公开(公告)号：US5991254A

公开(公告)日：1999-11-23

申请号：US903063

申请日：1997-07-30

申请人： Chul-woo Lee ,  Keon-ho Cho ,  Chong-sam Chung

发明人： Chul-woo Lee ,  Keon-ho Cho ,  Chong-sam Chung

IPC分类号： G11B7/00

CPC分类号： G11B7/1365 ,  G11B7/1353

摘要： An optical pickup adopting a multi-coated polarization holographic optical element (HOE). The optical pickup has a light source, an objective lens for converging light emitted from the light source on a recording medium, a holographic optical element (HOE) arranged along an optical path between the light source and the objective lens, for changing traveling of the incident light, a phase delay plate arranged between the HOE and the recording medium, for changing a polarization direction of the incident light, and a photodetector for receiving the light reflected by the recording medium, wherein the HOE includes a polarization beam splitter for transmitting one polarized light component of the incident light and reflecting the other polarized light component thereof; and a reflection member having a hologram pattern for diffracting the light passed through the polarization beam splitter, for reflecting the incident light, and wherein the HOE is arranged at an angle between the light source and the phase delay plate. Also, when a transmission-type HOE is adopted, the phase delay plate is arranged at an angle along the optical path between the HOE and the objective lens and includes multiple coating layers for transmitting one polarized light component of the light incident from the light source and reflecting the other polarized light component, and a reflection layer formed on one side of the multiple coating layers, for completely reflecting the incident light.

摘要翻译： 采用多层偏振全息光学元件（HOE）的光学拾取器。 光拾取器具有光源，用于将从光源发射的光会聚在记录介质上的物镜，沿着光源和物镜之间的光路布置的全息光学元件（HOE），用于改变 入射光，布置在HOE和记录介质之间的相位延迟板，用于改变入射光的偏振方向;以及光电检测器，用于接收由记录介质反射的光，其中HOE包括偏振分束器，用于传输一个 入射光的偏振光分量并反射其他偏振光分量; 以及反射构件，其具有用于衍射穿过偏振分束器的光用于反射入射光的全息图，并且其中HOE以光源和相位延迟板之间的角度布置。 此外，当采用透射型HOE时，相位延迟板沿着HOE和物镜之间的光路以一定角度布置，并且包括多个涂覆层，用于透射从光源入射的光的一个偏振光分量 并且反射另一个偏振光分量，以及形成在多个涂层的一侧上的反射层，用于完全反射入射光。

公开(公告)号：US06198714B1

公开(公告)日：2001-03-06

申请号：US09505155

申请日：2000-02-15

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： G11B700

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 having a function of focusing light emitted from the light source into the optimal light spot on an information recording surface of one of the plurality of the optical recording media, and a light detector to detect light transmitted through the objective lens after being reflected from the information recording surface of the optical recording medium on which the light spot is formed. 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薄的第一光学信息记录表面读取信息 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，使得在第一光学记录介质的再现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。

公开(公告)号：US5822135A

公开(公告)日：1998-10-13

申请号：US640474

申请日：1996-05-01

申请人： Chul-woo Lee ,  Dong-ho Shin ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Yong-hoon Lee

发明人： Chul-woo Lee ,  Dong-ho Shin ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Yong-hoon Lee

IPC分类号： B29D11/00 ,  G02B3/10 ,  G02B27/58 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G02B9/00

CPC分类号： G11B7/1353 ,  B29D11/00009 ,  G02B27/58 ,  G02B3/10 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1381 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727 ,  G11B7/0045 ,  G11B7/005 ,  Y10S425/808

摘要： A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in an intermediate region between near and far axes of an incident light beam, thus providing a simplified and inexpensive device for using discs of differing thickness in a single disc drive, by reducing the spherical aberration effect.

公开(公告)号：US06590853B1

公开(公告)日：2003-07-08

申请号：US09281230

申请日：1999-03-30

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

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

IPC分类号： G11B7085

CPC分类号： G11B7/122 ,  G11B7/08576 ,  G11B7/08594 ,  G11B7/14 ,  G11B7/24038

摘要： A swing arm driving type optical recording/reproducing apparatus includes a base, at least one optical disk rotatably installed on the base, both sides of which are information recording surfaces and a plurality of optical pickups which are equal in number to the information recording surfaces so as to form light spots on the respective information recording surfaces of the optical disk. Each optical pickup includes a light source for irradiating light. The apparatus also includes optical path changing units respectively arranged on optical paths between the light sources and respective ones of the information recording surfaces for changing the traveling paths of the lights and objective lenses arranged between the optical path changing units and the respective information recording surfaces for condensing incident light on the respective information recording surfaces. Photodetectors receive the lights reflected from the respective information recording surfaces and incident via the respective objective lenses and the optical path changing units. A swing member includes a mount on which the light sources, the optical path changing units and the photodetectors are installed. A plurality of swing arms extend from the mount. A suspension has one end which is installed on a surface of each swing arm and is adjacent to the respective information recording surface for elastically biasing the other end. A slider is installed at the other end of the suspension, which contacts the respective information recording surface by the elastic bias of the suspension and into which the respective objective lens is loaded. A supporting unit is interposed between the base and the mount for supporting the swing member to be reciprocally rotatable centering around one hinge point on the base and a magnetic driver for reciprocally rotating the swing member.

摘要翻译： 摇臂驱动型光学记录/再现装置包括基座，至少一个可旋转地安装在基座上的光盘，其两侧是信息记录表面和与信息记录表面相等的多个光学拾取器 以便在光盘的相应信息记录表面上形成光斑。 每个光学拾取器包括用于照射光的光源。 该装置还包括光路改变单元，其分别设置在光源和信息记录表面之间的光路上，用于改变布置在光路改变单元和各个信息记录表面之间的光和物镜的行进路径， 将入射光聚光在相应的信息记录表面上。 光检测器接收从相应的信息记录表面反射并经由各个物镜和光路改变单元入射的光。 摆动构件包括其上安装有光源，光路改变单元和光电检测器的安装件。 多个摆臂从支座延伸。 悬架的一端安装在每个摆臂的表面上，并且与相应的信息记录表面相邻以弹性地偏压另一端。 滑块安装在悬架的另一端，其通过悬架的弹性偏置与相应的信息记录表面接触，并且相应的物镜被加载到该悬架中。 支撑单元插入在基座和支架之间，用于支撑摆动构件以使基座上的一个铰链点为中心往复旋转，以及用于使摆动构件往复旋转的磁性驱动器。

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。

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。

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。

公开(公告)号：US5629514A

公开(公告)日：1997-05-13

申请号：US458165

申请日：1995-06-02

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： G11B7/09 ,  G11B7/135 ,  G01J1/20 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/0943 ,  G11B2007/0919

摘要： A focus error detector for detecting a signal representing a degree of a focus error of an objective lens with respect to an optical disk in an optical pickup, in order to eliminate errors due to an optical axis shift or tilt of the reflected light reflected from the optical disk, includes a diffraction device for diffracting and splitting the reflected light reflected. The focus error detector a critical angle reflector having critical angle reflecting planes for reflecting the two diffracted light rays at two critical angles, two bi-segmented photo-detectors for receiving the two diffracted light rays reflected from the critical angle reflector, respectively, and detecting signals depending on the received light amount, and a circuit for differentiating and summing each signal of the two bi-segmented photo-detectors so as to offset the light amount difference due to the tilt or shift of the reflected light and outputting a desired signal. Therefore, only an original focus error signal is output, irrespective of an optical shift or tilt of the reflected light, so that malfunction of the optical pickup is prevented and clean recording and reproduction is enabled.

摘要翻译： 一种聚焦误差检测器，用于检测表示物镜相对于光学拾取器中的光盘的聚焦误差的程度的信号，以便消除由于光学偏移反射的反射光的光轴偏移或倾斜引起的误差 光盘包括用于衍射和分裂反射的反射光的衍射装置。 聚焦误差检测器，具有用于以两个临界角度反射两个衍射光线的临界角反射面的临界角反射镜，分别用于接收从临界角反射器反射的两个衍射光线的两个双段光电检测器， 信号，以及用于对两个双分段光电检测器的每个信号进行微分和求和以便偏移由于反射光的倾斜或偏移引起的光量差异并输出所需信号的电路。 因此，不管反射光的光学偏移或倾斜如何，仅输出原始聚焦误差信号，从而防止光学拾取器的故障，并且能够进行清洁的记录和再现。

公开(公告)号：US5587976A

公开(公告)日：1996-12-24

申请号：US555967

申请日：1995-11-13

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

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

IPC分类号： G11B11/10 ,  G11B5/00 ,  G11B5/012 ,  G11B5/35 ,  G11B5/596 ,  G11B7/12 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10543 ,  G11B5/00 ,  G11B5/012 ,  G11B5/35 ,  G11B5/596

摘要： An optical pickup for an optical magnetic disc includes a light source, a grating for diffracting the light into a main light beam and auxiliary light beams, a plurality of magnetic dipole tips arranged above the optical magnetic disc so as to interact with the magnetic signal stored in the optical magnetic disc. Also, a plurality of mirror members each attached to the rear of each magnetic dipole tips are for reflecting the light incident on the mirror member, and a photodetector for detecting track errors and the stored information by receiving the light reflected from the mirror members are provided, thereby detecting the error signal and reproducing information by the interaction with the magnetic dipoles of the disc so that the recording density can be increased without increasing the conventional land and groove areas in the disc.

摘要翻译： 一种用于光磁盘的光拾取器包括光源，用于将光衍射成主光束的光栅和辅助光束，布置在光磁盘上方的多个磁偶极子尖端，以便与存储的磁信号相互作用 在光磁盘中。 此外，各个安装在每个磁偶极头的后面的多个镜构件用于反射入射在镜构件上的光，并且设置用于检测轨道错误的光电检测器和通过接收从镜构件反射的光的存储信息 从而通过与盘的磁偶极子的相互作用来检测误差信号和再现信息，从而可以增加记录密度，而不增加盘中常规的平台和凹槽区域。

公开(公告)号：US5537384A

公开(公告)日：1996-07-16

申请号：US364983

申请日：1994-12-28

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

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

IPC分类号： G11B7/09 ,  G11B7/095 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/0912 ,  G11B7/095

摘要： A focus error detector for detecting a focus error of an objective lens with respect to an optical disk. The focus error detector includes a beam splitter for splitting light reflected from the optical disk. Two critical angle prisms having critical angle reflecting surfaces are included for respectively reflecting the light rays from the beam splitter at the respective critical angles onto two bisectional photo-detectors. The bisectional photo-detector generates detecting signals responsive to the amount of light received. The detecting signals are differentiated and added in a direction offsetting a shift or tilt of the reflected light. Accordingly, only the focus error signal is detected, irrespective of the tilt and shift of the optical axis of the reflected light. Thus, malfunction of an optical pickup is prevented, thereby providing for the uncorrupted recording and reproduction of data.

摘要翻译： 一种用于检测物镜相对于光盘的聚焦误差的聚焦误差检测器。 聚焦误差检测器包括用于分离从光盘反射的光的分束器。 包括具有临界角反射表面的两个临界角棱镜，用于分别将来自分束器的光线以各自的临界角反射到两个二分光电检测器上。 二分光电检测器响应于所接收的光量产生检测信号。 检测信号在偏移反射光的偏移或倾斜的方向上被微分并相加。 因此，不管反射光的光轴的倾斜和偏移如何，仅检测聚焦误差信号。 因此，防止了光学拾取器的故障，由此提供数据的不良记录和再现。