人: Istvan Cocron

    发明人: Istvan Cocron

    IPC分类号: G03B3/10 G03B7/08 G05B1/06

    CPC分类号: G03B3/10 G03B7/08

    摘要: A digital control circuit for use in automatic-focus cameras is disclosed, which is suitable for use in self-focusing systems which determine focus by means of triangulation. The system corrects for motor oscillation about a state of proper focus, defocusing caused by inertia, and for an inability to evaluate proper state of focus caused by large distances between the camera and a subject.

    摘要翻译: 公开了一种用于自动对焦照相机的数字控制电路,其适用于通过三角测量确定焦点的自聚焦系统。 该系统针对正确对焦的状态,惯性引起的散焦以及无法评估相机和被摄体之间的大距离引起的适当对焦状态,来校正电机振动。

    Unidirectional focussing system
    19.
    发明授权
    Unidirectional focussing system 失效
    单向聚焦系统

    公开(公告)号:US4303319A

    公开(公告)日:1981-12-01

    申请号:US52962

    申请日:1979-06-26

    CPC分类号: G02B7/34

    摘要: At the start of each focussing operation, the camera objective is at a first extreme subject-distance setting and is moved in a first direction therefrom towards the second extreme subject-distance setting. A focus-evaluating circuit comprises first and second photodetectors located to receive light from the subject and a comparing circuit which compares the light incident on the photodetectors and in dependence upon the present subject-distance setting generates first and second signals respectively indicating that the subject-distance setting should be changed in the first direction or in the opposite second direction, such circuit having bidirectional character and furthermore establishing a tolerance range of acceptable distance-setting error within which both the first and second signals are generated. During the unidirectional change of subject-distance setting, the appearance of the first signal leads to generation of a stop signal commanding that the progressive change of distance setting be stopped. Accordingly, the unidirectional change of setting is commanded to stop at the point where the changing distance setting just enters into the tolerance range of the bidirectional evaluating circuitry.

    摘要翻译: 在每个聚焦操作开始时,相机物镜处于第一极限被摄体距离设置,并且从其朝向第二极距物体距离设定的第一方向移动。 焦点评估电路包括位于接收来自被摄体的光的第一和第二光电探测器以及比较电路,其比较入射在光电探测器上的光并根据本目标距离设置产生分别表示被摄体的第一和第二信号, 应在第一方向或相反的第二方向上改变距离设置,这种电路具有双向字符,并且进一步建立可产生第一和第二信号的可接受的距离设定误差的公差范围。 在对象距离设置的单向改变期间,第一信号的出现导致产生停止信号,停止距离设定的逐渐变化。 因此,设定的单向变化被命令在变化距离设定刚刚进入双向评估电路的公差范围的点停止。