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111 条记录 (耗时 0.034 秒)

    Optical disc drive
    21.
    发明授权
    Optical disc drive 有权
    光盘驱动器

    公开(公告)号：US06477129B2

    公开(公告)日：2002-11-05

    申请号：US09794913

    申请日：2001-02-28

    申请人： Koichi Maruyama ,  Takeshi Shimano ,  Shigeru Nakamura ,  Akira Arimoto ,  Kazuo Shigematsu

    发明人： Koichi Maruyama ,  Takeshi Shimano ,  Shigeru Nakamura ,  Akira Arimoto ,  Kazuo Shigematsu

    IPC分类号： G11B700

    CPC分类号： G11B7/1374 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0916 ,  G11B7/12 ,  G11B7/123 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/139 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： An optical disc drive using either one of a first disc (e.g., DVD) and a second disc (e.g., CD), is provided with a first laser diode that emits a shorter wavelength beam, a second laser diode that emits a longer wavelength beam, an objective lens, and a driving unit that holds and rotates the optical disc. The optical axis of the objective lens is inclined relative to a normal to the optical disc. The first laser diode is located at a first position so that the coma, which is caused when the first laser beam is converged on a data recording surface of the first disc, is minimized, and the second laser diode is located at a second position so that the coma, which is caused when the second laser beam is converged on a data recording surface of the second disc, is minimized.

    摘要翻译： 使用第一盘（例如DVD）和第二盘（例如CD）中的任一个的光盘驱动器设置有发射较短波长束的第一激光二极管，发射较长波长束的第二激光二极管 ，物镜，以及保持和旋转光盘的驱动单元。 物镜的光轴相对于光盘的法线倾斜。 第一激光二极管位于第一位置，使得当第一激光束会聚在第一盘的数据记录表面上时引起的彗差被最小化，并且第二激光二极管位于第二位置 当第二激光束会聚在第二盘的数据记录表面上时引起的彗差被最小化。

    Tracking method for optical disk apparatus using diffraction light
    22.
    发明授权
    Tracking method for optical disk apparatus using diffraction light 失效
    使用衍射光的光盘装置的跟踪方法

    公开(公告)号：US5930220A

    公开(公告)日：1999-07-27

    申请号：US770075

    申请日：1996-12-19

    申请人： Takeshi Shimano ,  Akira Arimoto ,  Takeshi Nakao ,  Masayuki Inoue ,  Kunikazu Ohnishi ,  Yoshio Suzuki

    发明人： Takeshi Shimano ,  Akira Arimoto ,  Takeshi Nakao ,  Masayuki Inoue ,  Kunikazu Ohnishi ,  Yoshio Suzuki

    IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

    CPC分类号： G11B7/1353 ,  G11B7/094 ,  G11B7/131 ,  G11B2007/0006 ,  G11B7/0901 ,  G11B7/0909

    摘要： In an optical head, light from a semiconductor laser is directed through a condensing optical system with a condensing lens onto an optical information recording medium through a transparent substrate in the form of a light spot. A unit for producing a light spot position control signal and a unit able to move the light spot, which supports the objective lens for movement, position the light spot on an information track. Light reflected from the optical information recording medium is directed through a polarized light branching element to a photo detector. Also mounted for movement with the objective lens are a polarization conversion element, arranged between the optical information recording medium and the polarized light branching element in order to change the polarization state of light incident to the optical information recording medium and reflected therefrom and a polarization diffraction grating, the diffraction efficiency of which changes depending on the change in the polarization state of the incident light and the reflected light caused by the polarization conversion element. The light spot control signal is detected from both reflected light diffracted through the polarization diffraction grating and non-diffracted reflected light contained in the light which passes through the polarized light branching element.

    摘要翻译： 在光头中，来自半导体激光器的光通过具有聚光透镜的聚光系统通过光点形式的透明基板引导到光信息记录介质上。 用于产生光点位置控制信号的单元和能够移动支持物镜移动的光点的单元将光斑定位在信息轨道上。 从光信息记录介质反射的光通过偏振光分支元件被引导到光检测器。 为了使入射到光信息记录介质的光的偏振状态改变并反射，偏振转换元件也安装在光学信息记录介质和偏振光分支元件之间，并且偏振衍射元件 光栅，其衍射效率根据入射光的偏振态和由偏振转换元件引起的反射光的变化而变化。 从通过偏振衍射光栅衍射的反射光和通过偏振光分支元件的光中包含的非衍射反射光检测光点控制信号。

    Optical information recording apparatus
    27.
    发明授权
    Optical information recording apparatus 有权
    光信息记录装置

    公开(公告)号：US08072850B2

    公开(公告)日：2011-12-06

    申请号：US12355715

    申请日：2009-01-16

    申请人： Fumio Isshiki ,  Kunikazu Ohnishi ,  Nobuyuki Maeda ,  Takahiro Kurokawa ,  Takeshi Shimano

    发明人： Fumio Isshiki ,  Kunikazu Ohnishi ,  Nobuyuki Maeda ,  Takahiro Kurokawa ,  Takeshi Shimano

    IPC分类号： G11B7/00

    CPC分类号： G11B7/13925 ,  G11B7/0033 ,  G11B7/0917 ,  G11B7/0945 ,  G11B2007/0013

    摘要： A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and the residual aberration in the optical system. The spherical aberration and defocus are coarsely adjusted using the amplitude (PP amplitude) of the tracking error signal and then finely adjusted using the amplitude (RF amplitude) of the readout signal. Since the spherical aberration can properly be adjusted, it is possible to raise the reliability of the readout signal.

    摘要翻译： 不管读出信号检测器的位置误差和光学系统中的残余像差如何，允许可重写光盘装置，光学信息记录和再现装置等将光学系统自动且适当地调整到最佳焦点状态。 使用跟踪误差信号的振幅（PP振幅）粗略调整球面像差和散焦，然后使用读出信号的振幅（RF幅度）进行微调。 由于可以适当地调节球面像差，所以可以提高读出信号的可靠性。

    Optical head and optical disk device
    28.
    发明授权
    Optical head and optical disk device 有权
    光头和光盘装置

    公开(公告)号：US08023390B2

    公开(公告)日：2011-09-20

    申请号：US12025797

    申请日：2008-02-05

    申请人： Takeshi Shimano ,  Harukazu Miyamoto ,  Hideharu Mikami ,  Jiro Hashizume

    发明人： Takeshi Shimano ,  Harukazu Miyamoto ,  Hideharu Mikami ,  Jiro Hashizume

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1378 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1359

    摘要： An interference type optical head and an optical disk device that can easily adjust an optical path length difference of a couple of lights, ensure higher signal amplification effect, and are suitable for reduction in size are provided in order to improve a regeneration signal quality with amplification of signal in the case where reflectivity of each layer must be lowered and relative noise for the signal increases because read speed is high in a multilayer optical disk. In view of essentially improving an S/N ratio of the regeneration signal in high-speed rotation of a multilayer disk, a plurality of interference phases are generated and an optical system for differential calculation has been reduced in size with an angular selective polarization conversion element in the optical disk device for amplifying the signal with interference of the light not radiated to the disk with the reflected light from the disk. Moreover, adjustment of reflection mirror angle of the reference light is no longer required by using a corner cube prism as the reference light reflection mirror and highly accurate signal detection can also be realized with a simplified structure.

    摘要翻译： 可以容易地调整两个光的光程长度差的干涉型光头和光盘装置，确保更高的信号放大效果，并且适合于减小尺寸，以便通过放大来提高再生信号质量 在多层光盘中的读取速度高的情况下，必须降低每一层的反射率和信号的相对噪声的信号。 鉴于在多层盘的高速旋转中基本上提高再生信号的S / N比，产生多个干涉相位，并且用角度选择偏振转换元件的差分计算用光学系统的尺寸减小了 在光盘装置中，用于将没有辐射到盘的光的信号与来自盘的反射光放大的信号。 此外，通过使用角隅棱镜作为参考光反射镜，不再需要对参考光的反射镜角度的调整，并且也可以以简化的结构实现高精度的信号检测。

    GRATING ELEMENT, OPTICAL PICKUP OPTICAL SYSTEM AND METHOD OF DESIGNING GRATING ELEMENT
    29.
    发明申请
    GRATING ELEMENT, OPTICAL PICKUP OPTICAL SYSTEM AND METHOD OF DESIGNING GRATING ELEMENT 审中-公开
    光学元件，光学拾取光学系统和设计元件的方法

    公开(公告)号：US20110085432A1

    公开(公告)日：2011-04-14

    申请号：US12995761

    申请日：2009-10-29

    申请人： Mitsuhiro Miyauchi ,  Takako Shiba ,  Takeshi Shimano

    发明人： Mitsuhiro Miyauchi ,  Takako Shiba ,  Takeshi Shimano

    IPC分类号： G11B7/135 ,  G02B5/18 ,  B32B37/02

    CPC分类号： G11B7/1275 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0006 ,  Y10T156/10

    摘要： A grating element is provided with diffraction members wherein protrusions and recesses are periodically arranged, respectively, on one surface of each of transparent substrates. The diffraction members are laminated in the substantially perpendicular direction to the transparent substrates, the protrusions of the diffraction members are made of a dielectric multilayer film, and the dielectric multilayer film has dielectric films of two or more types laminated in the substantially perpendicular direction on the transparent substrates. The wavelengths of laser beams diffracted at predetermined diffraction efficiencies by the diffraction members are different from one another.

    摘要翻译： 光栅元件设置有衍射构件，其中突出部和凹部分别周期地布置在每个透明基板的一个表面上。 衍射构件在与透明基板大致垂直的方向上层叠，衍射构件的突起由电介质多层膜制成，并且电介质多层膜具有在基本垂直的方向上层叠的两种或更多种类型的电介质膜 透明基板。 由衍射构件以预定的衍射效率衍射的激光束的波长彼此不同。