公开(公告)号：US20020105735A1

公开(公告)日：2002-08-08

申请号：US09987426

申请日：2001-11-14

Applicant: Samsung Electronics Co., Ltd

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

IPC: G02B009/12

CPC classification number: G11B7/1374 ,  G11B7/13922 ,  G11B2007/13727

Abstract: An objective lens device and an optical pickup employing the objective lens device. The objective lens device is formed of three lenses including a lens having a negative power and formed of material having an Abbe number which is 45 or less in line d. At least one surface of surfaces of the three lenses is formed to be aspherical. Thus, in the objective lens device, a high numerical aperture of 0.70 or more is realized and chromatic aberration is corrected with respect to blue light enabling improved recording and/or reproduction using blue light.

Abstract translation: 一种物镜装置和采用该物镜装置的光拾取器。 物镜装置由具有负功率的透镜的三个透镜形成，并且由具有在行d中为45以下的阿贝数的材料形成。 三个透镜的表面的至少一个表面形成为非球面。 因此，在物镜装置中，实现了0.70以上的高数值孔径，并且相对于能够改善使用蓝光的记录和/或再现的蓝光来校正色像差。

公开(公告)号：US20040218489A1

公开(公告)日：2004-11-04

申请号：US10861404

申请日：2004-06-07

Applicant: Samsung Electronics Co., Ltd.

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

IPC: G11B007/00

CPC classification number: G11B20/10009 ,  G11B7/005

Abstract: 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.

Abstract translation: 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：US20040184367A1

公开(公告)日：2004-09-23

申请号：US10778169

申请日：2004-02-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jin-won Lee ,  Kwang Kim ,  Seok-jung Kim ,  Chong-sam Chung ,  Hea-jung Suh ,  Jong-chul Choi

IPC: G11B007/00

CPC classification number: G11B7/127 ,  G11B7/122 ,  G11B7/123 ,  G11B7/22

Abstract: An optical pickup apparatus including a swing arm pivotably installed in a tracking direction with respect to a disc, and an optical pickup unit supported by the swing arm and driven in a focusing direction, wherein the optical pickup unit includes a laser diode, an objective lens to focus light emitted from the laser diode on a recording surface of the disc, and a heat sink plate to dissipate heat generated from the laser diode, wherein the heat sink plate is provided close to the disc so as to be directly exposed to wind generated during rotation of the disc.

Abstract translation: 一种光拾取装置，其特征在于，包括：摆动臂，其以相对于盘的跟踪方向可枢转地安装;以及光拾取单元，其由所述摆臂支撑并沿着聚焦方向被驱动，其中所述光学拾取单元包括激光二极管，物镜 将从激光二极管发射的光聚焦在盘的记录表面上，以及散热板，以消散由激光二极管产生的热量，其中散热板靠近盘设置，以便直接暴露于产生的风 在盘旋转期间。

公开(公告)号：US20030086353A1

公开(公告)日：2003-05-08

申请号：US10196139

申请日：2002-07-17

Applicant: SAMSUNG ELECTRONICS CO. LTD.

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

IPC: G11B007/135

CPC classification number: G11B7/13927 ,  G11B7/0948 ,  G11B7/1369

Abstract: 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.

Abstract translation: 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。