公开(公告)号：US06577565B1

公开(公告)日：2003-06-10

申请号：US09348124

申请日：1999-07-02

申请人： Naoharu Yanagawa ,  Masayoshi Yoshida ,  Yoshitaka Shimoda

发明人： Naoharu Yanagawa ,  Masayoshi Yoshida ,  Yoshitaka Shimoda

IPC分类号： G11B7095

CPC分类号： G11B7/1356 ,  G11B7/005 ,  G11B7/0909

摘要： An optical pickup for reading information from a recording medium having a plurality of prepits or for recording information onto the recording medium is provided. The optical pickup includes: a light emitting device for emitting a light beam to the recording medium; a dividing device for dividing the light beam reflected by the recording medium into a first divided beam and a second divided beam; an astigmatism producing device for producing astigmatism in the first divided beam; a first light receiving device for receiving the first divided beam from the astigmatism producing device; and a second light receiving device for receiving the second divided beam from the dividing device.

摘要翻译： 提供一种用于从具有多个预凹坑的记录介质读取信息或用于将信息记录到记录介质上的光学拾取器。 光拾取器包括：用于向记录介质发射光束的发光装置; 用于将由记录介质反射的光束划分成第一分割光束和第二分割光束的分割装置; 用于在第一分割光束中产生像散的散光产生装置; 第一光接收装置，用于从散光产生装置接收第一划分光束; 以及用于从分割装置接收第二分割光束的第二光接收装置。

公开(公告)号：US06549492B1

公开(公告)日：2003-04-15

申请号：US09344263

申请日：1999-06-30

申请人： Hubert Song

发明人： Hubert Song

IPC分类号： G11B7095

CPC分类号： G11B7/0941 ,  G11B7/0953 ,  G11B21/085 ,  G11B21/106

摘要： To correct for run-out in an optical disk drive, a run-out reducing gain factor is selected. A run-out correction signal is produced by applying the run-out reducing gain factor to a center error signal. A servo drive signal is refined with the run-out correction signal to produce an adjusted servo drive signal. A tracking actuator is driven with the adjusted servo drive signal.

摘要翻译： 要更正光盘驱动器中的耗尽，选择一个耗尽减少增益因子。 通过将去除减少增益因子应用于中心误差信号来产生跳动校正信号。 用跑出校正信号精练伺服驱动信号，产生调整后的伺服驱动信号。 跟踪致动器由调整后的伺服驱动信号驱动。

公开(公告)号：US06493296B1

公开(公告)日：2002-12-10

申请号：US09431839

申请日：1999-11-02

申请人： Atsushi Fukumoto ,  Shinichi Kai

发明人： Atsushi Fukumoto ,  Shinichi Kai

IPC分类号： G11B7095

CPC分类号： G11B7/0956 ,  G11B7/0903

摘要： An optical disc inclination detecting method for detecting an inclination angle of an optical disc with respect to a light spot, for recording information or reproducing information by irradiating the light spot on the optical disc by an optical pickup. The method includes dividing the light spot into a main spot and both side spots in a specified track and track crossing directions before and after the specified track, detecting signals corresponding to a reflected light from the optical disc by photo detectors corresponding to the main spot and both side spots, and generating a DPP (differential push-pull) signal from signals corresponding to the main spot and both side spots. The method also generates a DPD (differential phase direction) signal by comparing phases from the signals corresponding to the main spot, determining a differential operation value of the DPP and DPD signals, and detecting the inclination angle of the optical disc based on the differential operation value.

摘要翻译： 一种光盘倾斜检测方法，用于检测光盘相对于光点的倾斜角度，用于通过光学拾取器照射光盘上的光点来记录信息或再现信息。 该方法包括将光斑划分成主光点和在指定轨迹之前和之后的指定轨迹和轨迹交叉方向上的两个侧光点，通过与主光点相对应的光电检测器检测对应于来自光盘的反射光的信号，以及 并且从与主点和两个侧面点对应的信号产生DPP（差分推挽）信号。 该方法还通过比较来自与主光点相对应的信号的相位来确定DPP和DPD信号的差分运算值，以及基于差分运算来检测光盘的倾斜角度来生成DPD（差分相位方向）信号 值。

公开(公告)号：US06469961B2

公开(公告)日：2002-10-22

申请号：US09895255

申请日：2001-07-02

申请人： Yoshiyuki Akiyama ,  Shinichiro Iimura ,  Hiroshi Ogawa ,  Kazuo Kuroda ,  Toshio Suzuki ,  Akiyoshi Inoue ,  Shouji Taniguchi ,  Minemasa Ota

发明人： Yoshiyuki Akiyama ,  Shinichiro Iimura ,  Hiroshi Ogawa ,  Kazuo Kuroda ,  Toshio Suzuki ,  Akiyoshi Inoue ,  Shouji Taniguchi ,  Minemasa Ota

IPC分类号： G11B7095

CPC分类号： G11B7/24085 ,  G11B7/0053 ,  G11B7/007 ,  G11B7/00736 ,  G11B7/00745 ,  G11B7/0938 ,  G11B7/0943 ,  G11B7/24082 ,  G11B19/28

摘要： An optical recording medium for accurately deriving the address information or the disc rotation control information despite narrow track pitch and for recording signals to a high density, and a method and apparatus for recording and/or reproducing such optical recording medium. The optical recording medium has a wobbled groove and pits formed at a pre-set interval in an area between turns of the wobbled groove. The recording/reproducing method includes controlling rotation of the optical recording medium by a wobbled signal from the groove and detecting the position on the optical recording medium of a recording signal by pit signals detected from the pits. The recording/reproducing apparatus includes a detection device for detecting the wobbled signal from the groove and a detection device for detecting pit signals from the pits. The rotation of the optical recording medium is controlled by the wobbled signals detected from the groove and the position on the optical recording medium of the recording signal is detected by the pit signal detected from the pits.

摘要翻译： 尽管窄轨道间距和用于高密度记录信号的地址信息或盘旋转控制信息的精确地导出的光学记录介质，以及用于记录和/或再现这种光学记录介质的方法和装置。 光学记录介质具有摆动的凹槽和在摆动槽的匝之间的区域中以预先设定的间隔形成的凹坑。 记录/再现方法包括通过来自凹槽的摆动信号控制光学记录介质的旋转，并通过从凹坑检测的凹坑信号检测记录信号在光学记录介质上的位置。 记录/再现装置包括用于检测来自凹槽的摆动信号的检测装置和用于检测来自凹坑的凹坑信号的检测装置。 光记录介质的旋转由从凹槽检测到的摆动信号控制，记录信号的光学记录介质上的位置由从凹坑检测的凹坑信号检测。

公开(公告)号：US06426925B1

公开(公告)日：2002-07-30

申请号：US09555441

申请日：2000-07-11

申请人： Hiromu Watanabe

发明人： Hiromu Watanabe

IPC分类号： G11B7095

CPC分类号： G11B7/0956

摘要： The present invention relates to a recording and/or reproducing apparatus that records or reproduces information signals by scanning a signal recording surface of a rotated disk using a light beam irradiated from an optical pickup. Further, the present invention provides a skew adjustment based on a detection result from a detection unit detecting a return light beam that is irradiated onto the disk and is reflected thereon. The present invention comprises a disk rotating drive mechanism; a transfer mechanism that moves this rotating drive mechanism in a diametric direction of a mounted disk; an optical pickup unit that uses an objective lens to converge a light beam on a recording surface of a disk; a detection unit that irradiates a light beam onto the disk mounted on the rotating drive mechanism and detects a tilt of the disk mounted on the rotating drive mechanism based on the light beam returned from the disk; and an adjustment mechanism that provides a rotative movement based on a detection result from this detection unit around a center-axis line orthogonal to a line formed between an optical axis of the objective lens and the center of the disk.

摘要翻译： 本发明涉及通过使用从光学拾取器照射的光束扫描旋转盘的信号记录表面来记录或再现信息信号的记录和/或再现装置。 此外，本发明提供了一种基于来自检测单元的检测结果的偏斜调整，该检测单元检测照射到盘上并在其上反射的返回光束。 本发明包括盘旋转驱动机构; 传递机构，其使所述旋转驱动机构沿安装的盘的直径方向移动; 光学拾取单元，其使用物镜将光束会聚在盘的记录表面上; 检测单元，其将光束照射到安装在旋转驱动机构上的盘上，并基于从盘返回的光束检测安装在旋转驱动机构上的盘的倾斜度; 以及调节机构，其基于来自该检测单元的检测结果围绕与形成在物镜的光轴和盘的中心之间的线正交的中心轴线提供旋转运动。

公开(公告)号：US06396234B1

公开(公告)日：2002-05-28

申请号：US09503193

申请日：2000-02-14

申请人： Kiyoshi Tateishi

发明人： Kiyoshi Tateishi

IPC分类号： G11B7095

CPC分类号： G05B13/041 ,  G05B5/01 ,  G05B19/19 ,  G05B2219/41373 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0908 ,  G11B7/0909 ,  G11B7/0941

摘要： A servo control apparatus for performing a feedback control to a controlled system having characteristics represented by a characteristic equation including at least a second order term, a first order term and a zero order term, includes a disturbance estimating device that has an internal model having characteristics represented by a characteristic equation including only a second order term, and that estimates a disturbance applied to the controlled system by using the internal model, thereby generating an estimated disturbance value; and a compensating device that compensates the disturbance on the basis of the estimated disturbance value.

摘要翻译： 一种伺服控制装置，用于对具有由包括至少二阶项，一阶项和零阶项的特征方程表示的特性的受控系统进行反馈控制，包括具有内部模型的干扰估计装置，该内部模型具有特征 由仅包括二阶项的特征方程表示，并且通过使用内部模型来估计施加到受控系统的干扰，从而生成估计的干扰值; 以及补偿装置，其基于估计的干扰值补偿干扰。

公开(公告)号：US06229771B1

公开(公告)日：2001-05-08

申请号：US09169212

申请日：1998-10-09

申请人： Tatiana Kosoburd ,  Amir Alon ,  Shlomo Shapira ,  Michael Naor

发明人： Tatiana Kosoburd ,  Amir Alon ,  Shlomo Shapira ,  Michael Naor

IPC分类号： G11B7095

CPC分类号： G11B7/131 ,  G11B7/0909 ,  G11B7/0943 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/14

摘要： A focus detection system for use in a multi-beam optical pickup assembly is provided that uses an optical element, either a holographic element or diffractive element, to split beams reflected off of a data-bearing surface of an optical disk into a plurality of data beams and a plurality of focus beams. The optical element also introduces astigmatism into the focus beams. The focus beams are projected onto focus detectors configured to account for overlap between adjacent focus beams to produce an accurate focus error signal.

摘要翻译： 提供了一种用于多光束光学拾取器组件的焦点检测系统，其使用全息元件或衍射元件的光学元件将从光盘的数据承载表面反射的光束分成多个数据 光束和多个聚焦光束。 光学元件还将焦散射入聚焦光束。 聚焦光束被投影到被配置成考虑相邻聚焦光束之间重叠的焦点检测器，以产生准确的聚焦误差信号。