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    Optical pick-up and information recording and reproducing apparatus
    4.
    发明公开
    Optical pick-up and information recording and reproducing apparatus 审中-公开
    光学扫描和记录设备和再现信息

    公开(公告)号：EP1160776A3

    公开(公告)日：2004-07-14

    申请号：EP01113040.8

    申请日：2001-05-29

    申请人： Matsushita Electric Industrial Co., Ltd.

    发明人： Onozawa, Kazutoshi ,  Imafuj, Osamu ,  Yuri, Masaaki ,  Ijima, Shinichi

    IPC分类号： G11B7/12

    CPC分类号： G11B7/127 ,  G11B7/08582 ,  G11B7/123

    摘要： An optical-pick up preventing the deterioration of the optical property by mounting the entire optical system on the movable portion and aligning the optical axis of the semiconductor laser element having the shortest wavelength with the center of the optical axis of the objective lens and an information recording and reproducing apparatus on which the optical pick-up is mounted. The optical pick-up includes a movable portion 6 on which at least a plurality of semiconductor laser elements 2 irradiating an optical recording medium 12 with laser beams and an objective lens 1 converging laser beams emerged from the semiconductor laser element are mounted, a fixed portion 7 supporting the movable portion 6, and a supporting component 8 connecting the movable portion 6 to the fixed portion 7 so that the movable portion 6 is rockable in a focus direction and a tracking direction of the optical recording medium 12; wherein at least two of the plurality of semiconductor laser elements 2 have a different lasing wavelength from each other and an optical axis of the semiconductor laser element having the shortest wavelength is aligned with the center of the optical axis of the objective lens 1. Thereby, it is possible to prevent the optical displacement in the optical system when the position of the objective lens is changed.

    Optical pick-up and information recording and reproducing apparatus
    10.
    发明公开
    Optical pick-up and information recording and reproducing apparatus 审中-公开
    OptischeAbtastgerätundAufzeichnungsgerätund Wiedergabe von信息

    公开(公告)号：EP1160776A2

    公开(公告)日：2001-12-05

    申请号：EP01113040.8

    申请日：2001-05-29

    申请人： Matsushita Electric Industrial Co., Ltd.

    发明人： Onozawa, Kazutoshi ,  Imafuj, Osamu ,  Yuri, Masaaki ,  Ijima, Shinichi

    IPC分类号： G11B7/12

    CPC分类号： G11B7/127 ,  G11B7/08582 ,  G11B7/123

    摘要： An optical-pick up preventing the deterioration of the optical property by mounting the entire optical system on the movable portion and aligning the optical axis of the semiconductor laser element having the shortest wavelength with the center of the optical axis of the objective lens and an information recording and reproducing apparatus on which the optical pick-up is mounted. The optical pick-up includes a movable portion 6 on which at least a plurality of semiconductor laser elements 2 irradiating an optical recording medium 12 with laser beams and an objective lens 1 converging laser beams emerged from the semiconductor laser element are mounted, a fixed portion 7 supporting the movable portion 6, and a supporting component 8 connecting the movable portion 6 to the fixed portion 7 so that the movable portion 6 is rockable in a focus direction and a tracking direction of the optical recording medium 12; wherein at least two of the plurality of semiconductor laser elements 2 have a different lasing wavelength from each other and an optical axis of the semiconductor laser element having the shortest wavelength is aligned with the center of the optical axis of the objective lens 1. Thereby, it is possible to prevent the optical displacement in the optical system when the position of the objective lens is changed.

    摘要翻译： 通过将整个光学系统安装在可动部分上并将具有最短波长的半导体激光元件的光轴与物镜的光轴的中心对准的光学特性和信息 记录和再现装置，其上安装有光学拾取器。 光学拾取器包括可动部分6，其中至少多个激光束照射光记录介质12的半导体激光元件2和从半导体激光元件出射会聚激光束的物镜1安装在固定部分6上 支撑可动部分6的支撑部件8和将可动部分6连接到固定部分7的支撑部件8，使得可移动部分6能够在光学记录介质12的聚焦方向和跟踪方向上摆动; 其中，所述多个半导体激光元件2中的至少两个具有彼此不同的激光波长，并且具有最短波长的半导体激光元件的光轴与物镜1的光轴的中心对准。由此， 当物镜的位置改变时，可以防止光学系统中的光学位移。