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：US20040174621A1

公开(公告)日：2004-09-09

申请号：US10460670

申请日：2003-06-13

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jong-Chul Choi ,  Jin-kyung Lee ,  Chong-sam Chung ,  Tae-kyung Kim ,  Kwang Kim ,  Jin-won Lee

IPC: G02B007/02

CPC classification number: G11B7/22 ,  G11B7/123

Abstract: An optical head includes a substrate, a laser diode, a photodetector, an objective lens, a prism, and an optical element. The laser diode is installed on the substrate and emits light. The photodetector is installed on the substrate and receives the light. The objective lens is installed on a first side of the substrate and focuses the light emitted from the laser diode onto a recording surface of a disc. The prism is installed on a second side of the substrate, transmits the light emitted from the laser diode toward the objective lens, and transmits the light reflected from the recording surface toward the photodetector. The optical element adjusts an optical path formed between the substrate and the prism.

Abstract translation: 光头包括基板，激光二极管，光电检测器，物镜，棱镜和光学元件。 激光二极管安装在基板上并发光。 光电检测器安装在基板上并接收光。 物镜安装在基板的第一侧上，并将从激光二极管发出的光聚焦到光盘的记录表面上。 棱镜安装在基板的第二面上，将从激光二极管发射的光透射到物镜，并将从记录表面反射的光透射到光电检测器。 光学元件调节在基板和棱镜之间形成的光路。

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。