公开(公告)号：US06285646B1

公开(公告)日：2001-09-04

申请号：US09198451

申请日：1998-11-24

申请人： Jang-Hoon Yoo ,  Yong-Jae Lee ,  Pyong-Yong Seong ,  Chul-Woo Lee

发明人： Jang-Hoon Yoo ,  Yong-Jae Lee ,  Pyong-Yong Seong ,  Chul-Woo Lee

IPC分类号： G11B700

CPC分类号： G11B7/1374 ,  G11B2007/0006

摘要： An optical pickup device including an objective lens which is compatible with a plurality of optical disks of respectively different specifications, such as a digital versatile disk (DVD), a compact disk-recordable (CD-R) medium, a compact disk (CD) and a laser disk (LD). The optical pickup device includes a laser source to emit light, an objective lens to focus the light emitted from the laser source on respective information recording surfaces of a plurality of optical recording media as an optimal optical spot, and an optical detector to detect light reflected from the information recording surface of the optical recording medium on which the optical spot has been focused and transmitted through the objective lens. The objective lens includes a first lens area, a second lens area, and a third lens area to focus the light emitted from the laser source. The first lens area has an aspherical surface corresponding to a first optical recording medium and a second optical recording medium, the second lens area has an aspherical surface corresponding to the second optical recording medium, and the third lens area has an aspherical surface corresponding to the first optical recording medium. As a result, the optical pickup can be compatible with a plurality of the optical disks of a respectively different specification irrespective of the thickness of the disk.

摘要翻译： 一种光学拾取装置，包括与分别不同规格的多个光盘兼容的物镜，诸如数字通用盘（DVD），可压缩盘可记录（CD-R）介质，光盘（CD） 和激光盘（LD）。 光拾取装置包括用于发光的激光源，将从激光源发射的光聚焦到作为最佳光点的多个光记录介质的各个信息记录表面上的物镜，以及检测反射光的光检测器 从其上已经聚焦并透过物镜的光记录介质的信息记录表面。 物镜包括第一透镜区域，第二透镜区域和用于聚焦从激光源发射的光的第三透镜区域。 第一透镜区域具有对应于第一光学记录介质和第二光学记录介质的非球面，第二透镜区域具有对应于第二光学记录介质的非球面，并且第三透镜区域具有对应于第二光学记录介质的非球面 第一光记录介质。 结果，光拾取器可以与分别不同规格的多个光盘兼容，而与盘的厚度无关。

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。

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。

公开(公告)号：US06266315B1

公开(公告)日：2001-07-24

申请号：US09196111

申请日：1998-11-20

申请人： Chul-Woo Lee ,  Chong-Sam Chung ,  Yong-Moon Lee ,  Cheol-Sung Yeon ,  Joong-Eon Seo ,  Young-Min Cheong ,  Dong-Ho Shin ,  Kun-Mo Cho ,  Pyong-Yong Seong ,  Jang-Hoon Yoo

发明人： Chul-Woo Lee ,  Chong-Sam Chung ,  Yong-Moon Lee ,  Cheol-Sung Yeon ,  Joong-Eon Seo ,  Young-Min Cheong ,  Dong-Ho Shin ,  Kun-Mo Cho ,  Pyong-Yong Seong ,  Jang-Hoon Yoo

IPC分类号： G11B700

CPC分类号： G11B7/1387 ,  G11B7/08576 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/122 ,  G11B7/1374 ,  G11B7/22 ,  G11B7/24 ,  G11B11/10547 ,  G11B11/10554 ,  G11B11/1058 ,  G11B11/10584 ,  G11B2007/13725

摘要： An optical focusing system which uses a light beam emitted from a light source, includes a refractive surface on one side of the optical focusing system and having a first radius of curvature, a first reflection surface on the above one side, surrounding the refractive surface and having a second radius of curvature being different from the first radius of curvature, a transparent beam focusing surface on the other side of the optical focusing system, and a second reflection surface on the above other side and surrounding the beam focusing surface. The refractive surface refracts an incident light beam, the second reflection surface reflects a light beam refracted by the refractive surface toward the first reflection surface, and the first reflection surface focuses a laser light beam reflected from the second reflection surface on the beam focusing surface as a focused beam spot. The optical focusing system can be used in an optical pickup. The optical pickup uses the optical focusing system to generate, from a light beam e.g. laser light emitted from a light source, a beam spot used for recording or reading information to a recording medium. The optical pickup uses a near field effect provided by an optical focusing system according to the present invention, to allow a superior density of recording or reading. Further, the optical focusing system according to the invention can use a light beam having a beam diameter smaller than that of the laser beam used for an existing optical focusing system for forming a near field. Thus, the optical pickup according to the invention can record or read information on an optical disk having a surface recording density of 10 Gbit/inch2 or more. Even if an incident light beam inclination occurs due to movement of the disk or the optical pickup, information can be recorded on or read from a disk accurately. Also, the assembly of the optical focusing system and the adjustment of the assembled optical focusing system are easily performed.

公开(公告)号：US07016291B2

公开(公告)日：2006-03-21

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： G11B7/00

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.

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。

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。

公开(公告)号：US06449229B1

公开(公告)日：2002-09-10

申请号：US09328375

申请日：1999-06-09

申请人： Seok-Jung Kim ,  Byung-Ryul Ryoo ,  Yong-Ki Son ,  Pyong-Yong Seong ,  Yong-Jae Lee ,  Tae-Kyung Kim ,  Jang-Hoon Yoo

发明人： Seok-Jung Kim ,  Byung-Ryul Ryoo ,  Yong-Ki Son ,  Pyong-Yong Seong ,  Yong-Jae Lee ,  Tae-Kyung Kim ,  Jang-Hoon Yoo

IPC分类号： G11B700

CPC分类号： G11B7/0956 ,  G11B7/0933 ,  G11B7/0935

摘要： An optical pickup assembly includes a base, a bobbin having an objective lens mounted thereon, the bobbin being installed at the base so as to be movable and having a pair of first side surfaces parallel to a radial direction of a disk and a pair of second side surfaces parallel to the tangential direction of a disk track, a focus coil wound around the bobbin for driving the objective lens in a focus direction, a track coil installed at the first side surfaces for driving the objective lens in a radial direction of the disk, a driving magnet installed at the base to face the first side surfaces, a tilt coil installed at the second side surfaces for driving the objective lens in response to the relative inclination between the objective lens and the disk, a first tilt magnet installed at the base such that one polarity thereof faces the tilt coil, a second tilt magnet installed at an upper portion of the first tilt magnet such that another polarity opposite to the one polarity thereof faces the tilt coil, an inclination detector for detecting the relative inclination between the objective lens and the disk, and a cover coupled to the base to protect the objective lens.

摘要翻译： 一种光学拾取器组件，包括基座，安装有物镜的线轴，所述线轴安装在所述基座上以便可移动，并且具有平行于盘的一半径的一对第一侧表面和一对第二 平行于盘轨道的切线方向的侧面，卷绕在筒管上的聚焦线圈，用于在聚焦方向上驱动物镜;轨道线圈，安装在第一侧面，用于沿盘的径向驱动物镜 安装在所述基座上以面对所述第一侧面的驱动磁体，安装在所述第二侧表面处以响应于所述物镜和所述盘之间的相对倾斜来驱动所述物镜的倾斜线圈，安装在所述物镜上的第一倾斜磁体 使得其一个极性面向倾斜线圈，第二倾斜磁体安装在第一倾斜磁体的上部，使得与其一个极性相反的另一极性f 倾斜线圈，用于检测物镜和盘之间的相对倾斜度的倾斜检测器，以及联接到基座以保护物镜的盖。

公开(公告)号：US06222801B1

公开(公告)日：2001-04-24

申请号：US09266862

申请日：1999-03-12

申请人： Jang-Hoon Yoo ,  Pyong-Yong Seong ,  Yong-Jae Lee ,  Tae-Kyung Kim ,  Yong-Ki Son

发明人： Jang-Hoon Yoo ,  Pyong-Yong Seong ,  Yong-Jae Lee ,  Tae-Kyung Kim ,  Yong-Ki Son

IPC分类号： G11B712

CPC分类号： G11B7/1398 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/139 ,  G11B2007/0006

摘要： An optical pickup includes a variable iris having a numerical aperture is adjusted according to wavelength of light and can be compatibly used for discs having respectively different specifications. The optical pickup includes a plurality of laser sources respectively emitting light of different wavelengths, an objective lens for focusing the light emitted from the laser sources into an optical spot optimized to each information recording surface of the plurality of discs, at least one photo detector for detecting the light reflected from the information recording surfaces of the corresponding discs where the optical spot is focused and passed through the objective lens, an optical element for adjusting an optical path so that the light emitted from the laser sources is directed toward the objective lens and the light emitted from the objective lens is directed toward the at least one photo detector, and a variable iris coupled between the laser sources and the objective lens, selectively operating according to the wavelength. The optical pickup can be compatibly used for discs having respectively different specifications irrespective of the thicknesses of the discs. The variable iris selectively operates in the case that light of two or more wavelengths is used, to thereby provide an effect of accomplishing an optimal optical spot on the discs.

摘要翻译： 光拾取器包括具有数值孔径的可变虹膜，其根据光的波长进行调整，并且可以兼容地用于分别具有不同规格的光盘。 光拾取器包括分别发射不同波长的光的多个激光源，用于将从激光源发射的光聚焦到优化到多个光盘的每个信息记录表面的光点中的物镜，至少一个光检测器，用于 检测从光点聚焦并通过物镜的相应盘的信息记录表面反射的光;光学元件，用于调节光路，使得从激光源发射的光朝向物镜;以及 从物镜发射的光指向至少一个光电检测器，并且耦合在激光源和物镜之间的可变光圈根据波长选择性地工作。 光学拾取器可以兼容地用于具有不同规格的盘，而与盘的厚度无关。 在使用两个或更多个波长的光的情况下，可变光圈选择性地操作，从而提供在光盘上实现最佳光点的效果。

公开(公告)号：US06400658B1

公开(公告)日：2002-06-04

申请号：US09275814

申请日：1999-03-25

申请人： Chang-Jin Yang ,  Pyong-Yong Seong ,  Seong-Sin Joo ,  Soo-Yul Jung ,  Jung-Eon Seo ,  Yong-Jae Lee ,  Jang-Hoon Yoo ,  Tae-Kyung Kim

发明人： Chang-Jin Yang ,  Pyong-Yong Seong ,  Seong-Sin Joo ,  Soo-Yul Jung ,  Jung-Eon Seo ,  Yong-Jae Lee ,  Jang-Hoon Yoo ,  Tae-Kyung Kim

IPC分类号： G11B17221

CPC分类号： G11B27/24 ,  G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B19/04 ,  G11B20/18 ,  G11B27/3027 ,  G11B2220/216 ,  G11B2220/2575

摘要： A DVD-RAM disk reproduction apparatus for reducing an error during detection of ID data, which includes a first operational amplifier for obtaining a sum signal resulting from the addition of four picked-up signals picked up by divided-by-four photodiodes from a DVD-RAM disk having a header region and a recording region, second and third operational amplifiers for respectively obtaining two sum signals corresponding to the upper and lower regions of the header region resulting from the addition of the first and second picked-up signals and the third and fourth picked-up signals, respectively, a fourth operational amplifier for obtaining a difference signal between the two sum signals, a header region detector for detecting upper and lower header region signals corresponding to the upper header region and the lower header region based on the difference signal, and detecting a header region signal corresponding to a header region by logically summing the two detected signals, a first multiplexer for selecting one of the two sum signals obtained by the second and third operational amplifiers according to the upper header region signal, and a second multiplexer for selecting the sum signal selected by the first operational amplifier and the sum signal selected by the first multiplexer according to the header region signal, to thereby output the selected result to an equalizer. Thus, during detection of ID data in a header region, a difference signal between the picked-up four signals is not used, but a signal resulting from the addition of two signals among the picked-up signals according to the corresponding upper and lower regions of the header region is selectively used. Accordingly, ID data can be detected from a signal without deterioration, to thereby reduce an error and thus improve a detection margin.

摘要翻译： 一种用于在ID数据检测期间减少误差的DVD-RAM盘再现装置，其包括第一运算放大器，用于获得由DVD的四分之一光电二极管拾取的四个拾取信号的相加而得到的和信号 -RAM盘，具有标题区域和记录区域，第二和第三运算放大器，用于分别获得对应于由所述第一和第二拾取信号的相加产生的标题区域的上部和下部区域的两个和信号，以及第三个 和第四拾取信号，分别用于获得两个和信号之间的差分信号的第四运算放大器，用于检测对应于上标题区域和下标题区域的上标题区域信号和下标头区域信号的标题区域检测器， 差分信号，并且通过对两个检测到的信号进行逻辑求和来检测与标题区域相对应的标题区域信号，第一个mul 层叠器，用于根据上标头区域信号选择由第二和第三运算放大器获得的两个和信号之一;以及第二多路复用器，用于选择由第一运算放大器选择的和信号和由第一多路复用器选择的和信号， 到标题区域信号，从而将所选择的结果输出到均衡器。 因此，在标题区域中的ID数据的检测期间，不使用拾取的四个信号之间的差分信号，而是根据相应的上部和下部区域在拾取信号之间添加两个信号而产生的信号 选择使用标题区域。 因此，可以从信号中检测ID数据而不劣化，从而减少误差，从而提高检测余量。