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    Optical pickup apparatus capable of detecting and compensating for spherical aberration caused by thickness variation of recording layer
    3.
    发明公开
    Optical pickup apparatus capable of detecting and compensating for spherical aberration caused by thickness variation of recording layer 审中-公开
    用于检测和修正球面像差由于厚度的记录层中的变化的光学拾取装置的功能

    公开(公告)号：EP1755116A3

    公开(公告)日：2007-11-14

    申请号：EP06118714.2

    申请日：2006-08-10

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Hong, Tao ,  Kim, Tae-kyung ,  Choi, Woo-seok ,  Chung, Chong-sam

    IPC分类号： G11B7/135 ,  G11B7/13

    CPC分类号： G11B7/1353 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/13927

    摘要： An optical pickup apparatus, including a light source (11) to emit light, an objective lens (16) to form a light spot on an optical recording medium by focusing the light emitted from the light source, an optical division unit (13), disposed between the light source and the objective lens, to divide the light emitted from the light source into a main beam and two subbeams to form one main spot and two subspots on the optical recording medium, the optical division unit having a first area and a second area surrounding the first area, a detector (20) to detect the amount of light of the main beam and the amount of light of the respective subbeams reflected from the optical recording medium, a beam splitter (14) disposed between the light source and the objective lens to allow the light reflected from the optical recording medium to be directed to the detector, signal generating circuits to generate a tracking error signal (TES), a focusing error signal (FES), and a spherical aberration signal (SAS), respectively, in response to the output of the detector, and a spherical aberration compensation unit (15), disposed between the objective lens and the beam splitter, to compensate for spherical aberration using the SAS generated by the signal generating circuits.

    Optical pickup, optical recording and/or reproducing apparatus using the same, and method for detecting tracking error signal
    4.
    发明公开
    Optical pickup, optical recording and/or reproducing apparatus using the same, and method for detecting tracking error signal 审中-公开
    光学读取头，光学记录和/或重放装置，以便和方法，用于检测跟踪误差信号

    公开(公告)号：EP1708184A3

    公开(公告)日：2007-05-02

    申请号：EP06111972.3

    申请日：2006-03-30

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Choi, Woo-seok ,  Kim, Tae-kyung ,  Chung, Chong-sam

    IPC分类号： G11B7/09

    CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0912

    摘要： An optical pickup and an optical recording and/or reproducing apparatus employing the optical pickup, wherein the optical pickup includes: a light source (11); an objective lens (17) to collect and focus an incident beam on an information storage medium (10); a holographic grating (13) to split light emitted by the light source (11) into a main beam and first and second sub-beams by diffraction and to provide, or create, a continuously changing wavefront in the first and second sub-beams to reduce the amplitude of an AC component of a sub-push-pull (SPP) signal of the first and second sub-beams; and a photodetector (19) to receive the main beam and the first and second sub-beams that are focused on and reflected from the information storage medium (10) and to obtain a main push-pull (MPP) signal of the main beam and a SPP signal of the first and second sub-beams.

    Optical pickup, optical recording and/or reproducing apparatus using the same, and method for detecting tracking error signal
    5.
    发明公开
    Optical pickup, optical recording and/or reproducing apparatus using the same, and method for detecting tracking error signal 审中-公开
    光学读取头，光学记录和/或重放装置，以便和方法，用于检测跟踪误差信号

    公开(公告)号：EP1708184A2

    公开(公告)日：2006-10-04

    申请号：EP06111972.3

    申请日：2006-03-30

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Choi, Woo-seok ,  Kim, Tae-kyung ,  Chung, Chong-sam

    IPC分类号： G11B7/09

    CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0912

    摘要： An optical pickup and an optical recording and/or reproducing apparatus employing the optical pickup, wherein the optical pickup includes: a light source (11); an objective lens (17) to collect and focus an incident beam on an information storage medium (10); a holographic grating (13) to split light emitted by the light source (11) into a main beam and first and second sub-beams by diffraction and to provide, or create, a continuously changing wavefront in the first and second sub-beams to reduce the amplitude of an AC component of a sub-push-pull (SPP) signal of the first and second sub-beams; and a photodetector (19) to receive the main beam and the first and second sub-beams that are focused on and reflected from the information storage medium (10) and to obtain a main push-pull (MPP) signal of the main beam and a SPP signal of the first and second sub-beams.

    摘要翻译： 一种光学拾取器和光记录和/或再现设备，它采用的光拾取，worin光学拾取器包括：光源（11）; 至物镜（17），以收集和入射光束的聚焦到信息存储介质上（10）; 的全息光栅（13），通过衍射来分割由所述光源（11）发射到一个主光束和第一和第二子光束的光，并提供，或在第一和第二子光束，以创建，连续变化的波阵面 第一和第二子光束的减少的子推 - 拉的交流分量的幅度（SPP）信号; 和光检测器（19），以接收主光束和所述第一和第二子光束没有被聚焦并反射从信息存储介质（10），并获得主光束的主推挽（MPP）信号和 第一和第二子光束的一个SPP信号。

    Optical pickup and optical recording and/or reproducing apparatus adopting the same
    6.
    发明公开
    Optical pickup and optical recording and/or reproducing apparatus adopting the same 有权
    光拾取装置和用于使用相同的光学记录和/或重放装置

    公开(公告)号：EP1615213A1

    公开(公告)日：2006-01-11

    申请号：EP05254172.9

    申请日：2005-07-02

    申请人： Samsung Electronics Co, Ltd

    发明人： Kim, Tae-kyung ,  Kim, Seok-jung, c/o 107-1502 Ssangyong Apt. ,  Kim, Hee-kyung, c/o 105-1205 Samsung Raemian Apt. ,  Choi, Woo-seok

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1369 ,  G11B7/1374 ,  G11B2007/0006

    摘要： An optical pickup and an optical recording and/or reproducing apparatus adopting the same are provided. The optical pickup includes an optical unit (10), first and second objective lenses (60, 70), and an optical path switching unit (50, 150, 250). The optical unit illuminates light onto an information storage medium (1) and receives light reflected from the information storage medium (1) to detect an information signal and/or an error signal. The first and the second objective lenses (60, 70) focus incident light to form a light spot on an information storage surface of the information storage medium (1). The optical path switching unit (50, 150, 250) selectively directs the light incident from the optical unit to one of the first and second objective lenses (60, 70). In the optical pickup, since the light quantity directed to a plurality of objective lenses may be maximized, optical efficiency is increased and thus high-speed operation may be attained.

    摘要翻译： 本发明提供一种光学拾取器和光记录和/或再现装置采用相同的。 所述光学拾取器包括光学在单元（10），第一和第二物镜（60,70），并以光路切换单元（50，150，250）。 该光学单元将光照射到信息存储介质（1）上和接收从所述信息存储介质（1）反射到上和/或在误差信号检测信息信号。 第一和第二物镜（60,70）聚焦入射光在信息存储介质的信息存储表面的形成的光点（1）。 光路切换单元（50，150，250）有选择地ausrichtet光入射从光学单元到所述第一和第二物镜（60,70）中的一个。 在光学拾取器中，由于定向到物镜的多个光量可以被最大化，光效率增加，因此高速运算可以实现。

    Optical pickup
    9.
    发明公开
    Optical pickup 有权
    光学拾音器

    公开(公告)号：EP1117096A3

    公开(公告)日：2002-07-03

    申请号：EP00307764.1

    申请日：2000-09-08

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Kim, Tae-kyung ,  Chung, Chong-sam ,  Ahn, Young-man ,  Seo, Hae-jung

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1374 ,  G11B7/0037 ,  G11B7/1275 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： An optical pickup including: first and second light sources (601; 701) for generating laser beams having different wavelengths, corresponding to first and second media (100) having different thicknesses, respectively; an objective lens (200) having diverging and focusing portions, for focusing the laser beams from the first and second light sources (601; 701) onto the first and second media (100), respectively; at least one photodetector (602; 702) for receiving the laser beams which are emitted from the first and second light sources (601; 701) and reflected, respectively, by the first and second media (100); and a collimating lens (400) arranged on the optical path between the objective lens (200), and the first and second light sources (601; 701). The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which need a blue light source near 405 nm and an objective lens having a numerical aperture of 0.6 or more.

    摘要翻译： 一种光学拾取器，包括：分别对应于具有不同厚度的第一和第二介质（100）的用于产生具有不同波长的激光束的第一和第二光源（601; 701）; 一个具有发散和聚焦部分的物镜，用于将来自第一和第二光源的激光束分别聚焦到第一和第二介质上; 至少一个光电探测器，用于接收从第一和第二光源分别发射并由第一和第二介质反射的激光束; 和布置在物镜（200）与第一和第二光源（601; 701）之间的光路上的准直透镜（400）。 该光学头兼容现有的数字多功能盘（DVD）和需要405nm附近的蓝色光源的高分辨率（HD）-DVD以及数值孔径为0.6或更大的物镜。

    Aberration correction element and optical pickup adopting the same
    10.
    发明公开
    Aberration correction element and optical pickup adopting the same 有权
    OptischesAbtastgerätausgerüstetmit KorrekturelementfürAberration

    公开(公告)号：EP1184856A2

    公开(公告)日：2002-03-06

    申请号：EP01302937.6

    申请日：2001-03-29

    申请人： SAMSUNG ELECTRONICS Co. Ltd.

    发明人： Kim, Tae-kyung ,  Ahn, Young-man ,  Chung, Chong-sam ,  Suh, Hea-jung

    IPC分类号： G11B7/135 ,  G02B5/00

    CPC分类号： G11B7/1275 ,  G02B5/3083 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

    摘要： An aberration correction element (130) having first and second retardation members (31,35) whose refractive indices are different for a predetermined polarized light beam, so that the first and second retardation members causes a phase difference of an incoming light beam according to the polarization of the incoming light beam, and an optical pickup adopting the aberration correction element are provided. When the aberration correction element is designed such that a phase difference caused by the aberration correction element (130) with respect to a wavelength variation of incoming light beam (101a) increases or decreases with increasing distance from the optical axis, and then adopted in an optical pickup for high-density recording and reproduction with a shorter wavelength light beam, chromatic aberration caused by a slight wavelength variation between record and reproduction modes can be corrected with high light efficiency. The aberration correction element selectively causes a phase difference of incoming light beam according to the polarization of the incoming light beam, and thus it can be adopted in an optical pickup compatible for high-density and low-density recording media (100) using two polarized light beams (101,102) perpendicular to each other.

    摘要翻译： 一种具有对于预定的偏振光束的折射率不同的第一和第二延迟构件（31,35）的像差校正元件（130），使得第一和第二延迟构件根据入射光束的入射光束的相位差 提供入射光束的偏振和采用像差校正元件的光学拾取器。 当像差校正元件被设计成使得由像差校正元件（130）引起的相对于入射光束（101a）的波长变化的相位差随着距离光轴的距离的增加而增加或减小，然后被采用 用于具有较短波长光束的高密度记录和再现的光学拾取器，可以以高光效率校正由记录和再现模式之间的轻微波长变化引起的色差。 像差校正元件根据入射光束的偏振选择性地引入入射光束的相位差，因此可以采用与使用两个偏振光的高密度和低密度记录介质（100）兼容的光学拾取器 彼此垂直的光束（101,102）。