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    • 2. 发明授权
    • Optical disk apparatus with galvanomirror having movable reflecting
surfaces cooperating with fixed reflecting surfaces
    • 具有电子反射镜的光盘装置具有与固定反射表面配合的可移动反射表面
    • US5412633A
    • 1995-05-02
    • US164785
    • 1993-12-10
    • Atsushi IchikawaYoshiaki YamauchiAkira Saito
    • Atsushi IchikawaYoshiaki YamauchiAkira Saito
    • G11B7/08G11B7/085G11B7/09G11B7/12G11B7/135G11B7/00
    • G11B7/08564G11B7/12G11B7/1362
    • An optical disk unit has an optical system which is separated into a movable head assembly and a fixed optical system so that the movable head is made light weight. The movable head has an objective lens, an objective lens driving unit for focusing the objective lens, and a head moving unit for moving the whole movable head in the radial direction of an optical disk. The fixed optical system has a galvanomirror for deflecting the light emitted from a laser beam source and causing it to fall on the objective lens of the movable head, and detectors for receiving the light of the optical spot formed by the objective lens which is reflected from the optical disk. The galvanomirror is provided with a first mirror for reflecting the light emitted from the beam source to a plane intersecting the rotational shaft at right angles and directing the light to a fixed mirror, and a second mirror for deflecting the light reflected from the fixed mirror and directing the light to the objective lens. As a result, when the galvanomirror is rotated, the light reflected from the second mirror is constantly passed through a portion near the focal point of the objective lens of the light source side and falls on the objective lens.
    • 光盘单元具有分离成可动头组件和固定光学系统的光学系统,使得可移动头部重量轻。 可移动头具有物镜,用于聚焦物镜的物镜驱动单元和用于沿光盘径向移动整个可移动头的头移动单元。 固定光学系统具有用于使从激光束源发射的光偏转并使其落在可移动头的物镜上的电流镜,以及用于接收由物镜形成的光点的光的检测器,其被从 光盘。 电流镜设置有第​​一反射镜,用于将从光束源发射的光线以直角反射到与旋转轴相交的平面并将光引导到固定反射镜;以及第二反射镜,用于偏转从固定镜反射的光;以及 将光引导到物镜。 结果,当电流计镜旋转时,从第二反射镜反射的光不断地通过光源侧的物镜的焦点附近的部分落在物镜上。
    • 3. 发明授权
    • Apparatus for driving objective lens
    • 用于驱动物镜的装置
    • US4838649A
    • 1989-06-13
    • US128578
    • 1987-12-04
    • Atsushi IchikawaMasamichi ItoAkira Saito
    • Atsushi IchikawaMasamichi ItoAkira Saito
    • G11B7/09
    • G11B7/093
    • A slide shaft is provided upright on a support portion, and a lens support is provided on the slide shaft in such a manner that it can rotate around the slide shaft and slide in the axial direction of the slide shaft. Therefore, a hole having a larger diameter than that of the slide shaft is formed at the center of the lens support. An objective lens is provided at one end of the lens support. A drive portion comprises permanent magnets provided on the support portion and coils for rotation and sliding which are provided on the lens support, and the rotation and movement in the sliding direction are performed by passing currents through the coils. The lens support is supported by a support spring which has high rigidity to the translation in the tracking direction and low rigidity to the rotation in a plane intersecting the slide shaft at right angles.
    • 滑动轴竖立地设置在支撑部分上,并且透镜支架设置在滑动轴上,使得其能够围绕滑动轴线旋转并沿着滑动轴的轴向滑动。 因此,在透镜支架的中心形成有直径大于滑动轴直径的孔。 在透镜支架的一端设有物镜。 驱动部分包括设置在支撑部分上的永磁体和设置在透镜支架上的用于旋转和滑动的线圈,并且通过使电流通过线圈来执行滑动方向上的旋转和移动。 透镜支撑件由支撑弹簧支撑,该支撑弹簧在跟踪方向上的平移具有高刚性,并且在与滑动轴线成直角相交的平面中的旋转的刚度低。
    • 6. 发明授权
    • Flexible branching apparatus in superconducting magnetically levitated
railway having variable cross-section main flexible beam
    • 具有可变横截面主柔性梁的超导磁悬浮铁路中的柔性分支装置
    • US5287811A
    • 1994-02-22
    • US29161
    • 1993-03-10
    • Akio MatsuuraAtsushi IchikawaGenpachi AnamiIchirou Sugimoto
    • Akio MatsuuraAtsushi IchikawaGenpachi AnamiIchirou Sugimoto
    • E01B25/00E01B25/34E01B26/00
    • E01B25/00
    • A flexible branching apparatus in a superconducting magnetically levitated railway having a U-shaped guideway includes a flexible main beam, which is integrally disposed along the guideway at the center thereof and has cross-sectional rigidity that gradually decreases from a fixed end to a distal end thereof, the main beam consisting of paramagnetic steel; cross beams integrated with the main beam and consisting of paramagnetic steel; runway concrete panels laid between the cross beams and supported so as not to possess transverse rigidity; short-span concrete panels connected to vertical portions of the cross beams by hinge support means, the short-span concrete panels having ground coils mounted thereon and constructing side walls for guidance; a driving device for driving the distal end of the main beam so as to be capable of forming the main beam into an alignment that does not fall below a minimum radius of curvature decided from an acceleration level for riding comfort; and a stopping device and locking device for restraining movement of the main beam upon completion of movement of the distal end thereof. Despite the fact that the guideway is U-shaped, bending into a planned alignment can be performed merely by driving a single location, namely the distal end portion.
    • 在具有U形导轨的超导磁悬浮铁路中的柔性分支装置包括柔性主梁,该主梁在其中心处沿着导轨整体设置,并且具有从固定端到远端逐渐减小的截面刚度 主梁由顺磁钢组成; 与主梁结合的横梁由顺磁钢组成; 跑道混凝土板铺设在横梁之间,支撑为不具有横向刚度; 短跨度混凝土板通过铰链支撑装置连接到横梁的垂直部分,短跨度混凝土板具有安装在其上的接地线圈并且构造用于引导的侧壁; 用于驱动主光束的远端的驱动装置,以便能够将主光束形成为不会降低到从用于骑乘舒适度的加速度水平确定的最小曲率半径以下的对准; 以及用于在其远端完成移动时抑制主梁的运动的止动装置和锁定装置。 尽管导轨为U形,但只能通过驱动单个位置即远端部分来执行弯曲成计划的对准。