公开(公告)号：US06724710B2

公开(公告)日：2004-04-20

申请号：US10196139

申请日：2002-07-17

申请人： Chong-sam Chung ,  Young-man Ahn ,  Tae-kyung Kim ,  Hea-jung Suh ,  Jong-bae Kim

发明人： Chong-sam Chung ,  Young-man Ahn ,  Tae-kyung Kim ,  Hea-jung Suh ,  Jong-bae Kim

IPC分类号： G11B700

CPC分类号： G11B7/13927 ,  G11B7/0948 ,  G11B7/1369

摘要： A spherical aberration compensator for compensating for spherical aberration resulting from a thickness deviation of a recording medium. The spherical aberration compensator includes a central compensation which provides a phase distribution that is effective for compensating for spherical aberration resulting from the thickness deviation and a peripheral compensation portion which surrounds the central compensation portion and provides a phase distribution that is effective for reducing a worsening of the spherical aberration caused by axial displacement of an objective lens from the central compensation portion. The spherical aberration compensator effectively relieves an optical pickup having an objective lens of an NA of 0.7 or greater of worsening of the spherical aberration resulting from thickness deviation of the recording medium.

摘要翻译： 一种用于补偿由记录介质的厚度偏差引起的球面像差的球面像差补偿器。 球面像差补偿器包括中心补偿，其提供有效补偿由厚度偏差产生的球面像差的相位分布和围绕中心补偿部分的外围补偿部分，并提供相位分布，该相位分布对于减少恶化 由物镜从中心补偿部分的轴向位移引起的球面像差。 球面像差补偿器有效地缓解了由于记录介质的厚度偏差导致的具有0.7或更大的NA的物镜的差异导致的球面像差恶化的光学拾取器。

公开(公告)号：US06665247B2

公开(公告)日：2003-12-16

申请号：US10024340

申请日：2001-12-21

申请人： Young-man Ahn ,  Chong-sam Chung ,  Tae-Kyung Kim ,  Hea-jung Suh ,  Jong-bae Kim

发明人： Young-man Ahn ,  Chong-sam Chung ,  Tae-Kyung Kim ,  Hea-jung Suh ,  Jong-bae Kim

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/00718 ,  G11B7/09 ,  G11B7/094 ,  G11B7/1369 ,  G11B7/13925

摘要： A land/groove discriminating method and an optical recording and/or reproducing apparatus employing the method are provided. The land/groove discriminating method emits a light beam onto an optical disc having lands and grooves through an optical element capable of causing and varying an effect of thickness variation of the optical disc, detects a light beam reflected/diffracted from the optical disc by dividing the reflected/diffracted light beam into inner and outer light beam portions, and discriminates between a land and a groove of the optical disc by detecting variation in a difference signal between detection signals from the inner and outer light beam portions while varying the degree of the effect of thickness variation of the optical disc by driving the optical element.

公开(公告)号：US08184520B2

公开(公告)日：2012-05-22

申请号：US11842210

申请日：2007-08-21

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： G11B7/00

CPC分类号： G11B7/13922 ,  G02B27/0025 ,  G11B7/1378 ,  G11B2007/13727

摘要： An optical pickup device includes a light source to emit light, an objective lens to focus the light on a recording medium to form a light spot, an optical path changer on an optical path between the light source and the objective lens to change the path of incident light, a chromatic aberration correction lens disposed on an optical path between the light source and the objective lens, and a photodetector to receive light which is reflected from the recording medium and is then incident thereon through the optical path changer. The chromatic aberration correction lens corrects a chromatic aberration occurring due to a change in the wavelength and/or due to an increase in a wavelength bandwidth of the light. The chromatic aberration correction lens includes at least two lenses such that a lens having a positive power and a lens having a negative power are adjacent to each other.

摘要翻译： 一种光学拾取装置，包括用于发光的光源，用于将光聚焦在记录介质上以形成光点的物镜，在光源和物镜之间的光路上的光路改变器， 入射光，设置在光源和物镜之间的光路上的色差校正透镜，以及光接收器，用于接收从记录介质反射然后通过光路变换器入射到其上的光。 色差校正透镜校正由于波长的变化和/或由于光的波长带宽的增加而发生的色像差。 色像差校正透镜包括至少两个透镜，使得具有正光焦度的透镜和具有负光焦度的透镜彼此相邻。

公开(公告)号：US07120109B1

公开(公告)日：2006-10-10

申请号：US09698201

申请日：2000-10-30

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： G11B7/00

CPC分类号： G11B7/1376 ,  G11B7/13922

摘要： An optical pickup capable of effectively reducing chromatic aberration that includes a collimating lens, which includes a diverging lens with diverging power and a focusing lens with focusing power, arranged on the optical path between a light source and an objective lens, wherein assuming that the total focal length of the collimating lens is f and the focal length of the diverging lens is fn, the collimating lens satisfies the relationship −1.5>f/fn. The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which will not yet standardized, need a blue light source near 405 nm and an objective lens having an numerical aperture of 0.6 or more.

摘要翻译： 一种能够有效地减少色差的光学拾取器，其包括准直透镜，该准直透镜包括具有发散光焦度的发散透镜和聚焦光焦度的聚焦透镜，该准直透镜布置在光源和物镜之间的光路上，其中， 准直透镜的焦距为f，发散透镜的焦距为fn，准直透镜满足关系-1.5> f / fn。 光学拾音器与现有的数字通用盘（DVD）兼容，并且尚未标准化的高分辨率（HD）-DVD需要405nm附近的蓝色光源，并且具有数值孔径为0.6的物镜或 更多。

公开(公告)号：US06785209B2

公开(公告)日：2004-08-31

申请号：US09755175

申请日：2001-01-08

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 ,  G11B7/0956 ,  G11B7/131 ,  G11B7/1356

摘要： An optical pickup capable of focusing a main light spot and an auxiliary light spot including optical aberration when an optical disk is not tilted, and analyzing the main light spot and the auxiliary light spot with a photodetector, thereby correcting aberration. The optical pickup includes a light source emitting light; light splitting means for splitting an incident beam into at least two light beams including a first beam and a second beam so as to form at least two light spots on an optical disk; optical path changing means for changing the traveling path of the incident first and second beams; an objective lens focusing the first and second beams to form a main light spot and an auxiliary light spot, respectively, on the optical disk; a photodetector having first and second light receiving portions receiving the first and second beams reflecting from the optical disk and passing through the optical path changing means, respectively, and performing photoelectric conversion on the received beams to produce and detect electrical signals; and a signal processor correcting aberration caused by tilting of the optical disk, using the electrical signals.

摘要翻译： 一种能够聚焦主光点的光学拾取器和当光盘不倾斜时包括光学像差的辅助光点，并且用光电检测器分析主光斑和辅助光斑，从而校正像差。 光学拾取器包括发射光的光源; 光分离装置，用于将入射光束分成包括第一光束和第二光束的至少两个光束，以便在光盘上形成至少两个光点; 用于改变入射的第一和第二光束的行进路径的光路改变装置; 物镜分别聚焦第一和第二光束以在光盘上形成主光点和辅助光斑; 光电检测器，具有第一和第二光接收部分，分别接收从光盘反射并通过光路改变装置的第一和第二光束，并对接收的光束执行光电转换以产生和检测电信号; 以及信号处理器，使用电信号校正由于光盘倾斜引起的像差。

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。

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。

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。

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.

公开(公告)号：US06987724B2

公开(公告)日：2006-01-17

申请号：US09883492

申请日：2001-06-19

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： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/13922 ,  G02B27/0025 ,  G11B7/1378 ,  G11B2007/13727

摘要： An optical pickup device includes a light source to emit light, an objective lens to focus the light on a recording medium to form a light spot, an optical path changer on an optical path between the light source and the objective lens to change the path of incident light, a chromatic aberration correction lens disposed on an optical path between the light source and the objective lens, and a photodetector to receive light which is reflected from the recording medium and is then incident thereon through the optical path changer. The chromatic aberration correction lens corrects a chromatic aberration occurring due to a change in the wavelength and/or due to an increase in a wavelength bandwidth of the light. The chromatic aberration correction lens includes at least two lenses such that a lens having a positive power and a lens having a negative power are adjacent to each other.

摘要翻译： 一种光学拾取装置，包括用于发光的光源，用于将光聚焦在记录介质上以形成光点的物镜，在光源和物镜之间的光路上的光路改变器， 入射光，设置在光源和物镜之间的光路上的色差校正透镜，以及光接收器，用于接收从记录介质反射然后通过光路变换器入射到其上的光。 色差校正透镜校正由于波长的变化和/或由于光的波长带宽的增加而发生的色像差。 色像差校正透镜包括至少两个透镜，使得具有正光焦度的透镜和具有负光焦度的透镜彼此相邻。