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公开(公告)号：EP0343979A3
公开(公告)日：1991-01-09
申请号：EP89305286.0
申请日：1989-05-25
发明人： Ishii, Mitsuo , Kurata, Yukio , Yamaoka, Hideyoshi
IPC分类号： G11B7/08
CPC分类号： G11B7/0932
摘要： An object lens driving device causes partial rotation of movable members (2, 11) holding an object lens (1) on an X-Y frame perpendicular to the optical axis of the object lens (1) about a resilient hinge member (16) as the fulcrum. The movable members (2, 11) are supported by base members (4, 12). The hinge member (16) interconnects the movable members (2, 11) and the base members (4, 12). The electro-magnetic coils (81, 82, 83, 84) and the magnets (65, 66) cause relative rotation of the movable members (2, 11) with respect to the base members (4, 12) about the hinge member (16) as center. The rotational axis passing through the hinge member (16) passes through the position of center of gravity of the movable members (2, 11) and the balanced position of moment of inertia of the movable members (2, 11).
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公开(公告)号：EP0122816B1
公开(公告)日：1990-07-18
申请号：EP84302661.8
申请日：1984-04-18
CPC分类号： G11B7/0932 , G11B7/093 , G11B11/10504 , G11B11/10576
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33.发明公开Optical recording element and optical data retrieval system for use with the same 失效Optisches Aufzeichnungselement und optisches Datenwiedergabesystem zur Verwendung des Elementes。
公开(公告)号：EP0376673A2
公开(公告)日：1990-07-04
申请号：EP89313581.4
申请日：1989-12-27
CPC分类号： G11B7/24085 , G11B7/005 , G11B7/013
摘要： In the optical recording element of the invention, alignments of long thin pits inclined in various directions with respect to the track direction are formed on the tracks and information is recorded therein according to the different inclines of the pits, thereby performing higher-density and larger-volume recording without reducing the spacing between each pit and the track pitch.
The invention also discloses an optical data retrieval system for use with the above optical recording element, which scans the pit alignments with a laser beam spot, detects the inclines of the pits by obtaining the distribution of the intensity of reflected light which is caused by light diffraction at the pits, and plays back information in accordance with the inclines. Therefore, not only can the substantially same structure as that of a standard type optical data retrieval system be applied to the invention without making any complicated change, but also cross-talk is less likely to be produced in the read out signals.摘要翻译： 在本发明的光记录元件中，在轨道上形成在各个方向上相对于轨迹方向倾斜的长细孔的排列，并且根据凹坑的不同斜度记录信息，由此执行更高密度和更大的 - 音量记录，而不减少每个凹坑和轨道间距之间的间距。 本发明还公开了一种与上述光学记录元件一起使用的光学数据检索系统，其利用激光束点扫描凹坑对准，通过获得由光引起的反射光强度的分布来检测凹坑的倾斜 在凹坑处衍射，并根据倾斜回放信息。 因此，不仅可以将本质上与标准型光学数据检索系统基本相同的结构应用于本发明，而且不会发生任何复杂的变化，而且在读出信号中也不太可能产生串扰。
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公开(公告)号：EP0115666B1
公开(公告)日：1990-05-02
申请号：EP83305435.6
申请日：1983-09-15
CPC分类号： G11B7/093 , G11B7/09 , G11B11/10504 , G11B11/10576
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公开(公告)号：EP0343979A2
公开(公告)日：1989-11-29
申请号：EP89305286.0
申请日：1989-05-25
发明人： Ishii, Mitsuo , Kurata, Yukio , Yamaoka, Hideyoshi
IPC分类号： G11B7/08
CPC分类号： G11B7/0932
摘要： An object lens driving device causes partial rotation of movable members (2, 11) holding an object lens (1) on an X-Y frame perpendicular to the optical axis of the object lens (1) about a resilient hinge member (16) as the fulcrum. The movable members (2, 11) are supported by base members (4, 12). The hinge member (16) interconnects the movable members (2, 11) and the base members (4, 12). The electro-magnetic coils (81, 82, 83, 84) and the magnets (65, 66) cause relative rotation of the movable members (2, 11) with respect to the base members (4, 12) about the hinge member (16) as center. The rotational axis passing through the hinge member (16) passes through the position of center of gravity of the movable members (2, 11) and the balanced position of moment of inertia of the movable members (2, 11).
摘要翻译： 物镜驱动装置使作为支点的弹性铰链构件（16）使得将物镜（1）保持在垂直于物镜（1）的光轴的XY框架上的可动构件（2,11）部分旋转， 。 可动构件（2,11）由基座构件（4,12）支撑。 铰链构件（16）将可移动构件（2,11）和基座构件（4,12）相互连接。 电磁线圈（81,82,83,84）和磁体（65,66）引起可动构件（2,11）相对于基座构件（4,12）围绕铰链构件的相对旋转（ 16）为中心。 穿过铰链构件（16）的旋转轴线穿过可动构件（2,11）的重心位置和可移动构件（2,11）的惯性矩的平衡位置。
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公开(公告)号：EP0318772A1
公开(公告)日：1989-06-07
申请号：EP88119199.3
申请日：1983-09-15
CPC分类号： G11B11/10576 , G11B11/10504
摘要： This device has focussing (13 - 17) and tracking (19 - 24) controllers for moving the position of the optical focus of a light beam, such as a laser beam (2), respectively in focussing and tracking directions. Each controller has an electromagnetic drive means which comprises a closed magnetic circuit including a permanent magnet (13; 19), a yoke plate (14; 20), a yoke (15; 21), and a magnetic space (16; 22) between the yoke plate and yoke, and a drive coil (17; 23) arranged to move in the magnetic space. In order to minimise the magnetic field applied to the magnetic disc by the two electromagnetic drive means, the present invention is characterised in that respective portions of the closed magnetic circuits of the focussing and tracking electromagnetic drive means which are both closest to each other and disposed to be closest to the disc are of the same magnetic polarity.
摘要翻译： 该装置具有聚焦（13-17）和跟踪（19-24）控制器，用于分别在聚焦和跟踪方向上移动光束（例如激光束（2））的光学焦点的位置。 每个控制器具有电磁驱动装置，该电磁驱动装置包括位于两者之间的包括永磁体（13; 19），轭板（14; 20），磁轭（15; 21）和磁空间（16; 22）的闭合磁路 轭板和磁轭以及布置成在磁空间中移动的驱动线圈（17; 23）。 为了使通过两个电磁驱动装置施加到磁盘上的磁场最小，本发明的特征在于，聚焦和跟踪电磁驱动装置的闭合磁路的相应部分彼此最接近并设置 最接近光盘的磁极是相同的。
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37.发明公开
公开(公告)号：EP0314200A2
公开(公告)日：1989-05-03
申请号：EP88119198.5
申请日：1983-09-15
CPC分类号： G11B11/10504 , G11B11/10576
摘要： This device has a tracking controller (19-24) for moving the position of the optical focus of a light beam, such as a laser beam (2) in the tracking direction. The tracking controller has an electromagnetic drive means which comprises a closed magnetic circuit including a permanent magnet (19), a yoke plate (20), a yoke (21) and a magnetic space (22) between the yoke plate and the yoke, and a drive coil (23) arranged to move in the magnetic space (22). In order to minimise the magnetic field applied to the magnetic disc by the tracking electromagnetic drive means, the present invention is characterised in that the closed magnetic circuit is constructed in such a way that the permanent magnet (19) is disposed in a central position in the circuit, that is to say on the axis of the drive coil (23).
摘要翻译： 该装置具有跟踪控制器（19-24），用于沿跟踪方向移动诸如激光束（2）的光束的光学焦点的位置。 跟踪控制器具有电磁驱动装置，该电磁驱动装置包括在轭板与轭之间包括永磁体（19），轭板（20），磁轭（21）和磁空间（22）的封闭磁路，以及 驱动线圈（23），布置成在所述磁空间（22）中移动。 为了最小化通过跟踪电磁驱动装置施加到磁盘的磁场，本发明的特征在于，闭合磁路被构造成使永磁体（19）设置在中心位置 电路，也就是说在驱动线圈（23）的轴线上。
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公开(公告)号：EP0179653A1
公开(公告)日：1986-04-30
申请号：EP85307629.7
申请日：1985-10-22
CPC分类号： G11B20/10527 , G11B5/3103
摘要： One of the preferred embodiments of the present invention provides a thin-film magnetic-head assembly for a digital-signal recording/reproducing system using multiple tracks comprising: electronic-circuit components including a combined capacitor (25)/resistor (27), a constant-current source (31), an amplifier (30), and an analogue-signal multiplexer (30), all located inside a casing (18, 19) that surrounds the thin-film magnetic-head (21). While those electronic circuits present on the upper and lower surfaces of the casing are connected by means of an elastomer (28) so that these circuits are integrally connected to the thin-film magnetic head.
Reflecting the preferred format, the thin-film magnetic head of the casing is bent and extended so that electronic-circuit components can be mounted to it.-
公开(公告)号：EP0122816A3
公开(公告)日：1985-11-27
申请号：EP84302661
申请日：1984-04-18
CPC分类号： G11B7/0932 , G11B7/093 , G11B11/10504 , G11B11/10576
摘要： An optical focus position control system in an optomagnetic disc apparatus includes a tracking control device and a focus control device. The tracking control device includes an intermediate holder, a tracking parallel spring which connects an objective lens-mirror cylinder to the intermediate holder while ensuring movement of the objective lens-mirror cylinder in the radial direction of the optomagnetic disc, and a tracking drive mechanism to shift the objective lens-mirror cylinder in the radial direction within the intermediate holder. The focus control device includes a stationary holder, a focusing parallel spring which connects the intermediate holder to the stationary holder while ensuring movement of the intermediate holder in the direction of the optical axis of laser beams emitted through the optical focus position control system, and a focusing drive mechanism to shift the intermediate holder in the optical axis direction within the stationary holder.
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公开(公告)号：EP0126594A1
公开(公告)日：1984-11-28
申请号：EP84303176.6
申请日：1984-05-10
IPC分类号： G11B7/26
CPC分类号： G11B7/26 , G11B7/24 , G11B11/10582
摘要： An optical memory element includes stripe-shaped grooves formed directly on a glass substrate. To manufacture the optical memory element, a resist film is disposed on the glass substrate, and the groove pattern is formed in the resist film. A reactive ion etching is conducted through the groove pattern formed in the resistfilm so as to form the guide grooves in the glass substrate. After removing the resist film from the glass substrate, a magneto-optical recording layer is formed on the glass substrate.
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