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81. 发明授权

US07324424B2 Compatible optical pickup having diffractive device to correct chromatism and divergent lens to increase working distance 失效
$Compatible optical pickup having diffractive device to correct chromatism and divergent lens to increase working distance$
标题翻译：兼容的光学拾取器具有衍射装置以校正色差和发散透镜以增加工作距离
公开(公告)号：US07324424B2
公开(公告)日：2008-01-29
申请号：US10295044
申请日：2002-11-15
申请人： Tae-kyung Kim , Young-man Ahn , Chong-sam Chung , Hae-jung Suh , Jin-kyung Lee , Jong-bae Kim
发明人： Tae-kyung Kim , Young-man Ahn , Chong-sam Chung , Hae-jung Suh , Jin-kyung Lee , Jong-bae Kim
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/127 , G11B7/1367 , G11B7/1376 , G11B7/139 , G11B7/13922 , G11B2007/0006
摘要： A compatible optical pickup includes an optical disc, an objective lens, a diffractive device, and a divergent lens. The optical unit emits a short wavelength light beam corresponding to a high density optical disc and a long wavelength light beam corresponding to a low density optical disc. The objective lens forms a light spot on the high density optical disc and the low density optical disc and the diffractive device diffracts the short wavelength light beam to correct chromatism according to a change in a wavelength of the short wavelength light beam. The divergent lens refracts the long wavelength light beam toward the objective lens to increase a working distance with respect to the low density optical disc.
摘要翻译：兼容的光学拾取器包括光盘，物镜，衍射装置和发散透镜。光学单元发射对应于高密度光盘的短波长光束和对应于低密度光盘的长波长光束。物镜在高密度光盘上形成光点，低密度光盘和衍射装置衍射短波长光束，以根据短波长光束的波长变化校正色差。发散透镜将长波长光束折射到物镜以增加相对于低密度光盘的工作距离。

82. 发明授权

US07298675B2 Multilayer recording medium and optical pickup for recording and/or reproducing the same 失效
标题翻译：用于记录和/或再现的多层记录介质和光学拾取器
公开(公告)号：US07298675B2
公开(公告)日：2007-11-20
申请号：US11227912
申请日：2005-09-16
申请人： Tao Hong , Tae-kyung Kim , Chong-sam Chung
发明人： Tao Hong , Tae-kyung Kim , Chong-sam Chung
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/131 , G11B2007/0013
摘要： An optical pickup for recording and/or reproducing data with respect to a multilayer recording medium having a plurality of recording layers, where the optical pickup includes a light source emitting a beam having a predetermined wavelength, a diffraction unit separating the beam emitted from the light source into a main beam and a sub-beam, and a photodetector having a main photodetector detecting a main beam reflected from the multilayer recording medium and a sub-photodetector detecting the sub-beam. In the optical pickup, the main photodetector and sub-photodetector are separated a predetermined distance from each other so that a beam spot formed by the beam reflected from a defocus recording layer is not detected by the sub-photodetector.
摘要翻译：一种用于相对于具有多个记录层的多层记录介质记录和/或再现数据的光学拾取器，其中光学拾取器包括发射具有预定波长的光束的光源，将从光发射的光束分离的衍射单元源到主光束和子光束，以及光检测器，其具有检测从多层记录介质反射的主光束的主光电检测器和检测子光束的子光电检测器。在光学拾取器中，主光电检测器和副光电检测器彼此隔开预定距离，使得由离焦记录层反射的光束形成的光束点不被副光电检测器检测。

83. 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。

84. 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.

85. 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.

86. 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。

87. 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。

88. 发明授权

US06788645B2 Disk cartridge 失效
标题翻译：磁盘盒
公开(公告)号：US06788645B2
公开(公告)日：2004-09-07
申请号：US10077959
申请日：2002-02-20
申请人： Han-kook Choi , Yong-hoon Lee , Chong-sam Chung , Heui-jong Kang
发明人： Han-kook Choi , Yong-hoon Lee , Chong-sam Chung , Heui-jong Kang
IPC分类号： G11B2303
CPC分类号： G11B23/0308
摘要： A disk cartridge includes a case which contains a disk, and a shutter which opens/closes at least one opening formed in the case. The shutter is configured to be foldable around upper and lower surfaces of the case, and slides on the upper and lower surfaces of the case to open/close the opening. Since the shutter opens/closes the opening while being folded around the upper and lower surfaces of the case, a movable distance of the shutter for opening/closing the opening can be fully accommodated even though the size of the disk cartridge is reduced. In addition, applying the configuration of the shutter to a double-sided disk cartridge prevents an inflow of dust from entering into the double-sided disk cartridge since the shutter closes an opening, which is not in use, during a recording/reproducing operation.
摘要翻译：磁盘盒包括一个包含一个磁盘的壳体和一个打开/关闭形成在壳体中的至少一个开口的挡板。挡板被构造成围绕壳体的上表面和下表面可折叠，并且在壳体的上表面和下表面上滑动以打开/关闭开口。由于快门在围绕壳体的上表面和下表面折叠的同时打开/关闭开口，所以即使减小了盘盒的尺寸，也可以完全容纳用于打开/关闭开口的快门的可移动距离。此外，将快门的配置应用于双面盘盒防止灰尘进入双面盘盒，因为在记录/再现操作期间快门关闭不使用的开口。

89. 发明授权

US06678233B2 Objective lens and optical pickup device using the same 失效
标题翻译：物镜和使用其的光学拾取装置
公开(公告)号：US06678233B2
公开(公告)日：2004-01-13
申请号：US09794079
申请日：2001-02-28
申请人： Chong-sam Chung , Tae-kyung Kim , Young-man Ahn , Hea-jung Suh
发明人： Chong-sam Chung , Tae-kyung Kim , Young-man Ahn , Hea-jung Suh
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/127 , G11B7/1374 , G11B7/1378 , G11B7/13922 , G11B2007/0006
摘要： An objective lens includes an aspherical lens facing a disk and having a predetermined first focal distance and a predetermined numerical aperture, and a holographic lens installed adjacent to the aspherical lens and having a second focal distance longer than that of the first focal distance and having a diffraction lattice to compensate for the chromatism due to a change in wavelength of laser light having a wavelength of 670 nm or less. Thus, during the shift between recoding and reproduction of a DVD or an HD-DVD, the change in wavelength due to the change in power of the laser light and chromatism according to the change can be effectively corrected. Also, since the objective lens is formed of one aspherical lens and one holographic lens, the material for each of the lenses can be easily selected and also the structure of the optical pickup using the objective lens according to the present invention can be simplified.
摘要翻译：物镜包括面对盘并且具有预定的第一焦距和预定数值孔径的非球面透镜，以及安装在非球面透镜附近并具有比第一焦距的第二焦距更长的第二焦点距离的全息透镜，衍射晶格以补偿由于波长为670nm或更小的激光的波长变化引起的色差。因此，在DVD或HD-DVD的再编码和再现之间的移动期间，可以有效地校正由于激光的功率变化引起的波长变化和根据变化的色差。此外，由于物镜由一个非球面透镜和一个全息透镜形成，因此可以容易地选择每个透镜的材料，并且还可以简化根据本发明的使用该物镜的光学拾取器的结构。

90. 发明授权

US06580670B2 Optical pickup using a single light spot to generate tracking error signal and reproduction signal 失效
公开(公告)号：US06580670B2
公开(公告)日：2003-06-17
申请号：US09854922
申请日：2001-05-15
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： G11B7/0943 , G11B7/0901 , G11B7/0941 , G11B7/131 , G11B7/1353 , G11B7/1381
摘要： An optical pickup including a light detection element to divide light reflected from an optical recording medium into first through fourth light beam portions in a radial direction of the optical recording medium. From detection signals from the light detection element, a reproduction signal detection portion detects an information signal, and a tracking error signal detection portion detects a tracking error signal. The light source emits light that is focused as a single light spot on a main track of the optical recording medium. The tracking error signal detection portion gain controls and sums push-pull signals from the detection signals to detect, during a recording operation, a tracking error signal with reduced push-pull offset without erasing existing signals on adjacent tracks. The reproduction signal detection portion sums and gain controls the detection signals to detect an information signal containing reduced crosstalk from adjacent tracks.

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