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    • 3. 发明授权
    • Power focus device in a camera
    • 电源对焦设备在相机中
    • US4864344A
    • 1989-09-05
    • US298337
    • 1989-01-17
    • Kazuhiko ArakawaRyuichi Kobayashi
    • Kazuhiko ArakawaRyuichi Kobayashi
    • G02B7/08G03B3/10
    • G03B3/10G02B7/08
    • A power focus device in a camera has a manually rotatively operated focus ring, a lens driving drive source for driving a focusing lens, and a pulse generating device operatively associated with the rotation of the focus ring to generate a pulse signal conforming to the amount of rotation of the focus ring. A focus ring rotation direction detecting device detects the direction of rotation of the focus ring from the pulse signal, a focus ring rotation amount detecting device detects the amount of rotation of the focus ring from the pulse signal, and a drive direction setting device sets the direction of drive of the lens driving drive source on the basis of the result of the detection in the focus ring rotation direction detecting device. A drive amount setting device memorizes the result of the detection in the focus ring rotation amount detecting device and sets the memorized value as the amount of drive of the lens driving drive source. A drive source control device control the lens driving drive source in accordance with the direction of drive set in the drive direction setting device and the amount of drive set in the drive amount setting device. A reversing device immediately reverses the lens driving drive source, changes the setting in the drive direction setting device, returns the drive amount setting device to its initial state, and immediately reverses the lens driving drive source when the focus ring has been rotatively operated in a direction to drive the lens driving drive source in a second direction when the lens driving drive source is being driven in a first direction.
    • 相机中的功率对焦装置具有手动旋转操作的聚焦环,用于驱动聚焦透镜的透镜驱动驱动源和与聚焦环的旋转可操作地相关联的脉冲产生装置,以产生符合 聚焦环的旋转。 聚焦环旋转方向检测装置从脉冲信号检测聚焦环的旋转方向,聚焦环旋转量检测装置根据脉冲信号检测聚焦环的旋转量,驱动方向设定装置 基于聚焦环旋转方向检测装置的检测结果,透镜驱动驱动源的驱动方向。 驱动量设定装置将检测结果存储在聚焦环旋转量检测装置中,并将存储值设定为透镜驱动驱动源的驱动量。 驱动源控制装置根据驱动方向设定装置的驱动方向和设定在驱动量设定装置中的驱动量来控制镜头驱动驱动源。 反转装置立即反转透镜驱动驱动源,改变驱动方向设定装置的设定,将驱动量设定装置返回到其初始状态,并且当聚焦环已经被旋转操作时立即反转透镜驱动驱动源 方向,当透镜驱动驱动源在第一方向上被驱动时,沿第二方向驱动透镜驱动驱动源。
    • 5. 发明授权
    • Camera having a focus detecting apparatus
    • 具有焦点检测装置的相机
    • US4774539A
    • 1988-09-27
    • US102011
    • 1987-09-28
    • Yasuo SudaKazuhiko ArakawaKeiji OhtakaTakeshi KoyamaIchiro Ohnuki
    • Yasuo SudaKazuhiko ArakawaKeiji OhtakaTakeshi KoyamaIchiro Ohnuki
    • G02B7/34G03B3/00
    • G02B7/346
    • In a camera provided with a focus detecting apparatus in which the object light passed through a photo-taking lens is limited in its passage area by a field mask, the secondary image of an object to be photographed is obtained by a secondary imaging optical system and the secondary image is received by a line sensor and the imaging condition of the photo-taking lens is detected on the basis of the photoelectrically converted output of the line sensor, the opening area of the field mask is set so that the secondary image of the object to be photographed is directed to the both sides of the line sensor, and spot photometering sensors are disposed on the both sides of the line sensor and in the area to which the secondary image is applied, so that the photometering center of gravity is positioned substantially on the line sensor.
    • 在设置有焦点检测装置的相机中,通过摄像镜头的物体光通过场屏蔽被限制在其通过区域中,通过次级成像光学系统获得要拍摄的被摄体的二次图像, 次级图像被线传感器接收,并且基于线传感器的光电转换输出来检测摄影镜头的成像条件,设置场掩模的开口面积,使得二次图像 要拍摄的物体被引导到线传感器的两侧,并且点测光传感器设置在线传感器的两侧以及在施加二次图像的区域中,使得测光重心位于 基本上在线传感器上。