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    • 1. 发明授权
    • Photometric apparatus for single lens reflex camera
    • 单镜反光相机光度测量仪
    • US4065777A
    • 1977-12-27
    • US717089
    • 1976-08-24
    • Yoshihisa MaitaniKunio ShimoyamaMuneaki YoshidaAkihiko HashimotoMasahiro Kitagawa
    • Yoshihisa MaitaniKunio ShimoyamaMuneaki YoshidaAkihiko HashimotoMasahiro Kitagawa
    • G03B7/083G03B7/099G03B7/08
    • G03B7/083G03B7/09974
    • A photometric apparatus for single lens reflex camera and of the type in which an exposure value is determined by photometry of light which is transmitted through a photographic optical system and is reflected by at least one of the surfaces of a shutter blind and a film, said apparatus comprising a photoelectric transducer element for receiving light reflected by at least one of the surfaces of a shutter blind and a film, and an operational amplifier for biasing the photoelectric transducer element to maintain the voltage applied thereacross substantially null, thereby enabling a photometric output of the photoelectric transducer element to be effectively derived even when the amount of light received is minimal. The shutter blind is provided with a surface upon which at least two portions thereof have different coefficients of reflectivity to reduce adverse effects of reflected light upon the desired exposure period.
    • 一种用于单镜头反光照相机的测光装置,其中曝光值由通过照相光学系统透射并由快门帘和薄膜的至少一个表面反射的光的测光确定的类型,所述光测量装置 该装置包括用于接收由快门遮罩和薄膜的至少一个表面反射的光的光电换能器元件和用于偏置光电换能器元件的运算放大器,以保持其上施加的电压基本上为零,从而使得能够进行光度输出 即使当接收到的光量很小时,光电传感器元件也被有效地导出。 百叶窗具有表面,在该表面上,其至少两部分具有不同的反射系数,以减少反射光对所需曝光周期的不利影响。
    • 3. 发明授权
    • Photometric apparatus for single lens reflex camera
    • 单镜反光相机光度测量仪
    • US4104654A
    • 1978-08-01
    • US717087
    • 1976-08-24
    • Yoshihisa MaitaniKunio ShimoyamaMuneaki YoshidaAkihiko HashimotoMasahiro Kitagawa
    • Yoshihisa MaitaniKunio ShimoyamaMuneaki YoshidaAkihiko HashimotoMasahiro Kitagawa
    • G03B7/083G03B7/099G03B7/08
    • G03B7/083G03B7/09974G03B7/09976
    • A photometric apparatus for single lens reflex camera and of the type in which an exposure value is determined by photometry of light which is transmitted through a photographic optical system and is reflected by at least one of the surfaces of a shutter blind and a film, said apparatus comprising a photoelectric transducer element for receiving light reflected by at least one of the surfaces of a shutter blind and a film, and an operational amplifier for biasing the photoelectric transducer element to maintain the voltage applied thereacross substantially null, thereby enabling a photometric output of the photoelectric transducer element to be effectively derived even when the amount of light received is minimal. A second photoelectric transducer element is provided for receiving reflected light from the reflecting mirror that is adapted to be switched between the viewfinder light path and the photographic light path and display means for displaying the operation of the shutter dependent upon the light which is incident upon the aforesaid second transducer element.
    • 一种用于单镜头反光照相机的测光装置,其中曝光值由通过照相光学系统透射并由快门帘和薄膜的至少一个表面反射的光的测光确定的类型,所述光测量装置 该装置包括用于接收由快门遮罩和薄膜的至少一个表面反射的光的光电换能器元件和用于偏置光电换能器元件的运算放大器,以保持其上施加的电压基本上为零,从而使得能够进行光度输出 即使当接收到的光量很小时,光电传感器元件也被有效地导出。 第二光电换能器元件被提供用于接收来自反射镜的反射光,其适于在取景器光路和摄影光路之间切换,以及显示装置,用于显示取决于入射在该光源上的光的快门的操作 上述第二换能器元件。
    • 4. 发明授权
    • Photometric apparatus for single lens reflex camera
    • 单镜反光相机光度测量仪
    • US4064517A
    • 1977-12-20
    • US717088
    • 1976-08-24
    • Yoshihisa MaitaniKunio ShimoyamaMuneaki YoshidaAkihiko HashimotoMasahiro Kitagawa
    • Yoshihisa MaitaniKunio ShimoyamaMuneaki YoshidaAkihiko HashimotoMasahiro Kitagawa
    • G03B7/083G03B7/099G03B7/08G03B17/20
    • G03B7/083G03B7/09974G03B7/09976
    • A photometric apparatus for single lens reflex camera and of the type in which an exposure value is determined by photometry of light which is transmitted through a photographic optical system and is reflected by at least one of the surfaces of a shutter blind and a film, said apparatus comprising a photoelectric transducer element for receiving light reflected by at least one of the surfaces of a shutter blind and a film, and an operational amplifier for biasing the photoelectric transducer element to maintain the voltage applied thereacross substantially null, thereby enabling a photometric output of the photoelectric transducer element to be effectively derived even when the amount of light received is minimal. The photometric apparatus, including a photoelectric transducer element, a photometry switch and associated circuitry are mounted upon a printed circuit board mounted within the camera to position the transducer element to receive reflected light from the film or the shutter.
    • 一种用于单镜头反光照相机的测光装置,其中曝光值由通过照相光学系统透射并由快门帘和薄膜的至少一个表面反射的光的测光确定的类型,所述光测量装置 该装置包括用于接收由快门遮罩和薄膜的至少一个表面反射的光的光电换能器元件和用于偏置光电换能器元件的运算放大器,以保持其上施加的电压基本上为零,从而使得能够进行光度输出 即使当接收到的光量很小时,光电传感器元件也被有效地导出。 包括光电换能器元件,测光开关和相关电路的测光装置安装在安装在相机内的印刷电路板上,以定位换能器元件以接收来自胶片或快门的反射光。
    • 6. 发明授权
    • Electrical focal plane shutter with mechanical control mechanism
operative upon electromagnetic failure
    • 具有机械控制机构的电焦平面快门在电磁故障时起作用
    • US4024553A
    • 1977-05-17
    • US577697
    • 1975-05-15
    • Yoshihisa MaitaniAkihiko HashimotoFujio Enomoto
    • Yoshihisa MaitaniAkihiko HashimotoFujio Enomoto
    • G03B7/26G03B9/08G03B9/32G03B9/58G03B9/34
    • G03B9/32G03B9/58
    • An electrical focal plane shutter is provided of a type in which subsequent to a running of a first blind of the shutter, a second blind of the shutter is constrained from movement by an electromagnet until a desired exposure period passes, whereupon the electromagnet is deenergized to permit a running of the second blind. The electromagnet is controlled by an electromagnet control device including a light receiving element which is used for photometry. The shutter includes a shutter detent mechanism for preventing a shutter release operation when an electric storage battery contained in an associated camera is exhausted. The shutter further includes a high speed shutter operation control mechanism which assures against the instability of the operation of the electromagnet when the shutter is operating at a high speed, and also includes a manual shutter control mechanism for establishing a shutter operation period of a given length in a purely mechanical manner.
    • 提供了一种电焦平面快门,其中在快门的第一盲人行进之后,快门的第二个遮挡物被电磁铁的运动限制到所需的曝光周期过去,于是电磁体被断电到 允许第二个盲人的跑步。 电磁体由包括用于测光的光接收元件的电磁控制装置控制。 快门包括用于当包含在相关联的照相机中的蓄电池耗尽时防止快门释放操作的快门定位机构。 快门进一步包括高速快门操作控制机构,其确保当快门以高速操作时电磁体的操作的不稳定性,并且还包括用于建立给定长度的快门操作周期的手动快门控制机构 以纯粹的机械方式。
    • 9. 发明授权
    • Single lens reflex camera
    • 单镜头反光相机
    • US4306791A
    • 1981-12-22
    • US94473
    • 1979-11-15
    • Akihiko HashimotoTamotsu KoiwaiToyohiko Kimura
    • Akihiko HashimotoTamotsu KoiwaiToyohiko Kimura
    • G03B15/03G03B19/12G03B15/05
    • G03B15/03G03B2215/0514G03B2215/056
    • A single lens reflex camera is provided which has a planar area for mounting a light emitting component such as an electronic flash thereon. The planar area is defined by at least a portion of top surface of a body of the camera which is located on one side of a pentaprism housing disposed centrally on the top surface, and is at a lower level than the remainder of the top surface which is located on the opposite side of the pentaprism housing. The planar area is formed with a threaded bore for mounting the light emitting component, and is also provided with a terminal connector having a plurality of terminals inclusive of a synchro contact terminal, an illumination control signal terminal and a power supply terminal.
    • 提供了一种单透镜反光照相机,其具有用于安装诸如电子闪光灯之类的发光部件的平面区域。 平面区域由相机的主体的顶表面的至少一部分限定,该至少一部分位于位于顶表面中心的五棱镜壳体的一侧上,并且处于比顶表面的其余部分更低的水平 位于五棱镜房屋的对面。 平面区域形成有用于安装发光部件的螺纹孔,并且还设置有具有包括同步接触端子,照明控制信号端子和电源端子在内的多个端子的端子连接器。