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    Lens drive device, optical head device, and optical disk drive device
    42.
    发明专利
    Lens drive device, optical head device, and optical disk drive device 审中-公开

    公开(公告)号：JP2004280958A

    公开(公告)日：2004-10-07

    申请号：JP2003071674

    申请日：2003-03-17

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： MAEDA FUMISADA ,  ISHIDA TOMOYUKI

    IPC: G11B7/095 ,  G11B7/00 ,  G11B7/085 ,  G11B7/09

    CPC classification number: G11B7/08582 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/0946

    Abstract: PROBLEM TO BE SOLVED: To realize a high thrust and a wide band by utilizing effectively a magnetic circuit, and to prevent a bad influence on a focus servo and a tracking servo, in a lens drive device used for reading of information and recoding of information of an optical recording medium.
    SOLUTION: A lens drive device is provided with a movable part 10 provided with a focus coil 12F and a tracking coil 12T to move an objective lens 7 in the its optical path direction and in the tracking direction being orthogonal to the optical path direction, and a fixing part 16 supporting the movable part 10 and having a field magnet means 18 for each coil. an inertia axis (z axis) passing through the centroid G of the movable 10 and an optical axis of the objective lens 7 are made coincident, while the tracking coil 12T is provided at a side plane of one side of the movable part 10 in the (x) axis direction (linear velocity direction of disk), the focus coil 12F is provided at a side plane of the other side, the centroid G of the movable part 10 and a drive center are set at a position being deviated in the (x) axis direction.
    COPYRIGHT: (C)2005,JPO&NCIPI

    OPTICAL HEAD AND OPTICAL PICKUP
    43.
    发明专利
    OPTICAL HEAD AND OPTICAL PICKUP 失效

    公开(公告)号：JP2002092926A

    公开(公告)日：2002-03-29

    申请号：JP2000280359

    申请日：2000-09-14

    Applicant: SONY CORP

    Inventor： YAMAMOTO KENJI ,  OSATO KIYOSHI ,  MAEDA FUMISADA

    IPC: G02B7/02 ,  G02B7/08 ,  G02B13/00 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B7/1374 ,  G11B7/1378

    Abstract: PROBLEM TO BE SOLVED: To provide an optical head having an achromatic lens. SOLUTION: The optical head 110 has achromatic lenses 11 and 12 on which the laser beam LB of a blue or a purple-blue color is made incident from a semiconductor laser, objective lenses 14 and 16 which condense the laser beam which transmitted through the achromatic lenses 11 and 12 on an optical disk 80, lens holders 18 and 19 which hold the achromatic lenses 11 and 12 and the objective lenses 14 and 16 so that their optical axes are made coincident, and actuators 13T and 15F which shift the lens holders 18 and 19 in the direction of the focus and/or tracking direction of the optical disk 80. The lens holders 18 and 19 are fixed mutually, and the lenses 11, 12 14 and 16 are shifted unitedly by the actuators 13T and 15F.

    FOCUS CONTROLLER, ITS METHOD AND OPTICAL DISK DEVICE
    44.
    发明专利
    FOCUS CONTROLLER, ITS METHOD AND OPTICAL DISK DEVICE 失效

    公开(公告)号：JPH10283644A

    公开(公告)日：1998-10-23

    申请号：JP8409097

    申请日：1997-04-02

    Applicant: SONY CORP

    Inventor： ICHIMURA ISAO ,  MAEDA FUMISADA ,  YAMAMOTO KENJI ,  OSATO KIYOSHI ,  WATANABE TOSHIO

    IPC: G11B7/00 ,  G11B7/09

    Abstract: PROBLEM TO BE SOLVED: To always keep focusing errors in an operation within a permitted limit by optimizing the residual focusing error (offset) amount of an optical system using an objective lens having a high numerical aperture. SOLUTION: The reproduced RF signal read out front an optical disk 10 to be rotatingly driven by a spindle motor 20 by an optical system 100 is amplified in an RF amplifying part 30 and its amplitude of the signal is detected in an amplitude detecting part 40. The detected amplitude is transmitted to a control part 50, which transmits a control signal based on the amplitude. Besides, a focusing error detecting part 60 applies a prescribed operation to the output of the photodetector of the optical system 100 for detecting a reflected light from the optical disk 10 to generate an error signal for performing the focus control of the system 100. Then, an adjustment 70 returns a controlled variable for performing the focus control of the optical pickup of the system 100 based on the error signal from the focusing error detecting part 60 and the control signal form the control part 50.

    RECORDING MEDIUM RECORDING AND REPRODUCING DEVICE AND RECORDING MEDIUM RECORDING AND REPRODUCING METHOD
    46.
    发明专利
    RECORDING MEDIUM RECORDING AND REPRODUCING DEVICE AND RECORDING MEDIUM RECORDING AND REPRODUCING METHOD 失效

    公开(公告)号：JPH09251662A

    公开(公告)日：1997-09-22

    申请号：JP5886996

    申请日：1996-03-15

    Applicant: SONY CORP

    Inventor： MAEDA FUMISADA ,  WATANABE TOSHIO ,  ICHIMURA ISAO ,  FUKUMOTO ATSUSHI ,  YAMAMOTO KENJI ,  OSATO KIYOSHI

    IPC: G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B7/1372

    Abstract: PROBLEM TO BE SOLVED: To obtain a satisfactory reproduced signal by reducing a spherical aberration to be caused by the error of the thickness of a substrate in the pickup having a two group lens. SOLUTION: A standing wave is generated by supplying a voltage corresponding to the thickness (the error) of the substrate of a disk 2 to the electrodes of the stator 51 constituted of (lead zirconate titanate) and which is fixed to an objective lens 36 via a base 59. The rotator 52 provided on a stator 51 performs revolution on a horizontal plane arround an optical axis by the standing wave. Consequently, since the feed screw 54 fixed to the rotator 52 becomes to rotate the feed screw 54 fixed to a solid emersion lens 37, the solid emersion lens 37 is moved in an optical axial direction with respect to the objective 36. Thus, the spherical aberration to be generated is reduced by changing the distance between the objective lens 36 and the solid emersion lens 37 according to the thickness (the error) of the substrate in such a manner.

    OPTICAL PICKUP DEVICE
    47.
    发明专利
    OPTICAL PICKUP DEVICE 失效

    公开(公告)号：JPH08315404A

    公开(公告)日：1996-11-29

    申请号：JP11994795

    申请日：1995-05-18

    Applicant: SONY CORP

    Inventor： YAMAMOTO KENJI ,  ICHIMURA ISAO ,  MAEDA FUMISADA ,  WATANABE TOSHIO ,  OSATO KIYOSHI

    IPC: G11B7/125 ,  G11B7/135 ,  G11B7/1372 ,  G11B7/1374

    Abstract: PURPOSE: To relax fitting accuracy of an objective lens and a hemispherical lens respectively by suppressing increase in aberations with respect to inclination of optical axis, inclination of the objective lens and eccentricity of the hemispherical lens, respectively. CONSTITUTION: This device has the hemispherical lens (emersion lens) 7 with its flat surface 7b facing the side of an optical recording medium 20 between the objective lens 6 and the optical recording medium 20. The thickness of the hemispherical lens 7 is increased by 20% to 50% of a radius of curvature of a spheroidal surface 7a as compared with condition of light to be vertically incident on the spheroidal surface 7a from the objective lens 6.

    MAGNETO-OPTICAL DISK DEVICE
    48.
    发明专利
    MAGNETO-OPTICAL DISK DEVICE 失效

    公开(公告)号：JPH03201234A

    公开(公告)日：1991-09-03

    申请号：JP33942789

    申请日：1989-12-27

    Applicant: SONY CORP

    Inventor： MAEDA FUMISADA

    IPC: G11B11/10 ,  G11B11/105

    Abstract: PURPOSE:To quickly separate magnets from each other with a small torque by supporting one of a pair of initializing magnets, which can be moved in such directions that they can approach and go away from a magneto-optical disk, by an elastic member which has an elastic force in such direction that magnets are separated from each other. CONSTITUTION:One magnet 12 of a pair of initializing magnets 8 and 12 can be moved in such directions that it can approach and go away from a magneto- optical disk 101, and this magnet 12 is supported by the elastic member which has an elastic force in such direction that initializing magnets are separated from each other. When the disk 101 is set, the magnetic force between initializing magnets causes initilizing magnets to approach each other against the elastic force of the elastic member. When the disk 101 is taken out, the elastic force of the elastic member separates initializing magnets from each other against the magnetic force between them. Consequently, the process to move the initializing magnets is shortened at the time of taking out the disk 101. Thus, initializing magnets are quickly separated from each other with a small torque.

    Negative type optical recording medium manufacturing method, and initialization device
    49.
    发明专利
    Negative type optical recording medium manufacturing method, and initialization device 审中-公开
    负型光记录介质制造方法和初始化装置

    公开(公告)号：JP2014017036A

    公开(公告)日：2014-01-30

    申请号：JP2012153923

    申请日：2012-07-09

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： SUMI YOJIRO ,  KOBAYASHI SEIJI ,  SAITO KIMIHIRO ,  MAEDA FUMISADA ,  NAKAO TAKASHI ,  MIURA TAKAHIRO ,  IKUTA TOMOYA

    IPC: G11B7/0065 ,  G11B7/0045 ,  G11B7/135 ,  G11B7/26

    Abstract: PROBLEM TO BE SOLVED: To provide a method for seamlessly connecting phases of holograms, in initialization processing of a negative type optical recording medium.SOLUTION: A mirror is arranged on a lower surface side of an optical recording medium having a hologram recording material layer. In this state, an upper surface side of the optical recording medium is irradiated with a laser beam having uniform light intensity and phase. The laser beam is interfered with a reflected laser beam obtained by reflecting the laser beam at the mirror, so that a hologram is formed on the hologram recording material layer. Even if the laser beam is not vertically incident on the hologram recording material layer, phases of holograms can be seamlessly connected at initialization processing.

    Abstract translation: 要解决的问题：提供一种用于在负型光记录介质的初始化处理中无缝连接全息图的方法。解决方案：在具有全息图记录材料层的光记录介质的下表面侧上布置有反射镜。 在该状态下，用具有均匀的光强度和相位的激光束照射光记录介质的上表面侧。 激光束受到反射激光束的反射激光束的干涉，从而在全息图记录材料层上形成全息图。 即使激光束不垂直入射在全息图记录材料层上，在初始化处理时，全息图的相位可以无缝连接。

    Objective lens, optical pickup device using the same, optical recording and reproducing device, and aberration-correcting method
    50.
    发明专利
    Objective lens, optical pickup device using the same, optical recording and reproducing device, and aberration-correcting method 审中-公开
    目标镜头，使用它的光学拾取装置，光学记录和再现装置，以及ABERRATION-Corrting方法

    公开(公告)号：JP2008262702A

    公开(公告)日：2008-10-30

    申请号：JP2008181899

    申请日：2008-07-11

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： YAMAMOTO KENJI ,  MAEDA FUMISADA ,  IMAI SATOSHI ,  SEO KATSUHIRO ,  KATO YOSHIAKI ,  OKAMOTO YOSHIKI ,  TAMURA TATSUMOTO

    IPC: G11B7/135 ,  G02B13/00

    Abstract: PROBLEM TO BE SOLVED: To simultaneously correct the third-order components and fifth-order components of spherical aberration generated due to differences (including difference errors) in thickness of a cover layer to excellently correct aberration even in an optical system in which high-order aberration occurs. SOLUTION: An objective lens 3 is provided, which condenses light on the recording surface of an optical recording medium and is used in an optical pickup device which makes recording and/or reproduction. The third-order and fifth-order spherical aberrations, which occur due to differences (thickness errors inclusive) in thickness of the cover layer 11 of an optical recording medium 10, are defined as SA3(C) and SA5(C), respectively, and the third-order and fifth-order spherical aberrations, which occur due to the magnification aberration of the objective lens, are defined as SA3(L) and SA5(L), respectively. When the third-order spherical aberration SA3(C) of the cover part of the optical recording medium is completely corrected with the third-order spherical aberration SA3(L) which occurs due to the magnification aberration of the objective lens, the objective lens 3 is formed so that a conditional expression -0.035 COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题：为了同时校正由于覆盖层的厚度差异（包括差异误差）而产生的球面像差的三次分量和五次分量，即使在其中 发生高阶像差。 解决方案：提供一种物镜3，其将光聚合在光学记录介质的记录表面上，并用于进行记录和/或再现的光学拾取装置中。 由于光记录介质10的覆盖层11的厚度差异（包括厚度误差）而发生的三阶和五阶球面像差分别被定义为SA3（C）和SA5（C） 并且由于物镜的放大像差而发生的三阶和五阶球面像差分别被定义为SA3（L）和SA5（L）。 当由于物镜的倍率发生的三次球面像差SA3（L）完全校正了光记录介质的盖部分的三阶球面像差SA3（C）时，物镜3 形成为使得条件表达式-0.035

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