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。

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.

公开(公告)号：US5144605A

公开(公告)日：1992-09-01

申请号：US449933

申请日：1989-12-18

申请人： Seiji Kobayashi ,  Norio Nishida ,  Naoya Eguchi ,  Shunji Yoshimura

发明人： Seiji Kobayashi ,  Norio Nishida ,  Naoya Eguchi ,  Shunji Yoshimura

IPC分类号： G11B21/08 ,  G11B7/007 ,  G11B7/085 ,  G11B21/10

CPC分类号： G11B7/08505

摘要： The method of the present invention comprises detecting a recording pattern, which is different for each tract, in each of track groups consisting of a predetermined number N or tracks recorded in advance on an optical disk(1), generating a tracking signal S.sub.ET whose signal level changes on the positive and negative sides of a target track T.sub.0 as the center, and moving the optical spot to the target track T.sub.0 on the basis of this tracking signal S.sub.ET. In this manner, it becomes possible to prevent uncontrollable movement of the optical spot and align the optical spot to a desired recording track within a short period of time.

摘要翻译： PCT No.PCT / JP89 / 00414 Sec。 371日期1989年12月18日 102（e）1989年12月18日PCT PCT 1989年4月18日PCT。 第WO89 / 10614号公报 日本公报1989年11月2日。本发明的方法包括检测在由光盘（1）上预先记录的预定数量N或轨迹组成的每个轨道组中的每条道路不同的记录模式， 产生其目标轨道T0的正负侧的信号电平变化为中心的跟踪信号SET，并且基于该跟踪信号SET将光点移动到目标轨道T0。 以这种方式，可以防止光点的不可控制的移动并且在短时间内将光点对准所需的记录轨道。

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。