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    Method of discriminating discs having different thickness and optical pickup device adopting the same
    31.
    发明授权
    Method of discriminating discs having different thickness and optical pickup device adopting the same 失效
    鉴别具有不同厚度的光盘的方法以及采用该光盘的光拾取装置

    公开(公告)号：US6016293A

    公开(公告)日：2000-01-18

    申请号：US797697

    申请日：1997-02-11

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

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

    IPC分类号： G11B7/004 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B19/12

    CPC分类号： G11B19/12 ,  G11B7/0037 ,  G11B7/131 ,  G11B2007/0006 ,  G11B2007/13727 ,  G11B7/0908

    摘要： A disc discriminating method and an objective lens adopting the same, in which fast disc type discrimination and stable reproduction signal generation is performed. The method includes the steps of increasing and decreasing a focus voltage applied to an actuator of an objective lens facing a disc having an information-recorded plane to move the objective lens in a standby state at a neutral position to a focus position corresponding to the disc, detecting a movement distance value of the objectiveness from a focus signal applied to the actuator when the objective lens moves to the focus position, comparing the movement distance value with a reference value and determining the disc to be a thick disc if the movement distance value is greater than the reference value, and determining the disc to be a thin disc if the movement distance value is less than the reference value.

    摘要翻译： 一种光盘鉴别方法及采用该光盘鉴别方法的物镜，其中执行快盘类型识别和稳定再现信号产生。 该方法包括以下步骤：增加和减少施加到面向具有信息记录平面的盘的物镜的致动器的聚焦电压，以将处于中性位置的待机状态的物镜移动到对应于光盘的对焦位置 当物镜移动到对焦位置时，从施加到致动器的聚焦信号检测出物体的移动距离值，将移动距离值与参考值进行比较，并且如果移动距离值 大于参考值，并且如果移动距离值小于参考值，则将盘确定为薄盘。

    Inverse image generating method apparatus thereof and focus error detecting method using the same and apparatus thereof
    33.
    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。

    Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses
    35.
    发明授权
    Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses 失效

    公开(公告)号：US08503272B2

    公开(公告)日：2013-08-06

    申请号：US10225177

    申请日：2002-08-22

    申请人： Chul-woo Lee ,  Jang-hoon Yoo

    发明人： Chul-woo Lee ,  Jang-hoon Yoo

    IPC分类号： G11B15/02

    CPC分类号： G11B7/1374 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration. The recording and/or reproducing apparatus includes an optical pickup having an objective lens, disposed opposite a disk, having a light passing region divided into central, intermediate and periphery regions corresponding to a near axis area, an intermediate axis area and a far axis area of incident light, where the curvature of the central and peripheral regions is optimized for a thin disk and that of the intermediate region is optimized for a thick disk, a light source irradiating light toward a disk through the objective lens; a photo detector for detecting light reflected from the disk, and a beam splitter, disposed between the objective lens and the light source, for transmitting light from the light source toward the objective lens and for diffracting light reflected from the disks toward the photo detector; and a processing unit to process an information signal to control the incident light generated by the light source, and to process the detected light from the photodetector. Therefore, the optical pickup device can be used for both compact disks (CDs) that are thick using light beam passing the near and intermediate regions of said objective lens, and digital video disks (DVDs) that are thin using light beam passing the near and far axis regions of said objective lens, and detect signals without picking up noise regardless of the thickness of the disk.

    Objective lens for high-density optical focusing and an optical disk in an optical pickup
    36.
    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
    37.
    发明授权
    Optical pickup device 失效
    光学拾取装置

    公开(公告)号：US06400666B1

    公开(公告)日：2002-06-04

    申请号：US09635520

    申请日：2000-08-09

    申请人： Jang-hoon Yoo ,  Kun-ho Cho ,  Yong-hoon Lee ,  Seok-jung Kim ,  Seung-tae Jung ,  Chul-woo Lee ,  Joong-eon Seo

    发明人： Jang-hoon Yoo ,  Kun-ho Cho ,  Yong-hoon Lee ,  Seok-jung Kim ,  Seung-tae Jung ,  Chul-woo Lee ,  Joong-eon Seo

    IPC分类号： G11B7095

    CPC分类号： G11B7/1353 ,  G11B7/0956

    摘要： An optical pickup device includes a light source for generating and emitting light, optical path changing means for changing a proceeding path of incident light, an objective lens for focusing incident light on a recording medium which has a recording surface where information is recorded and a protection layer, at the side where light is input, for protecting the recording surface, a main photodetector for detecting the information signal and/or an error signal by receiving the light reflected by the recording surface of the recording medium and passing through the objective lens and the optical path changing means, and an inclination detecting unit for detecting inclination of the recording medium by receiving the light emitted from the light source and reflected by the surface of the protection layer or the recording surface of the recording medium. Thus, since the inclination of the recording medium is detected using the light emitted from the light source and reflected by the surface of the protection layer or the recording surface of the recording medium, without an additional tilt sensor, the number of parts is reduced and the structure of the device is simplified.

    摘要翻译： 一种光拾取装置，包括用于产生和发光的光源，用于改变入射光的行进路径的光路改变装置，用于将入射光聚焦在具有记录信息的记录表面的记录介质上的物镜和保护 层，在输入光的一侧用于保护记录表面;主光电检测器，用于通过接收由记录介质的记录表面反射并穿过物镜的光检测信息信号和/或误差信号;以及 光路改变装置和倾斜检测单元，用于通过接收从光源发射并被保护层的表面或记录介质的记录表面反射的光来检测记录介质的倾斜度。 因此，由于使用从光源发出并由保护层的表面或记录介质的记录表面反射的光来检测记录介质的倾斜度，所以没有附加的倾斜传感器，部件的数量减少，并且 简化了设备的结构。

    Optical pickup device capable of stable tracking
    38.
    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。

    Optical pickup for recording/reproduction with a light emitting diode light source
    39.
    发明授权
    Optical pickup for recording/reproduction with a light emitting diode light source 失效
    用于用发光二极管光源进行记录/再现的光学拾取器

    公开(公告)号：US06233217B1

    公开(公告)日：2001-05-15

    申请号：US09087861

    申请日：1998-06-01

    申请人： Jang-hoon Yoo ,  Chul-woo Lee ,  Kun-ho Cho

    发明人： Jang-hoon Yoo ,  Chul-woo Lee ,  Kun-ho Cho

    IPC分类号： G11B700

    CPC分类号： G11B7/1384 ,  G11B7/127

    摘要： An optical pickup for recording/reproduction. The optical pickup includes a light source unit including a light emitting diode (LED) to emit light and a waveguide to condense the light emitted from the LED; a collimating lens to collimate the light emitted from the waveguide; an objective lens to condense the light passed through the collimating lens to form a light spot on the recording surface of a recording medium; a light path changing unit arranged on an optical path between the collimating lens and the objective lens, to change a traveling path of the incident light; and a photodetector to receive the light incident via the objective lens and the light path changing unit after being reflected from the recording medium.

    摘要翻译： 用于记录/再现的光学拾取器。 光拾取器包括：光源单元，其包括发光的发光二极管（LED）和用于冷凝从LED发射的光的波导; 准直透镜，用于准直从波导发射的光; 物镜，用于冷凝通过准直透镜的光，以在记录介质的记录表面上形成光斑; 布置在准直透镜和物镜之间的光路上的光路改变单元，以改变入射光的行进路径; 以及光电检测器，用于在从记录介质反射之后接收经由物镜和光路改变单元入射的光。

    Optical pickup having an objective lens compatible with a plurality of optical disk formats
    40.
    发明授权
    Optical pickup having an objective lens compatible with a plurality of optical disk formats 失效
    具有与多个光盘格式兼容的物镜的光学拾取器

    公开(公告)号：US6091691A

    公开(公告)日：2000-07-18

    申请号：US23046

    申请日：1998-02-13

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

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

    IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135

    CPC分类号： G11B7/1353 ,  G11B7/126 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： An optical pickup compatible with a plurality of optical recording media each using light of a different wavelength. The optical pickup includes at least one light source, an objective lens, and a light detector. The objective lens has an inner area, an annular lens area and an outer area such that the annular lens area divides the inner area from the outer area and has a ring shape centered at a vertex. The inner area, the annular lens area and the outer area have aspherical surface shapes to focus light transmitted through the inner area and the outer area into a single light spot by which information can be read from the information recording surface of a relatively thin first optical recording medium and scatter light transmitted through the annular lens area located between the inner area and the outer area so that information cannot be read from the information recording surface of the first optical recording medium, during reproduction of the first optical recording medium. The inner area and the annular lens area transmit light into a single light spot by which information can be read from the information recording surface of a relatively thick second optical recording medium and scatters light transmitted through the outer lens area so that information cannot be read from the information recording surface of the second optical recording medium, during reproduction of the second optical recording medium.

    摘要翻译： 一种与多个使用不同波长的光的多个光学记录介质兼容的光学拾取器。 光拾取器包括至少一个光源，具有将从光源发射的光聚焦到多个光学记录介质之一的信息记录表面上的最佳光点中的功能的物镜，以及光检测器 在从形成有光斑的光记录介质的信息记录面反射后，检测透过物镜的光。 物镜具有内部区域，环形透镜区域和外部区域，使得环形透镜区域将内部区域与外部区域分开并且具有以顶点为中心的环形。 内部区域，环形透镜区域和外部区域具有非球面形状，以将透过内部区域和外部区域的光聚焦成单个光点，通过该单个光点可以从相对较薄的第一个信息记录表面读取信息 光学记录介质和透射通过位于内部区域和外部区域之间的环形透镜区域的散射光，使得在再现第一光学记录介质期间不能从第一光学记录介质的信息记录表面读取信息。 内部区域和环形透镜区域将光透射到单个光点中，通过该单个光点可以从相对较厚的第二光学记录介质的信息记录表面读取信息，并散射透过外部透镜区域的光，从而不能从 在第二光学记录介质的再现期间，第二光学记录介质的信息记录表面。