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58 条记录 (耗时 0.026 秒)

    Beam splitting for camera using a multilayer film
    1.
    发明授权
    Beam splitting for camera using a multilayer film 失效
    使用多层膜拍照的光束分裂

    公开(公告)号：US06661579B2

    公开(公告)日：2003-12-09

    申请号：US09772967

    申请日：2001-01-31

    申请人： Kiyoshi Araki ,  Taku Ito ,  Isao Okuda ,  Masahiro Oono ,  Moriyasu Kanai

    发明人： Kiyoshi Araki ,  Taku Ito ,  Isao Okuda ,  Masahiro Oono ,  Moriyasu Kanai

    IPC分类号： G02B2714

    CPC分类号： G02B27/144 ,  G02B23/14

    摘要： A beam splitter for a digital camera splits light passed through a photographing lens into beams directed to a CCD and a finder optical system. The beam splitter includes at least one optical element provided with a beam splitting surface that is inclined with respect to an optical axis of the photographing lens, and a multi-layer film including a plurality of layers of dielectric materials is formed on the beam splitting surface. The multi-layer film is configured such that the beam splitting surface exhibits a substantially constant reflectivity at least for visible light that is incident on the beam splitting surface at any incident angle within a predetermined range.

    摘要翻译： 用于数字照相机的分束器将通过拍摄镜头的光分解成指向CCD和取景器光学系统的光束。 分束器包括至少一个光学元件，其设置有相对于拍摄镜头的光轴倾斜的分束表面，并且在分束表面上形成包括多层电介质材料的多层膜 。 多层膜被配置为使得分束表面至少对于在预定范围内以任何入射角入射在分束表面上的可见光呈现基本恒定的反射率。

    Device for and method of reducing cross talk in optical disk device
    3.
    发明授权
    Device for and method of reducing cross talk in optical disk device 失效
    减少光盘装置串扰的装置和方法

    公开(公告)号：US5373437A

    公开(公告)日：1994-12-13

    申请号：US740726

    申请日：1991-08-06

    申请人： Tsuyoshi Itoh ,  Isao Okuda ,  Hiroshi Nishikawa ,  Toshiyuki Kase ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

    发明人： Tsuyoshi Itoh ,  Isao Okuda ,  Hiroshi Nishikawa ,  Toshiyuki Kase ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

    IPC分类号： G02B7/28 ,  G11B7/09 ,  G11B7/095 ,  G11B7/00

    CPC分类号： G11B7/0909

    摘要： A device in which an offset is added to a focusing error signal to control an objective lens and thereby reduce the generation of cross-talk when a beam spot that is converged on an optical disk crosses over a wall of a groove of a track of the disk. By adding the offset to the focusing error signal, the objective lens is moved out of focus with the disk. Thus, the shape of a beam spot formed on a photo sensor is changed from a circle to an ellipse. A condenser lens provided for forming the beam spot is moved along the optical axis thereof in such a manner that an output of a recorded signal of the disk is at a maximum value. As a result, the objective lens is brought into focus on the disk. Thereafter, the objective lens is focused on the disk in accordance with the focusing error signal to which the offset is added, while maintaining the beam spot in the shape of an ellipse.

    摘要翻译： 一种装置，其中偏移量被加到聚焦误差信号上以控制物镜，从而当会聚在光盘上的束斑横跨在光盘的轨道的凹槽的壁上时减少串扰的产生 磁盘。 通过将偏移量加到聚焦误差信号上，物镜与光盘移出对焦。 因此，形成在光传感器上的光斑的形状从圆形变为椭圆形。 设置用于形成束斑的聚光透镜沿其光轴移动，使得盘的记录信号的输出处于最大值。 结果，将物镜聚焦在盘上。 此后，根据添加有偏移量的聚焦误差信号将物镜聚焦在光盘上，同时将光束点保持为椭圆形状。

    Optical disc apparatus having five light receiving areas for detecting focus error and tracking error
    6.
    发明授权
    Optical disc apparatus having five light receiving areas for detecting focus error and tracking error 失效
    具有用于检测聚焦误差和跟踪误差的五个光接收区域的光盘装置

    公开(公告)号：US5278401A

    公开(公告)日：1994-01-11

    申请号：US928408

    申请日：1992-08-12

    申请人： Suguru Takishima ,  Isao Okuda ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

    发明人： Suguru Takishima ,  Isao Okuda ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

    IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B11/105 ,  G01J1/20 ,  G11B7/00

    CPC分类号： G11B11/10597 ,  G11B11/10576 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/0943 ,  G11B7/131

    摘要： A signal detecting apparatus in an optical disc apparatus having an objective lens which converges light emitted from a light source onto an optical disc and a condenser lens which converges light reflected by the optical disc and transmitted through the objective lens includes first and second light receiving elements, each having a light receiving surface located before or behind a convergence point on which the light reflected from the optical disc is converged when the objective lens is in a focal position. Each of the light receiving surfaces are split into at least four light receiving areas. The signal detecting apparatus also includes a means for calculating a sum of differences of outputs of the light receiving surfaces' inner light receiving areas, calculating a sum of differences of outputs of the light receiving surfaces' outer light receiving areas, and then calculating a difference of the sums of differences, so that a track error signal is output in accordance with the difference of sums of differences calculated by the calculating means.

    摘要翻译： 在具有将从光源发射的光会聚到光盘上的物镜的光盘装置中的信号检测装置和会聚由光盘反射并透过物镜的光的聚光透镜包括第一和第二光接收元件 每个具有位于会聚点之前或之后的光接收表面，当物镜处于焦点位置时，从该光盘反射的光会聚在其上。 每个光接收表面被分成至少四个光接收区域。 信号检测装置还包括：计算受光面的内部光接收区域的输出的差的和的方式，计算受光面的外部光接收区域的输出的差的和，然后计算差 的差值之和，使得根据由计算装置计算的差值之差来输出轨道误差信号。

    Optical system for optical disc apparatus including anamorphic prisms
    7.
    发明授权
    Optical system for optical disc apparatus including anamorphic prisms 失效
    包括变形棱镜的光盘装置的光学系统

    公开(公告)号：US5477386A

    公开(公告)日：1995-12-19

    申请号：US917324

    申请日：1992-07-23

    申请人： Isao Okuda ,  Suguru Takishima ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

    发明人： Isao Okuda ,  Suguru Takishima ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

    IPC分类号： G02B5/04 ,  G11B7/135 ,  G02B7/18 ,  G02B13/10 ,  G02B27/10 ,  G11B7/12

    CPC分类号： G11B7/1359 ,  G02B5/04

    摘要： An optical system of an optical disc apparatus is disclosed for converging and projecting a bundle of rays emitted from a light source onto an optical disc. The optical system includes a collimating lens which collimates the bundle of rays emitted from the light source, two anamorphic prisms for shaping the cross section of the collimated bundle of rays transmitted through the collimating lens, and an objective lens which converges the bundle of rays shaped by the anamorphic prisms onto the optical disc. At least one of the anamorphic prisms is detachably mounted to an immovable body portion of the optical system.

    摘要翻译： 公开了一种光盘装置的光学系统，用于会聚和投射从光源发射的光束到光盘上。 光学系统包括准直透镜，其准直从光源发射的光束，两个变形棱镜，用于对通过准直透镜透射的准直光束的横截面进行成形;以及物镜，会聚成束状的光束 通过变形棱镜到光盘上。 至少一个变形棱镜可拆卸地安装到光学系统的不动部分。

    Structure of a zoom lens barrel
    9.
    发明授权
    Structure of a zoom lens barrel 失效
    变焦镜筒的结构

    公开(公告)号：US06819502B2

    公开(公告)日：2004-11-16

    申请号：US10771419

    申请日：2004-02-05

    申请人： Hiroshi Nomura ,  Yoshihiro Yamazaki ,  Isao Okuda

    发明人： Hiroshi Nomura ,  Yoshihiro Yamazaki ,  Isao Okuda

    IPC分类号： G02B1514

    CPC分类号： G02B7/102

    摘要： A zoom lens barrel includes a cam ring which is driven to rotate; a first lens frame which is positioned around the cam ring, supports a frontmost lens group of a zoom lens system, and includes a first cam follower; a light-shield exterior ring positioned around the first lens frame, and includes a second cam follower; and first and second outer cam grooves formed on an outer peripheral surface of the cam ring so that the first and second cam followers are engaged in the first and second outer cam grooves, respectively. The second cam follower is engaged in the second outer cam groove through a linear guide slot formed on the first lens frame. Zooming ranges of the first and second outer cam grooves are shaped so as to move the first lens frame and the light-shield exterior ring in the same moving path.

    摘要翻译： 变焦镜筒包括被驱动旋转的凸轮环; 围绕所述凸轮环定位的第一透镜框支撑变焦透镜系统的最前面的透镜组，并且包括第一凸轮从动件; 围绕所述第一透镜框架设置的遮光外壳，并且包括第二凸轮从动件; 以及形成在所述凸轮环的外周面上的第一和第二外凸轮槽，使得所述第一和第二凸轮从动件分别接合在所述第一和第二外凸轮槽中。 第二凸轮从动件通过形成在第一透镜框架上的线性引导槽接合在第二外凸轮槽中。 第一外凸轮槽和第二外凸轮槽的变焦范围被成形为使第一透镜框和遮光外环在相同的移动路径中移动。

    Optical system for optical information recording/reproducing apparatus
    10.
    发明授权
    Optical system for optical information recording/reproducing apparatus 失效
    用于光学信息记录/再现装置的光学系统

    公开(公告)号：US5617387A

    公开(公告)日：1997-04-01

    申请号：US782737

    申请日：1991-10-28

    申请人： Takashi Morita ,  Suguru Takishima ,  Isao Okuda

    发明人： Takashi Morita ,  Suguru Takishima ,  Isao Okuda

    IPC分类号： G11B7/08 ,  G02B26/08 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B7/22 ,  G11B11/105 ,  G11B7/00 ,  G02B5/30

    CPC分类号： G02B26/0875 ,  G11B7/094 ,  G11B7/1365 ,  G11B7/22 ,  G11B11/10543 ,  G11B7/0901 ,  G11B7/12

    摘要： In an optical system comprising a light source section consisting of a semiconductor laser and a collimator lens, an objective lens for focusing a light beam on an optical disk, a beam splitter for separating part of the light beam reflected from the optical disk, a condenser lens, and a photosensor for detecting the separated light beam to produce a focusing and a tracking error signal, a plane parallel plate is provided between the light source section and the beam splitter. By rotating the plane parallel plate with an adjusting mechanism, the light beam undergoes a parallel shift, so that the intensity distribution of light being incident on the objective lens is varied and a tracking offset due to a deviation of the optical axis of the output light from the light source section can be compensated for. The plane parallel plate may be disposed between the beam splitter and the condenser lens.

    摘要翻译： 在包括由半导体激光器和准直透镜构成的光源部分的光学系统中，用于将光束聚焦在光盘上的物镜，用于分离从光盘反射的光束的一部分的分束器，冷凝器 透镜和用于检测分离的光束以产生聚焦和跟踪误差信号的光电传感器，在光源部分和分束器之间设置平面平行板。 通过用调整机构旋转平面平行板，光束经受平行移动，使得入射到物镜上的光的强度分布变化，并且由于输出光的光轴偏离引起的跟踪偏移 从光源部分可以补偿。 平面平行板可以设置在分束器和聚光透镜之间。