公开(公告)号：US5099266A

公开(公告)日：1992-03-24

申请号：US634283

申请日：1990-12-26

申请人： Yuji Nakajima ,  Isamu Ishii

发明人： Yuji Nakajima ,  Isamu Ishii

IPC分类号： G01C3/06 ,  G01S7/491 ,  G02B7/32 ,  G03B13/36

CPC分类号： G02B7/32 ,  G01S17/48 ,  G01S7/4911 ,  G01S7/4815

摘要： A range meter for a camera includes a row of light sources for propagating light to a subject from different directions, and a receiver for receiving reflected light. The receiver provides an output corresponding to a spot thereon at which light is received. The light sources are energized selectively, so that the light sources at the end of the row emit less than the light sources at the center of the row.

摘要翻译： 用于照相机的量程表包括用于从不同方向将光传播到被摄体的一行光源和用于接收反射光的接收器。 接收器提供对应于其上接收光的点的输出。 光源被选择性地激励，使得行的端部处的光源比行的中心处的光源少。

公开(公告)号：US5444511A

公开(公告)日：1995-08-22

申请号：US144827

申请日：1993-10-29

申请人： Yoichi Seki ,  Hiroyuki Saito ,  Akira Ito ,  Isamu Ishii ,  Yoshiyuki Iwamatsu

发明人： Yoichi Seki ,  Hiroyuki Saito ,  Akira Ito ,  Isamu Ishii ,  Yoshiyuki Iwamatsu

IPC分类号： G02B7/32 ,  G03B13/36

CPC分类号： G02B7/32

摘要： A distance measuring device may be constructed utilizing a reduced number of components by calculating distance on the basis of the duration of an integration. Pulsed light is projected toward an object. A selecting circuit selectively outputs one of a pair of output voltages from two current-voltage converting circuits, each of which is connected to a position sensitive device which is configured to receive light reflected from the object. A variable-gain amplifying circuit is used for amplifying the selected output voltage and for producing an amplified output voltage. The output voltage of the amplifying circuit is integrated by an integrating circuit. Reference voltage generating circuitry generates two reference voltages having different levels and a comparing circuit compares the output voltage of the integrating circuit with one of a pair of reference voltages. Gain selecting circuitry is used for determining the gain of the variable-gain amplifying circuit on the basis of the output result of the comparing circuit. The distance to the object is determined in accordance with the duration of time that integration is performed by the integrating circuit until the integrated output voltage exceeds one of the reference voltages. Thus, distance may be determined in accordance with the magnitude of the integrated output voltage, the number of times integration is performed or the number of light projections performed by the device.

摘要翻译： 可以通过基于积分的持续时间计算距离来利用减少数量的部件来构造距离测量装置。 脉冲光被投射到物体上。 选择电路选择性地输出来自两个电流 - 电压转换电路的一对输出电压中的一个，每个电流电压转换电路连接到位置敏感器件，位置敏感器件被配置为接收从物体反射的光。 可变增益放大电路用于放大所选择的输出电压并产生放大的输出电压。 放大电路的输出电压由积分电路集成。 参考电压产生电路产生具有不同电平的两个参考电压，并且比较电路将积分电路的输出电压与一对参考电压中的一个进行比较。 增益选择电路用于根据比较电路的输出结果确定可变增益放大电路的增益。 根据由积分电路进行积分的持续时间直到积分输出电压超过基准电压之一来确定到物体的距离。 因此，可以根据集成输出电压的大小，执行积分的次数或由装置执行的光投影的数量来确定距离。

公开(公告)号：US4959680A

公开(公告)日：1990-09-25

申请号：US372729

申请日：1989-06-28

申请人： Hiroaki Ishida ,  Ichiro Nemoto ,  Koji Sato ,  Atsushi Takami ,  Yoichi Nakano ,  Isamu Ishii ,  Yoshiyuki Iwamatsu

发明人： Hiroaki Ishida ,  Ichiro Nemoto ,  Koji Sato ,  Atsushi Takami ,  Yoichi Nakano ,  Isamu Ishii ,  Yoshiyuki Iwamatsu

IPC分类号： G03B7/08 ,  G03B9/08

CPC分类号： G03B9/08 ,  G03B7/0807 ,  G03B2217/005

摘要： A camera system of the type having a lens shutter, a focal-plane shutter, an aperture defined by the lens shutter, and a camera lens, includes a selector circuit which sets an operation mode to either a lens shutter mode in which the lens shutter is operated as a programmed shutter or a focal-plane shutter mode in which the shutter speed is controlled by the focal-plane shutter and the aperture of the camera system is controlled by the lens shutter; a first driving system which controls the lens shutter; a second driving system which controls the time during which the focal-plane shutter is operated; a sequential control circuit which controls the timing of the first and second driving systems; a setting circuit which sets the focal length of the camera lens; an arithmetic circuit which produces an output signal in response to the brightness of the subject, the distance to the subject, the focal length of the lens and the sensitivity of the film; and a switching circuit which switches the operation mode to the focal-plane shutter mode irrespective of the setting of the selector circuit when the exposure value to be controlled exceeds the programmed exposure value of the lens shutter and for switching either the operation mode or the shutter speed in accordance with the set focal length to prevent photographic blurring during camera shake, in response to the output from the arithmetic circuit.

摘要翻译： 具有透镜快门，焦平面快门，由透镜快门限定的孔和相机透镜的类型的相机系统包括选择器电路，其将操作模式设置为透镜快门模式，其中透镜快门 作为编程快门或焦平面快门模式操作，其中快门速度由焦平面快门控制，相机系统的孔径由镜头快门控制; 控制透镜快门的第一驱动系统; 控制焦平面快门操作的时间的第二驱动系统; 控制第一和第二驱动系统的定时的顺序控制电路; 设置摄像机镜头的焦距的设置电路; 算术电路，其响应于被摄体的亮度，到被摄体的距离，透镜的焦距和胶片的灵敏度产生输出信号; 以及当要控制的曝光值超过镜头快门的编程曝光值并且用于切换操作模式或快门时，切换电路将操作模式切换到焦平面快门模式，而不管选择器电路的设置如何 根据设定焦距的速度，以防止在相机抖动期间的照相模糊，以响应于运算电路的输出。

公开(公告)号：US5737649A

公开(公告)日：1998-04-07

申请号：US419815

申请日：1995-04-11

申请人： Yoshiyuki Iwamatsu ,  Isamu Ishii ,  Shinichi Endo

发明人： Yoshiyuki Iwamatsu ,  Isamu Ishii ,  Shinichi Endo

IPC分类号： G03B7/26 ,  G03B17/28

CPC分类号： G03B7/26

摘要： A camera powered by a battery has a first memory area for storing first data used in operating the camera and for retaining the first data irrespective of a power source interruption in the camera, and a second memory area powered by the battery for storing second data which is dependent upon the first data. A power interruption in the camera, such as occurs when the battery is exhausted or replaced, is detected by comparing the first data stored in the first memory area with the second data stored in the second memory area. After detection of a power interruption, the camera is initialized and the first data stored in the first memory area is then copied into the second memory area. Since the first memory area and the second memory area are compared each time the camera is activated, the state of the battery can be reliably checked.

摘要翻译： 由电池供电的相机具有第一存储区域，用于存储用于操作相机的第一数据，并且用于保持第一数据，而不管相机中的电源中断，以及由电池供电的第二存储区域，用于存储第二数据， 取决于第一个数据。 通过将存储在第一存储器区域中的第一数据与存储在第二存储器区域中的第二数据进行比较来检测相机中的电源中断，例如当电池耗尽或更换时发生的电源中断。 在检测到电源中断之后，相机被初始化，并且存储在第一存储器区域中的第一数据然后被复制到第二存储器区域中。 由于在每次相机被激活时比较第一存储区域和第二存储器区域，因此可以可靠地检查电池的状态。