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111 条记录 (耗时 0.049 秒)

    Optical information recording apparatus
    25.
    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
    26.
    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
    27.
    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。

    Optical disk apparatus
    29.
    发明授权
    Optical disk apparatus 有权
    光盘装置

    公开(公告)号：US07715287B2

    公开(公告)日：2010-05-11

    申请号：US11746681

    申请日：2007-05-10

    申请人： Takeshi Shimano ,  Harukazu Miyamoto

    发明人： Takeshi Shimano ,  Harukazu Miyamoto

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1362 ,  G11B7/1356 ,  G11B7/1365

    摘要： Provided is an optical disc apparatus including an interference-type optical disk signal detection system, which allows an optical path difference between two kinds of light to be controlled easily, which has a high signal amplification effect, and which is suitable for miniaturization of an optical system. An interference-type optical system is integrally formed to stabilize an optical path difference between signal light and reference light. At the same time, means for controlling an optical path length of the reference light is attached to a reference mirror, and thereby controls signal amplitude so as to be constantly set the maximum in response to a change in the optical path length with time due to a variation in the thickness of a cover layer of an optical disk, a temperature and the like. Moreover, the optical system is miniaturized by using a Twyman-Green type interference optical system.

    摘要翻译： 提供了一种包括干涉型光盘信号检测系统的光盘装置，其能够容易地控制两种光之间的光路差异，其具有高的信号放大效应，并且适合于光学的小型化 系统。 整体形成干涉型光学系统，以稳定信号光与参考光之间的光程差。 同时，用于控制参考光的光程长度的装置附加到参考反射镜，从而控制信号幅度，以便随着时间的流逝随时间的变化而恒定地设定最大值 光盘的覆盖层的厚度的变化，温度等。 此外，通过使用Twyman-Green型干涉光学系统，光学系统被小型化。

    Optical pickup apparatus
    30.
    发明授权
    Optical pickup apparatus 失效
    光拾取装置

    公开(公告)号：US07664005B2

    公开(公告)日：2010-02-16

    申请号：US11704953

    申请日：2007-02-12

    申请人： Shigeharu Kimura ,  Takeshi Shimano

    发明人： Shigeharu Kimura ,  Takeshi Shimano

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1378 ,  G11B7/0903 ,  G11B7/1362 ,  G11B2007/0013

    摘要： The adverse influence of reflected light from adjacent layers as stray light on a control signal or data signal is reduced when tracking a multilayered optical disc using differential push-pull method. The reflected light from the optical disc including stray light from an adjacent layer is once condensed with a condenser lens having little aberration and is then reflected by a reflecting mirror having a partial reflecting region. The resultant reflected light, which has the influence of stray light reduced, passes through a polarization beam splitter and becomes incident on a four-quadrant detector (for main beam) and a split detector (for sub beam) via a condenser lens having astigmatic aberration.

    摘要翻译： 当使用差分推挽方法跟踪多层光盘时，来自相邻层的反射光作为杂散光对控制信号或数据信号的不良影响降低。 来自包括来自相邻层的杂散光的来自光盘的反射光一旦与具有很小像差的聚光透镜一起聚焦，然后被具有部分反射区域的反射镜反射。 所产生的受杂散光影响的反射光通过偏振分束器并通过具有散光像差的聚光透镜入射到四象限检测器（用于主光束）和分割检测器（用于子光束） 。