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    Objective lens for high-density optical focusing and an optical disk in an optical pickup
    1.
    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。

    Objective lenes for high-density optical focusing and an optical disk in an optical pickup
    2.
    发明申请
    Objective lenes 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：US20050169154A1

    公开(公告)日：2005-08-04

    申请号：US11091449

    申请日：2005-03-29

    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。

    Objective lens for high-density optical focusing and an optical disk in an optical pickup
    3.
    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：US07200098B2

    公开(公告)日：2007-04-03

    申请号：US11091449

    申请日：2005-03-29

    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： 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 pickup device capable of stable tracking
    4.
    发明授权
    Optical pickup device capable of stable tracking 失效
    能够稳定跟踪的光学拾取装置

    公开(公告)号：US06396638B1

    公开(公告)日：2002-05-28

    申请号：US09607928

    申请日：2000-06-30

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

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

    IPC分类号： G02B2714

    CPC分类号： B82Y10/00 ,  G11B7/08564 ,  G11B7/1356 ,  G11B7/139 ,  G11B11/10543 ,  G11B11/10576 ,  G11B2007/13725

    摘要： An optical pickup device includes a light source for generating light, a light path changing means for changing the traveling path of incident light, an objective lens for focusing incident light to form a light spot on a recording medium and having an incidence region of a predetermined size, a tracking mirror disposed on the light path between the light path changing means and the objective lens, for reflecting incident light emitted from the light source so that the light spot traces proper track positions of the recording medium, a lens unit consisting of at least two lenses which allow the light reflected from the tracking mirror to be incident on the incidence region of the objective lens, and a photo detecting unit for receiving light reflected from the recording medium and having passed through the objective lens and the light path changing means. Since the optical pickup device performs tracking by adjusting the reflection direction of incident light by means of a tracking mirror with an objective lens fixed, a tracking error signal offset due to movement of the objective lens is not generated, thereby enabling stable tracking.

    摘要翻译： 一种光拾取装置，包括用于产生光的光源，用于改变入射光的行进路径的光路改变装置，用于聚焦入射光以在记录介质上形成光点并具有预定的入射区域的入射区域的物镜 尺寸，设置在光路改变装置和物镜之间的光路上的跟踪镜，用于反射从光源发射的入射光，使得光斑跟踪记录介质的正确轨道位置，由...组成的透镜单元 允许从跟踪反射镜反射的光入射到物镜的入射区域的至少两个透镜，以及用于接收从记录介质反射并且已经通过物镜并且通过光路改变装置的光的光检测单元 。 由于光学拾取装置通过利用物镜固定的跟踪反射镜调节入射光的反射方向进行跟踪，所以不会产生由于物镜的移动导致的跟踪误差信号偏移，从而能够进行稳定的跟踪。

    Objective lens for high-density optical focusing, and optical pickup using the same
    5.
    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 having plural optical sources and plural optical detectors
    10.
    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。