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    Inverse image generating method apparatus thereof and focus error detecting method using the same and apparatus thereof
    3.
    发明授权
    Inverse image generating method apparatus thereof and focus error detecting method using the same and apparatus thereof 失效
    其反像图像生成方法装置和使用其的聚焦误差检测方法及其装置

    公开(公告)号：US5699339A

    公开(公告)日：1997-12-16

    申请号：US508253

    申请日：1995-07-27

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

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

    IPC分类号： G11B7/08 ,  G11B7/09 ,  G11B7/135 ,  G11B7/00

    CPC分类号： G11B7/1356 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B2007/0919

    摘要： In detecting a focus error for an optical pickup, an inverse image generator for generating inverse images onto a light beam reflected from an optical disk is used in a focus error detecting method and apparatus thereof. The inverse image generator is composed of a semi-transmissive plane for splitting a light beam into first and second light beams, first and second prisms for inverting the phase of the second light beam, and third and fourth prisms for synthesizing the phase-inverted second light beam with the first light beam. Also, the inverse image generator has two quadrant wave plates, a polarization plane and light synthesizing plane for preventing a light loss. Since the errors due to an optical axis variation is eliminated from the focus error signal detected from the synthetic light beam radiated by the inverse generator, the optical pickup can be driven with stability.

    摘要翻译： 在检测光拾取器的聚焦误差时，在聚焦误差检测方法及其装置中使用用于在从光盘反射的光束上产生反转图像的逆图像发生器。 逆图像生成器由用于将光束分割为第一和第二光束的半透射平面，用于反转第二光束的相位的第一和第二棱镜以及用于合成相位反转的第二棱镜的第三和第四棱镜 光束与第一光束。 此外，逆图像生成器具有两个象限波片，一个用于防止光损失的偏振面和光合成平面。 由于从由逆发生器辐射的合成光束检测到的聚焦误差信号中消除了由于光轴变化引起的误差，所以可以稳定地驱动光学拾取器。

    Optical pickup for optical disk having multiple recording layers
    5.
    发明授权
    Optical pickup for optical disk having multiple recording layers 失效
    具有多个记录层的光盘的光学拾取器

    公开(公告)号：US5526336A

    公开(公告)日：1996-06-11

    申请号：US458164

    申请日：1995-06-02

    申请人： Tai-suk Park ,  Chul-woo Lee ,  Kyung-hwa Rim

    发明人： Tai-suk Park ,  Chul-woo Lee ,  Kyung-hwa Rim

    IPC分类号： G11B7/08 ,  G11B7/00 ,  G11B7/09 ,  G11B7/135

    CPC分类号： G11B7/0927 ,  G11B7/0908 ,  G11B2007/0013

    摘要： An optical pickup for all optical disk having multiple recording layers is provided to exactly control a focal position according to the thickness of optical disk, by separately controlling focal positions on each recording layer, wherein a Fresnel lens for diffracting an optical beam generated from an optical source and an objective lens for focusing the diffracted beam are separately located, and focus driving coils are included for separately driving the Fresnel lens and objective lens by using a signal detected by an optical detector. As the interval between the Fresnel lens and objective lens is varied, the interval between focal points formed on each recording layer is also varied. Thus, the focal positions formed on each recording layer can be exactly controlled according to the thickness of optical disk. Therefore, information can be clearly reproduced without interference by simultaneously scanning each recording layer while exactly controlling the focal positions.

    摘要翻译： 提供具有多个记录层的所有光盘的光学拾取器，通过分别控制每个记录层上的焦点位置来精确地控制根据光盘厚度的焦点位置，其中用于衍射由光学产生的光束的菲涅尔透镜 光源和用于聚焦衍射光束的物镜分别定位，并且包括聚焦驱动线圈，用于通过使用由光学检测器检测的信号分别驱动菲涅尔透镜和物镜。 随着菲涅尔透镜和物镜之间的间隔变化，形成在每个记录层上的焦点之间的间隔也变化。 因此，可以根据光盘的厚度精确地控制在每个记录层上形成的焦点位置。 因此，通过在精确控制焦点位置的同时扫描每个记录层，可以清楚地再现信息而不受干扰。

    Optical pickup device
    6.
    发明授权
    Optical pickup device 失效
    光学拾取装置

    公开(公告)号：US5907530A

    公开(公告)日：1999-05-25

    申请号：US708200

    申请日：1996-09-06

    申请人： Kun-ho Cho ,  Eung-ho Kim ,  Jang-hoon Yoo ,  Kyung-hwa Rim

    发明人： Kun-ho Cho ,  Eung-ho Kim ,  Jang-hoon Yoo ,  Kyung-hwa Rim

    IPC分类号： G02B3/10 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

    CPC分类号： G02B3/10 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B7/0037

    摘要： An optical pickup device which is capable of reproducing and recording information from at least two 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, a photodetector for detecting the beam split from the light splitter and reflected from the disc, and light controller provided along the light path facing the photodetector lens for controlling the light of the intermediate region between near- and far axis regions of an incident light beam. 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 in a single disc drive.

    摘要翻译： 能够从具有不同厚度的至少两个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的光源的光路设置并具有预定有效直径的物镜， 设置在物镜和光源之间的分束器，用于检测从分光器分离并从盘反射的光束的光电检测器，以及沿着面向光电检测器透镜的光路设置的光控制器，用于控制中间区域的光 在入射光束的近轴和远轴区域之间。 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，可以在单个盘驱动器中使用具有不同厚度的盘。

    Optical pickup device having a diaphram with a predetermined aperture
    8.
    发明授权
    Optical pickup device having a diaphram with a predetermined aperture 失效
    具有具有预定孔径的光阑的光学拾取装置

    公开(公告)号：US5986993A

    公开(公告)日：1999-11-16

    申请号：US779520

    申请日：1997-01-07

    申请人： Jang-hoon Yoo ,  Chul-woo Lee ,  Kyung-hwa Rim

    发明人： Jang-hoon Yoo ,  Chul-woo Lee ,  Kyung-hwa Rim

    IPC分类号： G02B13/00 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

    CPC分类号： G11B7/1374 ,  G11B7/139 ,  G11B2007/0006

    摘要： An optical pickup device which can obtain a stable reproduction signal by increasing the numerical aperture of an objective lens includes an objective lens facing a disc, a light source for radiating light to the disc via the objective lens, a beam splitter provided between the light source and objective lens for directing the light reflected from the disc in a path different from that of the light travelled from the light source, a photodetector for detecting the light reflected from the disc and travelled via the beam splitter, and a diaphragm provided between the beam splitter and light source and having a predetermined numerical aperture.

    摘要翻译： 通过增加物镜的数值孔径可获得稳定的再现信号的光拾取装置包括面对盘的物镜，用于经由物镜将光照射到盘的光源，设置在光源之间的分束器 以及物镜，用于将光从盘反射的光线导向与从光源行进的光不同的路径;光电检测器，用于检测从盘反射并经由分束器行进的光，以及设置在光束之间的光阑 分光器和光源并具有预定的数值孔径。

    Method and apparatus for high-density reproduction
    9.
    发明授权
    Method and apparatus for high-density reproduction 失效
    用于高密度再现的方法和装置

    公开(公告)号：US5706263A

    公开(公告)日：1998-01-06

    申请号：US364984

    申请日：1994-12-28

    申请人： Chul-woo Lee ,  Kyung-hwa Rim

    发明人： Chul-woo Lee ,  Kyung-hwa Rim

    IPC分类号： G01M11/00 ,  G06F3/08 ,  G11B7/00 ,  G11B7/005 ,  G11B7/13 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105

    CPC分类号： B82Y10/00 ,  G11B7/133 ,  G11B11/10543 ,  G11B7/005

    摘要： A method and apparatus for high-density reproduction of information recorded on an optical disk by increasing the optical resolution during reproduction. The apparatus focuses an optical beam reflected from the optical disk using a lens, and receives the focused reflected optical beam using a photodetector having an optical area whose width is smaller than the diameter of an optical spot formed thereon. As a result, jitter caused by interfering light, that is, light reflected from the circumference such as a recording portion adjacent to the optical disk, can be solved. Also, high-density reproduction can be performed by increasing the optical resolution during reproduction. The apparatus can be applied to an optical pickup for high-density recording.

    摘要翻译： 一种用于通过增加再现期间的光学分辨率来高精度地再现记录在光盘上的信息的方法和装置。 该装置使用透镜对从光盘反射的光束进行聚焦，并且使用具有宽度小于形成在其上的光点的直径的光学区域的光电检测器来接收聚焦的反射光束。 结果，可以解决由干扰光引起的抖动，即，诸如与光盘相邻的记录部分等圆周反射的光。 此外，可以通过增加再现期间的光学分辨率来执行高密度再现。 该装置可以应用于用于高密度记录的光学拾取器。

    Reproducing and recording optical pickup compatible with discs having different thicknesses
    10.
    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。