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    • 1. 发明授权
    • Optical reproducing apparatus
    • 光学再现装置
    • US4592038A
    • 1986-05-27
    • US535850
    • 1983-09-26
    • Shigeo KubotaKenji Shintani
    • Shigeo KubotaKenji Shintani
    • G11B7/08G11B7/09G11B7/12G11B7/1353G11B7/1381G11B7/00G11B21/10
    • G11B7/0903G11B7/1353G11B7/1381
    • In an optical reproducing apparatus a divergent beam from a semiconductor laser light source is collimated to form a parallel light beam that is converged by an objective lens and focussed on an optical record medium. The light beam is reflected by the optical record medium and introduced into a signal photodetector so as to provide a reproduced signal. A phase type diffraction grating between the semiconductor laser light source and a beam splitter separates the laser beam from the semiconductor laser light source into zero, plus first and minus first order diffracted beams. A pair of tracking photodetectors receive reflected beams of the plus first and minus first order diffracted beams reflected by the optical record medium and then by the beam splitter. A concave lens located between the photodetectors and the beam splitter facilitates convenient positioning of the photodetectors so that a tracking error signal can be obtained by calculating the difference between the outputs of the first and second tracking photodetectors.
    • 在光学再现装置中,来自半导体激光光源的发散光束被准直以形成由物镜会聚并聚焦在光学记录介质上的平行光束。 光束被光学记录介质反射并被引入到信号光电检测器中以提供再现信号。 半导体激光光源和分束器之间的相位衍射光栅将激光束与半导体激光光源分离成零,加上第一和第一级衍射光束。 一对跟踪光电检测器接收由光学记录介质反射然后由分束器反射的正的第一和第一级衍射光束的反射光束。 位于光电检测器和光束分离器之间的凹透镜促进了光电探测器的便利定位,使得可以通过计算第一和第二跟踪光电检测器的输出之间的差异来获得跟踪误差信号。
    • 6. 发明授权
    • Optical tracking apparatus
    • 光学跟踪装置
    • US4408311A
    • 1983-10-04
    • US261514
    • 1981-05-07
    • Junichi SuzukiKenji Shintani
    • Junichi SuzukiKenji Shintani
    • G11B7/09G11B7/08G11B7/085G11B7/12G11B7/00G11B21/10
    • G11B7/08576G11B7/12
    • An optical tracking apparatus for tracing a spiral track on a recording disk includes an optical pickup device having a semiconductor laser and a photoelectric conversion element; an arm device pivotally mounted to an arm shaft with the pickup device being mounted to the free end thereof to thereby move substantially along the radial direction of the recording disk; sectorial arm drive coil attached to a rear end portion of the arm device and having a current path loop in parallel with the rotational plane of the arm device; and a pair of stationary magnetic field forming devices, each formed of a respective yoke and permanent magnet assembly, the yokes having respective air gaps in which magnetic fields in opposite directions to each other are formed, the arm drive coil being arranged to move in the air gaps and being supplied with an arm drive signal and a tracking error correction signal for causing the pickup device to trace the track.
    • 用于跟踪记录盘上的螺旋轨道的光学跟踪装置包括具有半导体激光器和光电转换元件的光学拾取装置; 手臂装置枢转地安装到臂轴上,拾取装置安装到其自由端,从而基本沿着记录盘的径向方向移动; 臂部驱动线圈附接到臂装置的后端部并且具有与臂装置的旋转平面平行的电流路径环路; 以及一对固定磁场形成装置,每个由各自的磁轭和永磁体组件形成,所述磁轭具有各自的空气间隙,在所述磁隙中形成彼此相反方向的磁场,所述臂驱动线圈被布置成在 并且被提供有臂驱动信号和用于使拾取装置跟踪轨道的跟踪误差校正信号。
    • 10. 发明授权
    • Optical reading apparatus
    • 光学读取装置
    • US4449213A
    • 1984-05-15
    • US330875
    • 1981-12-15
    • Kazutaka NoborimotoKeiji MarutaJunichi SuzukiKenji Shintani
    • Kazutaka NoborimotoKeiji MarutaJunichi SuzukiKenji Shintani
    • G02B7/04G11B7/08G11B7/09G11B21/02
    • B82Y15/00G02B7/04G11B21/02G11B7/0932
    • A device for supporting and positioning the objective lens in an optical reading apparatus, such as, a video disc player, comprises a first pair of parallel leaf springs attached at one end thereof to a fixed support member for motion parallel to a record medium surface. A movable frame is attached to the other ends of the first springs, and a second pair of leaf springs movable perpendicularly to the record medium surface extend from the frame, the second springs being generally parallel to and between the first pair but with their faces perpendicular to those of the first pair. The objective lens is mounted at the free ends of the second pair of springs, and is movable electromagnetically in orthogonally related directions by means of coils and magnets associated with the objective lens and with the frame.
    • 用于将物镜支撑和定位在诸如视频盘播放器的光学读取装置中的装置包括:第一对平行板簧,其一端连接到固定的支撑构件,用于平行于记录介质表面运动。 可移动框架附接到第一弹簧的另一端,并且可垂直于记录介质表面移动的第二对板簧从框架延伸,第二弹簧大致平行于第一对之间并且在第一对之间,但是它们的面垂直 到第一对的那些。 物镜安装在第二对弹簧的自由端,并通过与物镜相关联的线圈和磁体与框架在正交相关方向上以电磁方式移动。