公开(公告)号：US07327642B2

公开(公告)日：2008-02-05

申请号：US10423796

申请日：2003-04-25

申请人： Shinichi Yamada ,  Katsuya Watanabe ,  Yuichi Kuze ,  Kenji Fujiune ,  Kenji Kondo ,  Takashi Kishimoto ,  Takeharu Yamamoto

发明人： Shinichi Yamada ,  Katsuya Watanabe ,  Yuichi Kuze ,  Kenji Fujiune ,  Kenji Kondo ,  Takashi Kishimoto ,  Takeharu Yamamoto

IPC分类号： G11B7/095

CPC分类号： G11B7/13925 ,  G11B7/08511 ,  G11B7/0908 ,  G11B7/0945 ,  G11B7/0956 ,  G11B2007/0013

摘要： An optical disc drive includes a light source, a lens, a focusing section, a spherical aberration corrector, a focus signal generator, a gain calculator and a processor. The focusing section forms a beam spot in a focusing state on the information storage layer of an optical disc by controlling the position of the lens. The spherical aberration corrector changes a spherical aberration with the beam spot in a focusing state according to a drive value of a driving signal supplied to the spherical aberration corrector. The focus signal generator generates a focus signal representing the focusing state of the beam spot. The gain calculator calculates a loop gain of a focus control system in response to the focus signal. The processor determines the drive value for the spherical aberration corrector by the loop gain.

摘要翻译： 光盘驱动器包括光源，透镜，聚焦部分，球面像差校正器，聚焦信号发生器，增益计算器和处理器。 聚焦部分通过控制透镜的位置在光盘的信息存储层上形成聚焦状态的光斑。 球面像差校正器根据提供给球面像差校正器的驱动信号的驱动值，将聚焦状态下的束斑改变为球面像差。 聚焦信号发生器产生表示束斑的聚焦状态的聚焦信号。 增益计算器响应于聚焦信号计算聚焦控制系统的环路增益。 处理器通过环路增益确定球面像差校正器的驱动值。

公开(公告)号：US20130121122A1

公开(公告)日：2013-05-16

申请号：US13813278

申请日：2012-05-29

申请人： Kenji Kondo ,  Takeharu Yamamoto ,  Kenji Fujiune

发明人： Kenji Kondo ,  Takeharu Yamamoto ,  Kenji Fujiune

IPC分类号： G11B7/1392

CPC分类号： G11B7/13927 ,  G11B7/0946 ,  G11B7/0948 ,  G11B7/1387 ,  G11B7/24038 ,  G11B7/2405

摘要： Provided is an optical disc device including a focus control unit for performing control so that a convergent point of a main beam converges on a predetermined information layer, a tracking control unit for performing control so that the convergent point of the main beam scans a predetermined track or a predetermined mark sequence on an information layer, a sub beam receiving unit for receiving a sub beam reflected off the information layer and outputting a signal according to an amount of beam received, and a microcomputer for detecting, during a recording operation of recording the information, a focus loss-of-control state where the convergent point of the main beam deviates from the predetermined information layer or a tracking loss-of-control state where the convergent point of the main beam deviates from the predetermined track or the predetermined mark sequence on the information layer.

摘要翻译： 提供了一种光盘装置，包括：聚焦控制单元，用于执行控制，使得主光束的会聚点会聚在预定信息层上;跟踪控制单元，用于执行控制，使得主光束的会聚点扫描预定轨迹 或信息层上的预定标记序列，子波束接收单元，用于接收从信息层反射的子波束并根据所接收的波束的量输出信号;以及微计算机，用于在记录操作期间检测记录 信息，主波束的收敛点偏离预定信息层的焦点失控状态或主波束的收敛点偏离预定轨迹或预定标记的跟踪失控状态 序列在信息层上。

公开(公告)号：US08526287B2

公开(公告)日：2013-09-03

申请号：US13637520

申请日：2011-11-09

申请人： Kenji Kondo ,  Kenji Fujiune ,  Takeharu Yamamoto

发明人： Kenji Kondo ,  Kenji Fujiune ,  Takeharu Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1387 ,  G11B7/094 ,  G11B7/0941 ,  G11B2007/13727

摘要： Provided is an optical disk apparatus capable achieving stable focus control or tracking control. A first detector receives reflected light from an object lens optical system, a second detector receives reflected light from a prescribed information layer, a positional deviation determination unit determines positional deviation between a focal point of a light beam and a point where information on the prescribed information layer is recorded or reproduced, on the basis of a signal from the second detector, a stray light determination unit determines a surface stray light component which is reflected light from the surface of an optical disk and is included in the signal from the positional deviation determination unit, on the basis of the signal from the first detector, and a stray light correction unit corrects the signal output from the positional deviation determination unit on the basis of the surface stray light component thus determined.

摘要翻译： 提供一种能够实现稳定的聚焦控制或跟踪控制的光盘装置。 第一检测器接收来自物镜光学系统的反射光，第二检测器接收来自规定信息层的反射光，位置偏差确定单元确定光束焦点与其中关于规定信息的信息的位置偏差 层被记录或再现，基于来自第二检测器的信号，杂散光确定单元确定作为来自光盘表面的反射光的表面杂散光分量，并且包括在来自位置偏差确定的信号中 基于来自第一检测器的信号，并且杂散光校正单元基于由此确定的表面杂散光分量来校正从位置偏差确定单元输出的信号。

公开(公告)号：US20130100787A1

公开(公告)日：2013-04-25

申请号：US13807561

申请日：2012-04-25

申请人： Kenji Fujiune ,  Takeharu Yamamoto ,  Kenji Kondo

发明人： Kenji Fujiune ,  Takeharu Yamamoto ,  Kenji Kondo

IPC分类号： G11B21/10

CPC分类号： G11B21/106 ,  G11B7/00736 ,  G11B7/08511 ,  G11B7/0956 ,  G11B2007/0013

摘要： An optical head (10) focuses and irradiates a servo light beam onto at least one servo layer, and focuses and irradiates a recording/reproducing light beam onto a plurality of recording layers. An initial recording unit (20) records layer position information for specifying a position of each recording layer in advance in a predetermined position of each recording layer before recording user data in use of the recording/reproducing light beam, a layer position detection unit (21) reads layer position information in a predetermined recording layer by using the recording/reproducing light beam, and detects which one of the plurality of recording layers is the predetermined recording layer where the focal point of the recording/reproducing light beam is positioned, based on the read layer position information, and a seeking unit (22) moves the focal point of the recording/reproducing light beam to a target position based on the detected layer position.

摘要翻译： 光头（10）将伺服光束聚焦并照射到至少一个伺服层上，并将记录/再现光束聚焦并照射到多个记录层上。 初始记录单元（20）在使用记录/再现光束记录用户数据之前，在每个记录层的预定位置预先记录用于指定每个记录层的位置的层位置信息，层位置检测单元（21 ）通过使用记录/再现光束在预定记录层中读取层位置信息，并且基于记录/再现光束的位置来检测多个记录层中的哪个记录层是记录/再现光束的焦点的预定记录层 读取层位置信息和搜索单元（22）基于检测到的层位置将记录/再现光束的焦点移动到目标位置。

公开(公告)号：US20130016594A1

公开(公告)日：2013-01-17

申请号：US13637520

申请日：2011-11-09

申请人： Kenji Kondo ,  Kenji Fujiune ,  Takeharu Yamamoto

发明人： Kenji Kondo ,  Kenji Fujiune ,  Takeharu Yamamoto

IPC分类号： G11B20/00

CPC分类号： G11B7/1387 ,  G11B7/094 ,  G11B7/0941 ,  G11B2007/13727

摘要： Provided is an optical disk apparatus capable achieving stable focus control or tracking control. A first detector receives reflected light from an object lens optical system, a second detector receives reflected light from a prescribed information layer, a positional deviation determination unit determines positional deviation between a focal point of a light beam and a point where information on the prescribed information layer is recorded or reproduced, on the basis of a signal from the second detector, a stray light determination unit determines a surface stray light component which is reflected light from the surface of an optical disk and is included in the signal from the positional deviation determination unit, on the basis of the signal from the first detector, and a stray light correction unit corrects the signal output from the positional deviation determination unit on the basis of the surface stray light component thus determined.

摘要翻译： 提供一种能够实现稳定的聚焦控制或跟踪控制的光盘装置。 第一检测器接收来自物镜光学系统的反射光，第二检测器接收来自规定信息层的反射光，位置偏差确定单元确定光束焦点与其中关于规定信息的信息的位置偏差 层被记录或再现，基于来自第二检测器的信号，杂散光确定单元确定作为来自光盘表面的反射光的表面杂散光分量，并且包括在来自位置偏差确定的信号中 基于来自第一检测器的信号，并且杂散光校正单元基于由此确定的表面杂散光分量来校正从位置偏差确定单元输出的信号。

公开(公告)号：USRE41372E1

公开(公告)日：2010-06-08

申请号：US10750527

申请日：2003-12-31

申请人： Yuu Okada ,  Kenji Fujiune ,  Katsuya Watanabe ,  Takeharu Yamamoto ,  Jun Kikuchi

发明人： Yuu Okada ,  Kenji Fujiune ,  Katsuya Watanabe ,  Takeharu Yamamoto ,  Jun Kikuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/0946 ,  G11B7/08511 ,  G11B7/0945 ,  G11B7/0948 ,  G11B2007/0006

摘要： An optical disc apparatus includes: a converging section for converging a light beam and irradiating a rotating information medium with the converged light beam; a moving section for moving the converging section, thereby moving a converging point of the converged light beam in a direction perpendicular to an information surface of the information medium; a converging state detection section for generating a focus servo signal which represents a converging state of the light beam on the information medium based on reflected light or transmitted light of the light beam from the information medium; a focus servo control section for controlling the moving section based on the focus servo signal, so that the light beam reaches a predetermined converging state on the information medium; and a focus pull-in section for turning ON the control by the focus servo control section, wherein the focus pull-in section turns ON the control by the focus servo control section in a case where the focus pull-in section determines that the converging point of the light beam is located in the vicinity of the minimum velocity position on the information medium axial deviation.

摘要翻译： 一种光盘装置，包括：聚光部分，用于会聚光束并用会聚光束照射旋转的信息介质; 移动部分，用于移动会聚部分，从而沿着与信息介质的信息表面垂直的方向移动会聚光束的会聚点; 收敛状态检测部分，用于基于来自信息介质的光束的反射光或透射光产生表示光束在信息介质上的会聚状态的聚焦伺服信号; 聚焦伺服控制部分，用于基于聚焦伺服信号控制移动部分，使得光束在信息介质上达到预定的会聚状态; 以及聚焦引入部，用于使聚焦伺服控制部的控制接通，其中，在聚焦引入部确定会聚的情况下，聚焦引入部使聚焦伺服控制部的控制接通 光点的位置位于信息介质轴向偏差的最小速度位置附近。

公开(公告)号：US07218582B2

公开(公告)日：2007-05-15

申请号：US10735009

申请日：2003-12-12

申请人： Rie Takahashi ,  Takeharu Yamamoto ,  Takashi Kishimoto ,  Kenji Fujiune ,  Katsuya Watanabe

发明人： Rie Takahashi ,  Takeharu Yamamoto ,  Takashi Kishimoto ,  Kenji Fujiune ,  Katsuya Watanabe

IPC分类号： G11B7/00

CPC分类号： G11B7/094

摘要： An optical disc drive is used to read and/or write data from/on an optical disc having a data storage layer. The drive corrects electrical offset while reading and/or writing data. The drive updates a correction value based on an electrical offset detected at correcting operation or a value derived using electrical offset values that has been detected and stored, without detecting an electrical offset at correcting operation. Therefore, the optical disc drive can correct the electrical offset less often.

摘要翻译： 光盘驱动器用于从具有数据存储层的光盘上读取数据和/或写入数据。 驱动器在读取和/或写入数据时纠正电气偏移。 驱动器基于在校正操作中检测到​​的电偏移或使用已经被检测和存储的电偏移值导出的值而更新校正值，而不检测校正操作的电偏移。 因此，光盘驱动器可以更少地校正电偏移。

公开(公告)号：US20120170436A1

公开(公告)日：2012-07-05

申请号：US13322923

申请日：2011-05-31

申请人： Kenji Fujiune ,  Takeharu Yamamoto

发明人： Kenji Fujiune ,  Takeharu Yamamoto

IPC分类号： G11B7/1263

CPC分类号： G11B7/1267 ,  G11B7/0062

摘要： With a large capacity of an optical disk and high-speed recording, a frequency of a recording signal is increased and a pulse width is narrowed. In the case that a laser is driven by a signal having the short pulse width, unfortunately the high-speed recording is hardly performed to an optical disk when a rise time and a fall time of the optical pulse are lengthened.During user data recording, a bottom driving current is set to a second bottom driving current value that is a current value of a threshold or less, so that the rise time and the fall time of the optical pulse can be shortened to perform the high-speed recording of the optical disk.

摘要翻译： 利用大容量的光盘和高速记录，记录信号的频率增加并且脉冲宽度变窄。 在激光器由具有短脉冲宽度的信号驱动的情况下，不幸的是，当光脉冲的上升时间和下降时间延长时，几乎不对光盘执行高速记录。 在用户数据记录期间，将底部驱动电流设定为阈值以下的当前值的第二底部驱动电流值，从而能够缩短光脉冲的上升时间和下降时间， 速度记录光盘。

公开(公告)号：US06567357B2

公开(公告)日：2003-05-20

申请号：US09839522

申请日：2001-04-20

申请人： Takashi Kishimoto ,  Yuuichi Kuze ,  Kenji Fujiune ,  Takeharu Yamamoto ,  Katsuya Watanabe

发明人： Takashi Kishimoto ,  Yuuichi Kuze ,  Kenji Fujiune ,  Takeharu Yamamoto ,  Katsuya Watanabe

IPC分类号： G11B700

CPC分类号： G11B7/08511 ,  G11B2007/0013

摘要： An optical disk apparatus of the present invention measures a surface deflection component (shape of surface deflection) from a low-pass component of a compensating filter in a surface deflection measuring part provided in a DSP. Furthermore, the optical disk apparatus calculates timing at which a positional change in a surface deflection component in time required for focus jumping is a predetermined value or less in a timing calculating part, and starts focus jumping at the timing. Because of this, stable focus jumping is made possible.

摘要翻译： 本发明的光盘装置从设置在DSP中的表面偏转测量部中的补偿滤波器的低通分量测量表面偏转分量（表面偏转的形状）。 此外，光盘装置计算定时计算部分中聚焦跳跃所需时间中的表面偏转分量的位置变化为预定值或更小的定时，并且在定时开始聚焦跳跃。 因此，可以实现稳定的重点跳跃。

公开(公告)号：US06400663B1

公开(公告)日：2002-06-04

申请号：US09660766

申请日：2000-09-13

申请人： Yuu Okada ,  Kenji Fujiune ,  Katsuya Watanabe ,  Takeharu Yamamoto ,  Jun Kikuchi

发明人： Yuu Okada ,  Kenji Fujiune ,  Katsuya Watanabe ,  Takeharu Yamamoto ,  Jun Kikuchi

IPC分类号： G11B700

CPC分类号： G11B7/0946 ,  G11B7/08511 ,  G11B7/0945 ,  G11B7/0948 ,  G11B2007/0006

摘要： An optical disc apparatus includes: a converging section for converging a light beam and irradiating a rotating information medium with the converged light beam; a moving section for moving the converging section, thereby moving a converging point of the converged light beam in a direction perpendicular to an information surface of the information medium; a converging state detection section for generating a focus servo signal which represents a converging state of the light beam on the information medium based on reflected light or transmitted light of the light beam from the information medium; a focus servo control section for controlling the moving section based on the focus servo signal, so that the light beam reaches a predetermined converging state on the information medium; and a focus pull-in section for turning ON the control by the focus servo control section, wherein the focus pull-in section turns ON the control by the focus servo control section in a case where the focus pull-in section determines that the converging point of the light beam is located in the vicinity of the minimum velocity position on the information medium axial deviation.

摘要翻译： 一种光盘装置，包括：聚光部分，用于会聚光束并用会聚光束照射旋转的信息介质; 移动部分，用于移动会聚部分，从而沿着与信息介质的信息表面垂直的方向移动会聚光束的会聚点; 收敛状态检测部分，用于基于来自信息介质的光束的反射光或透射光产生表示光束在信息介质上的会聚状态的聚焦伺服信号; 聚焦伺服控制部分，用于基于聚焦伺服信号控制移动部分，使得光束在信息介质上达到预定的会聚状态; 以及聚焦引入部，用于使聚焦伺服控制部的控制接通，其中，在聚焦引入部确定会聚的情况下，聚焦引入部使聚焦伺服控制部的控制接通 光点的位置位于信息介质轴向偏差的最小速度位置附近。