公开(公告)号：US20040032815A1

公开(公告)日：2004-02-19

申请号：US10454838

申请日：2003-06-05

Applicant: SAMSUNG ELECTRONICS CO., LTD

Inventor： Tae-kyung Kim ,  Chong-sam Chung ,  Young-man Ahn ,  Byung-in Ma ,  Jong-bae Kim ,  Seok-Jung Kim

IPC: G11B007/135

CPC classification number: G11B7/131 ,  G11B7/09 ,  G11B7/0901 ,  G11B2007/0006

Abstract: A compatible optical pickup compatibly using a high density recording medium and at least one low density recording medium, includes an objective lens to form a light spot suitable for use on a recording surface of the high density recording medium by focusing a corresponding incident light beam with a high NA suitable for the high density recording medium and a light spot suitable for use on another recording surface of the low density recording medium by focusing another corresponding incident light beam, and an actuator provided to apply tilt to the objective lens. The light beam for the low density recording medium is incident on the objective lens as a divergent beam. When the objective lens is shifted in a radial direction, a tilt is applied to the objective lens corresponding to the shift.

Abstract translation: 兼容地使用高密度记录介质和至少一种低密度记录介质的兼容光学拾取器包括：物镜，用于通过将相应的入射光束聚焦在该高分辨率记录介质的记录表面上形成适于使用的光点 适合于高密度记录介质的高NA和通过聚焦另一相应的入射光束适用于低密度记录介质的另一个记录表面上的光点，以及设置成向物镜施加倾斜的致动器。 用于低密度记录介质的光束作为发散光束入射在物镜上。 当物镜沿径向移动时，对应于偏移的物镜施加倾斜。

公开(公告)号：US20030095334A1

公开(公告)日：2003-05-22

申请号：US10284415

申请日：2002-10-31

Applicant: Samsung Electronics Co., Ltd

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

IPC: G02B005/18 ,  G02B027/42 ,  G02B027/14

CPC classification number: G11B7/1275 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

Abstract: A compatible optical pickup for recording and/or reproducing information on/from multiple kinds of optical discs having different thicknesses by selectively using source lights of respective different wavelengths corresponding to a kind of disc and using a common objective lens. At least one phase compensator, which compensates a phase of a light having a particular wavelength to correct for spherical aberration due to a thickness difference between the kinds of optical discs and/or chromatic aberration due to a wavelength difference between the required source lights, is positioned between the source lights and an entrance pupil of the objective lens. Each phase compensator compensates light of at least one wavelength and passes light of at least one other wavelength without significant relative phase alteration. By using two phase compensators, the optical pickup may be made compatible with at least three kinds of optical discs.

Abstract translation: 一种兼容的光学拾取器，用于通过选择性地使用对应于一种光盘的各种不同波长的光源并使用公共物镜来在具有不同厚度的多种光盘上记录和/或再现信息。 至少一个相位补偿器补偿具有特定波长的光的相位，以校正由于各种光盘之间的厚度差导致的球面像差和/或由于所需源光之间的波长差导致的色差。 位于源光和物镜的入射光瞳之间。 每个相位补偿器补偿至少一个波长的光并且传递至少一个其它波长的光，而没有显着的相对相位变化。 通过使用两个相位补偿器，光拾取器可以与至少三种光盘相兼容。

公开(公告)号：US20020186644A1

公开(公告)日：2002-12-12

申请号：US10046556

申请日：2002-01-16

Applicant: Samsung Electronics Co., Ltd.

Inventor： Tae-Kyung Kim ,  Young-man Ahn ,  Jong-bae Kim ,  Chong-sam Chung

IPC: G11B007/005

CPC classification number: G11B7/00718 ,  G11B7/0053 ,  G11B7/00745 ,  G11B7/131

Abstract: A method of detecting a reproduction signal from an optical disc. A light beam reflected from a recording surface of an optical disc is divided into a central light beam portion and outer light beam portions in a direction corresponding to a radial direction of the optical disc. The central light beam portion and outer light beam portions are detected and a first detection signal from the central light beam portion and a second detection signal from at least one of the outer light beam portions are output. The amplitude of at least one of the first and second detection signals is adjusted and the reproduction signal is detected by subtraction between the first detection and second detection signals so that where reproduction is carried out on an optical disc having a varying track width the reproduction signal is improved.

Abstract translation: 一种从光盘检测再现信号的方法。 从光盘的记录表面反射的光束在与光盘的径向相对应的方向上被分成中心光束部分和外部光束部分。 检测中心光束部分和外部光束部分，并且输出来自中心光束部分的第一检测信号和来自外部光束部分中的至少一个的第二检测信号。 调整第一和第二检测信号中的至少一个的振幅，并且通过在第一检测和第二检测信号之间的减法来检测再现信号，使得在对具有变化的轨道宽度的光盘进行再现时，再现信号 改进了

公开(公告)号：US20040114495A1

公开(公告)日：2004-06-17

申请号：US10653451

申请日：2003-09-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Tae-Kyung Kim ,  Chong-sam Chung ,  Young-man Ahn ,  Jong-bae Kim

IPC: G11B007/135

CPC classification number: G11B7/1374 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical pickup having a plurality of objective lenses. At least one of the plurality of objective lenses is configured so that a type of wavefront error mainly generated by a tilt of the at least one of the plurality of objective lenses is the same as a type of a wavefront error mainly generated by an angle at which light is incident upon the at least one of the plurality of objective lenses.

Abstract translation: 具有多个物镜的光学拾取器。 多个物镜中的至少一个被配置为使得主要由多个物镜中的至少一个物镜的倾斜产生的波前误差的类型与主要由角度 哪个光入射到多个物镜中的至少一个物镜上。

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。

公开(公告)号：US20030107979A1

公开(公告)日：2003-06-12

申请号：US10295044

申请日：2002-11-15

Applicant: Samsung Electronics Co., Ltd.

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

IPC: G11B007/135

CPC classification number: G11B7/1353 ,  G11B7/127 ,  G11B7/1367 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20030021217A1

公开(公告)日：2003-01-30

申请号：US10183969

申请日：2002-06-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Tae-kyung Kim ,  Young-man Ahn ,  Jong-bae Kim ,  Jin-kyung Lee ,  Chong-sam Chung

IPC: G11B007/005 ,  G11B007/135

CPC classification number: G11B27/24 ,  G11B7/0053 ,  G11B7/131 ,  G11B7/1381 ,  G11B7/24082 ,  G11B20/1403 ,  G11B27/3027 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2545 ,  G11B2220/2562

Abstract: An optical disc apparatus and a wobble signal detection method in which a light beam projected onto an optical disc and reflected by the optical disc is divided into at least four light regions in the direction corresponding to the radial direction of the optical disc to detect the light regions, and a wobble signal is detected by performing a subtraction on first and second difference signals, the first difference signal obtained by performing a subtraction on detection signals for the inner light regions of the divided and/or detected light beam and the second difference signal obtained by performing a subtraction on detection signals for the outer light regions of the divided and/or detected light beam. Accordingly, when a wobble signal is reproduced from an optical disc manufactured by a wobble modulation manner, a wobble signal is prevented from being degraded due to the interference (cross talk) from the wobbles of adjacent tracks, even though the track pitch of the optical disc is reduced to improve the recording density.

Abstract translation: 一种光盘装置和摆动信号检测方法，其中投射到光盘上并被光盘反射的光束在与光盘的径向对应的方向上被划分为至少四个光区域，以检测光 区域，并且通过对第一和第二差分信号执行减法来检测摆动信号，通过对分割和/或检测光束的内部光区域的检测信号进行减法而得到的第一差分信号和第二差分信号 通过对分割和/或检测到的光束的外部光区域的检测信号进行减法而获得。 因此，当从由摆动调制方式制造的光盘再现摆动信号时，由于相邻轨道的摆动引起的干扰（串扰），摆动信号被防止掉，即使光学信号的轨道间距 减少光盘以提高记录密度。