公开(公告)号：USRE40371E1

公开(公告)日：2008-06-10

申请号：US09726436

申请日：2000-12-01

申请人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Akira Suzuki

发明人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Akira Suzuki

IPC分类号： G11B7/00

CPC分类号： B82Y10/00 ,  G11B7/0935 ,  G11B7/1374 ,  G11B7/24 ,  G11B11/10543 ,  G11B11/10576 ,  G11B2007/13727

摘要： An optical disc recording/reproduction apparatus for recording and/or reproducing a data by applying a beam from an optical head unit through a substrate onto/from a recording layer of the optical disc through, wherein the substrate of the optical disc is 0.3 mm or below; the optical head unit comprises: an objective lens for converging an incident beam and emitting the beam toward the optical disc; a forward lens for converging the beam introduced through the objective lens and applying the beam to the optical disc; a lens holder where the objective lens and the forward lens are fixed; and an actuator for driving the objective lens and the forward lens as a unitary block and controlling at least focusing, the objective lens and the forward lens having a total numerical aperture of 0.8 or above.

摘要翻译： 一种光盘记录/再现装置，用于通过将来自光学头单元的光束通过衬底施加到/从光盘的记录层通过光盘的记录层而记录和/或再现数据，其中光盘的基板为0.3mm或 下面; 光头单元包括：用于会聚入射光束并将光束朝向光盘发射的物镜; 用于会聚通过物镜引入的光束并将光束施加到光盘的前向透镜; 固定有物镜和前透镜的透镜保持架; 以及用于将物镜和前透镜驱动为整体块并且至少控制聚焦的致动器，物镜和前透镜具有0.8或更高的总数值孔径。

公开(公告)号：US6055113A

公开(公告)日：2000-04-25

申请号：US35138

申请日：1998-03-05

申请人： Kenji Yamamoto ,  Isao Ichimura ,  Fumisada Maeda ,  Toshio Watanabe ,  Akira Suzuki ,  Kiyoshi Ohsato

发明人： Kenji Yamamoto ,  Isao Ichimura ,  Fumisada Maeda ,  Toshio Watanabe ,  Akira Suzuki ,  Kiyoshi Ohsato

IPC分类号： G11B7/135 ,  G11B7/22 ,  G02B7/02

CPC分类号： G11B7/22 ,  G11B7/1374 ,  G11B2007/13727

摘要： This invention intends to provide an optical pickup of which it is possible to limit aberrations within a tolerable limit without incorporating a special device for that purpose even if errors arise in thickness of component lenses of a two-lens system constituting an element of the pickup. This object is achieved by providing an optical pickup incorporating a two-lens system with first and second lenses 13 and 14 being arranged in the following manner: the first lens has a first surface 15 to receive a laser beam radiated from a semiconductor laser and a second surface 16 to direct the laser beam transmitted from the first surface 15 towards the second lens 14; the second lens 14 has a third surface 17 to receive the light flux transmitted from the second surface 16 and a fourth surface 18 to direct the light flux transmitted from the third surface 17 towards an optical disc placed opposite thereto; and the first and fourth surfaces are used as a reference during positioning.

摘要翻译： 本发明旨在提供一种光拾取器，即使在构成拾取器的元件的双透镜系统的分量透镜的厚度上出现误差，也可以将像差限制在可容许极限内，而不需要用于该目的的特殊装置。 该目的通过提供一种包含双透镜系统的光学拾取器来实现，其中第一和第二透镜13和14以如下方式布置：第一透镜具有第一表面15，以接收从半导体激光器辐射的激光束和 第二表面16，用于将从第一表面15传递的激光束引向第二透镜14; 第二透镜14具有第三表面17，用于接收从第二表面16传播的光束和第四表面18，以将从第三表面17传播的光束朝向与其相对放置的光盘; 并且在定位期间将第一和第四表面用作参考。

公开(公告)号：US06292453B1

公开(公告)日：2001-09-18

申请号：US08994454

申请日：1997-12-19

申请人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Akira Suzuki

发明人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Akira Suzuki

IPC分类号： G11B700

CPC分类号： G11B7/1374 ,  G11B7/08505 ,  G11B7/0908 ,  G11B7/0927 ,  G11B7/0945 ,  G11B7/122 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727

摘要： The present invention provides an optical disc recording/reproduction apparatus and method capable of carrying out an accurate recording or reproduction when using a lens unit consisting of at least two lenses, which comprises: first drive means for driving both of the first lenses and the second lens in a focusing direction; second drive means for relatively driving the second lens with respect to the first lens in the focusing direction; focus servo means for carrying out focus servo by driving the first drive means so as to drive both of the first lens and the second lens in the focusing direction; and jog mode adjustment means for driving the second drive means after the focus servo is locked, so as to carry out a jog mode adjustment of the position of the second lens with respect to the first lens.

摘要翻译： 本发明提供了一种当使用由至少两个透镜组成的透镜单元时能够执行精确记录或再现的光盘记录/再现装置和方法，其包括：第一驱动装置，用于驱动第一透镜和第二透镜 透镜在聚焦方向上; 第二驱动装置，用于在聚焦方向上相对于第一透镜相对地驱动第二透镜; 聚焦伺服装置，用于通过驱动第一驱动装置进行聚焦伺服，以便在聚焦方向上驱动第一透镜和第二透镜; 以及用于在聚焦伺服被锁定之后驱动第二驱动装置的点动模式调节装置，以便执行第二透镜相对于第一透镜的位置的点动模式调整。

公开(公告)号：US6115347A

公开(公告)日：2000-09-05

申请号：US919119

申请日：1997-08-28

申请人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Atsushi Fukumoto ,  Akira Suzuki

发明人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Atsushi Fukumoto ,  Akira Suzuki

IPC分类号： G11B7/09 ,  G11B7/135 ,  G11B7/22 ,  G11B11/105 ,  G11B7/00

CPC分类号： B82Y10/00 ,  G11B11/10543 ,  G11B7/0935 ,  G11B7/1387 ,  G11B7/22 ,  G11B2007/13727 ,  G11B7/0927

摘要： An optical pickup device for improving the numerical aperture of an objective lens and for assuring high-reliability recording/reproduction of information signals. The optical pickup device has a first lens 6 having a curvilinear or planar surface facing an optical recording medium 5 and having the numerical aperture set to a pre-set value, and a second lens 3 arranged for clamping the first lens 6 between t and the optical recording medium 5. The optical pickup device also has a light-converging optical system for converging the reflected light from the surface of the optical recording medium 5 and a first movement unit 2 for moving the first objective lens 6 and the second lens 3 along the direction of the optical axis with respect to the second objective lens 3. The optical pickup device also has a second movement unit 11 for moving the first objective lens 6 along the direction of the optical axis relative to the second objective lens 3 and a fixation unit 12 for fixing the first objective lens 6 moved by the second movement unit 9. The method for adjusting the optical processing device includes a step of adjusting the position along the optical axis of the first objective lens 6 and a step of fixing the position of the first lens 6.

摘要翻译： 一种用于改善物镜的数值孔径并确保信息信号的高可靠性记录/再现的光学拾取装置。 光学拾取装置具有第一透镜6，其具有面向光学记录介质5的曲面或平面表面，并且具有设定为预设值的数值孔径;以及第二透镜3，其布置成将第一透镜6夹在t和 光学记录介质5.光学拾取装置还具有用于会聚来自光学记录介质5的表面的反射光的聚光光学系统和用于沿第一透镜6和第二透镜3移动的第一移动单元2 相对于第二物镜3的光轴的方向。光学拾取装置还具有用于相对于第二物镜3沿着光轴的方向移动第一物镜6的第二移动单元11和固定 用于固定由第二移动单元9移动的第一物镜6的单元12.用于调整光学处理装置的方法包括以下步骤：沿着opti 第一物镜6的cal轴线和固定第一透镜6的位置的步骤。

公开(公告)号：US6097688A

公开(公告)日：2000-08-01

申请号：US811727

申请日：1997-03-06

申请人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Atsushi Fukumoto ,  Akira Suzuki

发明人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Atsushi Fukumoto ,  Akira Suzuki

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/13925 ,  G11B7/1378 ,  G11B11/10543 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727 ,  G11B7/0948

摘要： A recording/reproducing apparatus for an optical recording medium which is used for recording and/or reproducing information on/from the optical recording medium by irradiating the optical recording medium with a laser light using two-group objective lenses comprising at least two lenses as the first and second lenses, is provided so as to comprise a light source emitting the laser light, the first lens for focusing the laser light emitted from the light source, the second lens arranged between the first lens and the optical recording medium, and a device for moving both the first and second lenses relative to each other to change the distance between them in the optical axis direction of the laser beam, so that the moving device moves the second lens to change the distance between the first and second lenses. Consequently, this invention can provide the recording/reproducing apparatus with a larger numerical aperture (NA) and reduce the influence of spherical aberration on the light beam to realize high density recording/reproducing of information signals.

摘要翻译： 一种用于光学记录介质的记录/再现装置，其用于通过使用包括至少两个透镜的两组物镜将激光照射光学记录介质来记录和/或再现信息，作为 第一透镜和第二透镜被设置成包括发射激光的光源，用于聚焦从光源发射的激光的第一透镜，布置在第一透镜和光记录介质之间的第二透镜，以及设备 用于使第一透镜和第二透镜相对于彼此移动以改变它们之间在激光束的光轴方向上的距离，使得移动装置移动第二透镜以改变第一透镜和第二透镜之间的距离。 因此，本发明可以为记录/再现设备提供更大的数值孔径（NA），并且减小球面像差对光束的影响，以实现信息信号的高密度记录/再现。

公开(公告)号：US6041031A

公开(公告)日：2000-03-21

申请号：US994455

申请日：1997-12-19

申请人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Akira Suzuki

发明人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe ,  Akira Suzuki

IPC分类号： G11B7/135 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B11/105 ,  G11B7/00

CPC分类号： B82Y10/00 ,  G11B11/10576 ,  G11B7/0935 ,  G11B7/1374 ,  G11B11/10543 ,  G11B2007/13727 ,  G11B7/24

摘要： An optical disc recording/reproduction apparatus for recording and/or reproducing a data by applying a beam from an optical head unit through a substrate onto/from a recording layer of the optical disc through, wherein the substrate of the optical disc is 0.3 mm or below; the optical head unit comprises: an objective lens for converging an incident beam and emitting the beam toward the optical disc; a forward lens for converging the beam introduced through the objective lens and applying the beam to the optical disc; a lens holder where the objective lens and the forward lens are fixed; and an actuator for driving the objective lens and the forward lens as a unitary block and controlling at least focusing, the objective lens and the forward lens having a total numerical aperture of 0.8 or above.

摘要翻译： 一种光盘记录/再现装置，用于通过将来自光学头单元的光束通过衬底施加到/从光盘的记录层通过光盘的记录层而记录和/或再现数据，其中光盘的基板为0.3mm或 下面; 光头单元包括：用于会聚入射光束并将光束朝向光盘发射的物镜; 用于会聚通过物镜引入的光束并将光束施加到光盘的前向透镜; 固定有物镜和前透镜的透镜保持架; 以及用于将物镜和前透镜驱动为整体块并且至少控制聚焦的致动器，物镜和前透镜具有0.8或更高的总数值孔径。

公开(公告)号：US5828453A

公开(公告)日：1998-10-27

申请号：US812736

申请日：1997-03-06

申请人： Kenji Yamamoto ,  Isao Ichimura ,  Fumisada Maeda ,  Toshio Watanabe ,  Kiyoshi Ohsato

发明人： Kenji Yamamoto ,  Isao Ichimura ,  Fumisada Maeda ,  Toshio Watanabe ,  Kiyoshi Ohsato

IPC分类号： G02B3/00 ,  B29D11/00 ,  G01M11/02 ,  G02B3/02 ,  G02B27/00 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G01B9/02

CPC分类号： G01M11/025 ,  G01M11/0271 ,  G02B27/0025 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A method for designing an objective lens apparatus formed by at least two lenses, a first lens and a second lens, which includes the steps of: measuring aberration which occurs when a light beam is converged by the first lens; setting the first lens is set such that the aberration occurring in the first lens satisfies Marechal's criterion, in accordance with the measurement results; measuring aberration which occurs when a light beam is converged by the first lens and the second lens; and setting the second lens such that the aberrations occurring in the first lens and the second lens satisfy Marechal's criterion, in accordance with the measurement results. Accordingly, an objective lens apparatus with a small aberration and a large numerical aperture NA can be designed by this method.

摘要翻译： 一种用于设计由至少两个透镜，第一透镜和第二透镜形成的物镜设备的方法，包括以下步骤：测量当光束被第一透镜会聚时发生的像差; 设置第一透镜被设置为使得根据测量结果，发生在第一透镜中的像差满足Mar + E，acu e + EE chal's标准; 测量当第一透镜和第二透镜会聚光束时发生的像差; 并且根据测量结果设置第二透镜，使得发生在第一透镜和第二透镜中的像差满足Mar + E，acu e + EE chal's标准。 因此，可以通过该方法设计具有小像差和大数值孔径NA的物镜设备。

公开(公告)号：US5774281A

公开(公告)日：1998-06-30

申请号：US597978

申请日：1996-02-07

申请人： Fumisada Maeda ,  Isao Ichimura ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe

发明人： Fumisada Maeda ,  Isao Ichimura ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe

IPC分类号： G11B7/12 ,  G11B7/135 ,  G02B7/02

CPC分类号： G11B7/13922 ,  G11B7/122 ,  G11B7/1365 ,  G11B7/1374 ,  G11B2007/13727

摘要： An optical pickup device for condensing the light from a light source on a signal recording surface of an optical recording medium, such as an optical disc. A semi-spherical lens of the optical pickup device has a surface 9b facing an optical disc 20 and has a pre-set refractive index. The optical pickup device also has a slider 12 adapted for securing the lens 9 and for being in sliding contact with an optical disc 20, and a spring plate 13 adapted for thrusting and supporting the slider in sliding contact with the optical disc 20. With the optical pickup device, high density reproduction may be realized, while the tolerance value for warping during disc molding or the tolerance value for warping due to moisture absorption may be increased. In addition, the production yield and the degree of freedom in selecting the disc materials may be improved.

摘要翻译： 一种光拾取装置，用于将来自光源的光聚焦在诸如光盘的光记录介质的信号记录表面上。 光学拾取装置的半球形透镜具有面向光盘20的表面9b并且具有预设折射率。 光学拾取装置还具有适于固定透镜9并与光盘20滑动接触的滑块12以及适于推动和支撑滑动件以与光盘20滑动接触的弹簧板13。 可以实现光拾取装置的高密度再现，而盘成型时的翘曲的公差值或由于吸湿引起的翘曲的公差值可能增加。 此外，可以提高选择盘材料的生产率和自由度。

公开(公告)号：US5764613A

公开(公告)日：1998-06-09

申请号：US640209

申请日：1996-04-30

申请人： Kenji Yamamoto ,  Isao Ichimura ,  Fumisada Maeda ,  Toshio Watanabe ,  Kiyoshi Ohsato

发明人： Kenji Yamamoto ,  Isao Ichimura ,  Fumisada Maeda ,  Toshio Watanabe ,  Kiyoshi Ohsato

IPC分类号： G11B7/125 ,  G11B7/135 ,  G11B7/09

CPC分类号： B82Y10/00 ,  G11B7/1374 ,  G11B2007/13727

摘要： An optical pickup apparatus is constructed of an objective lens for condensing a light beam emitted from a light source toward an optical recording medium, and a convex lens arranged between the optical recording medium and the objective lens in which a surface thereof upon which the luminous flux projected from the objective lens is incident is a convex spherical surface with a radius of curvature which is a predetermined value, and another surface thereof which is located near and opposite to a surface portion of the optical recording medium which is a plane. With this arrangement, a tolerance with respect to decentering of the convex lens in connection with the optical axis of the objective lens is increased, so that an occurrence of aberration is reduced.

摘要翻译： 光学拾取装置由用于将从光源发射的光束朝向光学记录介质聚光的物镜和布置在光学记录介质和物镜之间的凸透镜构成，其中其光通量 从物镜入射的是具有预定值的曲率半径的凸球形表面，并且其另一表面位于作为平面的光记录介质的表面部分附近和相对。 利用这种布置，相对于与透镜的光轴相关的凸透镜的偏心度的公差增加，从而减小了像差的发生。

公开(公告)号：US06674696B1

公开(公告)日：2004-01-06

申请号：US09049478

申请日：1998-03-27

申请人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe

发明人： Isao Ichimura ,  Fumisada Maeda ,  Kenji Yamamoto ,  Kiyoshi Ohsato ,  Toshio Watanabe

IPC分类号： G11B700

CPC分类号： G11B7/094 ,  G11B7/0909 ,  G11B2007/0006

摘要： A focus controller for focusing a light beam and positioning the focused light beam onto a signal recording layer of a signal recording media is disclosed. The controller comprises a light beam focusing means having a numerical aperture of 0.6 or more; a focus controlling means for positioning the light beam focused by the light beam focusing means onto the signal recording layer of the recording media; and an offset adjusting means for adjusting an offset between the focused light beam positioned by the focus controlling means and the signal recording layer of the recording media. The controller positions the light beam focused by an objective lens onto the signal recording layer of a recording media; moves the objective lens within a predetermined optical-axial range, detects an amplitude of a signal read from the recording media at either end of the optical-axial range, and adjusts an offset between the focused light beam positioned by the objective lens and the signal recording layer, depending on a difference between the amplitudes of the detected reproduced signal.

摘要翻译： 公开了一种用于聚焦光束并将聚焦的光束定位在信号记录介质的信号记录层上的聚焦控制器。 控制器包括数值孔径为0.6或更大的光束聚焦装置; 聚焦控制装置，用于将由光束聚焦装置聚焦的光束定位到记录介质的信号记录层上; 以及偏移调整装置，用于调节由聚焦控制装置定位的聚焦光束与记录介质的信号记录层之间的偏移。 控制器将由物镜聚焦的光束定位在记录介质的信号记录层上; 在预定的光轴范围内移动物镜，检测在光轴范围的任一端从记录介质读取的信号的幅度，并调整由物镜定位的聚焦光束与信号之间的偏移 记录层，取决于检测到的再现信号的振幅之差。