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    • 4. 发明授权
    • Focus condition detecting device
    • 聚焦条件检测装置
    • US4716434A
    • 1987-12-29
    • US945879
    • 1986-12-23
    • Nobuyuki TaniguchiTokuji IshidaMasataka HamadaToshihiko KarasakiToshio Norita
    • Nobuyuki TaniguchiTokuji IshidaMasataka HamadaToshihiko KarasakiToshio Norita
    • G03B13/36G02B7/34G03B3/00
    • G02B7/34
    • A focus condition detecting device which generated first and second light intensity distribution signals representing light intensity distributions on first and second arrays arranged to receive lights having passed through different areas of the exit pupil of an objective lens is arranged so as to divide the first light intensity distribution signal into a plurality of blocks. Each of the portions of the first light intensity distribution signal belonging to the respective blocks is shifted relative to the second light intensity distribution signal by sequentially changing an amount of shift, so that correlations therebetween are calculated for finding the amount of shift providing the highest correlation. In accordance with the amount of shift found to provide the highest correlation through the correlation calculation with use of the portion of the first light intensity distribution signal belonging to one of the blocks, the shift range for the succeeding correlation calculation with use of the portion of the first light intensity distribution signal belonging to another one of the blocks is restricted to shorten the period of time required for the succeeding correlation calculation.
    • 一种聚焦条件检测装置,其生成表示第一和第二阵列上的光强度分布的第一和第二光强分布信号,所述第一和第二阵列布置成接收通过物镜的出射光瞳的不同区域的光,以便将第一光强度 分配信号分成多个块。 属于各个块的第一光强分布信号的每个部分相对于第二光强分布信号通过顺序地改变偏移量而偏移,从而计算它们之间的相关性,以找出提供最高相关性的偏移量 。 根据通过使用属于其中一个块的第一光强分布信号的部分的相关计算提供最高相关性的移位量,用于随后的相关计算的偏移范围,使用 限于属于另一个块的第一光强分布信号以缩短后续相关计算所需的时间。
    • 8. 发明授权
    • Focus detecting optical system including two prisms for light refraction
    • 聚焦检测光学系统包括两个棱镜用于光折射
    • US4808808A
    • 1989-02-28
    • US5088
    • 1987-01-20
    • Toshihiko KarasakiTokuji IshidaMasataka HamadaToshio NoritaNobuyuki Taniguchi
    • Toshihiko KarasakiTokuji IshidaMasataka HamadaToshio NoritaNobuyuki Taniguchi
    • G03B13/36G02B7/34G01J1/20
    • G02B7/343
    • A focus detecting optical system including a condenser lens disposed in a vicinity of or rearwardly of a predetermined focal plane of a photographic lens, an image forming lens unit having a pair of image forming lens sections disposed symmetrically relative to a main optical axis, a light blocking member having an opening for regulating a luminous flux coming into the image forming lens unit, a first prism for refracting the luminous flux in a direction departing from the main optical axis, a second prism for refracting the luminous flux in a direction nearing the main optical axis and a light receiving element array. An image formed on the light receiving element array and formed of the luminous flux carried through the condenser lens, the first prism, one of the image forming lens sections and the second prism and an image formed on the light receiving element array and formed of the luminous flux carried through the condenser lens, the first prism, the other image forming lens section and the second prism are placed with a sufficient distance therebetween by working of the first and second prisms. A focus detecting operation is carried out by comparing these images.
    • 一种焦点检测光学系统,包括设置在摄影透镜的预定焦平面附近或之后的聚光透镜,成像透镜单元,具有相对于主光轴对称设置的一对成像透镜部分,光 具有用于调节进入图像形成透镜单元的光束的开口的阻挡构件,用于在离开主光轴的方向折射光通量的第一棱镜,用于沿接近主光线的方向折射光通量的第二棱镜 光轴和光接收元件阵列。 形成在光接收元件阵列上的由形成在聚光透镜,第一棱镜,图像形成透镜部分和第二棱镜中的一个的光束形成的图像和形成在光接收元件阵列上并由 通过聚光透镜携带的光束,第一棱镜,其他成像透镜部分和第二棱镜通过第一和第二棱镜的加工而放置在其间具有足够的距离。 通过比较这些图像来进行焦点检测操作。
    • 9. 发明授权
    • Camera with a multi-zone focus detecting device
    • 相机配有多区域对焦检测装置
    • US5218395A
    • 1993-06-08
    • US587560
    • 1990-09-21
    • Nobuyuki TaniguchiTokuji IshidaToshio NoritaMasataka HamadaToshihiko Karasaki
    • Nobuyuki TaniguchiTokuji IshidaToshio NoritaMasataka HamadaToshihiko Karasaki
    • G02B7/34G02B7/36
    • G02B7/34G02B7/36
    • A camera with a multi-zone focus detecting device has an objective lens mounted on a camera. An image formed by the objective lens is divided into a plurality of zones. In each zone, a focusing condition is detected based on the image formed by the objective lens so as to produce a plurality of focusing condition data. Based on the result of the focusing conditions, one zone is selected. Furthermore, a light which has passed through the objective lens is measured separately in each zone so as to produce a plurality of measured light data. Based on a focusing condition data obtained from the selected zone, the objective lens is driven to an infocus condition. When the objective lens is driven to the infocus condition, a measured light data obtained from the selected zone is used for calculating exposure data with which the exposure is controlled.
    • 具有多区域焦点检测装置的相机具有安装在相机上的物镜。 由物镜形成的图像被分成多个区域。 在每个区域中,基于由物镜形成的图像来检测聚焦条件,以产生多个聚焦条件数据。 根据聚焦条件的结果,选择一个区域。 此外,在每个区域分别测量已经通过物镜的光,以便产生多个测量的光数据。 基于从所选择的区域获得的聚焦条件数据,物镜被驱动到聚焦条件。 当物镜被驱动到聚焦条件时,从所选择的区域获得的测量光数据被用于计算曝光被控制的曝光数据。