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31. 发明授权

US5402407A Optical pickup apparatus and method for adjusting optical axis thereof 失效
标题翻译：光拾取装置及其光轴调整方法
公开(公告)号：US5402407A
公开(公告)日：1995-03-28
申请号：US78038
申请日：1993-06-18
申请人： Naoya Eguchi , Fumisada Maeda
发明人： Naoya Eguchi , Fumisada Maeda
IPC分类号： G11B7/125 , G11B7/22 , H01S3/02 , H01S3/109
CPC分类号： H01S3/025 , G11B7/125 , G11B7/127 , G11B7/22 , H01S3/0071 , H01S3/042 , H01S3/0627 , H01S3/09415 , H01S3/109
摘要： A method for the optical axis of an optical pickup apparatus includes the step of adjusting the optical axis of a beam expander for enlarging the diameter of a light beam outgoing from a laser light beam radiating device into coincidence with the optical axis of the light beam radiated from the laser light beam radiating device. The laser light beam radiating device includes a non-linear optical crystal element and is adapted for radiating a second harmonic laser light beam. The method also includes the step of mounting the beam expander having adjusted its optical axis, and a step of adjusting, with the beam expander mounted on the laser light radiating device, the optical axis of an optical system converging the laser light beam radiated from the laser light beam radiating device so that the optical axis is brought into coincidence with the optical axis of the laser beam radiated from the laser light beam radiating device.
摘要翻译：光学拾取装置的光轴的方法包括调整光束扩展器的光轴的步骤，用于将从激光束辐射装置出射的光束的直径扩大为与辐射的光束的光轴重合从激光束辐射装置。激光束辐射装置包括非线性光学晶体元件，并适于辐射二次谐波激光束。该方法还包括安装调整其光轴的光束扩展器的步骤，以及调整安装在激光发射装置上的光束扩展器的光学系统的光轴，该光学系统的光轴会聚从激光束辐射装置，使得光轴与从激光束辐射装置辐射的激光束的光轴重合。

32. 发明授权

US5347500A Compact optical pickup head with tracking error signal generator 失效
标题翻译：紧凑型光学拾音头，带跟踪误差信号发生器
公开(公告)号：US5347500A
公开(公告)日：1994-09-13
申请号：US159080
申请日：1993-11-29
申请人： Naoya Eguchi
发明人： Naoya Eguchi
IPC分类号： G11B7/085 , G11B7/09 , G11B7/135 , G11B7/00
CPC分类号： G11B7/08564 , G11B7/08582 , G11B7/0927 , G11B7/135
摘要： An optical pickup head apparatus comprises a yoke provided in an opposing relation to a magnet, a movable member having formed therethrough an aperture into which the yoke is inserted and around which a first coil is wound in an opposing relation to the magnet, an object lens supporting device having a pair of leaf springs for supporting the objective lens so that the objective lens can move in the direction parallel to the optical axis thereof and a plurality of second coils of substantially square shape for moving the objective lens in the direction parallel to the optical axis thereof and a tracking control device for rotating a mirror portion so that a beam spot focused on the optical disc by the objective lens follows a track on the optical disc, wherein the objective lens supporting device is secured to the movable member, the movable member is movably supported by the yoke and sides of the second coils which cross the optical axis of the objective lens and the first coil are located within a common magnetic gap.
摘要翻译：一种光拾取头装置，包括以与磁体相对的方式设置的磁轭，可移动部件，其形成有一个开口，磁轭插入该孔中，第一线圈以与磁铁相对的方式缠绕在其上;物镜支撑装置具有一对用于支撑物镜的板簧，使得物镜能够沿与其光轴平行的方向移动;以及多个基本上为正方形的第二线圈，用于沿平行于该光轴的方向移动物镜光轴和用于旋转镜部分的跟踪控制装置，使得通过物镜聚焦在光盘上的光束跟随光盘上的轨道，其中物镜支撑装置固定到可移动部件，可移动的构件由轭和可移动地支撑在与物镜的光轴交叉并且第一线圈位于的第二线圈的侧面在共同的磁隙内。

33. 发明授权

US5157642A Optical disc recording/reproduction apparatus with improved track seeking 失效
标题翻译：光盘记录/再现设备改进跟踪
公开(公告)号：US5157642A
公开(公告)日：1992-10-20
申请号：US451197
申请日：1989-12-15
申请人： Yoshihiro Tsukamura , Naoya Eguchi , Kimihiro Saitou , Shingeaki Wachi
发明人： Yoshihiro Tsukamura , Naoya Eguchi , Kimihiro Saitou , Shingeaki Wachi
IPC分类号： G11B7/085 , G11B7/09
CPC分类号： G11B7/08505 , G11B7/09
摘要： A recording and/or reproduction apparatus of an optical disc having recording tracks in which mirror areas are formed incorporates an optical head for recording or reproducing information signal onto or from the optical disc which has an optical detector for detecting a tracking error signal by a push-pull method; a fine actuator for precisely actuating the optical head finely; detecting means for detecting an output signal of the optical detector responding to reflected light from the mirror area; and driving means for driving the fine actuator in response to an output signal of the detecting means during the seeking operation.

34. 发明授权

US4747089A Method and apparatus for focusing servo control 失效
标题翻译：聚焦伺服控制的方法和装置
公开(公告)号：US4747089A
公开(公告)日：1988-05-24
申请号：US939614
申请日：1986-12-09
申请人： Naoya Eguchi , Mikio Sigiki , Hitoshi Okada
发明人： Naoya Eguchi , Mikio Sigiki , Hitoshi Okada
IPC分类号： G11B7/085 , G11B7/09 , G11B7/00 , G11B20/22
CPC分类号： G11B7/0941 , G11B7/0909
摘要： A focusing control method and apparatus employing a photodetector for generating a focusing error signal, a tracking error signal and an RF signal, and a closed loop focusing servo circuit responsive to the focusing error signal applied thereto for focusing a light spot in position on an optical disc. The focusing error signal is detected synchronously with the tracking error signal to produce a first periodic function signal. The focusing error signal is detected synchronously with the RF signal to produce a second periodic function signal. The tracking error signal is converted into a sin-wave signal having a predetermined amplitude. The RF signal is converted into a cos-wave signal having a predetermined amplitude. The first periodic function signal is multiplied by the cos-wave signal to produce a first component signal. The second periodic function signal is multiplied by the sin-wave signal to produce a second component signal. The first and second component signals are added to produce a composed disturbance signal. The composed disturbance signal is subtracted from the focusing error signal applied to the focusing servo circuit, thereby canceling a disturbance superimposed on the focusing error signal applied to the focusing servo circuit.
摘要翻译：一种聚焦控制方法和装置，其采用光检测器来产生聚焦误差信号，跟踪误差信号和RF信号，以及闭环聚焦伺服电路，响应于施加于其上的聚焦误差信号，将光点聚焦在光学上的位置上光盘。与跟踪误差信号同步地检测聚焦误差信号以产生第一周期性函数信号。与RF信号同步地检测聚焦误差信号以产生第二周期函数信号。跟踪误差信号被转换成具有预定幅度的正弦波信号。 RF信号被转换成具有预定幅度的cos波信号。第一周期功能信号乘以cos波信号以产生第一分量信号。第二周期函数信号乘以sin波信号以产生第二分量信号。添加第一和第二分量信号以产生合成干扰信号。从施加到聚焦伺服电路的聚焦误差信号中减去组合的干扰信号，从而消除叠加在施加到聚焦伺服电路的聚焦误差信号上的干扰。

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