公开(公告)号：US20110063957A1

公开(公告)日：2011-03-17

申请号：US12776480

申请日：2010-05-10

申请人： Fumio ISSHIKI ,  Hideki Maruyama

发明人： Fumio ISSHIKI ,  Hideki Maruyama

IPC分类号： G11B20/18

CPC分类号： G11B7/094 ,  G11B7/0901 ,  G11B7/0903 ,  G11B2007/0013

摘要： In an optical disk apparatus, an optical pickup includes an actuator for driving an object lens, and a sensed signal output part for making it possible to generate a tracking error signal and a lens error signal by addition/subtraction, and a signal processor includes a servo signal generator for generating a tracking error signal and a lens error signal on the basis of a signal supplied from the sensed signal output part, and a tracking offset correction quantity signal generator supplied with the lens error signal to output a tracking offset correction quantity signal. DC (direct current) offset correction is conducted by conducting addition/subtraction between the tracking error signal and both the lens error signal and the tracking offset correction quantity signal.

摘要翻译： 在光盘装置中，光拾取器包括用于驱动物镜的致动器和用于使得可以通过加/减产生跟踪误差信号和透镜误差信号的感测信号输出部分，并且信号处理器包括： 伺服信号发生器，用于基于从感测信号输出部分提供的信号产生跟踪误差信号和透镜误差信号;以及跟踪偏移校正量信号发生器，其被提供有透镜误差信号，以输出跟踪偏移校正量信号 。 通过在跟踪误差信号与透镜误差信号和跟踪偏移校正量信号两者之间进行加法/减法来进行DC（直流）偏移校正。

公开(公告)号：US20110228654A1

公开(公告)日：2011-09-22

申请号：US12956167

申请日：2010-11-30

申请人： Fumio ISSHIKI ,  Hideki Maruyama

发明人： Fumio ISSHIKI ,  Hideki Maruyama

IPC分类号： G11B20/18

CPC分类号： G11B7/094 ,  G11B7/0903 ,  G11B7/0945

摘要： An optical disk apparatus includes an optical pickup and a signal processor. The optical pickup includes an actuator for driving an objective lens, and a detected light intensity signal output part for outputting a detected light intensity signal to the processor. The signal processor includes a servo signal generator for generating a main push-pull signal and a sub push-pull signal on the basis of the detected light intensity signal supplied from the detected light intensity signal output part, a signal generator for generating a differential push-pull signal and a lens error signal by conducting addition/subtraction on the main push-pull signal and the sub push-pull signal, and a tracking offset correction signal generator which is input with the lens error signal to output a tracking offset correction signal. The differential push-pull signal correction is conducted by conducting addition/subtraction between the differential push-pull signal and the tracking offset correction signal.

摘要翻译： 光盘装置包括光拾取器和信号处理器。 光学拾取器包括用于驱动物镜的致动器和用于将检测到的光强度信号输出到处理器的检测光强信号输出部分。 信号处理器包括：伺服信号发生器，用于根据从检测到的光强度信号输出部分提供的检测到的光强度信号产生主推挽信号和副推挽信号;信号发生器，用于产生差分推挽信号 通过对主推挽信号和副推挽信号进行加减法，以及跟踪偏移校正信号发生器，其输入了透镜误差信号以输出跟踪偏移校正信号 。 差分推挽信号校正通过在差分推挽信号和跟踪偏移校正信号之间进行加/减来进行。

公开(公告)号：US20130028063A1

公开(公告)日：2013-01-31

申请号：US13558393

申请日：2012-07-26

申请人： Fumio ISSHIKI

发明人： Fumio ISSHIKI

IPC分类号： G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0903 ,  G11B7/0941 ,  G11B7/0945

摘要： The amplitude deviation of a tracking error signal in an optical disk apparatus is reliably corrected by processing signals at low costs. A servo signal generator generates a tracking error signal and a lens error signal from a photodetected signal. A lens error deviation signal memory circuit stores the lens error signal generated at the servo signal generator, and reproduces the one-turn deviation of the lens error signal. A tracking error signal corrector learns an amplitude correcting value for the tracking error signal from the tracking error signal detected in reproducing the one-turn deviation of the lens error signal, and stores the amplitude correcting value in a correcting signal generator.

摘要翻译： 通过以低成本处理信号可靠地校正光盘装置中的跟踪误差信号的振幅偏差。 伺服信号发生器从光电检测信号产生跟踪误差信号和透镜误差信号。 镜头误差偏差信号存储电路存储在伺服信号发生器产生的镜头误差信号，再现镜头误差信号的单圈偏差。 跟踪误差信号校正器从再现镜头误差信号的一圈偏差中检测到的跟踪误差信号学习跟踪误差信号的幅度校正值，并将幅度校正值存储在校正信号发生器中。

公开(公告)号：US20090086611A1

公开(公告)日：2009-04-02

申请号：US12053797

申请日：2008-03-24

申请人： Fumio ISSHIKI ,  Katsuhiko Izumi

发明人： Fumio ISSHIKI ,  Katsuhiko Izumi

IPC分类号： G11B7/135

CPC分类号： G11B7/1275 ,  G11B7/1356 ,  G11B7/22 ,  G11B2007/0006 ,  G11B2007/0013

摘要： Provided are an optical pick up and an optical component used for the optical pickup which are capable of preventing or restraining occurrence of deviation and unbalance which are caused by assembly errors during manufacturing of optical components, a temperature variation or the like. The optical pickup comprises a laser, a polarization changeover element for changing over a direction of polarization of an optical beam emitted from the laser, a beam splitting element for splitting the laser beam into a plurality of optical paths in accordance with a direction of a polarization, a plurality of objective lenses for focusing laser beams onto a recording layer of the optical disc, a rise-up mirror, and a plurality of coupling lenses arranged respectively intermediate of the plurality of optical paths led to the plurality of objective lenses. The rise-up mirror is arranged intermediate of the plurality of optical paths led to the plurality of objective lenses and adapted to be used common to respective optical beams on the plurality of optical paths. The plurality of the coupling lenses are coupled to and held on one and the same drive portion.

摘要翻译： 提供了一种用于光学拾取器的光拾取器和光学部件，其能够防止或限制由光学部件制造期间的组装误差，温度变化等引起的偏差和不平衡的发生。 光拾取器包括激光器，用于切换从激光器发射的光束的偏振方向的偏振转换元件，用于根据偏振方向将激光束分成多个光路的分束元件 用于将激光束聚焦到光盘的记录层上的多个物镜，上升反射镜和分别设置在被引导到多个物镜的多个光路之间的多个耦合透镜。 上升反射镜被布置在被引导到多个物镜的多个光路中间，并且适用于多个光路上的相应光束共同使用。 多个耦合透镜联接并保持在同一个驱动部分上。

公开(公告)号：US20090129217A1

公开(公告)日：2009-05-21

申请号：US12355715

申请日：2009-01-16

申请人： Fumio ISSHIKI ,  Kunikazu Ohnishi ,  Nobuyuki Maeda ,  Takahiro Kurokawa ,  Takeshi Shimano

发明人： Fumio ISSHIKI ,  Kunikazu Ohnishi ,  Nobuyuki Maeda ,  Takahiro Kurokawa ,  Takeshi Shimano

IPC分类号： G11B7/08

CPC分类号： G11B7/13925 ,  G11B7/0033 ,  G11B7/0917 ,  G11B7/0945 ,  G11B2007/0013

摘要： A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and the residual aberration in the optical system. The spherical aberration and defocus are coarsely adjusted using the amplitude (PP amplitude) of the tracking error signal and then finely adjusted using the amplitude (RF amplitude) of the readout signal. Since the spherical aberration can properly be adjusted, it is possible to raise the reliability of the readout signal.

摘要翻译： 不管读出信号检测器的位置误差和光学系统中的残余像差如何，允许可重写光盘装置，光学信息记录和再现装置等将光学系统自动且适当地调整到最佳焦点状态。 使用跟踪误差信号的振幅（PP振幅）粗略调整球面像差和散焦，然后使用读出信号的振幅（RF幅度）进行微调。 由于可以适当地调节球面像差，所以可以提高读出信号的可靠性。