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    • 2. 发明授权
    • Photographic camera
    • 摄影相机
    • US4806961A
    • 1989-02-21
    • US196809
    • 1988-05-18
    • Masatoshi KamitaniManabu InoueMotohiro NakanishiHiroshi OotsukaYoshinobu KudoYoshiaki Hata
    • Masatoshi KamitaniManabu InoueMotohiro NakanishiHiroshi OotsukaYoshinobu KudoYoshiaki Hata
    • G03B17/12G03B17/04G03B3/10
    • G03B17/04
    • A photographic camera having a photographic lens system freely settable to various focal lengths, an openable and closable lens cover disposed in front of the photographic lens system, an opening and closing mechanism for the lens cover, a motor for providing kinetic energy for the focal length changeover operations of the photographic lens system and also for the opening and closing operations of the lens cover, and a drivable cylinder capable of transmitting the kinetic energy from the motor to the photographic lens system and to the opening and closing mechanism in the form of a mechanical displacement. The opening and closing mechanism opens the lens cover by utilizing a mechanical displacement from a home position to an intermediate position of the drivable cylinder and closes the same by utilizing a mechanical displacement from the intermediate position to the home position of the drivable cylinder, and further changes over a focal position by utilizing mechanical displacements reversibly between the intermediate position and an end position of the drivable cylinder.
    • 具有可自由设定为各种焦距的摄影透镜系统的照相机,设置在摄影镜头系统前方的可开闭的镜头盖,用于镜头盖的打开和关闭机构,用于为焦距提供动能的电动机 照相镜头系统的切换操作以及镜头盖的打开和关闭操作以及能够将动力从电动机传递到照相镜头系统的可驱动气缸和开关机构,其形式为 机械位移。 打开和关闭机构通过利用从可驱动气缸的原始位置到中间位置的机械位移来打开透镜盖,并通过利用从可驱动气缸的中间位置到原始位置的机械位移来关闭它,并且进一步 通过在可驱动气缸的中间位置和终端位置之间可逆地利用机械位移来改变焦点位置。
    • 5. 发明授权
    • Distance measuring system
    • 距离测量系统
    • US5191384A
    • 1993-03-02
    • US631225
    • 1990-12-21
    • Motohiro NakanishiHiroshi Ootsuka
    • Motohiro NakanishiHiroshi Ootsuka
    • G01S17/08G01S17/46G02B7/32
    • G01S17/48G01S17/08G02B7/32
    • A distance measuring system of the active type for measuring a distance ranging from a short distance to a long distance with a high degree of accuracy. The system comprises light emitting means, three or more light receiving elements, and a selecting means for selecting output signals of different selected pairs of light receiving elements when the light emitting means emits light for first and second times for measuring distances within short and long distance ranges, respectively. The output signals in each selected pair are compared with one another to obtain ratios between them, and distances are calculated based on the ratios thus obtained. A distance to the object is then determined based on the calculated distances. Where the distance measuring system is incorporated in a camera, the lens of the camera is actuated in accordance with the distance value measured by the system.
    • 用于以高精度测量从短距离到远距离的距离的有源类型的距离测量系统。 该系统包括发光装置,三个或更多个光接收元件,以及选择装置,用于当发光装置发光以进行第一次和第二次以测量短距离和长距离内的距离时,选择不同选定的一对光接收元件的输出信号 范围。 将每个选择的对中的输出信号彼此进行比较以获得它们之间的比例,并且基于由此获得的比率来计算距离。 然后基于所计算的距离来确定到物体的距离。 在距离测量系统结合在照相机中的情况下,照相机的透镜根据系统测量的距离值来启动。
    • 6. 发明授权
    • Distance measuring system
    • 距离测量系统
    • US5963309A
    • 1999-10-05
    • US138621
    • 1993-10-18
    • Motohiro NakanishiHiroshi Ootsuka
    • Motohiro NakanishiHiroshi Ootsuka
    • G01S17/46G01S17/87G01C3/00G01C3/08G01C13/00
    • G01S17/46G01S17/87
    • A distance measuring system of the active type wherein a distance ranging from a short distance to a great distance can be measured with a high degree of accuracy in accordance with a ratio between outputs of two light receiving elements. The system comprises light emitting means which emits light twice to an object, three or more light receiving elements, and selecting means which selects output signals of different pairs of the light receiving elements when the light emitting means emits light for the first and second times for measurement of distances within short and long distance ranges, respectively. The selected output signals in each pair are compared with each other to take a ratio between them, and distances are calculated based on the ratios thus obtained. Finally, a distance to the object is determined based on the calculated two distances. Where the distance measuring system is incorporated in a camera, the lens of the camera is actuated in accordance with the distance value measured by the system.
    • 根据两个光接收元件的输出之间的比率,可以高精度地测量从短距离到远距离的距离的距离测量系统。 该系统包括对物体发光两次的发光装置,三个或更多个光接收元件,以及当发光装置第一次和第二次发光时,选择不同对的光接收元件的输出信号的选择装置 分别测量短距离和远距离范围内的距离。 将每对中选择的输出信号彼此进行比较以获得它们之间的比例,并且基于由此获得的比率来计算距离。 最后,基于计算出的两个距离来确定距离物体的距离。 在距离测量系统结合在照相机中的情况下,照相机的透镜根据系统测量的距离值来启动。
    • 8. 发明授权
    • Distance measuring apparatus
    • 距离测量仪
    • US4768053A
    • 1988-08-30
    • US945500
    • 1986-12-23
    • Motonobu MatsudaYoshihiro TanakaMotohiro NakanishiNobuyuki TaniguchiHiroshi Ootsuka
    • Motonobu MatsudaYoshihiro TanakaMotohiro NakanishiNobuyuki TaniguchiHiroshi Ootsuka
    • G01C3/06G01C3/00G01S17/46G02B7/28G03B13/36G03B3/00G01C3/08
    • G01S17/48G02B7/28
    • A distance measuring apparatus of the present invention converges the reflected light on objects through a converging lens and detects the light by a multi-divisional photodiode. The multi-divisional photodiode comprises a plural number of light receiving elements so that each of the light receiving elements detects the reflected light from the corresponding object to provide an electric signal according to the quantity of reflected light. The quantity of light in the peripheral portions of the flash or the converging lens is inherently smaller than the quantity of light in the central portion thereof. This distance measuring apparatus is improved so that a constant electric signal is obtained by any of the light receiving elements as far as the distance to the objects is constant. For example, such improvement is made in a manner in which: the quantity of received light of the central portion is limited by a filter provided between the converging lens and the multi-divisional photodiode; the light receiving areas of the light receiving elements are increased in peripheral portions of the multi-divisional photodiode compared with those in the central portion thereof; or the obtained electric signal is electrically corrected.
    • 本发明的距离测量装置通过会聚透镜会聚物体上的反射光,并通过多分辨光电二极管检测光。 多分光电二极管包括多个光接收元件,使得每个光接收元件检测来自相应物体的反射光,以根据反射光量提供电信号。 闪光灯或会聚透镜的周边部分的光量本质上小于其中心部分的光量。 该距离测量装置被改进,使得通过任何光接收元件获得恒定的电信号,只要距离物体的距离是恒定的。 例如,这样的改进方式是:中心部分的接收光量由设在会聚透镜和多分辨光电二极管之间的滤光器限制; 与其中央部分相比,多分辨光电二极管的周边部分的光接收元件的光接收面积增加; 或者所获得的电信号被电校正。