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公开(公告)号：US3973267A
公开(公告)日：1976-08-03
申请号：US534578
申请日：1974-12-19
CPC分类号： G03B7/085
摘要： The present invention relates to an exposure control apparatus for a camera which is so designed that the output terminal of the light measuring circuit of the brightness of the object to be photographed having a photo electric transducing means is connected to one input terminal of an operation amplifier. The output of the photographing information setting circuit, having a variable resistance means for setting other photographing informations than the information of the brightness of the object to be photographed, is connected to the other input terminal of the above mentioned operation amplifier. This is done in such a manner that proper exposure conditions can be obtained by means of the output of the exposure control circuit connected to the output of the above mentioned operation amplifier. Each input signal to the operational amplifier is adjusted by a bias signal which is controlled in accordance with ambient temperature conditions.
摘要翻译： 本发明涉及一种照相机的曝光控制装置，其被设计成使得具有光电转换装置的被拍摄对象的亮度的光测量电路的输出端子连接到运算放大器的一个输入端 。 具有用于设置其他拍摄信息的可变电阻装置的拍摄信息设置电路的输出与被拍摄对象的亮度的信息相连接，连接到上述运算放大器的另一输入端。 这样可以通过连接到上述运算放大器的输出的曝光控制电路的输出来获得适当的曝光条件。 通过根据环境温度条件控制的偏置信号来调整到运算放大器的每个输入信号。
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公开(公告)号：US4086582A
公开(公告)日：1978-04-25
申请号：US711968
申请日：1976-08-05
申请人： Takehiko Kiyohara , Tokuichi Tsunekawa , Mutsunobu Yazaki , Noriaki Sanada , Tetsuya Taguchi , Zenzo Nakamura
发明人： Takehiko Kiyohara , Tokuichi Tsunekawa , Mutsunobu Yazaki , Noriaki Sanada , Tetsuya Taguchi , Zenzo Nakamura
CPC分类号： G03B15/05 , G03B7/16 , G03B2215/0503 , G03B2217/005
摘要： An exposure control device in which the output of a light measuring circuit which produces an electrical signal corresponding to the brightness of an object is compared with an output of a level signal circuit which produces an electrical signal of a predetermined level. When the compared value reaches a predetermined value, a flash circuit is made ready to flash, whereby the shutter time is changed over to a predetermined time suited for a flash photography and the flash circuit is made to flash in association with the shutter operation and the shutter is controlled with a constant time.
摘要翻译： 一种曝光控制装置，其将产生与物体的亮度相对应的电信号的光测量电路的输出与产生预定电平的电信号的电平信号电路的输出进行比较。 当比较值达到预定值时，使闪光灯准备闪光，由此将快门时间切换到适合于闪光摄影的预定时间，并且使快闪电路与快门操作相关联地闪烁，并且 快门以恒定时间控制。
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公开(公告)号：US4168893A
公开(公告)日：1979-09-25
申请号：US825705
申请日：1977-08-18
CPC分类号： G03B7/20
摘要： An exposure control device for a single lens reflex camera has an exposure calculating mechanism for determining the amount of exposure in accordance with desired shutter time, aperture value, film sensitivity and brightness of the object to be photographed. The exposure calculating mechanism is carried along one external wall of a casing for the reflex mirror of the camera.
摘要翻译： 用于单镜头反光相机的曝光控制装置具有曝光计算机构，用于根据期望的快门时间，光圈值，胶片感光度和待拍摄对象的亮度确定曝光量。 曝光计算机构沿照相机反射镜的外壳的一个外壁传送。
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公开(公告)号：US4176929A
公开(公告)日：1979-12-04
申请号：US917375
申请日：1978-06-20
申请人： Fumio Ito , Tokuichi Tsunekawa , Tetsuya Taguchi , Isao Harigaya
发明人： Fumio Ito , Tokuichi Tsunekawa , Tetsuya Taguchi , Isao Harigaya
CPC分类号： G03B19/12 , G03B7/09908 , G03B7/09974
摘要： An exposure control device for a camera, having a first light receiving element for sensing light beams reflected from a film surface and a second light receiving element for sensing light beams from an object before taking a photograph. In this arrangement an auxiliary diaphragm, which is opened as a shutter is closed and is closed as the shutter is opened, is provided in front of the second light receiving element. The first and second light receiving elements are connected in parallel between input terminals of an operational amplifier for the light measuring. Accordingly, an exposure control with a high degree of accuracy is effected based on an output of the light measuring operational amplifier.
摘要翻译： 一种用于照相机的曝光控制装置，具有用于感测从膜表面反射的光束的第一光接收元件和用于在拍摄照片之前感测来自物体的光束的第二光接收元件。 在这种布置中，当第二光接收元件的前面设置有作为快门而打开的辅助光阑被关闭并且当快门打开时被关闭。 第一和第二光接收元件并联连接在用于光测量的运算放大器的输入端之间。 因此，基于光测量运算放大器的输出实现高精度的曝光控制。
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公开(公告)号：US4114036A
公开(公告)日：1978-09-12
申请号：US703962
申请日：1976-07-09
CPC分类号： H05K1/0254 , G03B7/083 , H01J40/14 , H05K2201/09781
摘要： A leak current suppressing printed circuit board in which the input circuit is so designed that between the input terminals a light sensing photoelectric converting element operating in the current mode is connected. The input is guarded by means of the circuit net, whose potential is same as that at the input terminal of the inverting input circuit or the non-inverting input circuit of the high input impedance operation amplifier.
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公开(公告)号：US4076977A
公开(公告)日：1978-02-28
申请号：US644317
申请日：1975-12-24
摘要： The present invention relates to a light measuring circuit consisting of an operational amplifier, a feed back path connected with said operational amplifier, a photo voltaic cell and a switching circuit for bringing the input terminals of said operational amplifier to the same potential at the time light measurement is commenced. By means of this switching circuit connected to the light measuring circuit the delayed response of the light measuring circuit due to the stray capacitence existing between the input terminal of the operational amplifier and ground is remarkably improved.
摘要翻译： 光测量电路技术领域本发明涉及一种由运算放大器，与所述运算放大器连接的反馈路径，光伏单元和切换电路组成的光测量电路，所述开关电路将所述运算放大器的输入端在时间点处相同电位 测量开始。 通过连接到光测量电路的开关电路，由于存在于运算放大器的输入端和地之间的杂散电容导致的光测量电路的延迟响应显着提高。
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公开(公告)号：US4156564A
公开(公告)日：1979-05-29
申请号：US906913
申请日：1978-05-17
申请人： Tokuichi Tsunekawa , Tetsuya Taguchi , Fumio Ito , Isao Harigaya
发明人： Tokuichi Tsunekawa , Tetsuya Taguchi , Fumio Ito , Isao Harigaya
CPC分类号： G03B7/083
摘要： A filter for compensation of spectral sensitivity is provided in front of a light receiving element through a light shielding tube. A light source emitting such light as having wave length characteristics which fall within a sensitive wave length zone of the light receiving element yet fall outside of transmitting wave length zone of the filter is provided between the filter and the light receiving element. Light from outside irradiates the light receiving element through the filter while light from the light source is so controlled as irradiating the light receiving element but not leaking through the filter to outside, so that the light from the light source can irradiate the light receiving element without any relationship with the irradiation of outside light on the light receiving element.
摘要翻译： 在光接收元件前面通过遮光管提供用于补偿光谱灵敏度的滤光器。 在滤光器和光接收元件之间设置有发射具有落在光接收元件的敏感波长区域内的波长特性的光的光源，而不在滤光器的透射波长区域的外侧。 来自外部的光通过滤光器照射光接收元件，同时来自光源的光被照射到光接收元件而不通过滤光器泄漏到外部，从而来自光源的光可以照射光接收元件而没有 与光接收元件上的外部光的照射的任何关系。
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公开(公告)号：US4083059A
公开(公告)日：1978-04-04
申请号：US717950
申请日：1976-08-26
申请人： Tokuichi Tsunekawa , Zenso Nakamura , Tetsuya Taguchi , Masanori Uchidoi , Hiroshi Aizawa , Takashi Uchiyama
发明人： Tokuichi Tsunekawa , Zenso Nakamura , Tetsuya Taguchi , Masanori Uchidoi , Hiroshi Aizawa , Takashi Uchiyama
CPC分类号： G03B15/05 , G03B2215/05 , G03B2215/0514
摘要： In a camera provided with a day-light exposure range and with a flash exposure range, an automatic exposure control system for controlling the iris of the camera in accordance with a computed exposure value and a preselected shutter time is associated with a flash exposure time range bracketing device in order to insure that the formation of a correct flash exposure aperture is effected with automatic selection of one of the bracketed exposure times despite an accidentally incorrect setting of the shutter dial of the camera which may be encountered particularly when the day-light exposure range is to be left for the flash exposure range without the necessary manipulation of the shutter dial therefor. The bracketing device of the present invention comprises three timing circuits in combination with a selector responsive to the position of the shutter dial for selecting either the first, or the second, or the third timing circuit for cooperation with an electronic switch controlling the period of actuation of the camera shutter when the shutter dial is set either within, or on the faster side of, or on the slower side of a possible flash exposure time range respectively, whereby the resultant actuation period is equal to either the shutter time preselected on the shutter dial, or the faster limit of, or the slower limit of the flash exposure time range respectively.
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公开(公告)号：US4636053A
公开(公告)日：1987-01-13
申请号：US138316
申请日：1980-04-08
摘要： A distance detecting device comprising radiation projecting means for projecting a radiation beam; radiation sensing means which is disposed away from the radiation projecting means with a given length and is arranged to receive a reflected radiation beam coming from an object whose distance is to be detected as the radiation beam is projected from the projecting means; and movable means for relatively varying the incident condition of the projected radiation beam onto the sensing means. The distance to the object is found either by the position of the movable means or by the amount of displacement thereof which occurs at a time point at which the sensing means optimally receive the reflected radiation beam coming from the object in the process of relatively varying the incident condition of the projected radiation beam onto the sensing means. In the incident condition varying process, the output signal of the sensing means and a delayed signal which is obtained by delaying the output signal a predetermined period of time are compared with each other to detect a time point at which the output signal of the sensing means has reached its peak level and, accordingly, to detect when the sensing means optimally recieve the reflected radiation beam coming from the object.
摘要翻译： 一种距离检测装置，包括用于投影辐射束的辐射投射装置; 放射线检测装置，其以特定长度远离辐射投射装置设置，并被布置为当辐射束从突出装置突出时，接收来自待检测距离的物体的反射辐射束; 以及用于将投射的辐射束的入射状态相对变化到感测装置上的可移动装置。 通过可移动装置的位置或通过在相对变化的过程中感测装置最佳地接收来自物体的反射辐射束的时间点发生的距离来发现到物体的距离 投影辐射束到感测装置上的入射条件。 在入射条件变化处理中，将预定时间段的输出信号延迟获得的感测装置的输出信号和延迟信号进行比较，以检测感测装置的输出信号的时间点 已经达到其峰值水平，并因此检测感测装置何时最佳地接收到来自物体的反射辐射束。
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公开(公告)号：USRE31207E
公开(公告)日：1983-04-12
申请号：US58198
申请日：1979-07-17
CPC分类号： H05K1/0254 , G03B7/083 , H01J40/14 , H05K2201/09781
摘要： A leak current suppressing printed circuit board in which the input circuit is so designed that between the input terminals a light sensing photoelectric converting element operating in the current mode is connected. The input is guarded by means of the circuit net, whose potential is same as that at the input terminal of the inverting input circuit or the non-inverting input circuit of the high input impedance operation amplifier.
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