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    • 61. 发明授权
    • Automatic focus adjusting apparatus
    • 自动对焦调节装置
    • US4888609A
    • 1989-12-19
    • US186882
    • 1988-08-09
    • Masataka HamadaTokuji IshidaYasuaki Akada
    • Masataka HamadaTokuji IshidaYasuaki Akada
    • G02B7/36
    • G02B7/36
    • An automatic focus adjusting apparatus for adjusting automatically a focus condition of an objective lens includes a CCD array for receiving light from an object and producing a accumulated charge signal representing the accumulated charge. Using the accumulated charge signal it is detected whether or not the brightness of the object is above a predetermined level, and at the same time, the focusing condition of the objective lens is calculated. Using the calculated result, the focusing condition of the objective lens is adjusted in a controlled manner such that: when the brightness of the object is above the predetermined level, the objective lens moves even during the CCD array is operated to carry out the charge accumulation; but when the brightness of the object is below the predetermined level, the CCD array is operated only during when the objective lens is making no movement.
    • 用于自动调节物镜的聚焦条件的自动聚焦调节装置包括用于从物体接收光并产生表示累积电荷的累积电荷信号的CCD阵列。 使用累积的充电信号,检测物体的亮度是否高于预定水平,并且同时计算物镜的聚焦状态。 使用计算结果,以受控的方式调节物镜的聚焦状态,使得:当物体的亮度高于预定水平时,即使在CCD阵列期间,物镜也移动以执行电荷累积 ; 但是当物体的亮度低于预定水平时,CCD阵列仅在物镜不移动时才起作用。
    • 62. 发明授权
    • Device with a discriminating priority system
    • 具有辨别优先权系统的设备
    • US4864117A
    • 1989-09-05
    • US186132
    • 1988-06-09
    • Tokuji IshidaKatsumi KozakaiMasataka Hamada
    • Tokuji IshidaKatsumi KozakaiMasataka Hamada
    • G02B7/34
    • G02B7/34
    • In a focus detection system for detecting focus condition of an objective lens, there is disposed a pair of photo sensor arrays each having a plurality of photo cells lined up in one diection to receive a first image and second image passed through respectively a lens system and the photo sensor arrays produce first original signal groups and second original signal groups each signal groups corresponding to light intensity of the images projected thereto. A processing device processes the original signal groups in such a manner that the first original signal groups are respectively divided into a plurality of blocks, and one of the blocks of the first original signal groups is selected and it is detected that in what group in the selected block best coincidence occurs.
    • 在用于检测物镜的聚焦条件的焦点检测系统中,设置一对光传感器阵列,每个光传感器阵列具有沿一个二维排列的多个光电池,以接收分别透过透镜系统的第一图像和第二图像, 光传感器阵列产生第一原始信号组和第二原始信号组,每个信号组对应于投射到其上的图像的光强度。 处理装置以这样的方式处理原始信号组,使得第一原始信号组分别被分成多个块,并且选择第一原始信号组的块中的一个,并且检测到在 选择块最佳重合。
    • 64. 发明授权
    • Camera flash light control circuitry
    • 相机闪光灯控制电路
    • US4542975A
    • 1985-09-24
    • US580351
    • 1984-02-15
    • Tokuji IshidaHiroshi Hosomizu
    • Tokuji IshidaHiroshi Hosomizu
    • G03B7/16G03B15/05
    • G03B7/16
    • In a flash photography system including an electronic flash device adapted to be combined with a camera which is adapted to transmit first and second signals to an electronic flash device and to receive third and fourth signals therefrom, and wherein the third signal informs the camera of the completed preparation for flash light emission; the first signal directs the electronic flash device to initiate flash light emission; the fourth signal directs the camera to initiate light measurement upon flash light emission; and the second signal directs the electronic flash device to terminate flash light emission in accordance with the light measurement. The electronic flash device incorporates a flash light emitting device, storage of electric power for operation of the flash light emitting device, a circuit for generating the third signal with the stored electric power exceeding a predetermined level, first, second and third terminals connected to the camera for respectively receiving the first signal, transmitting the third signal, and receiving the second signal; circuitry for initiating flash light emission in response to the first signal; circuitry for providing the fourth signal in response to the first signal; and circuitry for terminating flash light emission in response to the second signal. The circuitry is capable of modifying the third signal into the fourth signal in response to the first signal and changing the third signal into different voltages depending upon the electric power stored; and modifying the third voltage into the fourth signal if the stored power exceeds a predetermined level. Circuitry enables the third signal to connect with the second terminal in the absence of the first signal and to transmit to the second terminal the fourth signal in place of the third signal in response to the first signal.
    • 一种闪光摄影系统,包括适于与照相机组合的电子闪光灯装置,适用于将第一和第二信号传送到电子闪光装置并从其接收第三和第四信号,并且其中第三信号通知照相机 完成闪光灯的准备; 第一信号引导电子闪光装置启动闪光发光; 第四个信号指示相机在闪光灯发光时启动光测量; 并且第二信号引导电子闪光装置根据光测量终止闪光发光。 电子闪光灯装置包括闪光发光装置,用于闪光发光装置的操作的电力的存储,用于产生具有超过预定电平的存储电力的第三信号的电路,连接到闪光发光装置的第一,第二和第三端子 相机,用于分别接收第一信号,发送第三信号,以及接收第二信号; 响应于第一信号启动闪光发射的电路; 用于响应于第一信号提供第四信号的电路; 以及用于响应于第二信号终止闪光发射的电路。 电路能够响应于第一信号将第三信号修改为第四信号,并且根据存储的电力将第三信号改变成不同的电压; 以及如果所存储的功率超过预定水平,则将所述第三电压修改为所述第四信号。 在没有第一信号的情况下,电路使得第三信号能够与第二终端连接,并且响应于第一信号而将第四信号代替第三信号发送到第二终端。
    • 65. 发明授权
    • Electronic flash device
    • 电子闪光装置
    • US4469419A
    • 1984-09-04
    • US418210
    • 1982-09-15
    • Tokuji IshidaHiroshi Hosomizu
    • Tokuji IshidaHiroshi Hosomizu
    • G03B7/16G03B15/05G03B17/18
    • G03B7/16
    • In a flash photography system wherein an electronic flash is fired to illuminate an object to be photographed, a light measuring circuit measures the light reflected from the object and generates a stop signal when the integration of the measured light attains a given level, and the flash firing is interrupted in response to the stop signal, an indication is made when the stop signal is generated within a predetermined period from the generation of a synchro signal for firing the flash tube in conjunction with shutter opening, the period is longer than the period required for the flash tube to fully emit its light, i.e. consuming fully the charge stored in the main capacitor. The period may be approximately equal to or a little longer than a maximum flash synchronizable shutter speed. Thus, there is an indication that a proper flash photography has been made, not only when the flash firing is interrupted before the flash tube has emitted the light fully, but also when a proper exposure is attained after the full light emission of the flash tube.
    • 在闪光照相系统中,电子闪光灯被点亮以照射待拍摄的物体,光测量电路测量从物体反射的光,并且当所测量的光的积分达到给定水平时产生停止信号,闪光灯 响应于停止信号中断点火,当在与快门打开结合的闪光灯管的同步信号的产生之后的预定时间内产生停止信号时,进行指示,该期间长于所需时间 用于闪光管充分发光,即完全消耗存储在主电容器中的电荷。 该周期可以近似等于或长于最大闪光可同步快门速度的长度。 因此,不仅在闪光灯完全发光之前闪光灯闪光中断时,还有在闪光管全光发射之后达到适当曝光的情况下,存在适当的闪光摄影的指示 。
    • 67. 发明授权
    • Diaphragm control device for cameras
    • 相机用隔膜控制装置
    • US4288150A
    • 1981-09-08
    • US201312
    • 1980-10-27
    • Tokuji Ishida
    • Tokuji Ishida
    • G03B7/085G03B7/089G03B7/091G03B7/093G03B7/095G03B7/097
    • G03B7/095
    • A diaphragm control device of the type which performs TTL light measurement while stopping-down a diaphragm is constructed to automatically determine the diaphragm aperture by comparing an approximate signal with a reference signal to minimize the diaphragm aperture determination error caused when timewise variations are involved in the scene brightness. The approximate signal is generated by various circuits on the basis of a light measurement signal obtained by the TTL light measurement. The approximate signal varies approximately with the change in the diaphragm aperture due to the stopping-down operation of the diaphragm and coincides with the light measurement signal when no timewise variations are involved in the scene brightness.
    • 在隔膜的同时进行TTL光测量的膜片控制装置被构造成通过将近似信号与参考信号进行比较来自动确定光阑孔径,以最小化当时间变化涉及的光阑孔径确定误差 场景亮度 基于通过TTL光测量获得的光测量信号,由各种电路产生近似信号。 由于膜片的停止操作,近似信号随着光阑孔径的变化而变化,与场景亮度中没有时间变化相关的光测量信号一致。