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    • 32. 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。
    • 33. 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。
    • 38. 发明授权
    • Focus detecting device for use with cameras
    • 与摄像机一起使用的聚焦检测设备
    • US5138143A
    • 1992-08-11
    • US733961
    • 1991-07-22
    • Tokuji IshidaMasataka Hamada
    • Tokuji IshidaMasataka Hamada
    • G02B7/34
    • G02B7/34
    • A focus detecting device is provided with first and second line sensors and first and second image forming lenses which are located behind a predetermined focal plane of the objective lens to receive the object lights for forming first and second images on the first and second line sensors, respectively. The image signal generated by the first line sensor is divided into a plurality of block signals each consisting of a predetermined number of picture element outputs and each block signal is compared with groups of picture element outputs of the second line sensor, with the groups shifted sequentially, to find a group which best coincides therewith and the distance between the first and second images on the line sensors is calculated in accordance with the shift position of the group thus determined, for calculation of the amount and direction of defocus of the object image on the focal plane. The calculated distance between the first and second images may be corrected in accordance with manual adjustment of adjustable means and magnification data of the first and second images stored in storage means.