公开(公告)号：US06873588B1

公开(公告)日：2005-03-29

申请号：US09700343

申请日：2000-03-14

申请人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

发明人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

IPC分类号： G11B7/1374 ,  G02B3/08 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G02B3/08 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical head reproduces optical disks of different disk plate thickness thicknesses t1 (0.6 mm) or t2 (1.2 mm) by using light beams of two wavelengths and one object lens. An converging element comprises a central portion and outer portion, wherein the central portion has optimum design plate thickness of 0.6*t1 to t1 and the outer portion has optimum design plate thickness of 0.6 mm. By providing a step difference in the converging element, information can be recorded or reproduced for an information medium of disk plate thickness t1 and for an information medium of disk plate thickness t2, in a state having small side lobes. Alternatively, a step difference is provided in the object lens, and optical distance L2 from a second light source to a condensing optical system is set to 80 to 95% of optical distance L1 from a first light source to the condensing optical system. Alternatively, only light of first wavelength is shielded or diffracted in a ring-like shape.

摘要翻译： 光头通过使用两个波长的光束和一个物镜再现不同盘片厚度t1（0.6mm）或t2（1.2mm）的光盘。 会聚元件包括中心部分和外部部分，其中中心部分具有0.6 * t1至t1的最佳设计板厚度，并且外部部分具有0.6mm的最佳设计板厚度。 通过在会聚元件中提供阶梯差，可以在具有小的旁瓣的状态下，对于盘片厚度t1的信息介质和盘片厚度t2的信息介质来记录或再现信息。 或者，在物镜中设置阶梯差，从第二光源到聚光光学系统的光学距离L2设定为从第一光源到聚光光学系统的光学距离L1的80〜95％。 或者，只有第一波长的光被屏蔽或衍射成环状。

公开(公告)号：US06920102B2

公开(公告)日：2005-07-19

申请号：US10694899

申请日：2003-10-29

申请人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

发明人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

IPC分类号： G11B7/1374 ,  G02B3/08 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G02B3/08 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical head reproduces optical disks of different disk plate thickness t1 (0.6 mm) or t2 (1.2 mm) by using light beams of two wavelengths and one object lens. An converging element comprises a central portion and outer portion, wherein the central portion has optimum design plate thickness of 0.6*t1 to t1 and the outer portion has optimum design plate thickness of 0.6 mm. By providing a step difference in the converging element, information can be recorded or reproduced for an information medium of disk plate thickness t1 and for an information medium of disk plate thickness t2, in a state having small side lobes. Alternatively, a step difference is provided in the object lens, and optical distance L2 from a second light source to a condensing optical system is set to 80 to 95% of optical distance L1 from a first light source to the condensing optical system. Alternatively, only light of first wavelength is shielded or diffracted in a ring-like shape.

摘要翻译： 光头通过使用两个波长的光束和一个物镜来再现不同盘片厚度t 1（0.6mm）或t 2（1.2mm）的光盘。 收敛元件包括中心部分和外部部分，其中中心部分具有0.6 * t 1至t 1的最佳设计板厚度，并且外部部分具有0.6mm的最佳设计板厚度。 通过在会聚元件中提供阶梯差，可以在具有小的旁瓣的状态下，对于盘片厚度t 1的信息介质和盘片厚度t 2的信息介质来记录或再现信息。 或者，在物镜中设置阶梯差，从第二光源到聚光光学系统的光距离L 2设定为从第一光源到聚光光学系统的光学距离L 1的80〜95％。 或者，只有第一波长的光被屏蔽或衍射成环状。

公开(公告)号：US06859428B2

公开(公告)日：2005-02-22

申请号：US10694993

申请日：2003-10-29

申请人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

发明人： Sadao Mizuno ,  Hiroaki Yamamoto ,  Hideki Hayashi ,  Jouji Anzai ,  Tomotada Kamei

IPC分类号： G11B7/1374 ,  G02B3/08 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G02B3/08 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical head reproduces optical disks of different disk plate thickness t1 (0.6 mm) or t2 (1.2 mm) by using light beams of two wavelengths and one object lens. An converging element comprises a central portion and outer portion, wherein the central portion has optimum design plate thickness of 0.6*t1 to t1 and the outer portion has optimum design plate thickness of 0.6 mm. By providing a step difference in the converging element, information can be recorded or reproduced for an information medium of disk plate thickness t1 and for an information medium of disk plate thickness t2, in a state having small side lobes. Alternatively, a step difference is provided in the object lens, and optical distance L2 from a second light source to a condensing optical system is set to 80 to 95% of optical distance L1 from a first light source to the condensing optical system. Alternatively, only light of first wavelength is shielded or diffracted in a ring-like shape.

摘要翻译： 光头通过使用两个波长的光束和一个物镜来再现不同盘片厚度t1（0.6mm）或t2（1.2mm）的光盘。 会聚元件包括中心部分和外部部分，其中中心部分具有0.6 * t1至t1的最佳设计板厚度，并且外部部分具有0.6mm的最佳设计板厚度。 通过在会聚元件中提供阶梯差，可以在具有小的旁瓣的状态下，对于盘片厚度t1的信息介质和盘片厚度t2的信息介质来记录或再现信息。 或者，在物镜中设置阶梯差，从第二光源到聚光光学系统的光学距离L2设定为从第一光源到聚光光学系统的光学距离L1的80〜95％。 或者，只有第一波长的光被屏蔽或衍射成环状。

公开(公告)号：USRE43126E1

公开(公告)日：2012-01-24

申请号：US11529689

申请日：2006-09-28

申请人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

发明人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

IPC分类号： G11G7/00

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.

摘要翻译： 光拾取头设置有光源，用于产生多个衍射光束的衍射装置，用于将衍射光束聚焦到光存储介质上的会聚装置，用于将由光学器件反射的多个光束分支的光束分支装置 存储介质，以及光检测装置，用于输出对应于接收光束的光量的信号。 光检测装置具有主光束光接收部分和副光束光接收部分。 当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时，第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量 反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。 本发明提供了一种光拾取头，即使在使用双层盘的情况下在物镜进行跟踪期间，也不会在TE信号中产生偏移。

公开(公告)号：US06798723B2

公开(公告)日：2004-09-28

申请号：US10163443

申请日：2002-06-04

申请人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

发明人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.

摘要翻译： 光拾取头设置有光源，用于产生多个衍射光束的衍射装置，用于将衍射光束聚焦到光存储介质上的会聚装置，用于将由光学器件反射的多个光束分支的光束分支装置 存储介质，以及光检测装置，用于输出对应于接收光束的光量的信号。 光检测装置具有主光束光接收部分和副光束光接收部分。 当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时，第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量 反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。 本发明提供了一种光拾取头，即使在使用双层盘的情况下在物镜进行跟踪期间，也不会在TE信号中产生偏移。

公开(公告)号：US07123553B2

公开(公告)日：2006-10-17

申请号：US10512897

申请日：2003-05-22

申请人： Eishin Mori ,  Jouji Anzai ,  Hideki Hayashi ,  Yoshiaki Komma

发明人： Eishin Mori ,  Jouji Anzai ,  Hideki Hayashi ,  Yoshiaki Komma

IPC分类号： G11B7/00

CPC分类号： G11B7/123

摘要： A lens support mechanism including a semiconductor laser 10 for emitting a laser beam, an optical head enclosure 3 to which the semiconductor Laser 10 is fixed and located, a collimator lens 21 disposed coaxially with the laser beam emitted from the semiconductor laser 10, a resin cylinder 22 formed in a cylindrical shape so as to fix and locate the collimator lens 21 to the inner surface thereof and a cylindrical member 23 fitted to the resin cylinder 22 on a side of the collimator lens 21 opposite to the semiconductor laser 10 and formed so as to be fixed to the optical head enclosure 3. The cylindrical member 23 has almost the same linear expansion coefficient as that of the optical head enclosure 3.

摘要翻译： 包括用于发射激光束的半导体激光器10，固定和定位半导体激光器10的光头外壳3的透镜支撑机构，与半导体激光器10发射的激光束同轴设置的准直透镜21，树脂 气缸22，其形成为圆筒形状，以将准直透镜21固定并定位到其内表面;以及圆柱形构件23，该圆柱形构件23装配到与半导体激光器10相对的准直透镜21的侧面上的树脂圆柱体22，并形成为 以固定在光头罩3上。 圆柱形构件23具有与光学头罩3相似的线性膨胀系数。

公开(公告)号：US20050190665A1

公开(公告)日：2005-09-01

申请号：US10512897

申请日：2003-05-22

申请人： Eishin Mori ,  Jouji Anzai ,  Hideki Hayashi ,  Yoshiaki Komma

发明人： Eishin Mori ,  Jouji Anzai ,  Hideki Hayashi ,  Yoshiaki Komma

IPC分类号： G11B7/08 ,  G11B7/00 ,  G11B7/1376

CPC分类号： G11B7/123

摘要： A lens support mechanism including a semiconductor laser 10 for emitting a laser beam, an optical head enclosure 3 to which the semiconductor Laser 10 is fixed and located, a collimator lens 21 disposed coaxially with the laser beam emitted from the semiconductor laser 10, a resin cylinder 22 formed in a cylindrical shape so as to fix and locate the collimator lens 21 to the inner surface thereof and a cylindrical member 23 fitted to the resin cylinder 22 on a side of the collimator lens 21 opposite to the semiconductor laser 10 and formed so as to be fixed to the optical head enclosure 3. The cylindrical member 23 has almost the same linear expansion coefficient as that of the optical head enclosure 3.

摘要翻译： 包括用于发射激光束的半导体激光器10，固定和定位半导体激光器10的光头外壳3的透镜支撑机构，与半导体激光器10发射的激光束同轴设置的准直透镜21，树脂 气缸22，其形成为圆筒形状，以将准直透镜21固定并定位到其内表面;以及圆柱形构件23，该圆柱形构件23装配到与半导体激光器10相对的准直透镜21的侧面上的树脂圆柱体22，并形成为 以固定在光头罩3上。 圆柱形构件23具有与光学头罩3相似的线性膨胀系数。

公开(公告)号：US20050072899A1

公开(公告)日：2005-04-07

申请号：US10499804

申请日：2003-05-22

申请人： Jouji Anzai

发明人： Jouji Anzai

IPC分类号： G11B7/095 ,  G11B7/13 ,  G11B7/135 ,  G02B7/04

CPC分类号： G11B7/131 ,  G11B7/0956 ,  G11B7/1353

摘要： Light from a light source (1) is split by an optical splitting means (2) into a main beam and at least two subbeams. A focusing optical system (6) focuses the main beam and the subbeams to the vicinity of an optical disc (7) such that their focal points are different in the direction of the optical axis of the focusing optical system (6) and the direction orthogonal thereto. A detecting means (9) detects relative inclination of the optical disc (7) to the optical axis of the focusing optical system (6) by detecting the spot size on the detecting means (9) of the subbeam reflected off the optical disc (7). Relative inclination of the optical disc (7) to the optical axis of an optical head can thereby be detected with high accuracy without increasing the size or the cost of the optical head.

摘要翻译： 来自光源（1）的光由光分离装置（2）分裂成主光束和至少两个子光束。 聚焦光学系统（6）将主光束和子光束聚焦到光盘（7）的附近，使得它们的焦点在聚焦光学系统（6）的光轴的方向上不同，并且正交的方向 到此。 检测装置（9）通过检测从光盘（7）反射的副光束的检测装置（9）上的光斑尺寸来检测光盘（7）相对于聚焦光学系统（6）的光轴的相对倾斜度 ）。 因此，可以高精度地检测光盘（7）相对于光头的光轴的相对倾斜度，而不增加光学头的尺寸或成本。

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。