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    • 1. 发明授权
    • Optical system for detecting focusing condition
    • 用于检测聚焦条件的光学系统
    • US5037188A
    • 1991-08-06
    • US314128
    • 1989-02-23
    • Toshihiko KarasakiKazumi Sugitani
    • Toshihiko KarasakiKazumi Sugitani
    • G02B7/28G02B7/34
    • G02B7/346
    • An optical system for detecting focusing condition comprises a pair of image re-forming lenses and an aperture mask. The image re-forming lenses are configured with a pair of plano-convex lenses having equal radius of curvature R and an equal axial thickness T. R is nearly equal to T (R.apprxeq.T). The aperture mask has apertures corresponding to the respective plano-convex lenses and is attached closely to the flat surfaces of the plano-convex lenses. Comatic aberrations for the respective light fluxes passing through the apertures become nearly same, and therefore point images formed by the respective light fluxes also become nearly same. Consequently, high accuracy of focusing condition detection is established.
    • 用于检测聚焦条件的光学系统包括一对图像重新形成透镜和孔径掩模。 图像重新形成透镜由一对具有相同的曲率半径R和相等的轴向厚度T的平凸透镜构成.R几乎等于T(R APPROX T)。 孔径掩模具有对应于相应的平凸透镜的孔,并且紧密地附接到平凸透镜的平坦表面。 通过孔径的各光束的旋转像差变得几乎相同,因此由各个光束形成的点图像也变得几乎相同。 因此,建立了聚焦状态检测的高精度。
    • 2. 发明授权
    • Focus detecting device
    • 对焦检测装置
    • US5229807A
    • 1993-07-20
    • US741210
    • 1991-07-31
    • Toshihiko KarasakiKazumi Sugitani
    • Toshihiko KarasakiKazumi Sugitani
    • G02B7/34
    • G02B7/346
    • A focus detecting device which comprises an objective lens for forming an image of an object, a condenser lens, located behind a predetermined focal plane of the objective lens, for converging the light passed through the objective lens, a pair of image re-forming lenses, located behind the condenser lens, for re-forming a pair of secondary images of the image formed by the objective lens on an off-axial region of the objective lens located at a position far from the optical axis thereof, a light direction changing device, located nearby the condenser lens, for changing the direction along which light bundles forming the secondary images passes towards the optical axis, and a light receiving device for receiving the pair of the secondary images formed by the secondary image forming device to produce a light intensity distribution signal representing the light intensity distribution of the secondary images, a focus condition calculating device for calculating a focus condition of the objective lens by means of detecting the positions of the pair of the secondary images in accordance with the light intensity distribution signal.
    • 一种聚焦检测装置,包括用于形成物体的图像的物镜,聚光透镜,位于物镜的预定焦平面后面,用于会聚通过物镜的光,一对图像重构透镜 位于所述聚光透镜后面,用于在位于远离其光轴的位置处的物镜的偏轴区域上重新形成由所述物镜形成的图像的一对二次图像;光方向改变装置 位于聚光透镜附近,用于改变形成次级图像的光束朝向光轴的方向;以及光接收装置,用于接收由二次图像形成装置形成的一对次级图像,以产生光强度 分配信号,表示二次图像的光强度分布;焦点条件计算装置,用于计算ob的焦点条件 通过根据光强分布信号检测一对次级图像的位置来实现。
    • 3. 发明授权
    • Focus detection apparatus of camera
    • 相机焦点检测装置
    • US4949116A
    • 1990-08-14
    • US391923
    • 1989-08-10
    • Toshihiko KarasakiKazumi Sugitani
    • Toshihiko KarasakiKazumi Sugitani
    • G02B7/34
    • G02B7/346
    • A focus detection apparatus of a camera comprising a plurality of focus condition detecting units, each of which includes at least a pair of re-imaging lens forming a pair of secondary images using a pair of light rays passed through a photo-taking lens and a condenser lens, and a CCD (charge-coupled device) line sensor receiving the images and detecting a focus condition of the photo-taking lens. All of the focus detection areas defined by each of the focus condition detecting units are located parallel one another and overlaps partially at least one other focus detection area in a perpendicular direction to a direction in which all of the focus detection areas extend. Therefore, there is no space, where the focus condition cannot be detected, among the focus detection areas in the parallel direction in which all of the focus detection areas extend.
    • 一种照相机的焦点检测装置,包括多个聚焦条件检测单元,每个焦点条件检测单元至少包括一对重新成像透镜,其使用通过摄影镜头的一对光线形成一对二次图像,以及 聚光透镜和接收图像的CCD(电荷耦合器件)线传感器,并检测摄影镜头的聚焦条件。 由每个聚焦条件检测单元定义的所有焦点检测区域彼此平行,并且在与所有焦点检测区域延伸的方向垂直的方向上部分地与至少一个其他焦点检测区域重叠。 因此,在所有焦点检测区域延伸的并行方向的焦点检测区域中,不存在聚焦条件不能被检测到的空间。
    • 4. 发明授权
    • Focus detecting optical system
    • 聚焦检测光学系统
    • US4908504A
    • 1990-03-13
    • US368095
    • 1989-06-19
    • Toshihiko KarasakiKazumi Sugitani
    • Toshihiko KarasakiKazumi Sugitani
    • G03B13/36G02B7/28G02B7/34
    • G02B7/346
    • A focus detecting optical system is disclosed which includes an objective lens for forming an image of an object, a plurality of focus detecting blocks, and a focus condition calculating device for calculating a focus condition of the objective lens in accordance with the light intensity distribution signals produced by the plurality of the focus detecting blocks. Each of the focus detecting blocks includes a condenser lens located nearby a predetermined focal plane of the objective lens, a pair of image re-forming lenses located behind the condenser lens for reforming a pair of secondary images of the image formed by the objective lens, a mask plate having a pair of apertures through which light fluxes forming the secondary images pass and a light receiving unit for receiving the pair of the secondary images formed by the pair of image re-forming lenses to produce a light intensity distribution signal representative of the light intensity distribution of the secondary images. The apertures in the mask plate of at least one specified focus detecting block has a configuration different from that of the other focus detecting blocks.
    • 公开了一种聚焦检测光学系统,其包括用于形成物体的图像的物镜,多个焦点检测块和用于根据光强度分布信号计算物镜的聚焦条件的聚焦条件计算装置 由多个焦点检测块产生。 每个焦点检测块包括位于物镜的预定焦平面附近的聚光透镜,位于聚光透镜后面的一对图像重构透镜,用于重构由物镜形成的图像的一对二次图像, 具有一对孔径的掩模板,通过该孔口形成次级图像的光束通过;以及光接收单元,用于接收由一对图像重新形成透镜形成的一对次级图像,以产生表示该二次图像的光强分布信号 二次图像的光强分布。 至少一个指定焦点检测块的掩模板中的孔具有与其它焦点检测块不同的构造。
    • 5. 发明授权
    • Focus detecting device
    • 对焦检测装置
    • US4857718A
    • 1989-08-15
    • US193816
    • 1988-05-12
    • Toshihiko KarasakiKazumi Sugitani
    • Toshihiko KarasakiKazumi Sugitani
    • G02B3/08G02B7/34
    • G02B7/346G02B3/08
    • A focus detecting device has a plurality of focus detection blocks, which blocks reproduce images of an object once produced by an objective lens as a pair of images on first and second CCD line sensors arrayed in a line, by means of a condenser lens, a pair of re-imaging lenses, and an aperture mask having a pair of aperture openings provided in the proximity of the re-imaging lenses, which blocks detect the positions of the paired images formed on the CCD line sensors, and detects the focus condition of the objective lens. In the focus detecting device, a light shield member to prevent the incidence of harmful light on the CCD line sensors is provided between at least the condenser lens and the CCD line sensors.
    • 焦点检测装置具有多个焦点检测块,其通过聚光透镜阻止将由物镜一次产生的物体的图像再现成在一行排列的第一和第二CCD线传感器上的一对图像, 一对重新成像透镜和具有设置在重新成像透镜附近的一对孔径开口的孔径掩模,其阻挡检测在CCD线传感器上形成的成对图像的位置,并且检测聚焦条件 物镜。 在聚焦检测装置中,至少在聚光透镜和CCD线传感器之间设置防止CCD线传感器上的有害光的入射的遮光部件。
    • 6. 发明授权
    • Focus detecting device
    • 对焦检测装置
    • US4992818A
    • 1991-02-12
    • US191016
    • 1988-05-06
    • Toshihiko KarasakiKazumi Sugitani
    • Toshihiko KarasakiKazumi Sugitani
    • G03B13/36G02B7/28G02B7/34
    • G02B7/346
    • A focus detecting device which comprises an objective lens for forming an image of an object, a condenser lens, located behind a predetermined focal plane of the objective lens, for converging the light passed through the objective lens, a pair of image re-forming lenses, located behind the condenser lens, for re-forming a pair of secondary images of the image formed by the objective lens on an off-axial region of the objective lens located at a position far from the optical axis thereof, a light direction changing device, located nearby the condenser lens, for changing the direction along which light bundles forming the secondary images passes towards the optical axis, and a light receiving device for receiving the pair of the secondary images formed by the secondary image forming means to produce a light intensity distribution signal representing the light intensity distribution of the secondary images, a focus condition calculating device for calculating a focus condition of the objective lens by means of detecting the positions of the pair of the secondary images in accordance with the light intensity distribution signal.
    • 一种聚焦检测装置,包括用于形成物体的图像的物镜,聚光透镜,位于物镜的预定焦平面后面,用于会聚通过物镜的光,一对图像重构透镜 位于所述聚光透镜后面,用于在位于远离其光轴的位置处的物镜的偏轴区域上重新形成由所述物镜形成的图像的一对二次图像;光方向改变装置 位于聚光透镜附近,用于改变形成次级图像的光束朝向光轴的方向;以及光接收装置,用于接收由二次图像形成装置形成的一对二次图像,以产生光强度 分配信号,表示二次图像的光强度分布;聚焦条件计算装置,用于计算对象的聚焦条件 通过根据光强度分布信号检测一对次级图像的位置来实现。
    • 7. 发明授权
    • Focus detecting optical system
    • 聚焦检测光学系统
    • US4901102A
    • 1990-02-13
    • US225909
    • 1988-07-29
    • Toshihiko KarasakiKazumi Sugitani
    • Toshihiko KarasakiKazumi Sugitani
    • G02B7/28G02B7/34G03B13/36
    • G02B7/346
    • A focus detecting optical system comprises an objective lens for forming an image of an object, at least one condenser lens disposed behind a predetermined image plane of the objective lens for converging light passed through the objective lens, at least one pair of image re-forming lenses located behind the condenser lens for re-forming a pair of secondary images of the image formed by the objective lens, at least one pair of rows of light receiving elements arrayed in a single line behind and in alignment with the paired image re-forming lenses for detecting the paired secondary images, and a light deflecting member disposed between the image re-forming lenses and the element rows and separated from said image re-forming lenses by an air space for deflecting light fluxes forming the secondary images outwards in a direction of array of the element rows with respect to a center of the paired secondary images. By such a construction, a state of focus adjustment of the objective lens can be detected on the basis of a change of the position of the secondary images detected by the element rows.
    • 焦点检测光学系统包括用于形成物体的图像的物镜,设置在物镜的预定图像平面后方的至少一个聚光透镜,用于会聚穿过物镜的光,至少一对图像重新形成 位于聚光透镜后面的透镜,用于重新形成由物镜形成的图像的一对二次图像,至少一对排的光接收元件排成一行,并与成对的图像重新形成 用于检测成对的二次图像的透镜;以及设置在图像重新形成透镜和元件列之间的光偏转构件,并且通过空气空间与所述图像重新形成透镜分离,用于将形成次级图像的光束向外偏转 相对于成对副图像的中心的元素行的阵列。 通过这样的结构,可以基于由元件行检测到的次级图像的位置的变化来检测物镜的焦点调整状态。
    • 10. 发明授权
    • Drive unit provided with position detecting device
    • 驱动单元配有位置检测装置
    • US07315164B2
    • 2008-01-01
    • US11342408
    • 2006-01-30
    • Yoshiaki HataKazumi SugitaniRyuichi YoshidaShuichi FujiiHideaki NakanishiTakayuki HoshinoHirohisa Sueyoshi
    • Yoshiaki HataKazumi SugitaniRyuichi YoshidaShuichi FujiiHideaki NakanishiTakayuki HoshinoHirohisa Sueyoshi
    • G01B7/14
    • G01D5/145G02B7/08G03B3/10G03B5/00G03B2205/0069H02N2/025H02N2/062
    • A drive unit in accordance with the present invention is provided with a magnetic field generating member generating a magnetic field, a magnetic field detecting device constituted by first, second and third magnetic field detecting elements detecting the magnetic field, and a piezoelectric actuator moving the magnetic field generating member. When executing a relative positioning between the magnetic field generating member and the magnetic field detecting device on the basis of a detection result by the magnetic field detecting device, a first positioning is executed on the basis of the detection result of the first and second magnetic field detecting elements in a predetermined region, and a second positioning is executed on the basis of the detection result of the third magnetic field detecting element at a predetermined point apart from the predetermined region, within a movable range in which the magnetic field generating member moves. In accordance with the structure, it is possible to position the movable body at a high precision, even in the case that a plurality of position detecting points of the movable body of the drive unit exist at a wide interval.
    • 根据本发明的驱动单元设置有产生磁场的磁场产生构件,由检测磁场的第一,第二和第三磁场检测元件构成的磁场检测装置,以及将磁性元件移动的压电致动器 场产生部件。 基于磁场检测装置的检测结果,在磁场产生部件和磁场检测装置之间进行相对定位时,基于第一和第二磁场的检测结果执行第一定位 在预定区域内检测元件,并且在磁场产生构件移动的可移动范围内,基于第三磁场检测元件在与预定区域相隔的预定点处的检测结果来执行第二定位。 根据该结构,即使在驱动单元的可动体的多个位置检测点以大的间隔存在的情况下,也可以高精度地定位移动体。