公开(公告)号：US20070041287A1

公开(公告)日：2007-02-22

申请号：US11496522

申请日：2006-08-01

Applicant: Tao Hong ,  Tae-kyung Kim ,  Woo-seok Choi ,  Chong-sam Chung

Inventor： Tao Hong ,  Tae-kyung Kim ,  Woo-seok Choi ,  Chong-sam Chung

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/13927

Abstract: An optical pickup apparatus, including a light source to emit light, an objective lens to form a light spot on an optical recording medium by focusing the light emitted from the light source, an optical division unit, disposed between the light source and the objective lens, to divide the light emitted from the light source into a main beam and two subbeams to form one main spot and two subspots on the optical recording medium, the optical division unit having a first area and a second area surrounding the first area, a detector to detect the amount of light of the main beam and the amount of light of the respective subbeams reflected from the optical recording medium, a beam splitter disposed between the light source and the objective lens to allow the light reflected from the optical recording medium to be directed to the detector, signal generating circuits to generate a tracking error signal (TES), a focusing error signal (FES), and a spherical aberration signal (SAS), respectively, in response to the output of the detector, and a spherical aberration compensation unit, disposed between the objective lens and the beam splitter, to compensate for spherical aberration using the SAS generated by the signal generating circuits.

Abstract translation: 一种光拾取装置，包括用于发光的光源，通过聚焦从光源发射的光在光学记录介质上形成光斑的物镜，设置在光源和物镜之间的光学分割单元 为了将从光源发射的光分成主光束和两个子光束，以在光记录介质上形成一个主光点和两个子光点，光分割单元具有第一区域和围绕第一区域的第二区域，检测器 检测主光束的光量和从光记录介质反射的各子束的光量，设置在光源和物镜之间的分束器，以允许从光记录介质反射的光为 指向检测器，信号发生电路分别产生跟踪误差信号（TES），聚焦误差信号（FES）和球面像差信号（SAS） ，并且配置在物镜和分束器之间的球面像差补偿单元，以使用由信号发生电路产生的SAS补偿球面像差。

公开(公告)号：US07149176B2

公开(公告)日：2006-12-12

申请号：US10268076

申请日：2002-10-10

Applicant: Yong-hoon Lee ,  Han-kook Choi ,  Seok-jung Kim ,  In-sik Park ,  Chong-sam Chung

Inventor： Yong-hoon Lee ,  Han-kook Choi ,  Seok-jung Kim ,  In-sik Park ,  Chong-sam Chung

IPC: G11B7/24

CPC classification number: G11B7/24 ,  G11B7/007

Abstract: A compact high-density optical disc capable of securing recording/reproducing characteristics and high-density recording capacity. The high-density optical disc has a whole diameter of 80 mm or less to 28 mm, a whole thickness in a range of 0.3–0.7 mm, and a position where data starts being recorded in a range of 27–45 mm of the diameter. Thus, an existing disc drive can be used, the size of the high-density optical disc can be reduced, and high-density recording capacity can be secured.

公开(公告)号：US07120095B2

公开(公告)日：2006-10-10

申请号：US09815345

申请日：2001-03-23

Applicant: Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh

Inventor： Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh

IPC: G11B7/00

CPC classification number: G11B7/131 ,  G11B7/00718 ,  G11B7/0903

Abstract: An apparatus to generate a seek direction detecting signal for an optical pickup to determine a position of a center of an optical spot focused on an optical disk relative to a center of a track, which focuses a main beam on a first optical detector and a sub-beam having a predetermined aberration in a radial direction on a second optical detector using a light dividing unit. The second optical detector has an inner and an outer pair of light receiving portions arranged along the radial direction, the inner pair being between the outer pair. A signal processing portion includes a first signal processing portion to detect a track error signal from signals output from the first optical detector, and a second signal processing portion to generate the seek direction detecting signal from signals detected by the second optical detector and the track error signal.

Abstract translation: 一种用于产生用于光学拾取器的寻道方向检测信号以确定聚焦在光盘上的相对于轨道中心的光点的中心的位置的装置，其将主光束聚焦在第一光学检测器和子光束上 光束在使用光分离单元的第二光学检测器上具有在径向方向上的预定像差。 第二光学检测器具有沿着径向布置的内部和外部一对光接收部分，内侧对在外侧对之间。 信号处理部分包括：第一信号处理部分，用于从第一光学检测器输出的信号中检测轨道误差信号;以及第二信号处理部分，用于从由第二光学检测器检测的信号和轨道误差产生寻道方向检测信号 信号。

公开(公告)号：US20060203680A1

公开(公告)日：2006-09-14

申请号：US11290593

申请日：2005-12-01

Applicant: Tao Hong ,  Chong-sam Chung ,  Tae-kyung Kim ,  Woo-seok Choi

Inventor： Tao Hong ,  Chong-sam Chung ,  Tae-kyung Kim ,  Woo-seok Choi

IPC: G11B7/20

CPC classification number: G11B7/26 ,  G11B7/24038 ,  G11B7/268

Abstract: A multilayer recording medium that prevents deterioration of a signal characteristic due to a mirror effect that may occur between recording layers and a method of manufacturing the same, the multilayer recording medium having at least two recording layers, wherein a thickness of at least one spacer layer between adjacent recording layers is different from a thickness of the other spacer layers such that a beam focusing on a recording layer is prevented from focusing on another recording layer corresponding to a mirror layer due to reflection. In the multilayer recording medium, a mirror effect is greatly reduced. In addition, the thickness of only a spacer layer exerting the most significant influence on the mirror effect is changed to prevent the deterioration of signal quality due to the mirror effect, and therefore, the structure of a multilayer recording medium is simplified.

公开(公告)号：US07079471B1

公开(公告)日：2006-07-18

申请号：US09442095

申请日：1999-11-17

Applicant: Chong-sam Chung ,  Chul-woo Lee ,  In-sik Park

Inventor： Chong-sam Chung ,  Chul-woo Lee ,  In-sik Park

IPC: G11B7/135

CPC classification number: G11B7/1376 ,  G11B7/1353 ,  G11B2007/0006

Abstract: First and second laser beam sources generate first and second laser beams of different wavelengths, respectively. A first collimating lens diverges the first laser beam at a predetermined angle so as to permit a fracture surface aberration of the first laser beam to fall below a predetermined value when the first laser beam generated from the first laser beam source is collected on the signal layer of the optical disk. A light receiving lens collects the laser beam reflected from the signal layer of the optical disk on a photo diode in the form of an optical spot of a predetermined size. A holographic lens has a pattern by which the first laser beam is converted into parallel rays so that the size of a spot of the first laser beam becomes identical with the size of a spot of the second laser beam as projected on the detecting section. The pattern of the holographic lens has a concentric annular concave-convex portion in which a plurality of annular prominences and depressions are arranged, and the depression and the prominence have a width which is gradually decreased from a center toward a most outer circumference of the concentric annular concave-convex portion. Further, an inner surface of each prominence has a step-like shape formed with at least one step. Preferably, the number of the step ranges from three to five. Accordingly, diameters of the optical spots of the two laser beams of different wavelengths are almost identical when the laser beams are transmitted through the holographic lens so that the optical spots are formed on the photo diode. As a result, with one objective lens and photo diode, information of two types of optical disks for laser beams of different wave lengths can be reproduced.

Abstract translation: 第一和第二激光束源分别产生不同波长的第一和第二激光束。 第一准直透镜将第一激光束以预定角度分开，以便当从第一激光束源产生的第一激光束收集在信号层上时，允许第一激光束的断裂表面像差降至预定值以下 的光盘。 光接收透镜以预定尺寸的光点的形式收集从光盘的信号层反射的光电二极管上的激光束。 全息透​​镜具有将第一激光束转换为平行光线的图案，使得第一激光束的光斑的尺寸与投影在检测部上的第二激光束的光斑尺寸相同。 全息透​​镜的图案具有同心环状的凹凸部，在该同心环状的凹凸部中配置有多个环状突起和凹部，凹部和凸部的宽度从同心的中心向最外周逐渐减小 环形凹凸部。 此外，每个凸起的内表面具有形成有至少一个台阶的台阶状。 优选地，步数为3至5。 因此，当激光束透射通过全息透镜时，两个不同波长的激光束的光点的直径几乎相同，使得光斑形成在光电二极管上。 结果，利用一个物镜和光电二极管，可以再现不同波长的激光束的两种类型的光盘的信息。

公开(公告)号：US20060092789A1

公开(公告)日：2006-05-04

申请号：US11304636

申请日：2005-12-16

Applicant: Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

Inventor： Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

IPC: G11B7/00

CPC classification number: G11B7/00718 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0956

Abstract: An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull signal RF_pp from an optical signal reflected from the disk, a header area detector for generating a header area signal including a header area from the reproducing signal, a first synchronous signal level detector for detecting a magnitude Ivfo1 of a first synchronous signal in the first header by being synchronized with the header area signal, a second synchronous signal level detector for detecting a magnitude Ivfo3 of a second synchronous signal in the second header by being synchronized with the header area signal, and a balance calculator for calculating the balance of the magnitude Ivfo1 and the magnitude Ivfo3.

Abstract translation: 一种用于在盘中将数据记录在数据上并将数据从记录区划分成多个扇区的装置，包括一个再现信号发生器，用于产生包括径向对的和信号V 1和V 2的再现信号，和信号RF_sum和 来自从盘反射的光信号的推挽信号RF_pp，用于产生包含来自再现信号的标题区的标题区信号的报头区检测器，用于检测第一同步信号的幅度Ivfo1的第一同步信号电平检测器 信号通过与标题区域信号同步在第一标题中;第二同步信号电平检测器，用于通过与标题区域信号同步来检测第二标题中的第二同步信号的幅度Ivfo 3;以及用于计算的平衡计算器 幅度Ivfo 1和幅度Ivfo 3的平衡。

公开(公告)号：US07020051B2

公开(公告)日：2006-03-28

申请号：US09984886

申请日：2001-10-31

Applicant: Tae-kyung Kim ,  Young-man Ahn ,  Hae-jung Suh ,  Chong-sam Chung

Inventor： Tae-kyung Kim ,  Young-man Ahn ,  Hae-jung Suh ,  Chong-sam Chung

IPC: G11B7/095 ,  G11B7/135

CPC classification number: G11B7/1353 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/131 ,  G11B7/1369 ,  G11B7/1381 ,  G11B7/13927

Abstract: An optical pickup is provided for a recording medium, including: a light source generating and emitting a light beam; a light beam division and detection unit dividing a particular light beam portion of the light beam after being reflected/diffracted from the recording medium into sub-divided light beams portions, and detecting the sub-divided light beam portions; and a spherical aberration detection circuit processing the sub-divided light beam portions to detect spherical aberration caused by thickness variation of the recording medium.

公开(公告)号：US06961292B2

公开(公告)日：2005-11-01

申请号：US09817754

申请日：2001-03-27

Applicant: Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh

Inventor： Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh

IPC: G11B7/135 ,  G11B7/085 ,  G11B7/09 ,  G11B7/13

CPC classification number: G11B7/131 ,  G11B7/08505 ,  G11B7/0943 ,  G11B7/133 ,  G11B7/1353

Abstract: An apparatus generating a seek direction detecting signal includes a light dividing unit dividing an incident light beam into at least two beams having a main beam and a sub-beam so that at least two beam spots including a main beam spot and at least one sub-beam spot having an optical aberration, can be focused in the track direction of an optical disk, the light dividing unit providing that the direction of the optical aberration of the sub-beam spot can be the tangential direction of the optical disk, an optical detector unit, a first signal processing portion processing a track error signal from signals output from the optical detector, a second signal processing portion processing a track cross signal from the signals output from the optical detector, and a generator generating the seek direction detecting signal from the phase difference between the track cross signal and the track error signal.

Abstract translation: 产生搜索方向检测信号的装置包括：光分离单元，将入射光束分成至少两束具有主光束和子光束的光束，使得至少两个光束点包括主光束斑点和至少一个子光束点， 具有光学像差的光束点可以在光盘的轨道方向上聚焦，所述光分割单元使得子光束点的光学像差的方向可以是光盘的切线方向，光学检测器 单元，第一信号处理部分，从光检测器输出的信号处理轨道误差信号;第二信号处理部分，处理来自光检测器输出的信号的轨道交叉信号;以及发生器，其生成来自所述光检测器的寻道方向检测信号 轨道交叉信号和轨道误差信号之间的相位差。

公开(公告)号：US20050169162A1

公开(公告)日：2005-08-04

申请号：US11092761

申请日：2005-03-30

Applicant: Yong-Hoon Lee ,  Chul-Woo Lee ,  Chong-Sam Chung ,  Kun-Ho Cho

Inventor： Yong-Hoon Lee ,  Chul-Woo Lee ,  Chong-Sam Chung ,  Kun-Ho Cho

IPC: G11B7/24 ,  G11B7/007 ,  G11B7/09 ,  G11B7/26 ,  G11B11/105

CPC classification number: B82Y10/00 ,  G11B7/007 ,  G11B7/0938 ,  G11B7/263 ,  G11B11/10584 ,  Y10T428/21

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20050152240A1

公开(公告)日：2005-07-14

申请号：US11079109

申请日：2005-03-15

Applicant: Byung-in Ma ,  Byoung-ho Choi ,  Chong-sam Chung ,  In-sik Park ,  Tae-yong Doh

Inventor： Byung-in Ma ,  Byoung-ho Choi ,  Chong-sam Chung ,  In-sik Park ,  Tae-yong Doh

IPC: G11B7/095 ,  G11B7/13 ,  G11B7/00

CPC classification number: G11B7/131 ,  G11B7/0956

Abstract: An error signal detection method includes detecting light incident through an objective lens after having been reflected and diffracted from a recording medium, as eight light portions in a matrix including four inner light portions and four outer light portions, wherein the rows and columns of the matrix are parallel to the tangential and radial direction of the recording medium, respectively; calculating a first sum signal by summing a detection signal from at least one outer light portion located in a first diagonal direction, and a detection signal from an inner light portion located in a second diagonal direction; calculating second sum signal by summing a detection signal from an inner light portion located in the first diagonal direction, and a detection signal from an outer light portion located in the second diagonal direction; and comparing phases of the first and second sum signals to detect a tilt error signal.

Abstract translation: 误差信号检测方法包括检测从记录介质反射和衍射之后通过物镜入射的光，作为包括四个内部光部分和四个外部光部分的矩阵中的八个光部分，其中矩阵的行和列 分别与记录介质的切向和径向方向平行; 通过对来自位于第一对角线方向的至少一个外部光部分的检测信号和来自位于第二对角线方向的内部光部分的检测信号求和来计算第一和信号; 通过对来自位于第一对角线方向的内部光部分的检测信号和来自位于第二对角线方向的外部光部分的检测信号进行求和来计算第二和信号; 以及比较第一和第二和信号的相位以检测倾斜误差信号。