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    Objective lens for high-density optical focusing and an optical disk in an optical pickup
    33.
    发明授权
    Objective lens for high-density optical focusing and an optical disk in an optical pickup 失效
    用于高密度光学聚焦的物镜和光学拾取器中的光盘

    公开(公告)号：US06938890B2

    公开(公告)日：2005-09-06

    申请号：US09725879

    申请日：2000-11-30

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

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

    IPC分类号： G02B13/00 ,  G02B3/08 ,  G02B13/18 ,  G11B7/085 ,  G11B7/09 ,  G11B7/095 ,  G11B7/135 ,  G11B7/24 ,  G11B7/00

    CPC分类号： G11B7/13927 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/13725

    摘要： An optical pickup includes a light source emitting a laser beam and an optical path changing unit altering a traveling path of an incident beam. An objective lens, disposed on an optical path between the optical path changing unit and an optical disk, focuses the incident beam from the light source to form a light spot on the optical disk of the objective lens. The optical pickup further includes a photodetector and an detecting-correcting unit, arranged on the optical path between the optical path changing unit and the objective lens, performing at least one of detecting the thickness of the optical disk and correcting aberration caused by thickness variations of the optical disk. The objective lens includes a first transmitting portion divergently transmitting an incident beam, where the first transmitting portion is at a relatively near-axis region from an optical axis of the objective lens. A second transmitting portion transmits the incident beam, where the second transmitting portion is arranged facing the first transmitting portion. A first reflecting portion condenses and reflects the incident beam from the first transmitting portion, where the first reflecting portion is formed around the second transmitting portion. A second reflecting portion condenses and reflects the incident beam from the first reflecting portion towards the second transmitting portion, where the second reflecting portion is formed around the first transmitting portion.

    摘要翻译： 光拾取器包括发射激光束的光源和改变入射光束的行进路径的光路改变单元。 设置在光路改变单元和光盘之间的光路上的物镜聚焦来自光源的入射光束，以在物镜的光盘上形成光斑。 光学拾取器还包括光电检测器和检测校正单元，其布置在光路改变单元和物镜之间的光路上，执行检测光盘的厚度和校正由厚度变化引起的像差中的至少一个 光盘。 物镜包括发射入射光束的第一透射部分，其中第一透射部分处于距离物镜的光轴的相对近轴的区域。 第二发送部分透射入射光束，其中第二透射部分布置成面对第一透射部分。 第一反射部分将来自第一透射部分的入射光束冷凝并反射，其中第一反射部分围绕第二透射部分形成。 第二反射部分将来自第一反射部分的入射光束聚集并反射到第二透射部分，其中第二反射部分围绕第一透射部分形成。

    Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure
    34.
    发明申请
    Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure 失效
    通过采用具有阶梯式衍射光栅结构的平板透镜，与可读写光盘兼容的数字通用光盘的光学记录和拾取头

    公开(公告)号：US20050018584A1

    公开(公告)日：2005-01-27

    申请号：US10869096

    申请日：2004-06-17

    申请人： Jang-Hoon Yoo ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong

    发明人： Jang-Hoon Yoo ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong

    IPC分类号： G02B5/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

    CPC分类号： G11B7/1353 ,  G02B5/1876 ,  G11B7/127 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a second optical source for emitting second light having a relatively long wavelength, a photo detector, an objective lens for focusing the light emitted from the first and second optical sources on the information recording surfaces of the optical discs, respectively, an optical path altering unit for transferring the light emitted from the first and second optical sources to the objective lens and transferring the first and second light reflected from the information recording surfaces of the plurality of discs to the photo detector, respectively, and a flat plate lens for substantially totally transmitting the first light proceeding from the optical path altering unit to the objective lens and diffracting the second light proceeding from the optical path altering unit to the optical axis of the objective lens.

    摘要翻译： 具有楼梯型衍射光栅结构的平板透镜的光学记录和拾取头与DVD和CD-RW兼容。 光学记录和拾取头包括用于发射具有较短波长的第一光的第一光源，用于发射具有较长波长的第二光的第二光源，光检测器，用于将从第一光发射的光聚焦的物镜 和第二光源分别设置在光盘的信息记录表面上，光路改变单元，用于将从第一和第二光源发射的光转移到物镜，并传送从信息记录表面反射的第一和第二光 以及平板透镜，用于将从光路改变单元前进的第一光基本上全部透射到物镜，并将从光路改变单元行进的第二光衍射到光学检测器 物镜的轴线。

    Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure
    36.
    发明授权
    Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure 有权
    通过采用具有阶梯式衍射光栅结构的平板透镜，与可读写光盘兼容的数字通用光盘的光学记录和拾取头

    公开(公告)号：US06765857B2

    公开(公告)日：2004-07-20

    申请号：US10178528

    申请日：2002-06-25

    申请人： Jang-Hoon Yoo ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong

    发明人： Jang-Hoon Yoo ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong

    IPC分类号： G11B700

    CPC分类号： G11B7/1353 ,  G02B5/1876 ,  G11B7/127 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a second optical source for emitting second light having a relatively long wavelength, a photo detector, an objective lens for focusing the light emitted from the first and second optical sources on the information recording surfaces of the optical discs, respectively, an optical path altering unit for transferring the light emitted from the first and second optical sources to the objective lens and transferring the first and second light reflected from the information recording surfaces of the plurality of discs to the photo detector, respectively, and a flat plate lens for substantially totally transmitting the first light proceeding from the optical path altering unit to the objective lens and diffracting the second light proceeding from the optical path altering unit to the optical axis of the objective lens.

    摘要翻译： 具有楼梯型衍射光栅结构的平板透镜的光学记录和拾取头与DVD和CD-RW兼容。 光学记录和拾取头包括用于发射具有较短波长的第一光的第一光源，用于发射具有较长波长的第二光的第二光源，光检测器，用于将从第一光发射的光聚焦的物镜 和第二光源分别在光盘的信息记录表面上，光路改变单元，用于将从第一和第二光源发射的光转移到物镜，并传送从信息记录表面反射的第一和第二光 以及平板透镜，用于将从光路改变单元前进的第一光基本上全部透射到物镜，并将从光路改变单元行进的第二光衍射到光学检测器 物镜的轴线。

    Optical recording and reproducing apparatus having floating swing arm and optical disk for use therewith
    37.
    发明授权
    Optical recording and reproducing apparatus having floating swing arm and optical disk for use therewith 失效
    具有浮动摆臂和与其一起使用的光盘的光学记录和再现装置

    公开(公告)号：US06657942B2

    公开(公告)日：2003-12-02

    申请号：US09778856

    申请日：2001-02-08

    申请人： Chul-woo Lee ,  Joong-eon Seo ,  Seung-tae Jung ,  Myong-do Ro ,  Kun-ho Cho ,  Dong-seob Jang ,  Jang-hoon Yoo ,  Dae-sik Kim

    发明人： Chul-woo Lee ,  Joong-eon Seo ,  Seung-tae Jung ,  Myong-do Ro ,  Kun-ho Cho ,  Dong-seob Jang ,  Jang-hoon Yoo ,  Dae-sik Kim

    IPC分类号： G11B700

    CPC分类号： G11B7/1356 ,  G11B7/08576 ,  G11B7/0908 ,  G11B7/122 ,  G11B7/1362 ,  G11B7/1376 ,  G11B7/1384 ,  G11B7/24

    摘要： A swing-arm type optical recording and reproducing apparatus and an optical disk applicable to the same. The optical disk includes a substrate having an information recording surface to record and reproduce an information signal, and a protective layer which is provided on the information recording surface and whose surface facing a slider is a flat even surface so that variations in a floating height of the slider can be reduced. The optical recording and reproducing apparatus further includes, an optical head having a light source provided at a swing arm to emit light of a predetermined wavelength; an optical path changing means provided in the optical path of the light emitted from the light source for changing the proceeding path of incident light; a collimating lens installed at the slider to preliminarily converge the light emitted from the light source and entering via the optical path changing means; an objective lens installed at the slider to converge the light which is emitted from the light source and enters via the optical path changing means to form an optical spot on the optical disk; and a photodetector to receive the light which is reflected from the optical disk and enters via the objective lens, the collimating lens, and the optical path changing means. The optical head detects an information signal and an error signal in order to reduce defocus due to variations in ambient temperature and variations in the wavelength of the light of the light source.

    摘要翻译： 一种摆臂式光学记录和再现装置以及可应用于其的光盘。 光盘包括具有信息记录表面以记录和再现信息信号的基板，以及设置在信息记录表面上并且其面向滑块的表面是平坦均匀表面的保护层，使得浮动高度的变化 滑块可以减少。 光学记录和再现装置还包括：光头，其具有设置在摆臂处以发射预定波长的光的光源; 光路改变装置，设置在从光源发射的光的光路中，用于改变入射光的行进路径; 准直透镜，安装在滑块上，以预先会聚从光源射出的光并通过光路改变装置进入; 安装在滑块上的物镜，其会聚从光源射出的光，经由光路改变装置进入，以在光盘上形成光点; 以及光电检测器，用于接收从光盘反射并经由物镜，准直透镜和光路改变装置进入的光。 光头检测信息信号和误差信号，以便减少由于环境温度的变化和光源的光的波长变化引起的散焦。

    Optical pickup movable to control beam shift and field angle in an optical disk drive
    38.
    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

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

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

    IPC分类号： G11B3302

    CPC分类号： G11B7/22

    摘要： 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.

    摘要翻译： 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
    40.
    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。