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71. 发明申请

US20070041287A1 Optical pickup apparatus capable of detecting and compensating for spherical aberration caused by thickness variation of recording layer 审中-公开
标题翻译：能够检测和补偿由记录层的厚度变化引起的球面像差的光学拾取装置
公开(公告)号：US20070041287A1
公开(公告)日：2007-02-22
申请号：US11496522
申请日：2006-08-01
申请人： Tao Hong , Tae-kyung Kim , Woo-seok Choi , Chong-sam Chung
发明人： Tao Hong , Tae-kyung Kim , Woo-seok Choi , Chong-sam Chung
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0943 , G11B7/131 , G11B7/13927
摘要： 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.
摘要翻译：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。

72. 发明授权

US07120095B2 Apparatus for generating seek direction detecting signal using track error and track cross signals for an optical pickup 有权
标题翻译：用于使用轨道误差产生寻道方向检测信号并跟踪光学拾取器的交叉信号的装置
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。

73. 发明申请

US20060203680A1 Multilayer recording medium and method of manufacturing the same 失效
公开(公告)号：US20060203680A1
公开(公告)日：2006-09-14
申请号：US11290593
申请日：2005-12-01
申请人： Tao Hong , Chong-sam Chung , Tae-kyung Kim , Woo-seok Choi
发明人： Tao Hong , Chong-sam Chung , Tae-kyung Kim , Woo-seok Choi
IPC分类号： G11B7/20
CPC分类号： G11B7/26 , G11B7/24038 , G11B7/268
摘要： 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.

74. 发明授权

US07079471B1 OPTICAL PICKUP USING TWO LASER BEAM SOURCES OF DIFFERENT WAVELENGTHS FOR AN OPTICAL DISK DRIVE AND A CONVERTER TO OPTIMIZE A LIGHT BEAM REFLECTED OFF AN OPTICAL DISC FOR DETECTION BASED ON REFLECTED LIGHT BEAM WAVELENGTH 失效
标题翻译：光学拾取使用两个不同波长的激光束光源，用于光盘驱动器和转换器，以根据反射的光束波长优化用于检测光源的光束。
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。

75. 发明申请

US20060092789A1 Method for detecting servo error, apparatus therefor, disk which maintains quality of servo error signal, method of controlling servo of disk recording/reproducing apparatus, method of detecting tracking error, and method of detecting tilt error 有权
标题翻译：用于检测伺服误差的方法，其装置，保持伺服误差信号质量的盘，控制盘记录/重放装置伺服的方法，检测跟踪误差的方法以及检测倾斜误差的方法
公开(公告)号：US20060092789A1
公开(公告)日：2006-05-04
申请号：US11304636
申请日：2005-12-16
申请人： Seong-sin Joo , In-sik Park , Byung-in Ma , Chong-sam Chung , Jang-hoon Yoo , Jung-wan Ko , Kyung-geun Lee , Joong-eon Seo
发明人： 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分类号： G11B7/00
CPC分类号： G11B7/00718 , G11B7/0901 , G11B7/0938 , G11B7/0941 , G11B7/0956
摘要： 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.
摘要翻译：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。

76. 发明授权

US07020051B2 Optical pickup capable of detecting and/or compensating for spherical aberration 失效
公开(公告)号：US07020051B2
公开(公告)日：2006-03-28
申请号：US09984886
申请日：2001-10-31
申请人： Tae-kyung Kim , Young-man Ahn , Hae-jung Suh , Chong-sam Chung
发明人： Tae-kyung Kim , Young-man Ahn , Hae-jung Suh , Chong-sam Chung
IPC分类号： G11B7/095 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/007 , G11B7/00718 , G11B7/131 , G11B7/1369 , G11B7/1381 , G11B7/13927
摘要： 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.

77. 发明授权

US06961292B2 Apparatus generating a seek direction detecting signal for an optical pickup using track cross and track error signals 失效
标题翻译：用于使用轨道交叉和轨道误差信号产生用于光学拾取器的寻道方向检测信号的装置
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。

78. 发明申请

US20050152240A1 Error signal detection apparatus and method for optical recording/reproducing system 失效
标题翻译：用于光学记录/再现系统的误差信号检测装置和方法
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。

79. 发明授权

US06853614B2 Aberration correction element and optical pickup adopting the same 失效
标题翻译：畸变校正元件和采用相同的光学拾取器
公开(公告)号：US06853614B2
公开(公告)日：2005-02-08
申请号：US09822847
申请日：2001-04-02
申请人： Tae-kyung Kim , Young-man Ahn , Chong-sam Chung , Hea-jung Suh
发明人： Tae-kyung Kim , Young-man Ahn , Chong-sam Chung , Hea-jung Suh
IPC分类号： G11B7/12 , G02B5/30 , G11B7/00 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1275 , G02B5/3083 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： An optical pickup includes an aberration correction element to correct chromatic aberration caused by variation of power from a light source when changing between operating modes in a recording medium. The aberration correction includes a first retardation member, which includes a stepped convex pattern with a plurality of steps at one side, and a second retardation member combined with the first retardation member. The second retardation member includes a stepped concave pattern with a plurality of steps at one side facing the first retardation member, the stepped concave pattern corresponding to the stepped convex pattern. The first and the second retardation members include different refractive indices for a light beam, which allows the first and the second retardation members to selectively create a phase difference of an incident light beam according to a polarization of the incident light beam.
摘要翻译：光拾取器包括像差校正元件，用于在记录介质中在操作模式之间进行变化时，校正由光源产生的功率变化引起的色差。像差校正包括第一延迟构件，其包括在一侧具有多个台阶的阶梯凸形图案和与第一延迟构件组合的第二延迟构件。第二延迟构件包括在面向第一延迟构件的一侧具有多个台阶的阶梯式凹形图案，阶梯形凹形图案对应于阶梯状凸起图案。第一和第二延迟构件包括不同于光束的折射率，这允许第一和第二延迟构件根据入射光束的偏振选择性地产生入射光束的相位差。

80. 发明授权

US06798731B1 Optical pickup for and method of correcting aberration due to thickness variations of optical media 有权
标题翻译：光学拾取器以及由于光学介质的厚度变化而校正像差的方法
公开(公告)号：US06798731B1
公开(公告)日：2004-09-28
申请号：US09711949
申请日：2000-11-15
申请人： Tae-kyung Kim , Chong-sam Chung , Young-man Ahn , Hea-jung Suh
发明人： Tae-kyung Kim , Chong-sam Chung , Young-man Ahn , Hea-jung Suh
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/005 , G11B7/0948 , G11B7/0956 , G11B7/13927
摘要： An optical pickup apparatus for compensating for the deviation in the thickness of the optical disk and method therefor. The optical pickup includes a light source which emits light, an optical path changer which changes a proceeding path of incident light, an objective lens which focuses incident light to form a light spot on an optical disk, a light splitter, provided on the optical path between the light source and the optical path changer, which splits incident light into at least two light beams including first and second light beams so that at least two light spots including a main light spot having no aberration and an auxiliary light spot having a predetermined spherical aberration are formed on the optical disk, a photodetector including first and second light receiving portions which respectively receive the first and second incident light beams reflected by the optical disk and passing through the optical path changer, and a signal processing portion, including a delay which delays the phase of a second signal in order to synchronize a first signal and the second signal which are detected and optoelectrically converted by the first and second light receiving portions, to compensate for the deviation in the thickness of the optical disk.
摘要翻译：一种补偿光盘厚度偏差的光拾取装置及其方法。光拾取器包括发光的光源，改变入射光的行进路径的光路改变器，将入射光聚焦以在光盘上形成光点的物镜，设置在光路上的光分离器在光源和光路改变器之间，其将入射光分成包括第一和第二光束的至少两个光束，使得包括不具有像差的主光点和具有预定球面的辅助光点的至少两个光点在光盘上形成像差，包括分别接收由光盘反射并通过光路改变器的第一和第二入射光束的第一和第二光接收部分的光电检测器，以及包括延迟的信号处理部分延迟第二信号的相位，以便使检测到的第一信号和第二信号同步由第一和第二光接收部分光电转换，以补偿光盘厚度的偏差。

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