公开(公告)号：US07120095B2

公开(公告)日：2006-10-10

申请号：US09815345

申请日：2001-03-23

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

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

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/00718 ,  G11B7/0903

摘要： 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.

摘要翻译： 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：US07079471B1

公开(公告)日：2006-07-18

申请号：US09442095

申请日：1999-11-17

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

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

IPC分类号： G11B7/135

CPC分类号： G11B7/1376 ,  G11B7/1353 ,  G11B2007/0006

摘要： 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.

摘要翻译： 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：US06961292B2

公开(公告)日：2005-11-01

申请号：US09817754

申请日：2001-03-27

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

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

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

CPC分类号： G11B7/131 ,  G11B7/08505 ,  G11B7/0943 ,  G11B7/133 ,  G11B7/1353

摘要： 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.

摘要翻译： 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：US20050152240A1

公开(公告)日：2005-07-14

申请号：US11079109

申请日：2005-03-15

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

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

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

CPC分类号： G11B7/131 ,  G11B7/0956

摘要： 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.

摘要翻译： 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。

公开(公告)号：US06687201B2

公开(公告)日：2004-02-03

申请号：US09846264

申请日：2001-05-02

申请人： Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh ,  Jin-hoon Jeon

发明人： Byung-in Ma ,  Chong-sam Chung ,  In-sik Park ,  Byoung-ho Choi ,  Tae-yong Doh ,  Jin-hoon Jeon

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G11B7/00718 ,  G11B7/08505 ,  G11B7/0903 ,  G11B7/0943 ,  G11B7/0956 ,  G11B7/131 ,  G11B7/13922 ,  G11B7/1398

摘要： An apparatus for use in an optical disc includes an optical disc and an optical branching unit irradiating a main light beam and a sub-light beam, wherein the sub-light beam includes a optical aberration in a direction on a track of the optical disc. The apparatus further includes a photodetector including a plurality of portions receiving and processing the main light beam and a plurality of portions receiving and processing the sub-light beam. A track error signal detector detects a track error signal from the portions receiving the main light beam. A track cross signal detector detects a track cross signal from the portions receiving the main light beam and from the portions receiving the sub-light beam. A signal processor further compares the track error signal with the track cross signal to detect the seek direction of a light spot formed on the optical disc.

摘要翻译： 用于光盘的装置包括光盘和照射主光束和副光束的光分支单元，其中副光束包括在光盘的轨道上的方向上的光学像差。 该装置还包括一个光电检测器，它包括接收和处理主光束的多个部分和接收和处理子光束的多个部分。 轨道误差信号检测器从接收主光束的部分检测轨道误差信号。 轨道交叉信号检测器检测来自接收主光束的部分和接收子光束的部分的轨道交叉信号。 信号处理器还将轨道误差信号与轨道交叉信号进行比较，以检测形成在光盘上的光点的寻道方向。

公开(公告)号：US07170834B2

公开(公告)日：2007-01-30

申请号：US10861404

申请日：2004-06-07

申请人： Tatsuhiro Otsuka ,  Seong-sin Joo ,  Chong-sam Chung ,  Young-man Ahn ,  In-sik Park ,  Hea-jung Suh ,  Byung-in Ma ,  Byoung-ho Choi

发明人： Tatsuhiro Otsuka ,  Seong-sin Joo ,  Chong-sam Chung ,  Young-man Ahn ,  In-sik Park ,  Hea-jung Suh ,  Byung-in Ma ,  Byoung-ho Choi

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B7/005

摘要： A method of and a circuit for providing a playback signal, which is compensated for time delay, from a photodetector having a plurality of outputs. A time difference between a first signal corresponding to a part of the outputs of the photodetector and a second signal corresponding to another part of the outputs of the photodetector is detected and one of the first and second signals is temporally shifted to compensate for a time delay between different outputs of the photodetector. The temporally shifted signal is summed with the other signal to provide a playback signal. Accordingly, the time delay between the outputs of the photodetector is compensated, thereby increasing the degree of modulation of the data playback signal. In addition, distortion or degradation of the signal is suppressed and occurrence of errors in the playback signal is minimized, thereby improving the reliability of the playback signal.

摘要翻译： 一种用于从具有多个输出的光电检测器提供补偿时间延迟的重放信号的方法和电路。 检测对应于光电检测器的输出的一部分的第一信号与对应于光电检测器的输出的另一部分的第二信号之间的时间差，并且第一和第二信号中的一个被时间偏移以补偿时间延迟 在光电检测器的不同输出之间。 时间偏移的信号与另一个信号相加以提供重放信号。 因此，补偿了光检测器的输出之间的时间延迟，从而增加了数据重放信号的调制度。 此外，抑制了信号的失真或劣化，并且重放信号中的错误的发生被最小化，从而提高了重放信号的可靠性。

公开(公告)号：US06885621B2

公开(公告)日：2005-04-26

申请号：US09844697

申请日：2001-04-30

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

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

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

CPC分类号： G11B7/131 ,  G11B7/0956

摘要： An error signal detection method and apparatus for an optical recording/reproducing system. The error signal detection method includes: (a) detecting light incident through an objective lens after having been reflected and diffracted from a recording medium, as eight light portions arranged in a 2×4 matrix, including four inner light portions, and four outer light portions around the corresponding inner light portions, wherein the rows and columns of the matrix are parallel to the tangential and radial direction of the recording medium, respectively; (b) 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; (c) 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 (d) comparing phases of the first and second sum signals and outputting a phase comparison signal, wherein a tilt error signal is detected from the phase comparison signal. The tilt error signal detected using the method by the error signal detection apparatus has a high signal-to-noise ratio, and is less affected by detracting.

摘要翻译： 一种用于光学记录/再现系统的误差信号检测方法和装置。 误差信号检测方法包括：（a）在从记录介质反射和衍射之后检测通过物镜入射的光，作为布置在2x4矩阵中的八个光部分，包括四个内部光部分和四个外部光部分 相应的内部光线部分，其中矩阵的行和列分别平行于记录介质的切向和径向方向; （b）通过将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位于第二对角线方向的内部光部分的检测信号相加来计算第一和信号; （c）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求和来计算第二和信号; 以及（d）比较第一和第二和信号的相位并输出相位比较信号，其中从相位比较信号检测倾斜误差信号。 使用误差信号检测装置的方法检测的倾斜误差信号具有高的信噪比，并且受到减小的影响较小。

公开(公告)号：US06611482B2

公开(公告)日：2003-08-26

申请号：US09812714

申请日：2001-03-22

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

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

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/00718 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0956

摘要： An error signal detecting apparatus for an optical recording/reproducing apparatus, the error signal detecting apparatus including a photodetector to receive light reflected and diffracted by a recording medium, and a signal processor to detect an error signal by calculating a detection signal of the photodetector. The photodetector includes a plurality of light receiving areas to independently receive light of a light area in which the profile of the light changes to the opposite profile according to the tangential tilt of the recording medium. The signal processor detects a tangential tilt error signal from detection signals of the light receiving areas. Thus, a signal output from the error signal detecting apparatus does not change when a shift is generated in the objective lens or the distance between the objective lens and the disc is deviated from the on-focus position. Also, a change in the profile of the light beam according to a relative tangential tilt with respect to the objective lens of a recording medium in land/groove format can be properly detected so that an accurate tangential tilt error signal can be detected.

摘要翻译： 一种用于光学记录/再现装置的误差信号检测装置，所述误差信号检测装置包括用于接收由记录介质反射和衍射的光的光电检测器，以及通过计算所述光电检测器的检测信号来检测误差信号的信号处理器。 光电检测器包括多个光接收区域，以独立地接收光区域的光，其中光的轮廓根据记录介质的切线倾斜而改变到相反的轮廓。 信号处理器从光接收区域的检测信号检测切向倾斜误差信号。 因此，当在物镜中产生偏移或物镜与盘之间的距离偏离对焦位置时，从误差信号检测装置输出的信号不改变。 此外，可以适当地检测根据相对于陆地/凹槽格式的记录介质的物镜的相对切向倾斜的光束轮廓的变化，从而可以检测出精确的切向倾斜误差信号。

公开(公告)号：US20070086256A1

公开(公告)日：2007-04-19

申请号：US11580930

申请日：2006-10-16

申请人： Jung-wan Ko ,  Chong-sam Chung ,  In-sik Park

发明人： Jung-wan Ko ,  Chong-sam Chung ,  In-sik Park

IPC分类号： G11C13/04

CPC分类号： G11B7/0065 ,  G11B7/0033 ,  G11B7/24012

摘要： An optical memory includes a substrate and an optical recording layer embedded in a part of the substrate. At least an upper area of the substrate where the optical recording layer is embedded is transparent, and the optical recording layer has a size to read out data recorded in the optical recording layer without using a feeding operation of an objective lens optical system.

摘要翻译： 光学存储器包括衬底和嵌入在衬底的一部分中的光记录层。 至少嵌入光记录层的基板的上部区域是透明的，并且光学记录层具有读取记录在光学记录层中的数据的尺寸，而不使用物镜光学系统的进给操作。

公开(公告)号：US07095686B2

公开(公告)日：2006-08-22

申请号：US10839353

申请日：2004-05-06

申请人： Byung-in Ma ,  In-sik Park ,  Chong-sam Chung ,  Jin-hoon Jeon ,  Tae-yong Doh ,  Byoung-ho Choi

发明人： Byung-in Ma ,  In-sik Park ,  Chong-sam Chung ,  Jin-hoon Jeon ,  Tae-yong Doh ,  Byoung-ho Choi

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0956

摘要： An error signal detection apparatus for an optical recording/reproducing system including a light source emitting a light beam and an objective lens focusing the light beam to form a light spot on a recording medium, the apparatus including: a photodetecting unit dividing at least a part of the light beam passed through the objective lens after being reflected/diffracted from an information stream of the recording medium into light beam portions, and detecting the light beam portions; and a signal processor detecting phase differences between detection signals from the light beam portions to detect a tangential error signal, a defocus error signal, and/or a radial tilt error signal.

摘要翻译： 一种用于光学记录/再现系统的误差信号检测装置，包括发射光束的光源和聚焦光束以在记录介质上形成光点的物镜，该装置包括：光电检测单元，将至少一部分 在从记录介质的信息流反射/衍射之后通过物镜的光束变成光束部分，并且检测光束部分; 以及信号处理器，检测来自光束部分的检测信号之间的相位差，以检测切向误差信号，散焦误差信号和/或径向倾斜误差信号。