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    POWER ADJUSTING METHOD, INFORMATION RECORDING METHOD AND INFORMATION RECORDING MEDIUM
    2.
    发明公开
    POWER ADJUSTING METHOD, INFORMATION RECORDING METHOD AND INFORMATION RECORDING MEDIUM 审中-公开
    KRAFTEINSTELLUNGSVERFAHREN，INFORMATIONSAUFZEICHNUNGSVERFAHREN UND INFORMATIONSAUFZEICHNUNGSMEDIUM

    公开(公告)号：EP2450888A1

    公开(公告)日：2012-05-09

    申请号：EP10793879.7

    申请日：2010-03-02

    Applicant: Hitachi Consumer Electronics Co. Ltd.

    Inventor： ETO, Soichiro ,  WATANABE, Koichi ,  MIYAMOTO, Harukazu

    IPC: G11B7/0045 ,  G11B7/125

    CPC classification number: G11B7/1267

    Abstract: A write power adjustment method makes it possible to set optimum write power with high precision. Trial writing is conducted by using write power Pw,m (where m is an integer) of a plurality of kinds, and a modulation M,m associated with each write power is calculated. Optimum asymptotic power Pasy-opt is calculated by performing predetermined computation by using reference asymptotic power Pasy-ref and reference write start power Pws-ref which are previously determined for each medium. An evaluated value S,m = M,m × (Pw,m - Pasy-opt) is calculated by using the optimum asymptotic power Pasy-opt. Write power Pw that makes the evaluated value S equal to zero when applying straight line approximation to a relation between the write power Pw,m and the evaluated value S,m is calculated as optimum write start power Pws-opt. And optimum write power Pw-opt is found by performing predetermined computation on the optimum write start power Pws-opt.

    Abstract translation: 写入功率调整方法能够以高精度设置最佳写入功率。 通过使用多种写入功率Pw，m（其中m是整数）进行试写，并且计算与每个写入功率相关联的调制M，m。 通过使用对于每个介质预先确定的参考渐近功率Pasy-ref和参考写入启动功率Pws-ref执行预定的计算来计算最佳渐近功率Pasy-opt。 通过使用最佳渐近幂Pasy-opt计算评估值S，m = M，m×（Pw，m-Pasy-opt）。 当将写入功率Pw，m与评估值S之间的关系应用直线近似时，将评估值S等于0的写入功率Pw计算为最佳写入开始功率Pws-opt。 通过对最佳写入启动功率Pws-opt执行预定的计算，找到最佳写入功率Pw-opt。

    OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING METHOD
    3.
    发明公开
    OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING METHOD 审中-公开
    光信息记录媒体，光学信息记录 - / - 重放设备和光学信息记录 - / - 回放

    公开(公告)号：EP2207068A1

    公开(公告)日：2010-07-14

    申请号：EP08792252.2

    申请日：2008-08-06

    Applicant: Hitachi Consumer Electronics Co., Ltd.

    Inventor： SHIMADA, Kenichi ,  IDE, Tatsuro ,  SHIMANO, Takeshi ,  MIYAMOTO, Harukazu

    IPC: G03H1/26 ,  G03H1/02

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

    Abstract: 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.

    Abstract translation: 在其中的信息的全息记录介质可以通过相位共轭光，而不需要用于得到相位共轭光束和它的驱动部分和记录密度不会降低的反射镜被再现。 所述记录介质包括在其中干涉图案的记录层记录和能够发生可逆变化的光吸收/透过层是在通过记录层传递的信号光束和参考光束在记录时吸收的第一状态 的信息，并且其中所述参考光束是在信息再现时的反式mitted的第二状态，和参考光束反式通过所述光吸收/透过层mitted由反射层，以产生相位共轭光反射。

    WRITE POWER ADJUSTMENT METHOD AND INFORMATION RECORDING METHOD
    4.
    发明公开
    WRITE POWER ADJUSTMENT METHOD AND INFORMATION RECORDING METHOD 审中-公开
    信息安全管理系统

    公开(公告)号：EP2515301A1

    公开(公告)日：2012-10-24

    申请号：EP10837308.5

    申请日：2010-03-02

    Applicant: Hitachi Consumer Electronics Co. Ltd.

    Inventor： ETO Soichiro ,  WATANABE, Koichi ,  MIYAMOTO, Harukazu

    IPC: G11B7/0045 ,  G11B7/125

    CPC classification number: G11B7/0045 ,  G11B7/1267 ,  G11B7/24038 ,  G11B2007/0013

    Abstract: 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 x (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.

    Abstract translation: 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]。 通过将调制特性公式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入功率截取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。

    MULTILAYER OPTICAL DISC
    5.
    发明授权
    MULTILAYER OPTICAL DISC 有权
    多层光盘

    公开(公告)号：EP2154683B1

    公开(公告)日：2012-06-20

    申请号：EP08721721.2

    申请日：2008-03-10

    Applicant: Hitachi Consumer Electronics Co. Ltd.

    Inventor： ISHIKAWA, Yoshinori ,  MIYAMOTO, Harukazu ,  HIROTSUNE, Akemi

    IPC: G11B7/24 ,  G11B7/085

    CPC classification number: G11B7/08511 ,  G11B7/00736 ,  G11B7/24038

    Abstract: A multilayer optical disc which has three or more recording layers and enables easy positioning of a beam spot on a desired recording layer wherein BCA is disposed. A distance between the desired recording layer and either of recording layers adjacent to the desired recording layer over which a laser spot passes earlier than the desired recording layer when positioning a beam spot on the desired recording layer is set larger than a distance between the desired recording layer and the other adjacent recording layer.

    RECORDABLE OPTICAL DISC, RECORDING DEVICE, AND RECORDING METHOD
    6.
    发明公开
    RECORDABLE OPTICAL DISC, RECORDING DEVICE, AND RECORDING METHOD 审中-公开
    AUFZEICHNUNGSFÄHIGEOPTISCHE PLATTE，AUFZEICHNUNGSVORRICHTUNG UND AUFZEICHNUNGSVERFAHREN

    公开(公告)号：EP2450890A1

    公开(公告)日：2012-05-09

    申请号：EP10794272.4

    申请日：2010-07-01

    Applicant: Sony Corporation ,  Panasonic Corporation ,  TDK Corporation ,  Hitachi Consumer Electronics Co. Ltd. ,  Samsung Electronics Co., Ltd.

    Inventor： AKIMOTO, Yoshihiro ,  KOBAYASHI, Shoei ,  ITO, Motoshi ,  HINO, Yasumori ,  INOUE, Hiroyasu ,  MIYAMOTO, Harukazu ,  NISHIMURA, Koichiro ,  HWANG, Sung-hee ,  HWANG, In-oh

    IPC: G11B7/007 ,  G11B7/0045 ,  G11B7/125

    CPC classification number: G11B7/00736 ,  G11B7/1267 ,  G11B7/24038

    Abstract: The present invention is to realize a proper inner zone layout in a quadruple-layer disk.
    A test area is provided in the inner zone (inner circumference side area) in each of recording layers. If two test areas closer to the outer circumference, of four test areas, are defined as a first pair and two test areas closer to the inner circumference are defined as a second pair, the test areas of the first pair and the test areas of the second pair are so disposed as to be prevented from overlapping with each other in the layer direction. Two test areas of the first pair have the same consumption direction of the test area, and are so disposed that the areas to be used next hardly overlap with each other in the layer direction. Two test areas of the second pair have the same consumption direction of the test area opposite to the consumption direction of the test area in the first pair, and are so disposed that the areas to be used next hardly overlap with each other in the layer direction.

    Abstract translation: 本发明是在四层盘中实现适当的内区布局。 在每个记录层中的内部区域（内周侧区域）设置测试区域。 如果两个测试区域靠近四个测试区域的外圆周被定义为第一对，并且靠近内圆周的两个测试区域被定义为第二对，则第一对测试区域和测试区域的测试区域 第二对被布置成防止在层方向上彼此重叠。 第一对的两个测试区域具有与测试区域相同的消耗方向，并且被设置为使得下一个区域在层方向上几乎不重叠。 第二对的两个测试区域具有与第一对中的测试区域的消耗方向相反的测试区域的相同消耗方向，并且被设置为使得下一个使用的区域在层方向上几乎不重叠 。

    MULTILAYER OPTICAL DISC
    8.
    发明公开
    MULTILAYER OPTICAL DISC 有权
    MEHRSCHICHTIGER OPTISCHERDATENTRÄGER

    公开(公告)号：EP2154683A1

    公开(公告)日：2010-02-17

    申请号：EP08721721.2

    申请日：2008-03-10

    Applicant: Hitachi Consumer Electronics Co. Ltd.

    Inventor： ISHIKAWA, Yoshinori ,  MIYAMOTO, Harukazu ,  HIROTSUNE, Akemi

    IPC: G11B7/24 ,  G11B7/085

    CPC classification number: G11B7/08511 ,  G11B7/00736 ,  G11B7/24038

    Abstract: 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.

    Abstract translation: 具有三个或更多个记录层的多层光盘，并且能够将聚焦光束点定位到设置有BCA的特定记录层上。 特定记录层和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。

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