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    Error signal detecting apparatus of optical pickup adopting hologram grating
    1.
    发明授权
    Error signal detecting apparatus of optical pickup adopting hologram grating 有权
    采用全息光栅的光学拾取器的误差信号检测装置

    公开(公告)号：US6167004A

    公开(公告)日：2000-12-26

    申请号：US433296

    申请日：1999-11-03

    Applicant: Yong-jae Lee ,  Tae-Kyung Kim ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Byung-ryul Ryoo ,  Yong-ki Son ,  Seok-jung Kim

    Inventor： Yong-jae Lee ,  Tae-Kyung Kim ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Byung-ryul Ryoo ,  Yong-ki Son ,  Seok-jung Kim

    IPC: G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

    CPC classification number: G11B7/131 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/133 ,  G11B7/1353

    Abstract: An error signal detecting apparatus for an optical pickup employing a hologram grating, including a sensing lens for focusing light reflected from a recording medium, a hologram grating having first through fourth pattern regions arranged clockwise in a 2.times.2 matrix arrangement, for diffracting light incident from the sensing lens in different directions, wherein the first through fourth pattern regions a, b, c and d are formed such that a first focus of the +1st-order diffracted beams diffracted by the first and third pattern regions is relatively farther from the sensing lens than a second focus of the +1st-order diffracted beams diffracted by the second and fourth pattern regions, a photodetector disposed between the first and second focuses and having first through fourth light receiving units, for receiving the beams diffracted by the first through fourth pattern regions and independently photoelectrically converting the same, and a signal operation unit for detecting a focus error signal and/or a track error signal from detection signals of the light receiving parts. The error signal detecting apparatus can suppress generation of an offset of a focus error signal due to a change in the wavelength of a light source and an offsets of the focus error signal and track offset signal due to deviations of the photodetector.

    Abstract translation: 一种用于采用全息光栅的光学拾取器的误差信号检测装置，包括用于聚焦从记录介质反射的光的感测透镜，具有以2x2矩阵排列顺时针排列的第一至第四图案区域的全息图光栅，用于衍射从 感光透镜，其中第一至第四图案区域a，b，c和d被形成为使得由第一和第三图案区域衍射的+ 1级衍射光束的第一焦点相对较远离感测透镜 比由第二和第四图案区域衍射的+ 1级衍射光束的第二焦点，设置在第一和第二焦点之间并具有第一至第四光接收单元的光电检测器，用于接收由第一至第四图案衍射的光束 区域并独立地对其进行光电转换;以及信号操作单元，用于检测聚焦误差 信号和/或来自光接收部分的检测信号的轨道误差信号。 误差信号检测装置可以抑制由于光源的波长的变化引起的聚焦误差信号的偏移的产生以及由于光电检测器的偏差引起的聚焦误差信号和光道偏移信号的偏移。

    Optical pickup movable to control beam shift and field angle in an optical disk drive
    2.
    发明授权
    Optical pickup movable to control beam shift and field angle in an optical disk drive 有权
    光拾取器可移动以控制光盘驱动器中的光束偏移和场角

    公开(公告)号：US06381207B1

    公开(公告)日：2002-04-30

    申请号：US09410627

    申请日：1999-10-01

    Applicant: Byung-ryul Ryoo ,  Pyong-yong Seong ,  Seok-jung Kim ,  Yong-ki Son ,  Tae-kyung Kim ,  Yong-jae Lee ,  Jang-hoon Yoo

    Inventor： Byung-ryul Ryoo ,  Pyong-yong Seong ,  Seok-jung Kim ,  Yong-ki Son ,  Tae-kyung Kim ,  Yong-jae Lee ,  Jang-hoon Yoo

    IPC: G11B3302

    CPC classification number: G11B7/22

    Abstract: An optical pickup of an optical disk drive. The optical pickup includes a laser beam source for generating a laser beam; a pickup base having an objective lens for projecting the laser beam generated from the laser beam source to an information recording surface of an optical disk; a variation adjusting plate which is movably disposed on the pickup base to be moved in vertical and lateral directions, and has a rotational hole formed at a central portion thereof; and a rotation adjusting plate including a rotational section having a predetermined curvature which is inserted into the rotational hole of the variation adjusting plate, and with a laser beam source fixed therein, the rotation adjusting plate being rotated with respect to the variation adjusting plate. An optical system including a collimating lens and a reflective mirror is fixed to the pickup base. Since the light path with respect to the field angle and the beam shift is adjusted by moving and/or rotating the light emitting point of the laser beam source with respect to the light axis of the collimating lens, the size of the optical pickup becomes smaller. Further, since the collimating lens and the light source are fixed to the respective structures, the light path is controlled regardless of the focal distance of the collimating lens. Accordingly, if the focal distance of the collimating lens has to be lengthened, the beam shift and the field angle can be precisely adjusted without enlarging the optical pickup.

    Abstract translation: 光盘驱动器的光学拾取器。 光学拾取器包括用于产生激光束的激光束源; 具有用于将从激光束源产生的激光束投射到光盘的信息记录表面的物镜的拾取器基座; 可移动地设置在拾取器基座上以在垂直和横向方向上移动的变化调节板，并且具有形成在其中心部分的旋转孔; 以及旋转调节板，其包括插入到变化调节板的旋转孔中的具有预定曲率的旋转部分和固定在其中的激光束源，旋转调节板相对于变化调节板旋转。 包括准直透镜和反射镜的光学系统固定在拾取器基座上。 由于通过相对于准直透镜的光轴移动和/或旋转激光束源的发光点来调节相对于场角和光束偏移的光路，所以光拾取器的尺寸变小 。 此外，由于准直透镜和光源被固定到各个结构，所以不管准直透镜的焦距如何，都可以控制光路。 因此，如果准直透镜的焦距必须延长，则可以在不放大光学拾取器的情况下精确地调整光束偏移和场角。

    Optical pickup device capable of detecting stable error signal
    4.
    发明授权
    Optical pickup device capable of detecting stable error signal 有权
    能够检测稳定误差信号的光学拾取装置

    公开(公告)号：US06636464B1

    公开(公告)日：2003-10-21

    申请号：US09588224

    申请日：2000-06-06

    Applicant: Yong-jae Lee ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Byung-ryul Ryoo ,  Yong-ki Son

    Inventor： Yong-jae Lee ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Byung-ryul Ryoo ,  Yong-ki Son

    IPC: G11B700

    CPC classification number: G11B7/1353 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/094 ,  G11B7/131

    Abstract: An optical pickup device employing a signal detection unit including a hologram element having a plurality of pattern regions for diffracting and/or focusing light reflected and incident from a recording medium, a photodetector having a plurality of light receiving regions for receiving and photoelectrically converting the light diffracted by the hologram element and a signal operation unit for generating a focus error signal and/or a track error signal from a signal detected from the photodetector. The optical pickup device can implement a stable servo operation even at deviations of the photodetector, a change in the wavelength of light emitted from the light source, and/or shift of focusing means such as an objective lens, and can record and/or reproduce high-density information on/from the recording medium.

    Abstract translation: 一种采用信号检测单元的光学拾取装置，包括具有多个图案区域的全息元件，用于衍射和/或聚焦从记录介质反射和入射的光;具有多个光接收区域的光电检测器，用于接收和光电转换光 由全息元件衍射，以及用于从从光电检测器检测的信号产生聚焦误差信号和/或轨道误差信号的信号操作单元。 光拾取装置即使在光电检测器的偏差，光源发射的光的波长变化和/或诸如物镜的聚焦装置的移动中也能够实现稳定的伺服操作，并且可以记录和/或再现 来自记录介质的高密度信息。

    Fast responding optical modulator
    5.
    发明授权
    Fast responding optical modulator 失效
    快速响应光调制器

    公开(公告)号：US06243216B1

    公开(公告)日：2001-06-05

    申请号：US08508250

    申请日：1995-07-27

    Applicant: Jang-hoon Yoo ,  Pyong-yong Seong

    Inventor： Jang-hoon Yoo ,  Pyong-yong Seong

    IPC: G02B904

    CPC classification number: G11B7/128 ,  G02F1/0102 ,  G02F1/0311 ,  G02F1/11

    Abstract: A fast responding optical modulating device for a high-density recording using in an optical pickup includes a light source, an optical modulator and a pair of lenses. The pair of lenses are so arranged that the distance between the lenses is shorter than the sum of each focal length of the lenses. The device can adjust an optical spot size at the center of the optical modulator by changing the position of the lenses without altering the whole length between the light source and optical modulator. Therefore, the device can increase the rise time as desired and the optical efficiency in optical modulation for high-density recording which uses a short wavelength light source, and moreover, has an effect of simplifying the high-density recording.

    Abstract translation: 用于在光学拾取器中使用的高密度记录的快速响应光学调制装置包括光源，光学调制器和一对透镜。 这对透镜被布置成使得透镜之间的距离比透镜的每个焦距的总和短。 该装置可以通过改变透镜的位置而不改变光源和光调制器之间的整个长度来调节光调制器中心处的光点尺寸。 因此，该装置可以根据需要增加上升时间和使用短波长光源的高密度记录的光学调制中的光学效率，此外，具有简化高密度记录的效果。

    Semiconductor laser and flying optical pickup for recording/reproducing using the same
    7.
    发明授权
    Semiconductor laser and flying optical pickup for recording/reproducing using the same 失效
    半导体激光器和飞行光学拾取器，用于使用其进行记录/再现

    公开(公告)号：US06480222B1

    公开(公告)日：2002-11-12

    申请号：US08445509

    申请日：1995-05-22

    Applicant: Chul-woo Lee ,  Jang-hoon Yoo ,  Pyong-yong Seong

    Inventor： Chul-woo Lee ,  Jang-hoon Yoo ,  Pyong-yong Seong

    IPC: B41J2700

    CPC classification number: B82Y10/00 ,  G11B7/122

    Abstract: A semiconductor laser for generating a laser beam and an optical pickup for recording/reproducing information using the semiconductor laser as an optical source are provided. The semiconductor laser includes an aperture member on an emitting end thereof to perform high-density memory recording/reproducing through the reduction of an optical spot. The aperture has a hole whose diameter is smaller than the width of the active region of the semiconductor laser, to thereby restrictively emit the laser beam via the hole so that the optical spot formed on an optical disk is reduced. Thus, high-density memory recording/reproducing, which is useful for miniaturized information processors, can be realized.

    Abstract translation: 提供了一种用于产生激光束的半导体激光器和用于使用半导体激光器作为光源来记录/再现信息的光学拾取器。 半导体激光器包括在其发射端上的孔径构件，以通过减少光点来执行高密度存储器记录/再现。 孔具有直径小于半导体激光器的有源区的宽度的孔，从而通过孔限制性地发射激光束，使得形成在光盘上的光点减小。 因此，可以实现对小型化信息处理器有用的高密度存储器记录/再现。

    Magnetic circuit, optical pickup actuator, optical recording and/or reproducing apparatus, and methods therefor
    10.
    发明授权
    Magnetic circuit, optical pickup actuator, optical recording and/or reproducing apparatus, and methods therefor 失效
    磁路，光学拾取器致动器，光学记录和/或再现装置及其方法

    公开(公告)号：US07631322B2

    公开(公告)日：2009-12-08

    申请号：US11043453

    申请日：2005-01-27

    Applicant: Hyung-joo Kang ,  Byung-youn Song ,  Pyong-yong Seong ,  Dae-jong Jang

    Inventor： Hyung-joo Kang ,  Byung-youn Song ,  Pyong-yong Seong ,  Dae-jong Jang

    IPC: G11B7/00

    CPC classification number: G11B7/0935 ,  G11B7/093 ,  G11B7/0933 ,  G11B7/0956

    Abstract: A magnetic circuit, an optical pickup actuator, an optical recording and/or reproducing apparatus using the magnetic circuit, and method of the same, wherein the magnetic circuit includes a plurality of focus coil units each of which includes a first focus coil and a second focus coil, and a magnet including a plurality of magnet portions which interact with the plurality of focus coil units and each of which is polarized in a direction opposite to adjacent magnet portions thereamong. Here, electromagnetic forces act on the first and second focus coils in each focus coil unit in a same direction in response to focus driving signals and in opposite directions in response to tilt driving signals, with the first and second focus coils in each focus coil unit have different effective coil lengths.

    Abstract translation: 磁路，光拾取器致动器，使用磁路的光学记录和/或再现装置及其方法，其中磁路包括多个聚焦线圈单元，每个聚焦线圈单元包括第一聚焦线圈和第二聚焦线圈 聚焦线圈和包括与多个聚焦线圈单元相互作用的多个磁体部分的磁体，并且每个磁体在与其相邻的磁体部分相反的方向上被极化。 这里，响应于倾斜驱动信号，响应于聚焦驱动信号和相反方向，电磁力以相同的方向在每个聚焦线圈单元中的第一和第二聚焦线圈上作用，第一和第二聚焦线圈在每个聚焦线圈单元 具有不同的有效线圈长度。

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