公开(公告)号：US06587284B2

公开(公告)日：2003-07-01

申请号：US09967078

申请日：2001-09-28

申请人： Takeo Santo ,  Masanari Mohri ,  Hiroshi Yamamoto ,  Kanji Wakabayashi

发明人： Takeo Santo ,  Masanari Mohri ,  Hiroshi Yamamoto ,  Kanji Wakabayashi

IPC分类号： G02B702

CPC分类号： G11B7/0956 ,  G11B7/0933 ,  G11B7/0935

摘要： An objective lens driving apparatus is improved in a tracking drive sensitivity, and is capable of suppressing the occurrence of a tilt when a moving member is driven for tracking and focusing motions. To achieve this, the objective lens driving apparatus comprises: a substantially rectangularly shaped focusing coil and a substantially rectangularly shaped tracking coil, both arranged in the same plane, and fixed to a lens holder to drive the lens holder on which an objective lens is held; and a magnet having mutually opposite magnetic poles arranged at positions opposite winding portions of the focusing coil which lie on two sides thereof extending perpendicularly to a focusing direction, and also having mutually opposite magnetic poles arranged at positions opposite winding portions of the tracking coil which lie on two sides thereof extending perpendicularly to a tracking direction.

公开(公告)号：US06344936B1

公开(公告)日：2002-02-05

申请号：US09672847

申请日：2000-09-28

申请人： Takeo Santo ,  Masanari Mohri ,  Hiroshi Yamamoto ,  Kanji Wakabayashi

发明人： Takeo Santo ,  Masanari Mohri ,  Hiroshi Yamamoto ,  Kanji Wakabayashi

IPC分类号： G02B702

CPC分类号： G11B7/0956 ,  G11B7/0933 ,  G11B7/0935

摘要： An objective lens driving apparatus is improved in a tracking drive sensitivity, and is capable of suppressing the occurrence of a tilt when a moving member is driven for tracking and focusing motions. To achieve this, the objective lens driving apparatus comprises: a substantially rectangularly shaped focusing coil and a substantially rectangularly shaped tracking coil, both arranged in the same plane, and fixed to a lens holder to drive the lens holder on which an objective lens is held; and a magnet having mutually opposite magnetic poles arranged at positions opposite winding portions of the focusing coil which lie on two sides thereof extending perpendicularly to a focusing direction, and also having mutually opposite magnetic poles arranged at positions opposite winding portions of the tracking coil which lie on two sides thereof extending perpendicularly to a tracking direction.

摘要翻译： 物镜驱动装置的跟踪驱动灵敏度得到改善，并且当驱动移动部件进行跟踪和聚焦运动时能够抑制倾斜的发生。 为了实现这一点，物镜驱动装置包括：基本上矩形的聚焦线圈和基本上矩形的跟踪线圈，均布置在同一平面中，并且固定到透镜保持器以驱动保持物镜的透镜保持器 ; 以及具有相互相对的磁极的磁体，其布置在聚焦线圈的相对的卷绕部分的相对于聚焦方向垂直延伸的两侧上的位置处，并且还具有相互相对的磁极，该磁极布置在跟踪线圈的绕组部分相对的位置， 在其两侧垂直于跟踪方向延伸。

公开(公告)号：US6134058A

公开(公告)日：2000-10-17

申请号：US342585

申请日：1999-06-29

申请人： Masanari Mohri ,  Hitoshi Fujii ,  Kanji Wakabayashi ,  Hiroshi Yamamoto ,  Teruyuki Takizawa ,  Takeo Santo

发明人： Masanari Mohri ,  Hitoshi Fujii ,  Kanji Wakabayashi ,  Hiroshi Yamamoto ,  Teruyuki Takizawa ,  Takeo Santo

IPC分类号： G11B7/09 ,  G11B7/095 ,  H02K41/035 ,  G02B7/02 ,  G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/0932 ,  G11B7/0933 ,  G11B7/0935 ,  H02K41/0354 ,  H02K2201/18

摘要： An object lens driving device of the present invention includes a movable section, supporting sections for supporting the movable section and a base for holding the supporting sections. The movable section includes an object lens for recording and/or reproducing optical information to and/or from a disk-shaped recording medium, a lens holder for holding the object lens and at least four permanent magnets adhered to the lens holder. The supporting sections include at least four metal wires substantially parallel to each other, each wire having a first end fixed to the lens holder and a second end connected to the base, and elastic deformable elements connected to the base and having connecting sections thereof connected to the second end of each respective metal wire. The base includes yokes fixed to the base and facing the respective permanent magnets, focusing coils wound around the respective yokes, wound axes of the focusing coils being oriented in a direction of an optical axis of the object lens, and tracking coils wound around the respective yokes, wound axes of the tracking coils being oriented in a direction perpendicular to the wound axes of the focusing coils.

摘要翻译： 本发明的物镜驱动装置包括可动部，用于支撑可动部的支撑部和用于保持支撑部的基部。 可移动部分包括用于记录和/或再现光盘信息到和/或来自盘形记录介质的物镜，用于保持物镜的透镜保持器和粘附到透镜保持器的至少四个永磁体。 所述支撑部分包括至少四条彼此平行的金属线，每条线具有固定到所述透镜保持器的第一端和连接到所述基座的第二端，以及连接到所述基座的弹性变形元件，并且其连接部分连接到 每个相应金属线的第二端。 底座包括固定在基座上并面向各个永久磁铁的轭，围绕各轭轭的聚焦线圈，聚焦线圈的缠绕轴线沿着物镜的光轴方向定向，并且缠绕在相应的磁轭上的跟踪线圈 磁轭，跟踪线圈的绕线轴线在垂直于聚焦线圈的绕线轴线的方向上定向。

公开(公告)号：US06747921B2

公开(公告)日：2004-06-08

申请号：US10390129

申请日：2003-03-17

申请人： Kanji Wakabayashi ,  Hitoshi Fujii ,  Hiroshi Yamamoto ,  Masanari Mohri ,  Takayuki Kojima ,  Daisaburo Kubota ,  Kenichiro Urairi

发明人： Kanji Wakabayashi ,  Hitoshi Fujii ,  Hiroshi Yamamoto ,  Masanari Mohri ,  Takayuki Kojima ,  Daisaburo Kubota ,  Kenichiro Urairi

IPC分类号： G11B7095

CPC分类号： G11B7/0932 ,  G11B7/0933 ,  G11B7/0935

摘要： An apparatus for driving an objective lens of the present invention includes: a base which is moved along an optical disk; an objective lens disposed so as to be opposed to the optical disk and having an optical axis in a vertical direction with respect to the optical disk, for optically recording information onto the optical disk or optically reproducing information from the optical disk; a holder portion for holding the objective lens; a plurality of elastic arms extending between the base and the holder portion in a tangent direction of the optical disk, for supporting the holder portion movably with respect to the base; and a driving portion for generating an electromagnetic force for moving the holder portion with respect to the base, wherein the elastic arms are disposed away from each other in a vertical direction, the base includes each movable portion for supporting one end of each of the elastic arms, and each of the movable portions is supported at each position in a vertical direction outside of one end of each of the elastic arms, so as to be elastically pivotable around each axis in a radius direction of the optical disk.

摘要翻译： 本发明的用于驱动物镜的装置包括：沿着光盘移动的基座; 物镜，其设置成与光盘相对并且在相对于光盘的垂直方向上具有光轴，用于将信息光学地记录到光盘上或从光盘再现信息; 用于保持物镜的保持器部分; 多个弹性臂，在所述基座和所述保持部之间沿所述光盘的切线方向延伸，用于相对于所述基座可移动地支撑所述保持部; 以及用于产生用于相对于基座移动保持器部分的电磁力的驱动部分，其中弹性臂在垂直方向上彼此远离地设置，所述基座包括用于支撑每个弹性体的一端的每个可移动部分 臂，并且每个可动部分在每个弹性臂的一端的垂直方向的每个位置处被支撑，以便能够围绕每个轴在光盘的半径方向上弹性地枢转。

公开(公告)号：US06791772B2

公开(公告)日：2004-09-14

申请号：US10397810

申请日：2003-03-25

申请人： Kanji Wakabayashi ,  Hiroshi Yamamoto ,  Yoshihiro Ikawa

发明人： Kanji Wakabayashi ,  Hiroshi Yamamoto ,  Yoshihiro Ikawa

IPC分类号： G02B702

CPC分类号： G11B7/0935 ,  G11B7/093 ,  G11B7/0933

摘要： An objective lens driver includes a movable body, a base, a supporting portion, a first multipolar magnet and a second multipolar magnet. The movable body includes an objective lens, a lens holder, and a coil substrate. The coil substrate includes a focusing coil and a tracking coil. The supporting portion allows the movable body to move in a focusing direction and a tracking direction with respect to the base. The focusing direction is parallel to the optical axis of the objective lens, while the tracking direction is perpendicular to the focusing direction. The first and second multipolar magnets sandwich the coil substrate between them. The focusing and tracking coils are arranged as two flat coils on two mutually parallel separate planes so as to overlap with each other at least partially in a direction that is perpendicular to the focusing and tracking directions.

摘要翻译： 物镜驱动器包括可移动体，基座，支撑部分，第一多极磁体和第二多极磁体。 可移动体包括物镜，透镜保持器和线圈基板。 线圈基板包括聚焦线圈和跟踪线圈。 支撑部分允许可移动体相对于基座在聚焦方向和跟踪方向上移动。 聚焦方向平行于物镜的光轴，而跟踪方向垂直于聚焦方向。 第一和第二多极磁体将线圈基板夹在它们之间。 聚焦和跟踪线圈在两个相互平行的分开的平面上被布置为两个扁平线圈，以便至少部分地在垂直于聚焦和跟踪方向的方向上彼此重叠。

公开(公告)号：US5905255A

公开(公告)日：1999-05-18

申请号：US7145

申请日：1998-01-14

申请人： Kanji Wakabayashi ,  Hitoshi Fujii ,  Hiroshi Yamamoto ,  Jouji Anzai ,  Yasumasa Shibata

发明人： Kanji Wakabayashi ,  Hitoshi Fujii ,  Hiroshi Yamamoto ,  Jouji Anzai ,  Yasumasa Shibata

IPC分类号： G11B7/09 ,  G11B7/095 ,  G02B7/04

CPC分类号： G11B7/0956 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/093 ,  G11B7/0932

摘要： In a objective lens driver, at least one permanent magnet is mounted on a movable member, and plural yokes, each being wound with a coil having its winding axis in the focusing direction, are disposed facing the permanent magnet. The yokes are arranged almost symmetrically about a plane including the center of gravity of the movable member and being perpendicular to the tracking direction. In this structure, even when the movable member moves in the tracking direction, since the permanent magnet (a magnetic field source) also moves with the movable member, the distribution of magnetic flux density that contributes to the drive also shifts according to the movement of the movable member, so that the distribution of magnetic flux density maintains being almost symmetrical about the center of gravity of the movable member. Accordingly, in tilt drive, a constant sensitivity to tilt drive is obtained regardless of the position of the movable member. Further, since the rotation axis of tilt drive is fixed, there arises no crosstalk of displacement in the focusing direction and the tracking direction. Furthermore, since the point of action of driving force on the movable member is fixed, there arises no crosstalk of angular displacement in the tilt direction due to focusing drive and tracking drive. Consequently, stable focusing control, tracking control and tilt correction control are realized in an objective lens driver capable of correcting a tilt.

摘要翻译： 在物镜驱动器中，至少一个永久磁铁被安装在可动件上，并且每个缠绕有沿聚焦方向的卷绕轴的线圈的多个轭设置成面向永磁体。 轭围绕包括可动构件的重心且垂直于跟踪方向的平面几乎对称地布置。 在该结构中，即使可动部件沿跟踪方向移动，由于永磁体（磁场源）也随着可动部件移动，所以有助于驱动的磁通密度的分布也根据 可动构件，使得磁通密度的分布保持关于可移动构件的重心几乎对称。 因此，在倾斜驱动中，无论移动部件的位置如何，都能够获得对倾斜驱动的恒定灵敏度。 此外，由于倾斜驱动的旋转轴是固定的，所以在聚焦方向和跟踪方向上不产生位移的串扰。 此外，由于可动构件上的驱动力的作用点是固定的，所以由于聚焦驱动和跟踪驱动，不会产生倾斜方向上的角位移的串扰。 因此，可以在能够校正倾斜的物镜驱动器中实现稳定的聚焦控制，跟踪控制和倾斜校正控制。

公开(公告)号：US20090072818A1

公开(公告)日：2009-03-19

申请号：US11918613

申请日：2006-04-18

申请人： Osamu Mizuno ,  Hiroshi Yamamoto ,  Takuya Wada ,  Hideki Aikoh ,  Kanji Wakabayashi ,  Takatoshi Yukimasa

发明人： Osamu Mizuno ,  Hiroshi Yamamoto ,  Takuya Wada ,  Hideki Aikoh ,  Kanji Wakabayashi ,  Takatoshi Yukimasa

IPC分类号： G01B7/14

CPC分类号： G01D5/145 ,  G11B7/08505 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0013

摘要： As imaging devices are miniaturized, and optical devices are miniaturized, lens moving mechanisms are also miniaturized. Thus, position sensors for them are required to be miniaturized and have high accuracy at low cost. A magnet 2 of a pillar shape and a yoke 3 which move in X axis direction with respect to a magnetic field detection element 1 are provided, and a shape of a cross section of the yoke 3 which is orthogonal to a longitudinal direction of the magnet 2 changes along the longitudinal direction.

摘要翻译： 随着成像装置小型化，光学装置小型化，透镜移动机构也小型化。 因此，它们的位置传感器需要小型化并且以低成本具有高精度。 设置有相对于磁场检测元件1在X轴方向上移动的柱状的磁体2和磁轭3，并且与磁体的长度方向正交的磁轭3的截面形状 2沿纵向变化。

公开(公告)号：US08299782B2

公开(公告)日：2012-10-30

申请号：US11918613

申请日：2006-04-18

申请人： Osamu Mizuno ,  Hiroshi Yamamoto ,  Takuya Wada ,  Hideki Aikoh ,  Kanji Wakabayashi ,  Takatoshi Yukimasa

发明人： Osamu Mizuno ,  Hiroshi Yamamoto ,  Takuya Wada ,  Hideki Aikoh ,  Kanji Wakabayashi ,  Takatoshi Yukimasa

IPC分类号： G01B7/14

CPC分类号： G01D5/145 ,  G11B7/08505 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0013

摘要： As imaging devices are miniaturized, and optical devices are miniaturized, lens moving mechanisms are also miniaturized. Thus, position sensors for them are required to be miniaturized and have high accuracy at low cost. A magnet of a pillar shape and a yoke which move in the X axis direction with respect to a magnetic field detection element are provided, and a shape of a cross section of the yoke which is orthogonal to a longitudinal direction of the magnet changes along the longitudinal direction.

摘要翻译： 随着成像装置小型化，光学装置小型化，透镜移动机构也小型化。 因此，它们的位置传感器需要小型化并且以低成本具有高精度。 提供了相对于磁场检测元件沿X轴方向移动的柱状磁轭和磁轭，并且与磁体的长度方向正交的轭的截面形状沿着 纵向。

公开(公告)号：US20110305131A1

公开(公告)日：2011-12-15

申请号：US13217787

申请日：2011-08-25

申请人： Fumitomo Yamasaki ,  Kanji Wakabayashi ,  Yoshiaki Komma ,  Toshiyasu Tanaka

发明人： Fumitomo Yamasaki ,  Kanji Wakabayashi ,  Yoshiaki Komma ,  Toshiyasu Tanaka

IPC分类号： G11B7/00

CPC分类号： G11B7/1387 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/24038 ,  G11B7/24079 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical disk compliant with both a conventional optical disk such as a BD, HD DVD, and the like and a next-generation high-density optical disk according to a near-field light recording system and the like is provided.An information recording medium includes a first information recording layer and a second information recording layer, to/from which information is recorded or reproduced using laser beam. The first information recording layer is formed at a laser beam entrance surface, and is configured so that information can be recorded thereupon and/or reproduced therefrom using a first objective lens having a first numerical aperture NA1 and laser beam of a first wavelength λ1. The second information recording layer is formed so as to have a distance to the laser beam entrance surface is 0.05 mm to 1.2 mm and is configured so that information can be recorded thereupon and/or reproduced therefrom using a second objective lens having a second numerical aperture NA2 and laser beam of a second wavelength λ2. When a diffraction limit δ2, determined by the numerical aperture NA2 and the second wavelength λ2, is taken as δ2=0.61×λ2/NA2, a track pitch Tp1 of a track formed on the first information recording layer is Tp1

摘要翻译： 提供了兼容诸如BD，HD DVD等常规光盘的光盘以及根据近场光记录系统等的下一代高密度光盘。 信息记录介质包括第一信息记录层和第二信息记录层，使用激光束对信息进行记录或再现。 第一信息记录层形成在激光束入射面上，并且被配置为使用具有第一数值孔径NA1和第一波长λ1的激光束的第一物镜可以在其上记录和/或从其再现信息。 第二信息记录层被形成为具有到激光束入射面的距离为0.05mm至1.2mm，并且被配置为使得可以使用具有第二数值孔径的第二物镜在其上记录和/或从其再现信息 NA2和第二波长λ2的激光束。 当由数值孔径NA2和第二波长λ2确定的衍射极限δ2作为δ2= 0.61×λ2/ NA2时，形成在第一信息记录层上的轨道的轨道间距Tp1为Tp1 <δ2。

公开(公告)号：US08064296B2

公开(公告)日：2011-11-22

申请号：US12415033

申请日：2009-03-31

申请人： Fumitomo Yamasaki ,  Yoshiaki Komma ,  Toshiyasu Tanaka ,  Kanji Wakabayashi

发明人： Fumitomo Yamasaki ,  Yoshiaki Komma ,  Toshiyasu Tanaka ,  Kanji Wakabayashi

IPC分类号： G11B11/00

CPC分类号： G11B7/1395 ,  G11B7/1275 ,  G11B2007/0006

摘要： An optical head is provided with a light source for emitting a first laser beam having a first wavelength shorter than 430 nm, a two-wavelength light source for emitting a second laser beam having a second wavelength equal to or longer than 430 nm, a flat beam splitter in the form of a single plate for reflecting the first laser beam emitted from the light source, a wedge prism in the form of a single plate for reflecting the first laser beam reflected by the flat beam splitter and transmitting the second laser beam emitted from the two-wavelength light source, and an objective lens for focusing the first laser beam reflected by the wedge prism on an information recording surface of a BD. The light source is arranged such that the optical axis of the first laser beam emitted from the light source is inclined with respect to that of the second laser beam emitted from the two-wavelength light source. By this construction, the miniaturization of the optical head can be realized.

摘要翻译： 光头设置有用于发射第一波长短于430nm的第一激光束的光源，用于发射第二波长等于或大于430nm的第二激光束的双波长光源，平坦 用于反射从光源发射的第一激光束的单板形式的分束器，以单个板形式的楔形棱镜，用于反射由平面分束器反射的第一激光束并透射发射的第二激光束 和用于将由楔形棱镜反射的第一激光束聚焦在BD的信息记录表面上的物镜。 光源被布置成使得从光源发射的第一激光束的光轴相对于从双波长光源发射的第二激光束的光轴倾斜。 通过这种结构，可以实现光学头的小型化。