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    Automatic gain adjustment device and automatic gain adjustment method
    4.
    发明公开
    Automatic gain adjustment device and automatic gain adjustment method 审中-公开
    装置：用于自动增益控制的自动增益控制方法和

    公开(公告)号：EP1465169A3

    公开(公告)日：2007-07-04

    申请号：EP04251890.2

    申请日：2004-03-30

    申请人： SONY CORPORATION

    发明人： Saito, Yasushi c/o Sony Corporation

    IPC分类号： G11B7/09

    CPC分类号： H03G3/30 ,  G11B7/0941 ,  G11B11/10576

    摘要： An automatic gain adjustment device and method capable of accurately adjusting a gain with a simple structure. In an automatic gain adjustment method of a feedback control system which uses a phase difference between an output signal obtained from a controlled object and an input signal while controlling the object based on the input signal, a phase shift amount is set so as to cause a frequency of the input signal to coincide with the crossover frequency at which the open loop gain forming the feedback control system becomes 0 dB, and a phase of the input signal is shifted based on the phase shift amount.

    Optical device
    5.
    发明公开
    Optical device 审中-公开
    光学器件

    公开(公告)号：EP1708186A3

    公开(公告)日：2006-10-18

    申请号：EP06014544.8

    申请日：2000-04-27

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Ijima, Shinichi Matsushita Electric Ind. Co. Ltd. ,  Takasuka, Shoichi Matsushita Electric Ind.Co. Ltd. ,  Nakanishi, Naoki Matsushita Electric Ind. Co. Ltd. ,  Nakanishi, Hideyuki Matsushita Electric Ind.Co.Ltd ,  Yoshikawa, Akio Matsushita Electric Ind.Co. Ltd.

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1353 ,  G02B5/1866 ,  G11B7/0903 ,  G11B7/123 ,  G11B7/1356 ,  G11B11/10543 ,  G11B11/10576

    摘要： An optical device includes a light-emitting element (1) for irradiating light onto an information recording medium (6), a diffraction grating (2) for splitting light emitted from said light-emitting element into a plurality of beams, a focussing member (5) for focussing the plurality of beams onto the information recording medium (6), a deflection member (3) for deflecting the plurality of beams after they have been reflected from the information recording medium; and a photodetector (7) for receiving the plurality of beams after they have been deflected by the deflection member. The diffraction grating (2) comprising a non-grating region. The zero-order diffraction light in the non-grating region is used as the main beam for reproducing the information signal, and the +1-order or -1-order diffraction light in the grating region is used as sub-beams for reproduction of the tracking error signal. Thus, the light amount of both the main beam and the sub-beams can be increased without increasing the light emission of the semiconductor laser element 1, and the S/N ratio of the main beam and the sub-beams can be enhanced.

    摘要翻译： 一种光学装置包括：用于将光照射到信息记录介质（6）上的发光元件（1），用于将从所述发光元件发射的光分成多个光束的衍射光栅（2），聚焦元件 5），用于将多个光束聚焦到信息记录介质（6）上;偏转部件（3），用于在多个光束从信息记录介质反射后使其偏转; 和一个光检测器（7），用于在多个光束被偏转元件偏转之后接收多个光束。 衍射光栅（2）包括非光栅区域。 非光栅区域中的零级衍射光被用作用于再现信息信号的主光束，并且光栅区域中的+1级或-1级衍射光被用作用于再现 跟踪误差信号。 因此，可以在不增加半导体激光元件1的发光的情况下增加主光束和副光束的光量，并且可以增强主光束和副光束的S / N比。

    Optical device
    6.
    发明公开
    Optical device 审中-公开
    Optische Vorrichtung

    公开(公告)号：EP1708186A2

    公开(公告)日：2006-10-04

    申请号：EP06014544.8

    申请日：2000-04-27

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Ijima, Shinichi Matsushita Electric Ind. Co. Ltd. ,  Takasuka, Shoichi Matsushita Electric Ind.Co. Ltd. ,  Nakanishi, Naoki Matsushita Electric Ind. Co. Ltd. ,  Nakanishi, Hideyuki Matsushita Electric Ind.Co.Ltd ,  Yoshikawa, Akio Matsushita Electric Ind.Co. Ltd.

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1353 ,  G02B5/1866 ,  G11B7/0903 ,  G11B7/123 ,  G11B7/1356 ,  G11B11/10543 ,  G11B11/10576

    摘要： An optical device includes a light-emitting element (1) for irradiating light onto an information recording medium (6), a diffraction grating (2) for splitting light emitted from said light-emitting element into a plurality of beams, a focussing member (5) for focussing the plurality of beams onto the information recording medium (6), a deflection member (3) for deflecting the plurality of beams after they have been reflected from the information recording medium; and a photodetector (7) for receiving the plurality of beams after they have been deflected by the deflection member. The diffraction grating (2) has a first grating region and a second grating region, which have different diffraction efficiencies. The zero-order diffraction light in the first grating region is used as the main beam for reproducing the information signal, and the +1-order or -1-order diffraction light in the second grating regions is used as sub-beams for reproduction of the tracking error signal. Thus, the light amount of both the main beam and the sub-beams can be increased without increasing the light emission of the semiconductor laser element 1, and the S/N ratio of the main beam and the sub-beams can be enhanced.

    摘要翻译： 光学装置包括用于将光照射到信息记录介质（6）上的发光元件（1），用于将从所述发光元件发射的光分成多个光束的衍射光栅（2），聚焦部件 5），用于将多个光束聚焦到信息记录介质（6）上;偏转构件（3），用于在已经从信息记录介质反射之后偏转多个光束; 以及用于在被偏转构件偏转之后接收多个光束的光电检测器（7）。 衍射光栅（2）包括非光栅区域。 将非光栅区域中的零级衍射光用作再现信息信号的主光束，并且将光栅区域中的+ 1级或-1级衍射光用作用于再现 跟踪误差信号。 因此，可以在不增加半导体激光元件1的发光的情况下增加主光束和子光束的光量，并且可以提高主光束和子光束的S / N比。

    DATA REPRODUCING DEVICE
    7.
    发明公开
    DATA REPRODUCING DEVICE 审中-公开
    DATENWIEDERGABEEINRICHTUNG

    公开(公告)号：EP1659577A1

    公开(公告)日：2006-05-24

    申请号：EP03818542.7

    申请日：2003-08-29

    申请人： FUJITSU LIMITED

    发明人： KANAOKA, Toshikazu, Fujitsu Limited

    IPC分类号： G11B7/005 ,  G11B7/0045 ,  G11B7/09 ,  G11B20/10

    CPC分类号： G11B20/22 ,  G11B7/005 ,  G11B7/094 ,  G11B7/0956 ,  G11B7/1263 ,  G11B7/1267 ,  G11B11/10515 ,  G11B11/10576 ,  G11B11/10595 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/18 ,  G11B2020/1062 ,  G11B2020/1457

    摘要： It is an object of the present invention to provide a data reproducer in which the quality of a reproduction signal is improved. A data reproducer of the present invention includes a phase-difference detecting section which obtains the cross correlation value between the head pattern in a track to be reproduced and a reproduction signal, synchronous detectors which respectively obtain the cross correlation value between the head pattern of a track adjacent to the track to be reproduced and the reproduction signal, and crosstalk value detector which obtains the direction and ratio of crosstalk in accordance with these cross correlation values. The data reproducer has a correcting function which corrects the offset and gain of a reproduction signal in accordance with a phase difference and cross correlation value obtained by the phase-difference detecting section.

    摘要翻译： 本发明的目的是提供一种数据再现器，其中提高了再现信号的质量。 本发明的数据再现装置包括：相位差检测部，其获得要再现的磁道中的磁头图案与再现信号之间的互相关值;分别获得磁头图案的相互相关值的同步检测器; 跟踪要再现的轨道的跟踪和再现信号，以及串扰值检测器，其根据这些互相关值获得串扰的方向和比率。 数据再现器具有根据由相位差检测部分获得的相位差和互相关值来校正再现信号的偏移和增益的校正功能。

    Micro-actuator, manufacturing method thereof, optical pickup head of optical recording/reproducing apparatus with micro-actuator and fabrication method thereof
    9.
    发明公开
    Micro-actuator, manufacturing method thereof, optical pickup head of optical recording/reproducing apparatus with micro-actuator and fabrication method thereof 审中-公开
    微致动器尝试，制造过程中，光学记录的光学拾取头/微型激励器带和生产方法再现装置

    公开(公告)号：EP1398766A2

    公开(公告)日：2004-03-17

    申请号：EP03017986.5

    申请日：2003-08-07

    申请人： LG ELECTRONICS INC.

    发明人： Yee, Young-Joo

    IPC分类号： G11B7/00

    CPC分类号： G11B11/10576 ,  G11B7/0925 ,  G11B7/0937 ,  G11B7/122 ,  G11B7/22 ,  G11B11/10554 ,  G11B11/1058

    摘要： A micro-actuator, its manufacturing method, an optical pickup head of an optical recording/reproducing apparatus having the micro-actuator, and its manufacturing method are disclosed. A low voltage and low power bi-directional driving is accomplished so that a size and a weight of a system can be considerably reduced and a response speed can be improved. A uniformity and a production efficiency are heightened by reducing a alignment tolerance. In addition, a configuration tolerance caused due to an uneven thickness of a protection layer of the record layer on the disk and an uneven smoothness of the disk is corrected, so that a focal point of an objective lens can be optimally made on a record layer of the disk.

    摘要翻译： 一种微致动器，其制造方法，以/的光学记录的光学拾取头具有微致动器再生装置，及其制造方法是游离缺失光盘。 低电压和低功耗的双向驱动完成所以没有一个尺寸和一个系统的重量可以显着减小并且响应速度可以提高。 均匀性和生产效率都通过减少对准公差提高。 此外，配置公差引起了对在磁盘上和在盘的凹凸的平滑的记录层的保护层的厚度不均匀进行校正，所以没有一个物镜的焦点可以是一个记录层上进行OPTI马利 的磁盘。

    Focus servo controlling apparatus, information reproducing apparatus and information recording apparatus
    10.
    发明公开
    Focus servo controlling apparatus, information reproducing apparatus and information recording apparatus 有权
    Vorrichtung zur Fokusierungsservoreglung，InformationswiedergabegerätundInformationsaufzeichnungsgerät

    公开(公告)号：EP1091352A3

    公开(公告)日：2003-07-09

    申请号：EP00121303.2

    申请日：2000-10-06

    申请人： Pioneer Corporation

    发明人： Abe, Shinichiro, Pioneer Corporation ,  Iijima, Takayuki, Pioneer Corporation

    IPC分类号： G11B7/09 ,  G11B7/085

    CPC分类号： G11B7/0945 ,  G11B7/0946 ,  G11B11/10576 ,  G11B11/10597

    摘要： A focus servo control is performed by changing a condition of a focus servo loop from an open condition to a close condition in correspondence with a level of a reflection light signal, which is obtained as a reflection light of a light beam reflected from an information record medium is detected by a light receiving element such as an optical pickup. A focus servo controlling apparatus is provided with: a disturbance level detecting device such as a servo control circuit for detecting a level of a disturbance light signal, which is obtained as a disturbance light other than the reflection light is received by the light receiving element; and a controlling device such as a system controller for setting a level, which is larger than the level of the disturbance light signal detected by the disturbance level detecting device, as a threshold level and for changing the condition of the focus servo loop from the open condition to the close condition on the basis of a timing when the level of the reflection light signal becomes equal to or larger than the set threshold level.

    摘要翻译： 通过将聚焦伺服环路的条件从打开状态改变为关闭状态，与作为从信息记录反射的光束的反射光获得的反射光信号的电平相对应地进行聚焦伺服控制 介质由诸如光学拾取器的光接收元件检测。 聚焦伺服控制装置具有：由光接收元件接收诸如用于检测作为除了反射光之外的干扰光获得的干扰光信号的电平的伺服控制电路的干扰电平检测装置; 以及诸如系统控制器的控制装置，用于将比由干扰电平检测装置检测到的干扰光信号的电平大的电平设置为阈值电平，并且用于将聚焦伺服环路的状态从开路 基于反射光信号的电平变为等于或大于设定的阈值电平的定时，使其处于关闭状态。