公开(公告)号：US5313447A

公开(公告)日：1994-05-17

申请号：US77969

申请日：1993-06-18

申请人： Nobuo Takeshita ,  Kenjiro Kime ,  Teruo Fujita ,  Hiroo Shimegi ,  Kazuo Okada

发明人： Nobuo Takeshita ,  Kenjiro Kime ,  Teruo Fujita ,  Hiroo Shimegi ,  Kazuo Okada

IPC分类号： G11B7/135

CPC分类号： G11B7/1359

摘要： An optical head for recording, reproducing or erasing data by emitting a light beam irradiated from a light source onto a recording medium. To reduce the height of the optical head, an optical axis shifting device is disposed between a light beam emitting device and a condensing device for condensing the light beam onto the recording medium. This optical axis shifting device shifts the first optical axis of the light beam from the light beam emitting device to a second optical axis positioned in parallel and spaced apart from each other. As the optical axis shifting device, there is preferable employed a prism having two reflecting faces lying in parallel, and the optical axis, after shifting is to be positioned downwardly of the position of the optical axis before shifting, thereby reducing the height of the optical head.

摘要翻译： 用于通过将从光源照射的光束发射到记录介质上来记录，再现或擦除数据的光学头。 为了降低光头的高度，光轴移动装置设置在光束发射装置和用于将光束聚集到记录介质上的聚光装置之间。 该光轴移动装置将光束的第一光轴从光束发射装置移动到彼此平行且间隔开的第二光轴。 作为光轴移动装置，优选使用具有平行的两个反射面的棱镜，移动后的光轴位于移动前的光轴的位置的下方，由此降低光学的高度 头。

公开(公告)号：US08787135B2

公开(公告)日：2014-07-22

申请号：US14114059

申请日：2012-02-17

申请人： Masayuki Omaki ,  Kenya Nakai ,  Nobuo Takeshita

发明人： Masayuki Omaki ,  Kenya Nakai ,  Nobuo Takeshita

IPC分类号： G11B20/10

CPC分类号： G11B20/10222 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/1024 ,  G11B20/10277 ,  G11B20/10462 ,  G11B2220/2537

摘要： Provided is a signal processing device including: an adaptive filter; a PRML circuit for sequentially generating binarized data from a filtered reproduced waveform by sampling at sampling points in a period based on a clock signal and sequentially generating a partial response waveform which is to be the target waveform from the binarized data; a calculating unit for sequentially calculating first phase errors from a difference between the target waveform and the filtered reproduced waveform; a limiting unit for outputting second phase errors by excluding a specific phase error from the first phase errors; and a clock generating unit for generating the clock signal of a frequency corresponding to the second phase errors; wherein the specific phase error includes a phase error at a time when the partial response waveform reaches a specific level which excludes at least a level not less than a predetermined amplitude level.

摘要翻译： 提供一种信号处理装置，包括：自适应滤波器; PRML电路，用于基于时钟信号在一个周期的采样点采样从所滤波的再现波形顺序地生成二值化数据，并从二值化数据顺序地产生作为目标波形的部分响应波形; 计算单元，用于从目标波形和滤波的再现波形之间的差顺序地计算第一相位误差; 限制单元，用于通过从第一相位误差排除特定相位误差来输出第二相位误差; 以及时钟产生单元，用于产生与第二相位误差对应的频率的时钟信号; 其中所述特定相位误差包括当所述部分响应波形达到排除至少不小于预定幅度电平的电平的特定电平时的相位误差。

公开(公告)号：US20130114385A1

公开(公告)日：2013-05-09

申请号：US13811173

申请日：2011-07-25

申请人： Kenya Nakai ,  Masayuki Omaki ,  Nobuo Takeshita

发明人： Kenya Nakai ,  Masayuki Omaki ,  Nobuo Takeshita

IPC分类号： G11B7/24 ,  G11B7/09

CPC分类号： G11B7/24 ,  G11B7/0908 ,  G11B7/24038 ,  G11B7/24056 ,  G11B7/24065

摘要： An optical information recording medium includes at least one recording layer, a protective layer that transmits a focused laser beam, and a super-resolution functional layer that changes an optical characteristic in a local region smaller than the diffraction limit determined by the optical performance of the focusing optical system and the wavelength of the laser beam during at least the period of irradiation by the focused laser beam. The maximum thickness (K) between the light incidence surface of the protective layer and the recording layer is 0.083 mm.

摘要翻译： 光学信息记录介质包括至少一个记录层，透射聚焦激光束的保护层和超分辨率功能层，该超分辨率功能层改变局部区域中的光学特性，该区域小于由光学性能决定的衍射极限 在聚焦的激光束的至少照射期间，聚焦光学系统和激光束的波长。 保护层的光入射面与记录层之间的最大厚度（K）为0.083mm。

公开(公告)号：US08385170B2

公开(公告)日：2013-02-26

申请号：US13142403

申请日：2010-02-04

申请人： Hironori Nakahara ,  Yoshihiro Kiyose ,  Toshiya Matozaki ,  Nobuo Takeshita

发明人： Hironori Nakahara ,  Yoshihiro Kiyose ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC分类号： G11B5/58 ,  G11B15/04 ,  G11B19/04 ,  G11B7/135

CPC分类号： G11B19/128

摘要： An optical disc device compatible with optical discs of different types having different track pitches, having a light detecting means (104) disposed in the path of diffracted light from the recording tracks on the optical disc (101), on which a light beam from a light emitting section (103) is incident. During the loading of the optical disc, the optical disc device discriminates the type of optical disc from the detection output of the light detecting means (104) and the positional relation between the optical disc (101) and the light detecting means (104). A simple structure thus enables the optical disc type to be discriminated.

摘要翻译： 一种与具有不同轨道间距的不同类型的光盘兼容的光盘装置，具有设置在来自光盘（101）上的记录轨道的衍射光的路径中的光检测装置（104），光检测装置 发光部（103）入射。 在光盘装入期间，光盘装置鉴别光检测装置（104）的检测输出和光盘（101）与光检测装置（104）之间的位置关系。 因此，简单的结构使得能够区分光盘类型。

公开(公告)号：US08295136B2

公开(公告)日：2012-10-23

申请号：US13174990

申请日：2011-07-01

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 ,  G11B7/00736 ,  G11B2007/0013

摘要： Before new information is recorded on a comparatively deep recording layer in a multilayer optical recording disc, a predetermined target value of a reproduced signal parameter is read from the disc itself or from a separate storage unit, the recorded/unrecorded states of the shallower recording layers are determined, and the target value is corrected on the basis of these states. The correction is based on a predetermined difference in the value of the reproduced signal parameter caused by a difference in the recorded/unrecorded states of the shallower recording layers. The corrected target value is used in calibration of the recording power by means of a test write. This correction of the target value permits reliable recording on a multilayer optical disc without delaying the start of the recording process.

摘要翻译： 在新信息被记录在多层光学记录盘中相对较深的记录层上之前，再现信号参数的预定目标值从盘本身或单独的存储单元读取，较浅记录层的记录/未记录状态 并且基于这些状态来校正目标值。 校正基于由较浅记录层的记录/未记录状态的差引起的再现信号参数的值的预定差异。 通过测试写入，校正目标值用于校准记录功率。 目标值的这种校正允许在多层光盘上的可靠记录，而不延迟开始记录处理。

公开(公告)号：US08254240B2

公开(公告)日：2012-08-28

申请号：US11822241

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： G11B7/24038 ,  G11B7/00736 ,  G11B7/0079

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：US08179750B2

公开(公告)日：2012-05-15

申请号：US13034735

申请日：2011-02-25

申请人： Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

发明人： Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1362 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup device includes a plurality of laser light sources emitting laser beams of different oscillation wavelengths, and a plurality of objective lenses on which the laser beams in the form of diverging beams emitted by the plurality of laser light sources are incident, and which directly focus the laser beams onto a recording surface of an optical disc. A rising mirror reflects a laser beam in the form of a diverging beam emitted by a laser light source of a predetermined oscillation wavelength among the plurality of laser light sources so as to lead the laser beam to one of the plurality of objective lenses, and transmits the laser beam in the form of a diverging beam emitted by the other laser light source. As the rising mirror transmits the laser beam in the form of the diverging beam emitted by said other laser light source, astigmatism is generated so as to correct existing astigmatism of the laser beam emitted by said other laser light source.

摘要翻译： 光拾取装置包括发射不同振荡波长的激光束的多个激光光源和由多个激光光源发射的发散光束形式的激光束入射的多个物镜，并且直接 将激光束聚焦到光盘的记录表面上。 上升反射镜反射出由多个激光源中的预定振荡波长的激光源发射的发散光束的形式的激光束，以将激光束引导到多个物镜中的一个，并传输 由另一激光光源发射的发散光束形式的激光束。 随着上升反射镜以由所述其它激光光源发射的发散光束的形式传输激光束，产生散光，以校正由所述其它激光光源发射的激光束的现有像散。

公开(公告)号：US08171506B2

公开(公告)日：2012-05-01

申请号：US11989584

申请日：2006-06-05

申请人： Keiji Nakamura ,  Mitoru Yabe ,  Nobuo Takeshita ,  Toshiya Matozaki

发明人： Keiji Nakamura ,  Mitoru Yabe ,  Nobuo Takeshita ,  Toshiya Matozaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/0932 ,  G11B7/0933 ,  G11B7/0935 ,  G11B2007/0006

摘要： An optical-system driving device is achieved that can switch over between objective lenses and is space-saving, lightweight, and simply-configured. An optical-system driving device for recording information onto or playing it back from an optical storage medium, includes a stationary unit having a rotation axis; a movable unit pivotable about the rotation axis; pivotal movement means for pivotally moving the movable unit about the rotation axis; and the movable unit includes a holder having a plurality of optical means that is able to focus a beam of light onto the optical storage medium, and a plurality of conductive elastic members for supporting the holder, wherein an optical axis of each of the plurality of optical means is located substantially equidistant from the rotation axis, and the optical means for focusing the beam of light onto the optical storage medium is selected by pivotally moving the movable unit with the rotation means.

摘要翻译： 实现了能够在物镜之间切换并且节省空间，重量轻且简单配置的光学系统驱动装置。 一种用于将信息记录到光学存储介质上或从光存储介质播放的光学系统驱动装置，包括具有旋转轴的固定单元; 围绕所述旋转轴线枢转的可移动单元; 枢转运动装置，用于围绕旋转轴线可动地移动可移动单元; 并且所述可移动单元包括具有能够将光束聚焦到所述光学存储介质上的多个光学装置的保持器，以及用于支撑所述保持器的多个导电弹性构件，其中，所述多个 光学装置基本上等距离旋转轴线，并且通过用旋转装置枢转地移动可移动单元来选择用于将光束聚焦到光学存储介质上的光学装置。

公开(公告)号：US08036086B2

公开(公告)日：2011-10-11

申请号：US11579832

申请日：2005-08-19

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.

摘要翻译： 在具有符合多个不同光盘标准的信息层的多层光盘中，由于每个信息层的类型不被记录在其他信息层中，所以在兼容的光盘装置的读写操作中，符合多个 光盘标准，每次被访问的信息层都改变时，必须读取信息层的类型，并选择一种生成适合于信息层类型的跟踪误差信号的方法，因此访问需要时间。 为了解决上述问题，在根据本发明的具有符合多个不同光盘标准的信息层的光学多层盘中，在信息层之一中的区域中记录关于其他信息层的信息 。 可以减少访问其他信息层所需的时间。

公开(公告)号：US20110235482A1

公开(公告)日：2011-09-29

申请号：US13128031

申请日：2009-12-07

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

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

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/094 ,  G11B7/0948 ,  G11B7/13925

摘要： An optical information processing method and apparatus performs a light irradiating and receiving step, a signal processing step, and an adjusting step of a spherical aberration and a focus offset on the basis of shift amount of first and second control devices and a performance evaluation value. The performance evaluation values for first, second, third and fourth points in an x and y coordinate system are detected, in which an x-coordinate is one of the shift amount of the first control device and the shift amount of the second control device and a y-coordinate is the other, the first point, second and third points having the same y-coordinate and different x-coordinates with each other, the fourth point being provided on a first straight line passing through the first point and being different from the first point.

摘要翻译： 光信息处理方法和装置基于第一和第二控制装置的移位量执行光照射和接收步骤，信号处理步骤和球面像差和聚焦偏移的调整步骤以及性能评估值。 检测x和y坐标系中的第一，第二，第三和第四点的性能评估值，其中x坐标是第一控制装置的移位量和第二控制装置的移位量之一，以及 y坐标是另一个，第一点，第二和第三点具有相同的y坐标和彼此不同的x坐标，第四点被提供在穿过第一点的第一直线上，并且不同于 第一点。