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    Optical information recording/reproducing apparatus and optical information reproducing apparatus
    1.
    发明授权
    Optical information recording/reproducing apparatus and optical information reproducing apparatus 有权
    光信息记录/再现装置和光信息再现装置

    公开(公告)号：US08659982B2

    公开(公告)日：2014-02-25

    申请号：US12961571

    申请日：2010-12-07

    申请人： Hideharu Mikami ,  Harukazu Miyamoto

    发明人： Hideharu Mikami ,  Harukazu Miyamoto

    IPC分类号： G11B20/00 ,  G11B7/00 ,  G11B7/135 ,  G11B27/36

    CPC分类号： G11B7/083 ,  G03H2001/0441 ,  G03H2210/562 ,  G11B7/00781 ,  G11B2007/00656

    摘要： In a system of detecting an interference light with a light not irradiated onto an optical disc to increase the S/N ratio, it is difficult to stably acquire a reproduced signal with a simple configuration. Since the recording density is not improved, an improvement in transfer rate is difficult. In an optical information recording/reproducing apparatus where two optical beams face each other and are focused at the same place of a recording medium to record a standing wave developed by interference of the two optical beams, a phase difference of the two optical beams is modulated in a multiple stage and recorded. During reproduction, an interference light of a reproduced light from the recording medium and another reproduction reference light is detected as a reproduced signal, and a phase servo control stabilizing the phase of interference during reproduction by using a low frequency component of the reproduced signal is conducted.

    摘要翻译： 在利用未照射到光盘上的光来检测干涉光以提高S / N比的系统中，难以以简单的结构稳定地获取再生信号。 由于记录密度没有改善，传输速率的提高是困难的。 在其中两个光束彼此面对并聚焦在记录介质的相同位置以记录由两个光束的干涉产生的驻波的光信息记录/再现装置中，两个光束的相位差被调制 在多个阶段并记录下来。 在再现期间，检测来自记录介质的再现光的干涉光和另一个再现参考光作为再现信号，并且通过使用再现信号的低频分量来进行稳定再现期间的干扰相位的相位伺服控制 。

    Write power adjustment method and information recording method
    2.
    发明授权
    Write power adjustment method and information recording method 有权
    写功率调节方法和信息记录方法

    公开(公告)号：US08472293B2

    公开(公告)日：2013-06-25

    申请号：US13515654

    申请日：2010-03-02

    申请人： Soichiro Eto ,  Koichi Watanabe ,  Harukazu Miyamoto

    发明人： Soichiro Eto ,  Koichi Watanabe ,  Harukazu Miyamoto

    IPC分类号： G11B7/00

    CPC分类号： G11B7/0045 ,  G11B7/1267 ,  G11B7/24038 ,  G11B2007/0013

    摘要： In write power adjustment for an optical disc having a plurality of information storage layers, data of trial writing is varied by the influence of layers other than a target layer. It is difficult, therefore, to determine optimal write power. A modulation M[m] is obtained from a reproduction signal amplitude of a signal subjected to the trial writing performed with use of write powers Pw[m] (m being an integer) of a plurality of kinds. At least an optimum write power intercept Pint_opt is determined by fitting a relation between the Pw[m] and the M[m] by a modulation characteristic formula M=Masy×(1−(Pint−Pasy)/(Pw−Pasy)) having an asymptotic modulation Masy, a write power intercept Pint, and an asymptotic write power Pasy as parameters. Approximation accuracy by the fitting and/or quality of the trial writing signal are evaluated with use of at least the M[m], the modulation characteristic formula, and the Pint_opt. An optimum write power Pw_opt is calculated by performing a specified operation at least with use of the Pint_opt.

    摘要翻译： 在具有多个信息存储层的光盘的写入功率调整中，试写的数据由目标层以外的层的影响而变化。 因此，很难确定最佳写入功率。 通过使用多种写入功率Pw [m]（m为整数）进行试写的信号的再现信号振幅，获得调制M [m]。 通过用调制特性公式M = Masy×（1-（Pint-Pasy）/（Pw-Pasy））拟合Pw [m]和M [m]之间的关系来确定至少最佳写功率截止Pint_opt 具有渐近调制Masy，写功率截取Pint，渐近写功率Pasy作为参数。 通过使用至少M [m]，调制特性公式和Pint_opt来评估试写信号的拟合和/或质量的近似精度。 至少通过使用Pint_opt执行指定的操作来计算最佳写入功率Pw_opt。

    Optical head and optical disk apparatus
    5.
    发明授权
    Optical head and optical disk apparatus 有权
    光头和光盘装置

    公开(公告)号：US08098548B2

    公开(公告)日：2012-01-17

    申请号：US12419421

    申请日：2009-04-07

    申请人： Hideharu Mikami ,  Harukazu Miyamoto ,  Takahiro Kurokawa

    发明人： Hideharu Mikami ,  Harukazu Miyamoto ,  Takahiro Kurokawa

    IPC分类号： G11B7/00

    CPC分类号： G11B7/005 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1359 ,  G11B7/1367 ,  G11B7/1378 ,  G11B2007/0013

    摘要： An interference type optical head and an optical disk apparatus which have a signal amplification effect and can be manufactured in sizes comparable to conventional optical heads. In an optical disk apparatus that performs signal amplification by making a light, which is used as a reference light without being irradiated on an optical disk and, interfere with reflected light from the optical disk, a corner cube prism that reflects the reference light is mounted on the same actuator as an objective lens. A movable portion adjusts the optical path length of the interfering light in accordance with the kind of optical disk being read and the recording layer being read. A wedge prism may be used for the movable portion, and a spherical aberration correction lens and an optical path length adjusting component may be moved integrally.

    摘要翻译： 具有信号放大效应的干涉型光头和光盘装置，其尺寸可与常规光头相当。 在通过制造光而进行信号放大的光盘装置中，其被用作基准光而不被照射在光盘上并且干涉来自光盘的反射光，安装反射参考光的角立方棱镜 在与物镜相同的致动器上。 可移动部分根据正在读取的光盘的种类和读取的记录层来调节干涉光的光路长度。 楔形棱镜可以用于可动部分，并且球面像差校正透镜和光程长度调节部件可以一体地移动。

    MULTILAYER OPTICAL DISC
    7.
    发明申请
    MULTILAYER OPTICAL DISC 有权
    多层光盘

    公开(公告)号：US20110299374A1

    公开(公告)日：2011-12-08

    申请号：US13207146

    申请日：2011-08-10

    申请人： Yoshinori ISHIKAWA ,  Harukazu MIYAMOTO ,  Akemi HIROTSUNE

    发明人： Yoshinori ISHIKAWA ,  Harukazu MIYAMOTO ,  Akemi HIROTSUNE

    IPC分类号： G11B7/24 ,  G11B7/135

    CPC分类号： G11B7/08511 ,  G11B7/00736 ,  G11B7/24038

    摘要： A multilayer optical disc which has three or more recording layers and enables easy positioning of a focused beam spot onto a particular recording layer in which a BCA is disposed. An inter-layer distance between a particular recording layer and a recording layer adjacent to the particular recording layer is larger than the other inter-layer distances in which, at the focused beam spot positioning, the focused beam spot traverses the said adjacent recording layer earlier than the other recording layer adjacent to the particular recording layer.

    摘要翻译： 具有三个或更多个记录层的多层光盘，并且能够容易地将聚焦束斑定位在其中设置有BCA的特定记录层上。 特定记录层与与特定记录层相邻的记录层之间的层间距离大于其他层间距离，其中在聚焦光束点定位时，聚焦光束点较早地穿过所述相邻记录层 比与特定记录层相邻的另一个记录层。

    Optical head and optical disk device
    8.
    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。

    MULTILAYERED OPTICAL DISC AND ITS RECORDING METHOD
    9.
    发明申请
    MULTILAYERED OPTICAL DISC AND ITS RECORDING METHOD 审中-公开
    多层光盘及其记录方法

    公开(公告)号：US20100329097A1

    公开(公告)日：2010-12-30

    申请号：US12569151

    申请日：2009-09-29

    申请人： Harukazu Miyamoto ,  Takahiro Kurokawa

    发明人： Harukazu Miyamoto ,  Takahiro Kurokawa

    IPC分类号： G11B7/00 ,  B32B3/02

    CPC分类号： G11B7/00736 ,  G11B7/24038

    摘要： Information about a variation ratio of the recording power sensitivity, which varies depending on whether another recording layer is recorded or unrecorded, is recorded onto a disc control information area (DI) in advance. Moreover, based on this recording-power-sensitivity variation information, recording-power compensation is performed. The corresponding recording-power compensation method is classified into three types: (1) type in which the recording is performed by judging the recorded/unrecorded states of another layer, (2) type in which, instead of judging the recorded/unrecorded states of another layer, the recording is performed using an intermediate power of the optimum powers for both of the recorded/unrecorded states, and (3) combination of (1) and (2).

    摘要翻译： 关于记录功率灵敏度的变化率的信息，其根据是否记录或未记录另一个记录层而变化，被预先记录在盘控制信息区域（DI）上。 此外，基于该记录功率敏感度变化信息，执行记录功率补偿。 相应的记录功率补偿方法分为三种类型：（1）通过判断另一层的记录/未记录状态来执行记录的类型，（2）类型，而不是判断记录/未记录的状态 使用对于记录/未记录状态的最佳功率的中间功率来执行记录，以及（3）（1）和（2）的组合。