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    Reproducing and recording optical pickup compatible with discs having different thicknesses
    5.
    发明授权
    Reproducing and recording optical pickup compatible with discs having different thicknesses 失效
    复制和记录与不同厚度的光盘兼容的光学拾取器

    公开(公告)号：US5777973A

    公开(公告)日：1998-07-07

    申请号：US761826

    申请日：1996-12-06

    申请人： Jang-hoon Yoo ,  Chong-sam Chung ,  Chul-woo Lee ,  Kyung-hwa Rim ,  Kun-ho Cho

    发明人： Jang-hoon Yoo ,  Chong-sam Chung ,  Chul-woo Lee ,  Kyung-hwa Rim ,  Kun-ho Cho

    IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/08 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135

    CPC分类号： G11B7/1353 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1367 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B2007/13727 ,  G11B7/0037 ,  G11B7/0909

    摘要： A reproducing/recording optical pickup compatible with discs having different thicknesses includes a transparent plate having a central portion formed with a diffraction grating pattern for diffracting the light travelling from the light source to the objective lens, and a transparent portion through which the light passes, and a photodetector having first and second light receiving portions. The zero-order transmitted light and the passing light are focused using all regions of the aperture of the objective lens with respect to a thin disc. The positive first-order diffracted light diffracted by the diffraction grating pattern of the transparent plate is focused onto a thick disc by partial regions of the objective lens. Then, the reflected lights thereof are detected by the first and second light receiving portions, respectively. Because signals for reproduction and servo for each disc are detected as the detection signals of the first and second light receiving portions, stable servo and noiseless reproduction are possible, irrespective of the thickness of the disc used.

    摘要翻译： 与具有不同厚度的光盘兼容的再现/记录光学拾取器包括透明板，其具有形成有衍射光栅图案的中心部分，用于将从光源传播的光衍射到物镜，以及光通过的透明部分， 以及具有第一和第二光接收部分的光电检测器。 使用物镜的孔径的相对于薄盘的所有区域聚焦零级透射光和通过光。 由透明板的衍射光栅图案衍射的正一级衍射光被物镜的部分区域聚焦在厚盘上。 然后，其反射光分别由第一和第二光接收部分检测。 由于每个盘的再现和伺服信号被检测为第一和第二光接收部分的检测信号，所以与所使用的盘的厚度无关，可以进行稳定的伺服和无噪声再现。

    Optical detector with two detecting regions for reproducing and recording information on two kinds of disks having different thicknesses
    6.
    发明授权
    Optical detector with two detecting regions for reproducing and recording information on two kinds of disks having different thicknesses 失效
    具有两个检测区域的光学检测器，用于在具有不同厚度的两种盘上再现和记录信息

    公开(公告)号：US5802037A

    公开(公告)日：1998-09-01

    申请号：US708988

    申请日：1996-09-06

    申请人： Chul-woo Lee ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Jang-hoon Yoo ,  Soo-yeul Jung

    发明人： Chul-woo Lee ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Jang-hoon Yoo ,  Soo-yeul Jung

    IPC分类号： G11B7/08 ,  G11B7/00 ,  G11B7/09 ,  G11B7/13

    CPC分类号： G11B7/131 ,  G11B7/0909 ,  G11B7/133 ,  G11B2007/0006

    摘要： An optical pickup device which is capable of reproducing and recording information from/onto at least two kinds of discs having different thicknesses includes a light source, an objective lens provided along the light path from the light source facing the plane of a disc and having a predetermined effective diameter, a beam splitter provided between the objective lens and the light source, and a photodetector for detecting the beam split from the light splitter and reflected from the disc, wherein the photodetector has a first detection region and a second detection region provided in the peripheral portion of the first detection region. The optical pickup device is simplified and the manufacturing cost therefor is low. Also, by reducing the spherical aberration effect for the light, discs having different thicknesses can be used for a single disc drive.

    摘要翻译： 能够从具有不同厚度的至少两种光盘再现和记录信息的光学拾取装置包括：光源，沿着从光源面向光盘面的光路设置的物镜，具有 设置在所述物镜和所述光源之间的分束器，以及用于检测从所述分光器分离并从所述光盘反射的光束的光电检测器，其中所述光电检测器具有第一检测区域和设置在所述光源中的第二检测区域 第一检测区域的周边部分。 光拾取装置简化，制造成本低。 此外，通过减小光的球面像差效应，可以将具有不同厚度的盘用于单个盘驱动器。

    Objective lens for high-density optical focusing, and optical pickup using the same
    7.
    发明授权
    Objective lens for high-density optical focusing, and optical pickup using the same 失效
    用于高密度光学聚焦的物镜，以及使用其的光学拾取器

    公开(公告)号：US06430139B1

    公开(公告)日：2002-08-06

    申请号：US09671710

    申请日：2000-09-28

    申请人： Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Chong-sam Chung ,  Dong-ho Shin

    发明人： Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Chong-sam Chung ,  Dong-ho Shin

    IPC分类号： G11B712

    CPC分类号： G11B7/13922 ,  G11B7/1374 ,  G11B2007/0006

    摘要： A high-density focusing objective lens having a high numerical aperture (NA), which can be easily manufactured by an existing technique, and an optical pickup using the objective lens for high-density recording. The objective lens includes a first transmitting portion placed at a relatively near-axis region from the optical axis to divergently transmit an incident light beam; a first reflecting portion to divergently reflect the incident light beam, the first reflecting portion faces the first transmitting portion; a second reflecting portion, formed at a relatively far-axis region around the first transmitting portion that focuses and reflects the light reflected from the first reflecting portion; and a second transmitting portion, formed at a relatively far-axis region around the first reflecting portion, that refracts and transmits the light beam focused by the second reflecting portion as a peripheral light beam, wherein the maximum angle &agr; between the optical axis and the peripheral light beam satisfies the condition of 30° ≦&agr;≦65°. The optical pickup further includes the previously mentioned objective lens as a second objective lens, which is optionally placed into the optical path between a first objective lens and an optical medium. As a result, the NA of the objective lens unit can be increased up to 0.85 while the working distance d2 is maintained to be 0.2 mm.

    摘要翻译： 具有可以容易地通过现有技术制造的具有高数值孔径（NA）的高密度聚焦物镜和使用该物镜进行高密度记录的光学拾取器。 物镜包括放置在与光轴相对靠近轴的区域的第一透射部分，以发散入射光束; 第一反射部分，其分散地反射入射光束，第一反射部分面向第一透射部分; 第二反射部，形成在第一透射部周围的相对远轴的区域，聚焦并反射从第一反射部反射的光; 以及第二透射部，形成在所述第一反射部周围的相对远轴的区域，所述第二透射部折射并透射由所述第二反射部聚焦的光束作为周边光束，其中，所述光轴与所述第二反射部之间的最大角度α 周边光束满足30°<=α<= 65°的条件。 光拾取器还包括作为第二物镜的前述物镜，其可选地放置在第一物镜和光介质之间的光路中。 结果，物镜单元的NA可以增加到0.85，而工作距离d2保持为0.2mm。

    Optical pickup device
    8.
    发明授权
    Optical pickup device 失效
    光学拾取装置

    公开(公告)号：US6114689A

    公开(公告)日：2000-09-05

    申请号：US299664

    申请日：1999-04-27

    申请人： Kun-ho Cho ,  Jang-hoon Yoo ,  Yong-hoon Lee ,  Chul-woo Lee ,  Chong-sam Chung

    发明人： Kun-ho Cho ,  Jang-hoon Yoo ,  Yong-hoon Lee ,  Chul-woo Lee ,  Chong-sam Chung

    IPC分类号： G02B3/08 ,  G02B5/18 ,  G02B13/00 ,  G11B7/1374 ,  G02B3/00 ,  G11B7/12

    CPC分类号： G11B7/1353 ,  G02B3/08 ,  G02B5/1876 ,  G11B7/122 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/1384 ,  G11B7/1387

    摘要： An optical pickup device includes a light module, emitting light and receiving light reflected from a recording medium, and a solid immersion lens (SIL) member disposed in an optical path between the light module and the recording medium. The SIL has a planar surface facing the recording medium and a plurality of elliptically curved surfaces opposite the recording medium. The elliptically curved surfaces have different radii of curvature arranged symmetrical with respect to a central axis for focusing the incident light to form a tight beam spot on a recording plane of the recording medium.

    摘要翻译： 一种光学拾取装置，包括发光和接收从记录介质反射的光的光模块和设置在光模块和记录介质之间的光路中的固体浸没透镜（SIL）部件。 SIL具有面向记录介质的平面和与记录介质相对的多个椭圆曲面。 椭圆曲面具有相对于中心轴对称布置的不同的曲率半径，用于聚焦入射光以在记录介质的记录平面上形成紧束光斑。

    Optical pickup having plural optical sources and plural optical detectors
    9.
    发明授权
    Optical pickup having plural optical sources and plural optical detectors 失效
    具有多个光源和多个光检测器的光学拾取器

    公开(公告)号：US5933401A

    公开(公告)日：1999-08-03

    申请号：US869754

    申请日：1997-06-05

    申请人： Chul-woo Lee ,  Dong-ho Shin ,  Chong-sam Chung ,  Pyeong-yong Seong ,  Kun-ho Cho ,  Hyun-seob Choi ,  Yong-hoon Lee ,  Tae-kyoung Kim ,  No-kyong Park

    发明人： Chul-woo Lee ,  Dong-ho Shin ,  Chong-sam Chung ,  Pyeong-yong Seong ,  Kun-ho Cho ,  Hyun-seob Choi ,  Yong-hoon Lee ,  Tae-kyoung Kim ,  No-kyong Park

    IPC分类号： G11B7/00 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135

    CPC分类号： G11B7/1356 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1395 ,  G11B2007/0006

    摘要： An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from the first optical source, an objective lens for focusing light emitted from the respective first and second optical sources on a recording medium placed in the optical player, a light path changing unit disposed on a light path between the first and second optical sources and the objective lens for changing the traveling path of incident light, a first optical detector for receiving light emitted from the first optical source and is incident via the recording medium and the light path changing unit, and a second optical detector for receiving light emitted from the second optical source and is incident via the recording medium and the light path changing unit.

    摘要翻译： 能够兼容地采用放置在光学播放器中的不同格式的光盘的光学拾取器包括：用于发射具有预定波长的光的第一光源;用于发射波长与第一光发射光的波长不同的光的第二光源; 光源，用于将从相应的第一和第二光源发射的光聚焦在放置在光学播放器中的记录介质上的物镜;设置在第一和第二光源与物镜之间的光路上的光路改变单元， 改变入射光的行进路径，第一光学检测器，用于接收从第一光源发射的光，并经由记录介质和光路改变单元入射;以及第二光学检测器，用于接收从第二光源发射的光;以及 经由记录介质和光路改变单元入射。

    Focus error detection with two symmetrically splitted reflected beams
    10.
    发明授权
    Focus error detection with two symmetrically splitted reflected beams 失效
    使用两个对称分裂的反射光束进行聚焦误差检测

    公开(公告)号：US5594714A

    公开(公告)日：1997-01-14

    申请号：US366255

    申请日：1994-12-29

    申请人： Chul-woo Lee ,  Kyung-hwa Rim ,  Pyong-yong Seong ,  Chong-sam Chung

    发明人： Chul-woo Lee ,  Kyung-hwa Rim ,  Pyong-yong Seong ,  Chong-sam Chung

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

    CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/0943

    摘要： In an optical pickup, a focus error detector for detecting a focus error of an objective lens for an optical disk includes a focusing lens for focusing the reflected light of the optical disk, a diffraction optical device for diffracting the reflected light focused by the focusing lens into two light rays, two bi-segmented photo-detectors for receiving the two split light rays, respectively, and a circuit for outputting a desired focus error signal from the signal detected from the photo-detectors. The circuit outputs a pure focus error signal without errors created by the deviation of the light amount in the photo-detectors due to the tilt or shift of the reflected light, thereby contributing to the stable operation and miniaturization of the optical pickup.

    摘要翻译： 在光拾取器中，用于检测光盘的物镜的聚焦误差的聚焦误差检测器包括：用于聚焦光盘的反射光的聚焦透镜;用于衍射由聚焦透镜聚焦的反射光的衍射光学装置 分别用于接收两个分开的光线的两个双段光电检测器和用于从从光电检测器检测的信号中输出所需的聚焦误差信号的电路。 由于反射光的倾斜或偏移，电路输出纯聚焦误差信号，而不会由于光检测器中光量的偏差而产生误差，从而有助于光拾取器的稳定操作和小型化。