公开(公告)号：US08724439B2

公开(公告)日：2014-05-13

申请号：US13260150

申请日：2010-04-23

申请人： Tomo Kishigami ,  Nobuo Takeshita

发明人： Tomo Kishigami ,  Nobuo Takeshita

IPC分类号： G11B7/00

CPC分类号： G11B7/1267 ,  G11B7/00456 ,  G11B7/0062 ,  G11B7/00736

摘要： In an optical recording method, recording parameters (WU) to be used for recording are obtained using recommended recording parameter values (WR) read from an optical recording medium and previously obtained vector information (PC) and approximation coefficients (Ca, Cb) (S24). Writing to the optical recording medium is performed using the obtained recording parameters (S17). The vector information (PC) includes a vector component of the parameters obtained statistically with respect to parameter difference values (DF) between optimal recording parameter values (WO) and the recommended recording parameter values (WR) over a plurality of optical recording media so as to strengthen mutual correlation between the parameters. The approximation coefficients (Ca, Cb) are obtained by approximating a relationship between converted information (X) and feature information (D), the converted information (X) indicating a relationship between the vector information (PC) and the parameter difference values (DF), the feature information (D) indicating the features of each optical recording medium obtained from the recommended recording parameter values (WR) and the vector information (PC).

摘要翻译： 在光学记录方法中，使用从光学记录介质读取的推荐记录参数值（WR）和先前获得的矢量信息（PC）和近似系数（Ca，Cb）（S24）获得用于记录的记录参数（WU） ）。 使用所获得的记录参数来执行对光记录介质的写入（S17）。 矢量信息（PC）包括相对于多个光记录介质上的最佳记录参数值（WO）和推荐记录参数值（WR）之间的参数差值（DF）统计得到的参数的矢量分量， 加强参数之间的相互关联。 近似系数（Ca，Cb）是通过近似转换信息（X）和特征信息（D）之间的关系得到的，表示矢量信息（PC）与参数差值（DF）之间的关系的转换信息（X） ），指示从推荐的记录参数值（WR）和矢量信息（PC）获得的每个光学记录介质的特征的特征信息（D）。

公开(公告)号：US08693295B2

公开(公告)日：2014-04-08

申请号：US12375138

申请日：2007-05-22

申请人： Kenya Nakai ,  Masahisa Shinoda ,  Nobuo Takeshita

发明人： Kenya Nakai ,  Masahisa Shinoda ,  Nobuo Takeshita

IPC分类号： G11B7/00

CPC分类号： G11B7/24 ,  G11B7/0901 ,  G11B7/0941 ,  G11B7/24085 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24314 ,  G11B2007/24316

摘要： When using an optical disc medium that includes pit trains having their widths narrower than a diffraction limit, it is difficult to detect a tracking error signal and take a tracking-servo control while increasing pit density in a direction orthogonal to a pit-train extension direction. Information pit trains are arranged spirally or concentrically and formed in a structure in which their depths are changed periodically at a pitch radially along the optical disc medium, so that the tracking error signal can be obtained by push-pull detection of diffraction light from the structure.

摘要翻译： 当使用包括其宽度窄于衍射极限的凹坑列的光盘介质时，难以检测跟踪误差信号并进行跟踪伺服控制，同时在垂直于凹坑列延伸方向的方向上增加凹坑密度 。 信息坑列被螺旋地或同心地布置并且形成在其深度沿着光盘介质沿径向周期性地改变的结构中，从而可以通过来自结构的衍射光的推挽检测来获得跟踪误差信号 。

公开(公告)号：US20130286810A1

公开(公告)日：2013-10-31

申请号：US13978160

申请日：2012-01-17

申请人： Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

发明人： Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC分类号： G11B7/1392

CPC分类号： G11B7/13927 ,  G11B7/1362 ,  G11B7/1376 ,  G11B2007/0013

摘要： An optical pickup device includes a laser light source 201, a collimating optical system 202 for converting laser light to parallel light, a focusing optical system 205 for focusing the parallel light onto an optical disc, a light detection unit for receiving returning light returning by reflection of the focused light from the optical disc 101 and outputting a detection signal, and a reflecting mirror 204 disposed between the collimating optical system and the focusing optical system. The reflecting mirror 204 has a reflective surface including three regions having different reflectances. The central region on the reflecting surface meets the other two regions, at positions illuminated by the light focused by the light focusing optical system, in boundary lines that are parallel to a radial direction on the optical disc 101. The reflectance of the central region is lower than the reflectances of the other two regions.

摘要翻译： 光拾取装置包括激光源201，用于将激光转换为平行光的准直光学系统202，用于将平行光聚焦到光盘上的聚焦光学系统205，用于接收通过反射返回的返回光的光检测单元 来自光盘101的聚焦光并输出检测信号，反射镜204设置在准直光学系统和聚焦光学系统之间。 反射镜204具有包括具有不同反射率的三个区域的反射表面。 反射表面上的中心区域与由光聚焦光学系统聚焦的光照射的位置处在与光盘101上的径向平行的边界线处的另外两个区域相交。中心区域的反射率为 低于其他两个地区的反射率。

公开(公告)号：US08437233B2

公开(公告)日：2013-05-07

申请号：US13642856

申请日：2010-12-15

申请人： Yusuke Kanatake ,  Tomo Kishigami ,  Toshiya Matozaki ,  Nobuo Takeshita

发明人： Yusuke Kanatake ,  Tomo Kishigami ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC分类号： G11B11/00

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

摘要： An optical recording/reproduction method and device that can perform control for optimizing the amount of spherical aberration in a multilayered optical disc in a short period of time. When the objective lens is displaced in the focusing direction, the amplitude value of the focusing error signal detected just after leaving the focal position of a given first recording layer and the amplitude value of the focusing error signal detected just before passing through the focal position of a given second recording layer other than the first recording layer are measured with a particular spherical aberration, the amplitude ratio of amplitude values is calculated, the difference between spherical aberration and the optimal spherical aberration for the second recording layer is approximated as a function of the amplitude ratio, the optimal spherical aberration is calculated on the basis of this approximation, and the spherical aberration is set.

摘要翻译： 一种能够在短时间内对多层光盘中的球面像差的量进行优化的光记录再现方法和装置。 当物镜在聚焦方向上移位时，恰好在离开给定第一记录层的焦点位置之后检测到的聚焦误差信号的振幅值和刚刚通过焦点位置之前检测到的聚焦误差信号的振幅值 以特定的球面像差测量除了第一记录层之外的给定的第二记录层，计算振幅值的幅度比，将第二记录层的球面像差和最佳球面差之差近似为 基于该近似值计算最佳球面像差，并设置球面像差。

公开(公告)号：US08358568B2

公开(公告)日：2013-01-22

申请号：US13203799

申请日：2010-04-07

申请人： Tomo Kishigami ,  Koichi Ikuta ,  Nobuo Takeshita ,  Yoshihiro Kiyose ,  Yusuke Kanatake

发明人： Tomo Kishigami ,  Koichi Ikuta ,  Nobuo Takeshita ,  Yoshihiro Kiyose ,  Yusuke Kanatake

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/005 ,  G11B7/1267

摘要： According to a method for setting the laser beam power applied to reproduce information recorded on an optical disc, information recorded in a region on the optical disc is reproduced using three or more test reproduction powers (S22B), the number of reproductions until the degradation of the quality of the reproduced signal reaches a prescribed value is determined as the degradation number of reproductions (S22F), the relation between the test reproduction power and the degradation number of reproductions is approximated by a curve, and a reproduction power restricting the degradation of the reproduced signal quality to a predetermined amount or less over a certain guaranteed number of reproductions is determined (S25F). In optical reproduction from an optical disc on which information is recorded, the optimum power of irradiation for reproduction can be set, and degradation of the information due to the reproducing light can be prevented.

摘要翻译： 根据用于设置用于再现记录在光盘上的信息的激光束功率的方法，使用三个或更多个测试再现功率（S22B）再现记录在光盘上的区域中的信息，直到再次使用 将再现信号的质量达到规定值确定为再现的劣化次数（S22F），则通过曲线近似测试再现功率和再现的退化次数之间的关系，并且限制了再现的劣化 确定在一定的保证数量的再现的再现信号质量达预定量或更小的值（S25F）。 在从记录有信息的光盘进行光学再现时，可以设置用于再现的照射的最佳功率，并且可以防止由于再现光引起的信息的劣化。

公开(公告)号：US08270284B2

公开(公告)日：2012-09-18

申请号：US11885145

申请日：2006-02-21

申请人： Nobuo Takeshita ,  Noboru Yashima ,  Masaharu Ogawa

发明人： Nobuo Takeshita ,  Noboru Yashima ,  Masaharu Ogawa

IPC分类号： G11B7/24

CPC分类号： G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

摘要： The present invention relates to optical disks and optical disk devices, and has an object to reduce access time and prevent malfunction. To attain the above object, in an optical disk (100), a management information area (130) is placed inside a user data area (140), namely, at the innermost circumference position of the optical disk (100), in an information layer (101) placed at the farthest position from the surface. A position information area (132) that stores position information indicating the position of each information layer in a thickness direction of the optical disk (100) is placed in the management information area (130).

摘要翻译： 本发明涉及光盘和光盘装置，其目的是减少访问时间并防止故障。 为了实现上述目的，在光盘（100）中，将管理信息区域（130）放置在用户数据区域（140）内，即位于光盘（100）的最内圆周位置处的信息中 层（101）位于离表面最远的位置。 将存储指示光盘（100）的厚度方向上的各信息层的位置的位置信息的位置信息区域（132）放置在管理信息区域（130）中。

公开(公告)号：US08248907B2

公开(公告)日：2012-08-21

申请号：US11822249

申请日：2007-07-03

申请人： Hironori Nakahara ,  Nobuo Takeshita ,  Masaharu Ogawa

发明人： Hironori Nakahara ,  Nobuo Takeshita ,  Masaharu Ogawa

IPC分类号： G11B7/24

CPC分类号： G11B7/00736 ,  G11B7/0901 ,  G11B7/24038 ,  G11B2007/0013

摘要： In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.

公开(公告)号：US08125869B2

公开(公告)日：2012-02-28

申请号：US12153965

申请日：2008-05-28

申请人： Yusuke Kanatake ,  Tomo Kishigami ,  Nobuo Takeshita

发明人： Yusuke Kanatake ,  Tomo Kishigami ,  Nobuo Takeshita

IPC分类号： G11B7/00

CPC分类号： G11B7/0062 ,  G11B7/1267

摘要： To adjust the parameters of a write strategy for recording data on an optical recording medium, the jitter value of a reproduced signal obtained from recorded data is detected. If the jitter value exceeds a prescribed threshold, a write strategy parameter having a comparatively small effect on the jitter value is adjusted, and subsequent data are written on the recording medium using the adjusted parameter. Parameters are selected for adjustment in ascending order of their effect on the jitter value. Stable data recording can thereby be carried out without significant jitter degradation.

摘要翻译： 为了调整用于在光学记录介质上记录数据的写入策略的参数，检测从记录数据获得的再现信号的抖动值。 如果抖动值超过规定的阈值，则调整对抖动值的影响较小的写入策略参数，并且使用调整后的参数将后续的数据写入记录介质。 选择参数来调整其对抖动值的影响的升序。 从而可以在没有显着的抖动劣化的情况下执行稳定的数据记录。

公开(公告)号：US20120014237A1

公开(公告)日：2012-01-19

申请号：US13258538

申请日：2010-05-21

申请人： Kenya Nakai ,  Masayuki Ohmaki ,  Nobuo Takeshita

发明人： Kenya Nakai ,  Masayuki Ohmaki ,  Nobuo Takeshita

IPC分类号： G11B20/10

CPC分类号： G11B7/005 ,  G11B7/131 ,  G11B20/10009 ,  G11B20/10027 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/10416 ,  G11B2220/2595

摘要： A first signal is detected from the central part of a light beam returning from a super-resolution optical disc; a second signal is detected from a peripheral part in a direction corresponding to a track on the super-resolution optical disc; a gain adjustment unit is provided to adjust the amplitude of the first signal; a subtraction unit is provided to generate a third signal by subtracting, from the second signal, the first signal with the amplitude adjusted by the gain adjustment unit; and an unit is provided to generate a reproduced signal by combining the first signal and a signal obtained by delaying the third signal.

摘要翻译： 从从超分辨率光盘返回的光束的中心部分检测第一信号; 在与超分辨率光盘上的轨道对应的方向上从外围部分检测第二信号; 提供增益调整单元来调整第一信号的幅度; 减法单元被提供以通过从第二信号中减去由增益调整单元调整的幅度的第一信号来产生第三信号; 并且提供单元以通过组合第一信号和通过延迟第三信号而获得的信号来产生再现信号。

公开(公告)号：US08018812B2

公开(公告)日：2011-09-13

申请号：US11878463

申请日：2007-07-24

申请人： Hironori Nakahara ,  Nobuo Takeshita ,  Masaharu Ogawa

发明人： Hironori Nakahara ,  Nobuo Takeshita ,  Masaharu Ogawa

IPC分类号： G11B7/20

CPC分类号： G11B27/329 ,  G11B7/00736 ,  G11B7/0079 ,  G11B7/0945 ,  G11B7/1275 ,  G11B7/24038 ,  G11B19/122 ,  G11B20/1217 ,  G11B27/105 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2220/235

摘要： In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.