公开(公告)号：US20070025229A1

公开(公告)日：2007-02-01

申请号：US11290457

申请日：2005-12-01

申请人： Bong-Gi Kim ,  Soo-Han Park ,  Young-Man Ahn ,  Jang-Hoon Yoo

发明人： Bong-Gi Kim ,  Soo-Han Park ,  Young-Man Ahn ,  Jang-Hoon Yoo

IPC分类号： G11B7/135

CPC分类号： G11B7/1356 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/13927 ,  G11B7/1395 ,  G11B2007/0006

摘要： An optical pickup apparatus according to an embodiment of the present invention, comprises an optical unit for projecting a plurality of wavelengths of light, the light including a celadon light, toward a recording medium and receiving the light reflected from the recording medium to thereby detect an information signal and an error signal, and a compatible objective lens for focusing a light projected from the optical unit to thereby form an optical spot on a recording surface of the recording medium and applying at least three light having different wavelength ranges to be compatibly used for both the high-density and the low-density recording mediums. Accordingly, the optical pickup apparatus is capable of compatibly employing a high-density recording medium, which uses a celadon light and is slimmer than a digital versatile disc (DVD), and at least one low-density recording medium.

摘要翻译： 根据本发明实施例的光学拾取装置包括一个光学单元，用于将多个波长的光（包括青瓷光的光）投射到记录介质上，并接收从记录介质反射的光，从而检测一个 信息信号和误差信号，以及用于聚焦从光学单元投影的光的兼容物镜，从而在记录介质的记录表面上形成光点，并且将至少三个具有不同波长范围的光并入，用于 高密度和低密度记录介质。 因此，光拾取装置能够兼容使用青瓷光的高密度记录介质，并且比数字通用盘（DVD）更薄，以及至少一种低密度记录介质。

公开(公告)号：US20060158995A1

公开(公告)日：2006-07-20

申请号：US11250416

申请日：2005-10-17

申请人： Seong-Su Park ,  Young-Man Ahn ,  Jang-Hoon Yoo ,  Jung-Woo Hong

发明人： Seong-Su Park ,  Young-Man Ahn ,  Jang-Hoon Yoo ,  Jung-Woo Hong

IPC分类号： G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0903 ,  G11B7/0943 ,  G11B7/131 ,  G11B2007/0006

摘要： An optical pickup device and a focusing control method thereof are provided which can determine a DC offset caused by cross-talk of a focus error signal, eliminate the DC offset based on the determination, correct errors in a focus error signal of a main beam, which is caused by interference of side beams, so that optimal focus tracking can be performed. For this, the optical pickup device has at least one or more light sources, a diffraction optical element which diffracts light from the light source into a plurality of beams, an objective lens which condenses the plurality of beams diffracted by the diffraction optical element, a photo detector which detects the plurality of beams reflected from discs, and an auxiliary photo detector which detects the plurality of beams reflected from the discs to perform error correction of focus error detection signals obtained by the photo detector.

摘要翻译： 提供一种光拾取装置及其聚焦控制方法，其可以确定由聚焦误差信号的串扰引起的DC偏移，基于该确定消除DC偏移，校正主波束的聚焦误差信号中的误差， 这是由侧波束的干扰引起的，从而可以进行最佳的聚焦跟踪。 为此，光学拾取装置具有至少一个或多个光源，将来自光源的光衍射成多个光束的衍射光学元件，会聚由衍射光学元件衍射的多个光束的物镜， 光检测器，其检测从光盘反射的多个光束;以及辅助光检测器，其检测从盘反射的多个光束，以对由光检测器获得的聚焦误差检测信号进行纠错。

公开(公告)号：US07613095B2

公开(公告)日：2009-11-03

申请号：US11290457

申请日：2005-12-01

申请人： Bong-Gi Kim ,  Soo-Han Park ,  Young-Man Ahn ,  Jang-Hoon Yoo

发明人： Bong-Gi Kim ,  Soo-Han Park ,  Young-Man Ahn ,  Jang-Hoon Yoo

IPC分类号： G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/13927 ,  G11B7/1395 ,  G11B2007/0006

摘要： An optical pickup apparatus according to an embodiment of the present invention, comprises an optical unit for projecting a plurality of wavelengths of light, the light including a celadon light, toward a recording medium and receiving the light reflected from the recording medium to thereby detect an information signal and an error signal, and a compatible objective lens for focusing a light projected from the optical unit to thereby form an optical spot on a recording surface of the recording medium and applying at least three light having different wavelength ranges to be compatibly used for both the high-density and the low-density recording mediums. Accordingly, the optical pickup apparatus is capable of compatibly employing a high-density recording medium, which uses a celadon light and is slimmer than a digital versatile disc (DVD), and at least one low-density recording medium.

摘要翻译： 根据本发明实施例的光学拾取装置包括一个光学单元，用于将多个波长的光（包括青瓷光的光）投射到记录介质上，并接收从记录介质反射的光，从而检测一个 信息信号和误差信号，以及用于聚焦从光学单元投影的光的兼容物镜，从而在记录介质的记录表面上形成光点，并且将至少三个具有不同波长范围的光并入，用于 高密度和低密度记录介质。 因此，光拾取装置能够兼容使用青瓷光的高密度记录介质，并且比数字通用盘（DVD）更薄，以及至少一种低密度记录介质。

公开(公告)号：US20060176789A1

公开(公告)日：2006-08-10

申请号：US11331317

申请日：2006-01-13

申请人： Jong-Uk Kim ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Young-Sun Jeon ,  Hyung-Jin Kim

发明人： Jong-Uk Kim ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Young-Sun Jeon ,  Hyung-Jin Kim

IPC分类号： G11B5/09

CPC分类号： G11B20/10 ,  G11B2007/0006 ,  G11B2020/10879

摘要： A data line switching circuit of an optical pickup device is disclosed. In order to drive multiple formats of optical disks, the data line switching circuit applies data signals of a corresponding format to the optical pickup device through a common connector by connecting data lines of the corresponding format to the common connector according to control signals from a control unit, thereby minimizing the number of terminals of the connector to obtain a miniaturized optical pickup device.

摘要翻译： 公开了一种光拾取装置的数据线切换电路。 为了驱动多种格式的光盘，数据线切换电路根据来自控制器的控制信号，将相应格式的数据线连接到公共连接器，通过公共连接器将相应格式的数据信号应用于光学拾取装置 从而最小化连接器的端子数以获得小型化的光学拾取装置。

公开(公告)号：US20060163459A1

公开(公告)日：2006-07-27

申请号：US11329119

申请日：2006-01-11

申请人： Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

发明人： Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

IPC分类号： G01D5/34

CPC分类号： G11B7/1376 ,  G11B7/1263 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/13925 ,  G11B2007/0006

摘要： An optical pickup apparatus includes a first objective lens having a low numerical aperture (NA) suitable for a low density recording medium, a second objective lens having a high NA suitable for a high density recording medium, a first light source that emits short wavelength light which is focused onto an optical recording medium by the first and second objective lenses, a first photodetector that receives a returning reflected light from the optical recording medium, and a first optical path converter for selectively guiding part of the light emitted from the first light source towards the first or the second objective lens, and guiding the reflected light towards the first photodetector.

摘要翻译： 一种光学拾取装置包括具有适用于低密度记录介质的低数值孔径（NA）的第一物镜，具有适用于高密度记录介质的高NA的第二物镜，发射短波长光的第一光源 其通过第一和第二物镜聚焦到光学记录介质上，第一光电检测器，其接收来自光学记录介质的返回反射光;以及第一光路转换器，用于选择性地引导从第一光源发射的光的一部分 朝向第一或第二物镜，并且将反射光引向第一光电检测器。

公开(公告)号：US07782734B2

公开(公告)日：2010-08-24

申请号：US11329069

申请日：2006-01-11

申请人： Bong-Gi Kim ,  Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

发明人： Bong-Gi Kim ,  Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1353 ,  G11B7/1376 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

摘要： An optical pickup which is compatible with different types of media is disclosed. A plurality of light sources emit light with different wavelengths. Light path changers change the path of light emitted by the plurality of light sources so that the light is incident upon an objective lens. The objective lens focuses the incident light onto a recording medium. A collimating lens is disposed in front of the objective lens to collimate the incident lights. The collimating lens is movable to correct a spherical aberration. A diffractive optical element is disposed in a path of a light with a short wavelength and has a diffractive surface to correct a chromatic aberration.

摘要翻译： 公开了与不同类型的介质兼容的光学拾取器。 多个光源发射具有不同波长的光。 光路改变器改变由多个光源发射的光的路径，使得光入射到物镜上。 物镜将入射光聚焦到记录介质上。 准直透镜设置在物镜前面以准直入射光。 准直透镜可移动以校正球面像差。 衍射光学元件设置在具有短波长的光的路径中并且具有衍射面以校正色差。

公开(公告)号：US07435934B2

公开(公告)日：2008-10-14

申请号：US11329119

申请日：2006-01-11

申请人： Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

发明人： Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

IPC分类号： G11B7/00

CPC分类号： G11B7/1376 ,  G11B7/1263 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/13925 ,  G11B2007/0006

摘要： An optical pickup apparatus includes a first objective lens having a low numerical aperture (NA) suitable for a low density recording medium, a second objective lens having a high NA suitable for a high density recording medium, a first light source that emits short wavelength light which is focused onto an optical recording medium by the first and second objective lenses, a first photodetector that receives a returning reflected light from the optical recording medium, and a first optical path converter for selectively guiding part of the light emitted from the first light source towards the first or the second objective lens, and guiding the reflected light towards the first photodetector.

摘要翻译： 一种光学拾取装置包括具有适用于低密度记录介质的低数值孔径（NA）的第一物镜，具有适用于高密度记录介质的高NA的第二物镜，发射短波长光的第一光源 其通过第一和第二物镜聚焦到光学记录介质上，第一光电检测器，其接收来自光学记录介质的返回反射光;以及第一光路转换器，用于选择性地引导从第一光源发射的光的一部分 朝向第一或第二物镜，并且将反射光引向第一光电检测器。

公开(公告)号：US20060164953A1

公开(公告)日：2006-07-27

申请号：US11329069

申请日：2006-01-11

申请人： Bong-Gi Kim ,  Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

发明人： Bong-Gi Kim ,  Soo-Han Park ,  Jang-Hoon Yoo ,  Hag-Hyeon Jang ,  Ho-Sik You

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1353 ,  G11B7/1376 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

摘要： An optical pickup which is compatible with different types of media is disclosed. A plurality of light sources emit light with different wavelengths. Light path changers change the path of light emitted by the plurality of light sources so that the light is incident upon an objective lens. The objective lens focuses the incident light onto a recording medium. A collimating lens is disposed in front of the objective lens to collimate the incident lights. The collimating lens is movable to correct a spherical aberration. A diffractive optical element is disposed in a path of a light with a short wavelength and has a diffractive surface to correct a chromatic aberration.

摘要翻译： 公开了与不同类型的介质兼容的光学拾取器。 多个光源发射具有不同波长的光。 光路改变器改变由多个光源发射的光的路径，使得光入射到物镜上。 物镜将入射光聚焦到记录介质上。 准直透镜设置在物镜前面以准直入射光。 准直透镜可移动以校正球面像差。 衍射光学元件设置在具有短波长的光的路径中并且具有衍射面以校正色差。

公开(公告)号：US07046611B2

公开(公告)日：2006-05-16

申请号：US09930964

申请日：2001-08-17

申请人： Jang-Hoon Yoo ,  Chul-Hoo Lee

发明人： Jang-Hoon Yoo ,  Chul-Hoo Lee

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G02B5/32 ,  G11B7/1275 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to emit light beams having the different wavelengths, a holographic lens including a holographic ring to transmit the light beams incident in an inner region of the holographic ring, and to diffract a specific light beam among the light beams emitted from the laser light sources incident in an outer region relative to the inner region, an objective lens to focus the light beams passed through the holographic ring lens on the respective information recording surfaces of the two types of the optical recording media, optical elements to alter optical paths of the light beams reflected from the information recording surfaces of the optical recording media to corresponding photodetectors.