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    OPTICAL DISC APPARATUS THEREFOR
    1.
    发明申请
    OPTICAL DISC APPARATUS THEREFOR 有权
    其光盘设备

    公开(公告)号：US20090303847A1

    公开(公告)日：2009-12-10

    申请号：US12473752

    申请日：2009-05-28

    申请人： Yoshinori Ishikawa ,  Takeshi Shimano ,  Akio Fukushima

    发明人： Yoshinori Ishikawa ,  Takeshi Shimano ,  Akio Fukushima

    IPC分类号： G11B7/00

    CPC分类号： G11B7/13925 ,  G11B7/08511 ,  G11B7/0945 ,  G11B7/24038 ,  G11B2007/0013

    摘要： There is a need to accurately lock focus of a laser beam onto a target data layer of a multilayer optical disc. The above need can be addressed by, for example, performing a focus lock operation after a spherical aberration correction amount is set in such a way as to make smaller the ratio of the focus error signal waveform amplitude at the data layer adjacent to a target data layer through which a laser beam passes earlier than through the target data layer to the focus error signal waveform amplitude at the target data layer than that when the spherical aberration correction amount is set so as to be optimal for the target data layer.

    摘要翻译： 需要将激光束的焦点准确地锁定到多层光盘的目标数据层上。 可以通过例如在设置球面像差校正量之后进行聚焦锁定操作来解决上述需要，以便使得与目标数据相邻的数据层处的聚焦误差信号波形幅度的比例变小 激光束比通过目标数据层更早地传递到目标数据层的聚焦误差信号波形振幅的层，而不是对于目标数据层设置为最佳的球面像差校正量。

    Optical disc apparatus therefor
    2.
    发明授权
    Optical disc apparatus therefor 有权
    光盘装置

    公开(公告)号：US08179752B2

    公开(公告)日：2012-05-15

    申请号：US12473752

    申请日：2009-05-28

    申请人： Yoshinori Ishikawa ,  Takeshi Shimano ,  Akio Fukushima

    发明人： Yoshinori Ishikawa ,  Takeshi Shimano ,  Akio Fukushima

    IPC分类号： G11B7/00

    CPC分类号： G11B7/13925 ,  G11B7/08511 ,  G11B7/0945 ,  G11B7/24038 ,  G11B2007/0013

    摘要： There is a need to accurately lock focus of a laser beam onto a target data layer of a multilayer optical disc. The above need can be addressed by, for example, performing a focus lock operation after a spherical aberration correction amount is set in such a way as to make smaller the ratio of the focus error signal waveform amplitude at the data layer adjacent to a target data layer through which a laser beam passes earlier than through the target data layer to the focus error signal waveform amplitude at the target data layer than that when the spherical aberration correction amount is set so as to be optimal for the target data layer.

    摘要翻译： 需要将激光束的焦点准确地锁定到多层光盘的目标数据层上。 可以通过例如在设置球面像差校正量之后进行聚焦锁定操作来解决上述需要，以便使得与目标数据相邻的数据层处的聚焦误差信号波形幅度的比例变小 激光束比通过目标数据层更早地传递到目标数据层的聚焦误差信号波形振幅的层，而不是对于目标数据层设置为最佳的球面像差校正量。

    Optical information recording medium, optical information recording/reproducing device and optical information recording/reproducing method
    3.
    发明授权
    Optical information recording medium, optical information recording/reproducing device and optical information recording/reproducing method 有权
    光信息记录介质，光信息记录/再现装置和光信息记录/再现方法

    公开(公告)号：US08699310B2

    公开(公告)日：2014-04-15

    申请号：US12680612

    申请日：2008-08-06

    申请人： Kenichi Shimada ,  Tatsuro Ide ,  Takeshi Shimano ,  Harukazu Miyamoto

    发明人： Kenichi Shimada ,  Tatsuro Ide ,  Takeshi Shimano ,  Harukazu Miyamoto

    IPC分类号： G11B7/0065

    CPC分类号： G03H1/02 ,  G03H1/0256 ,  G03H1/22 ,  G03H2222/56 ,  G03H2223/19 ,  G03H2223/24 ,  G03H2250/33 ,  G03H2250/42 ,  G11B7/0065 ,  G11B7/24044

    摘要： A holographic recording medium in which information can be reproduced by phase conjugate beam without requiring a mirror for obtaining the phase conjugate beam and its driving part and recording density is not reduced. The recording medium includes a recording layer in which an interference pattern is recorded and a light absorption/transmission layer which can be reversibly changed to be in a first state where signal beam and reference beam passed through the recording layer are absorbed at the time of recording of information and a second state where the reference beam is transmitted at the time of reproduction of information, and the reference beam transmitted through the light absorption/transmission layer is reflected by a reflection layer to produce the phase conjugate beam.

    摘要翻译： 可以通过相位共轭光再现信息的全息记录介质，而不需要用于获得相位共轭光束的反射镜及其驱动部分和记录密度。 记录介质包括其中记录有干涉图案的记录层和可以可逆地改变为在记录时吸收信号束和参考光束通过记录层的第一状态的光吸收/透射层 的信息和在再现信息时发送参考光束的第二状态，并且通过光吸收/透射层透射的参考光束被反射层反射以产生相位共轭光束。

    Optical disk apparatus
    7.
    发明申请
    Optical disk apparatus 失效
    光盘装置

    公开(公告)号：US20070183274A1

    公开(公告)日：2007-08-09

    申请号：US11363956

    申请日：2006-03-01

    申请人： Hiromi Kudo ,  Takahiro Kurokawa ,  Takeshi Shimano ,  Harukazu Miyamoto

    发明人： Hiromi Kudo ,  Takahiro Kurokawa ,  Takeshi Shimano ,  Harukazu Miyamoto

    IPC分类号： G11B7/00

    CPC分类号： G11B7/0943 ,  G11B7/1369

    摘要： An optical disk apparatus for correcting astigmatism that influences the read/ write. If there is astigmatism, and auto-focus and tracking control are in operation, then a push-pull signal amplitude and a 2T signal amplitude vary with the variation of an amount of spherical aberration, resulting in two cases. In one case, the amount of spherical aberration to give the maximum value of push-pull signal amplitude agrees with the amount of spherical aberration to give the maximum value of 2T signal amplitude, and in the other case the two amounts do not agree. If there is no astigmatism, two amounts agree each other. If there in no agreement, then correction is made by using an astigmatism correcting element until the agreement is reached between the two. In the case where two amounts agree, specification is made for the existence and angle of astigmatism, and correction is made by using focus error signals from adjacent tracks.

    摘要翻译： 一种用于校正影响读/写的散光的光盘装置。 如果存在散光，并且自动对焦和跟踪控制正在运行，则推挽信号幅度和2T信号幅度随球面像差量的变化而变化，导致两种情况。 在一种情况下，给出推挽信号幅度的最大值的球面像差的量与给出2T信号幅度的最大值的球面像差量一致，而在另一种情况下，两种量不一致。 如果没有散光，两个数量彼此相符。 如果没有达成协议，则在使用散光矫正元件之前进行校正，直到两者达成一致。 在两个数量一致的情况下，对散光的存在和角度进行规定，并且通过使用来自相邻轨道的聚焦误差信号进行校正。

    Optical disc drive apparatus, information reproducing or recording method
    8.
    发明授权
    Optical disc drive apparatus, information reproducing or recording method 失效
    光盘驱动装置，信息再现或记录方法

    公开(公告)号：US07251203B2

    公开(公告)日：2007-07-31

    申请号：US10914194

    申请日：2004-08-10

    申请人： Takeshi Shimano ,  Tatsuro Ide

    发明人： Takeshi Shimano ,  Tatsuro Ide

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1353 ,  G11B7/13927

    摘要： Disclosed here is a method for solving a conventional problem that no spherical aberration signal can be detected from any push-pull signal that is easy to adjust an object photodetector when a differential push-pull signal is obtained. To achieve the above object, sub-beams used to detect a differential push-pull signal are defocused from the main beam and spherical aberration signals are detected and the compensation of the spherical aberration is started while tracking controlling is off and detection of spherical aberration signals is held while the tracking controlling is on. The present invention can thus obtain both of the spherical aberration signal and the differential push-pull signal at the same time with use of the conventional detection system.

    摘要翻译： 这里公开了一种解决传统问题的方法，即当获得差分推挽信号时，任何容易调整物体光电检测器的推挽信号都不能检测到球面像差信号。 为了实现上述目的，用于检测差分推挽信号的子光束与主光束散焦，并且检测球面像差信号，并且在跟踪控制关闭并且检测球面像差信号时开始球面像差的补偿 在跟踪控制开启时保持。 因此，本发明可以使用传统的检测系统同时获得球面像差信号和差分推挽信号两者。