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    • 4. 发明授权
    • Tracking control for optical information recording and reproducing
apparatus
    • 光信息记录和再现装置的跟踪控制
    • US5170384A
    • 1992-12-08
    • US475943
    • 1990-02-06
    • Yasuaki EdahiroNoboru KikuchiAkira Kurahashi
    • Yasuaki EdahiroNoboru KikuchiAkira Kurahashi
    • G11B7/085
    • G11B7/08517
    • A tracking control apparatus of an optical signal recording/reproduction apparatus, records and reproduces a data signal by causing a light spot focused on an optical recording medium to trace data-recording tracks and then accesses the light spot to a desired track. The tracking control apparatus varies a tracking-servo target value in a direction of performing the track-jumping operation, and then, if the tracking error signal exceeds a predetermined position level, the tracking control apparatus repeatedly varies the polarity of the tracking error signal until the light spot eventually arrives at the target track subject to the track-jumping operation. By virtue of the structure mentioned above, the tracking control apparatus can stably perform the track-jumping operation even when external disturbances, such as vibration, occur in the servo system.
    • 光信号记录/再现装置的跟踪控制装置通过使聚焦在光记录介质上的光点跟踪数据记录轨道,然后将光点存取到期望的轨道来记录和再现数据信号。 跟踪控制装置在执行轨道跳跃操作的方向上改变跟踪伺服目标值,然后如果跟踪误差信号超过预定位置电平,则跟踪控制装置重复地改变跟踪误差信号的极性,直到 光点最终到达轨道跳跃操作的目标轨道。 通过上述结构,即使在伺服系统中发生振动等外部干扰的情况下,跟踪控制装置也能够稳定地进行轨道跳跃动作。
    • 5. 发明授权
    • Optical head supporting apparatus
    • 光头支撑装置
    • US5124965A
    • 1992-06-23
    • US413676
    • 1989-09-28
    • Osamu MizunoTohru NakamuraNoboru Kikuchi
    • Osamu MizunoTohru NakamuraNoboru Kikuchi
    • G11B7/085G11B7/09
    • G11B7/08582G11B7/093G11B7/0932G11B7/0935
    • An optical head and supporting apparatus has an optical head for irradiating a parallel beam in a direction perpendicular to a recording surface of an optical disk, an objective lens rigidly mounted on the optical head for receiving the parallel beam from the optical head, tracking drive coils for driving the optical head over the whole recording range in a first direction transverse to the recording tracks of the optical disk, focusing drive coils for driving the optical head in a second direction perpendicular to the recording surface of the optical disk, and a support mechanism made of wire-shaped elastic bodies for supporting the optical head freely movably in the first and second directions over the whole recording range in the first direction of the optical head. The support mechanism is fixedly mounted through elastic bodies on a part of a structural body independent of movement of the optical head. Seek, tracking and focusing movements of a beam spot can be achieved in such a way that the wire-shaped eleastic bodies are elastically deformed by forces developed through the tracking drive coils and focusing drive coils thereby to move the optical head two-dimensionally.
    • 光头和支撑装置具有用于在与光盘的记录表面垂直的方向上照射平行光束的光学头,刚性地安装在光学头上的物镜,用于从光学头接收平行光束,跟踪驱动线圈 用于在与光盘的记录轨道横向的第一方向上在整个记录范围上驱动光头,用于沿垂直于光盘的记录表面的第二方向驱动光头的聚焦驱动线圈和支撑机构 在光学头的第一方向上在整个记录范围内沿第一和第二方向自由移动地支撑光学头的线状弹性体。 支撑机构通过弹性体固定地安装在结构体的一部分上,而与光学头的运动无关。 可以以这样的方式实现束斑的寻找,跟踪和聚焦运动,使得线状的弹性体由通过跟踪驱动线圈和聚焦驱动线圈产生的力弹性变形,从而二维地移动光学头。
    • 7. 发明授权
    • Objective lens actuator
    • 物镜执行器
    • US5044729A
    • 1991-09-03
    • US406303
    • 1989-09-12
    • Hironori TomitaTohru NakamuraNoboru KikuchiMasanari Mohri
    • Hironori TomitaTohru NakamuraNoboru KikuchiMasanari Mohri
    • G11B7/095G11B7/09
    • G11B7/0935G11B7/0933
    • An objective lens actuator is provided which is equipped with an actuating mechanism for actuating an objective lens mounted on a lens holder of an apparatus adapted to write or read information into or from a recording medium. The actuator moves the lens and its holder in two directions, one direction being substantially parallel to a surface of the recording medium such that the objective lens makes turning motion about a pivot axis oriented substantially normal to the surface of the recording medium and the other direction being vertical, with the lens and holder sliding vertically relative to the pivot axis. The actuator is equipped with at least one parallel driving coil for driving the movable section in the parallel direction and with at least one parallel driving magnetic circuit for imparting a magnetic flux to the parallel driving magnetic circuit. The actuator is arranged such that both drive forces, which are generated as a result of respective actions of electric currents flowing through at least two faces of the parallel driving coil and magnetic fluxes of the parallel driving magnetic circuit, constitute turning forces for turning the objective lens about an axis in the same rotational direction, thereby enhancing driving precision.
    • 提供了一种物镜致动器,其配备有致动机构,用于致动安装在适于将信息写入或从记录介质读取或读取信息的设备的镜头保持器上的物镜。 致动器使透镜及其保持器沿两个方向移动,一个方向基本上平行于记录介质的表面,使得物镜围绕基本上垂直于记录介质表面定向的枢转轴线而转动运动,而另一个方向 垂直,透镜和支架相对于枢转轴线垂直滑动。 致动器配备有至少一个并联的驱动线圈,用于沿并行方向驱动可动部分,并具有至少一个平行的驱动磁路,用于向平行驱动磁路施加磁通量。 致动器被布置成使得由于流过平行驱动线圈的至少两个面的电流和并联驱动磁路的磁通量的各种动作而产生的驱动力构成用于转动物镜的转动力 透镜围绕相同旋转方向的轴线,从而提高驱动精度。