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    • 11. 发明申请
    • FOCUS DETECTION DEVICE
    • 聚焦检测装置
    • US20110273608A1
    • 2011-11-10
    • US13017761
    • 2011-01-31
    • Shinichi TSUKADA
    • Shinichi TSUKADA
    • H04N5/232
    • H04N5/23212G02B7/36G03B3/10G03B13/36H04N5/3696H04N9/045
    • A focus detection device includes: a defocus information detection unit that detects phase difference information indicating a phase difference manifested by a pair of images formed with a pair of light fluxes having passed through different areas of a photographic optical system and detects defocus information based upon the phase difference information; and a correction unit that executes correction for correcting the defocus information, detected by the defocus information detection unit, in correspondence to a predetermined direction extending between a first direction that orthogonally intersects an optical axis of the photographic optical system and radially extends from the optical axis and a second direction that orthogonally intersects the first direction.
    • 焦点检测装置包括:散焦信息检测单元,其检测指示由通过摄影光学系统的不同区域的一对光束形成的一对图像表现的相位差的相位差信息,并基于该焦点信息检测散焦信息 相位差信息; 以及校正单元,其执行校正,用于校正由散焦信息检测单元检测的散焦信息,所述校正单元对应于在与摄影光学系统的光轴正交的第一方向和从光轴延伸的预定方向 以及与第一方向垂直相交的第二方向。
    • 12. 发明申请
    • FOCUS DETECTION DEVICE, PHOTOGRAPHIC LENS UNIT, IMAGE-CAPTURING APPARATUS AND CAMERA SYSTEM
    • 焦点检测装置,摄影镜头单元,图像拍摄装置和相机系统
    • US20110205423A1
    • 2011-08-25
    • US12877421
    • 2010-09-08
    • Shinichi Tsukada
    • Shinichi Tsukada
    • H04N5/232
    • H04N5/3696G02B7/38G03B3/10G03B13/36H04N5/23212
    • A focus detection device includes: a focus detection unit that includes a pair of light-receiving element arrays and lens systems via which a pair of focus detection light fluxes are each guided to one of the pair of light-receiving element arrays, and detects an image shift amount based upon output signals output from the pair of light-receiving element arrays; an acquisition unit that obtains a plurality of sets of opening data pertaining to sizes and positions of a plurality of openings; a function value calculation unit that calculates, based upon the plurality of sets of opening data, a function value pertaining to a gravitational center distance between gravitational centers of a pair of overlapping areas where a pair of specific focus detection pupils overlap an exit pupil; and a conversion unit that converts the image shift amount to a defocus amount based upon the function value.
    • 焦点检测装置包括:焦点检测单元,其包括一对受光元件阵列和透镜系统,通过该一对光接收元件阵列和透镜系统,一对焦点检测光束被引导到该对受光元件阵列之一,并且检测 基于从所述一对光接收元件阵列输出的输出信号的图像偏移量; 获取单元,其获得与多个开口的尺寸和位置有关的多组开放数据; 功能值计算单元,其基于所述多组打开数据,计算与一对特定焦点检测瞳孔与出射瞳孔重叠的一对重叠区域的重力中心之间的重力中心距离的功能值; 以及转换单元,其基于该功能值将图像偏移量转换为散焦量。
    • 14. 发明授权
    • Focus detector having light deflector near image forming plane
    • 在图像形成平面附近具有光偏转器的聚焦探测器
    • US6002121A
    • 1999-12-14
    • US4313
    • 1998-01-08
    • Shinichi Tsukada
    • Shinichi Tsukada
    • G03B13/36G02B7/08G02B7/34G01J1/20G03B3/00
    • G02B7/346
    • To perform accurate focus detection using a wide range of injected luminous flux from a photographic lens, a deflecting plate, which deflects the injected luminous flux of the photographic optical system in the vertical direction with respect to the direction of a pair of entrance pupils of a focus detecting optical system, is provided at, or near, a predetermined image forming plane of the photographic optical system. By this structure, the entrance pupils of the focus detecting optical system can be spread in a direction vertical to the focus detecting direction, and the focus detecting accuracy can be improved by using a wider range of the injected luminous flux of the focus detecting optical system.
    • 为了使用来自摄影镜头的各种注入的光通量进行准确的焦点检测,偏转板使照相光学系统的注入的光通量相对于一对入射光瞳的垂直方向偏离 焦点检测光学系统,设置在摄影光学系统的预定图像形成平面处或附近。 通过这种结构,聚焦检测光学系统的入射光瞳可以在垂直于焦点检测方向的方向上扩展,并且可以通过使用焦距检测光学系统的注入的光通量的范围较宽来提高焦点检测精度 。
    • 15. 发明授权
    • Photographic lens focusing system and method which compensates for size
of aperture
    • 摄影镜头聚焦系统和补偿孔径尺寸的方法
    • US5854948A
    • 1998-12-29
    • US859213
    • 1997-05-20
    • Shinichi Tsukada
    • Shinichi Tsukada
    • G03B13/36G02B7/28G03B13/02G03B13/22
    • G03B13/22G02B7/28
    • A focus setting system for a camera in which a photographer can observe a focused subject image in a viewfinder and which corrects the focus prior to exposure such that a photographed picture is in focus. Specifically, the focusing system corrects for errors introduced by varying apertures. The focusing system has a photographic lens which has a memory for storing focus error data which represents focusing adjustment values from an open aperture to a number of predetermined apertures. A focus detection device detects a focused state of the photographic lens using a portion of the incident light rays of the photographic lens. A first drive unit drives the photographic lens by calculating a focus drive amount which achieves focus at open aperture. The focus drive amount is calculated from the focus error data and the focus state detected by the focus detection device. A second drive unit drives the photographic lens by calculating a second focus drive amount which sets the focus for a predetermined aperture based on the focus error data and the focused state detected by the focus detection device.
    • 一种用于照相机的焦点设置系统,其中摄影者可以观察取景器中的聚焦对象图像,并且其在曝光之前校正焦点,使得拍摄的图像是焦点。 具体来说,聚焦系统校正由不同孔径引入的误差。 聚焦系统具有摄影镜头,其具有用于存储聚焦误差数据的存储器,该聚焦误差数据表示从开孔到多个预定孔径的聚焦调节值。 焦点检测装置使用摄影透镜的入射光线的一部分来检测摄影镜头的聚焦状态。 第一驱动单元通过计算在开放孔径下实现焦点的聚焦驱动量来驱动摄影镜头。 由聚焦误差数据和焦点检测装置检测到的聚焦状态计算聚焦驱动量。 第二驱动单元通过计算基于由焦点检测装置检测的聚焦误差数据和聚焦状态来设定预定孔径的焦点的第二聚焦驱动量来驱动摄影透镜。
    • 16. 发明授权
    • Camera having a focus detection device and interchangeable lens
    • 相机具有焦点检测装置和可互换镜头
    • US5347340A
    • 1994-09-13
    • US136108
    • 1993-10-14
    • Shinichi Tsukada
    • Shinichi Tsukada
    • G02B7/28G03B7/20G03B13/36G03B17/14
    • G02B7/28G03B13/36G03B17/14
    • A focus detection device for a camera which corrects the focal point position of an interchangeable camera lens. The focal point position is corrected according to data indicating interchangeable lens characteristics, and according to data indicating characteristics of a focus detection device. The data indicating characteristics of the interchangeable lens is data representing the field curvature of the interchangeable lens which is stored in a memory located in the interchangeable lens. The data indicating characteristics of the focus detection device is data representing the size of a detection aperture of the focus detection device, a direction of detection, and a position of the detection region within a photographic image surface. This data is stored in a memory located in the camera. Reliable focal point correction may be performed when the interchangeable lens is mounted on a camera loaded with a focus detection device having optional detection aperture size, detection direction, and detection position. Furthermore, the quantity of data which has to be stored in the memory of the interchangeable lens is decreased. Focal point correction for an interchangeable lens may also be performed when plural focus detection devices in the camera perform focal point detection in plural detection regions.
    • 一种用于校正可更换相机镜头的焦点位置的相机的焦点检测装置。 根据指示可互换透镜特性的数据,根据指示焦点检测装置的特性的数据校正焦点位置。 指示可互换镜头的特性的数据是表示存储在位于可互换镜头中的存储器中的可互换镜头的场曲率的数据。 指示焦点检测装置的特征的数据是表示焦点检测装置的检测孔径的大小,检测方向以及检测区域在摄影图像表面内的位置的数据。 该数据存储在相机中的存储器中。 当可互换镜头安装在装有具有可选检测孔径尺寸,检测方向和检测位置的焦点检测装置的相机上时,可以执行可靠的焦点校正。 此外,必须存储在可互换镜头的存储器中的数据量减少。 当摄像机中的多个焦点检测装置在多个检测区域中执行焦点检测时,也可以执行可互换镜头的焦点校正。
    • 20. 发明授权
    • Focus detection device, focus detection method, and camera
    • 焦点检测装置,焦点检测方法和相机
    • US08676051B2
    • 2014-03-18
    • US12355409
    • 2009-01-16
    • Shinichi Tsukada
    • Shinichi Tsukada
    • G03B13/34
    • G03B13/34G02B7/34
    • A focus detection device includes a focus detector, an object detector, a selector, a divider, and a controller. The focus detector is configured to detect a plurality of focus adjusting states at focus detecting positions in an image plane of an optical system. The object detector is configured to detect image information corresponding to a specified object in an image of the optical system. The selector is configured to select focus adjusting states among the plurality of focus adjusting states based on the image information detected by the object detector. The divider is configured to find variation in the selected focus adjusting states and configured to divide the selected focus adjusting states into a plurality of groups based on the variation. The controller is configured to find a final focus adjusting state based on a pre-final focus adjusting state in a group selected from the plurality of groups.
    • 焦点检测装置包括焦点检测器,物体检测器,选择器,分隔器和控制器。 焦点检测器被配置为在光学系统的图像平面中的焦点检测位置处检测多个焦点调节状态。 对象检测器被配置为检测与光学系统的图像中的指定对象相对应的图像信息。 选择器被配置为基于由对象检测器检测到的图像信息来选择多个焦点调整状态中的焦点调整状态。 分配器被配置为找到所选择的焦点调整状态的变化,并且被配置为基于该变化将所选择的焦点调整状态划分成多个组。 控制器被配置为基于从多个组中选择的组中的预最终焦点调整状态来找到最终聚焦调整状态。