公开(公告)号：US07543312B2

公开(公告)日：2009-06-02

申请号：US11455634

申请日：2006-06-20

Applicant: Seok Jung Kim ,  Yong Han Yoon ,  Soo Han Park ,  Jung Gug Pae

Inventor： Seok Jung Kim ,  Yong Han Yoon ,  Soo Han Park ,  Jung Gug Pae

IPC: G11B7/085

CPC classification number: G11B7/093 ,  G11B7/0933 ,  G11B7/0935 ,  G11B2007/0006

Abstract: An optical pickup device is provided with a plurality of object lens corresponding to various kinds of optical discs having different recording densities, in which the structure of the optical pickup device is simplified and the size of the optical pickup device is minimized. The optical pickup device comprises a bobbin including an upper surface, at which first and second object lenses are mounted, an opened lower surface, and a first and second side surfaces supported by a supporting unit, the first and second side surfaces being opposite to each other, a first focus coil and a first tracking coil mounted at a third side surface of the bobbin, a second focus coil and a second tracking coil mounted at a fourth side surface of the bobbin, which is opposite to the third side surface, and magnets disposed opposite to the first and second focus coils and the first and second tracking coils.

Abstract translation: 光拾取装置具有对应于具有不同记录密度的各种光盘的多个物镜，其中光拾取装置的结构被简化并且光拾取装置的尺寸最小化。 光学拾取装置包括一个线轴，该线轴包括安装有第一和第二物镜的上表面和一个开放的下表面，以及由支撑单元支撑的第一和第二侧表面，第一和第二侧表面与每个 另一方面，安装在线轴的第三侧面的第一聚焦线圈和第一跟踪线圈，安装在与第三侧面相对的线轴的第四侧面的第二聚焦线圈和第二跟踪线圈，以及 与第一和第二聚焦线圈以及第一和第二跟踪线圈相对设置的磁体。

公开(公告)号：US06256272B1

公开(公告)日：2001-07-03

申请号：US09292443

申请日：1999-04-15

Applicant: Yong Han Yoon

Inventor： Yong Han Yoon

IPC: G11B709

CPC classification number: G11B7/1362 ,  G11B7/127 ,  G11B7/1359 ,  G11B7/13922 ,  G11B2007/0006

Abstract: Disclosed is an optical pickup. The optical pickup comprises an optical disc; a first light source having an astigmatic difference and emitting a first laser beam of a first predetermined wavelength; a second light source emitting a second laser beam of a second predetermined wavelength which is different from the first predetermined wavelength; a first beam splitter arranged on a path of the first laser beam for reflecting the first laser beam; a second beam splitter disposed at one side of the first beam splitter such that it has a predetermined sloping angle, for reflecting the second laser beam toward the optical disc and for generating an astigmatism which can offset the astigmatic difference of the first light source when the first laser beam passes therethrough; a reflecting mirror for totally reflecting the second laser beam which is reflected by the second beam splitter and the first laser beam which passes through the second beam splitter; a collimator lens for shaping the laser beams reflected by the reflecting mirror into parallel lights; an objective lens for spotting the parallel light beams shaped by the collimator lens onto the optical disc; and a photodiode arranged at the other side of the first beam splitter for detecting an error signal from the laser beams which are spotted and reflected onto and from the optical disc.

Abstract translation: 公开了一种光学拾取器。 光学拾取器包括光盘; 具有像散差的第一光源和发射第一预定波长的第一激光束; 发射与第一预定波长不同的第二预定波长的第二激光束的第二光源; 布置在第一激光束的路径上用于反射第一激光束的第一分束器; 设置在所述第一分束器的一侧的第二分束器，使得其具有预定的倾斜角度，用于将所述第二激光束朝向所述光盘反射并用于产生像散，所述散光可以抵消所述第一光源的散光差异， 第一激光束通过; 用于全反射由第二分束器反射的第二激光束和穿过第二分束器的第一激光束的反射镜; 用于将由反射镜反射的激光束成形为平行光的准直透镜; 用于将由准直透镜成形的平行光束照射到光盘上的物镜; 以及布置在第一分束器的另一侧的光电二极管，用于检测从光盘上被点样并反射的激光束的误差信号。