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    Compatible optical pickup
    1.
    发明授权
    Compatible optical pickup 有权
    兼容光学拾音器

    公开(公告)号：US06337841B1

    公开(公告)日：2002-01-08

    申请号：US09425887

    申请日：1999-10-25

    申请人： Kun-Soo Kim ,  Jong-Ryull Kim ,  Myoung-Soo Choi ,  Hyung-Taek Oh ,  Jong-Hwa Yu ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong ,  Jang-Hoon Yoo

    发明人： Kun-Soo Kim ,  Jong-Ryull Kim ,  Myoung-Soo Choi ,  Hyung-Taek Oh ,  Jong-Hwa Yu ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong ,  Jang-Hoon Yoo

    IPC分类号： G11B700

    CPC分类号： G02B5/1876 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： A compatible optical pickup capable of recording or reproducing information on or from compact disc (CD) family media such as CD rewritable (CD-RW) and digital versatile disc (DVD) by adopting a stepped planar lens having a plurality of gratings. The compatible optical pickup includes a first optical source for emitting a first light beam having a predetermined wavelength; a second optical source for emitting a second light beam having a long wavelength relative to the first light beam; an optical path changing element for changing the traveling path of an incident light beam; an objective lens for condensing the first and second light beams onto optical discs having different thicknesses, respectively; an optical diffraction element having a first region which directly transmits the first and second light beams incident thereto, and a second region bounding the first region, which directly transmits the incident first light beam and diffractingly transmits the second light beam toward an optical axis; and a photodetector for detecting an information signal and an error signal from the first and second light beam which have been reflected by the optical discs and passed through the optical path changing element. Also, the optical diffraction element is a stepped planar lens in which one or more stepped pattern periods each having a plurality of annular gratings are arranged in the second region, wherein the depths of the gratings become smaller moving away from the optical axis, and the maximum depth thereof is a predetermined value.

    摘要翻译： 一种兼容的光学拾取器，其能够通过采用具有多个光栅的阶梯式平面透镜来记录或再现诸如CD可重写（CD-RW）和数字通用光盘（DVD）的光盘（CD）族介质上的信息。 兼容光学拾取器包括用于发射具有预定波长的第一光束的第一光源; 用于发射相对于第一光束具有长波长的第二光束的第二光源; 用于改变入射光束的行进路径的光路改变元件; 用于将第一和第二光束分别聚光到具有不同厚度的光盘上的物镜; 光学衍射元件，其具有直接透射入射到其上的第一和第二光束的第一区域和限定第一区域的第二区域，该第二区域直接透射入射的第一光束并将第二光束衍射地朝向光轴传播; 以及光检测器，用于检测已被光盘反射并通过光路改变元件的来自第一和第二光束的信息信号和误差信号。 此外，光学衍射元件是阶梯式平面透镜，其中在第二区域中布置有具有多个环形光栅的一个或多个阶梯图案周期，其中光栅的深度变得较小，远离光轴移动，并且 其最大深度是预定值。

    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
    3.
    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：US06449237B1

    公开(公告)日：2002-09-10

    申请号：US09425673

    申请日：1999-10-22

    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 ,  G11B7/1275 ,  G11B7/1378 ,  G11B7/13922 ,  G11B2007/0006

    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相对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
    4.
    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
    5.
    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 disc
    8.
    发明授权
    Optical disc 失效
    光盘

    公开(公告)号：US06899937B2

    公开(公告)日：2005-05-31

    申请号：US09513687

    申请日：2000-02-25

    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： G11B7/24 ,  G11B7/007 ,  G11B7/09 ,  G11B7/26 ,  G11B11/105 ,  B32B3/02

    CPC分类号： B82Y10/00 ,  G11B7/007 ,  G11B7/0938 ,  G11B7/263 ,  G11B11/10584 ,  Y10T428/21

    摘要： An optical disc includes a substrate having micro-embossments, in which flat portions referred to as lands, and track guides, referred to as hills, and which protrude from the surfaces of the flat portions are formed. A reflective layer is formed on the substrate, a dielectric layer is formed on the reflective layer, a recording layer is formed on the dielectric layer, and a protective layer is formed on the recording layer. Thus, the lands and hills on the substrate of the optical disc enable disc fabrication to more easily facilitate manufacturing of the optical disc. Accordingly, tracks of the disc can be narrowed, to thereby enhance a recording density of the optical disc.

    摘要翻译： 光盘包括具有微压纹的基板，其中形成有称为凸台的平坦部分，以及被称为凸起部并且从平坦部分的表面突出的导轨。 在基板上形成反射层，在反射层上形成电介质层，在电介质层上形成记录层，在记录层上形成保护层。 因此，光盘的基板上的平台和丘丘能够使盘制造更容易地制造光盘。 因此，可以缩小盘的轨迹，从而提高光盘的记录密度。