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    • 1. 发明申请
    • 光ピックアップ及びディスクドライブ装置
    • 光学拾取和磁盘驱动单元
    • WO2004036566A1
    • 2004-04-29
    • PCT/JP2003/012823
    • 2003-10-07
    • ソニー株式会社相木 一磨
    • 相木 一磨
    • G11B7/135
    • G11B7/1275G11B7/1378G11B2007/0006
    • An optical pickup comprising a light emitting element (14) having a first light emitting unit (14a) and a second light emitting unit (14b) respectively emitting a first laser beam and a second laser beam, an optical branching element (18), a collimator lens (19) for forming the first laser beam and the second laser beam into parallel light fluxes, and a light receiving element (29), wherein the optical axis of the first laser beam is allowed to agree with that of an object lens (13), the optical axis of the second laser beam is formed off that of the object lens, and the second light emitting unit is disposed in a position where an incident angle alpha, with respect to the optical branching element, of the second laser beam is larger than that theta, with respect to the optical branching element, of the first laser beam to thereby reduce the generation amount of aberration and improve a performance; and a disk drive unit.
    • 一种光拾取器,包括具有分别发射第一激光束和第二激光束的第一发光单元(14a)和第二发光单元(14b)的光发射元件(14),光分路元件(18), 用于将第一激光束和第二激光束形成为平行光束的准直透镜(19)和受光元件(29),其中允许第一激光束的光轴与物镜的光轴一致 如图13所示,第二激光束的光轴与物镜的光轴形成,第二发光单元配置在第二激光束相对于光分路器的入射角α的位置 相对于第一激光束的光分支元件大于该θ,从而减小像差的产生量并提高性能; 和磁盘驱动器单元。