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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。
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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
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。
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公开(公告)号：US5828453A
公开(公告)日：1998-10-27
申请号：US812736
申请日：1997-03-06
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。
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4.发明授权
公开(公告)号：US5774281A
公开(公告)日：1998-06-30
申请号：US597978
申请日：1996-02-07
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。
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公开(公告)号：US5764613A
公开(公告)日：1998-06-09
申请号：US640209
申请日：1996-04-30
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。
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公开(公告)号：US06674696B1
公开(公告)日：2004-01-06
申请号：US09049478
申请日：1998-03-27
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。
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7.发明授权Optical recording medium recording and reproducing apparatus and optical pickup device 失效光记录介质记录和再现装置和光学拾取装置
公开(公告)号：US06005834A
公开(公告)日：1999-12-21
申请号：US813346
申请日：1997-03-07
申请人： Fumisada Maeda , Toshio Watanabe , Isao Ichimura , Atsushi Fukumoto , Kenji Yamamoto , Kiyoshi Ohsato
发明人： Fumisada Maeda , Toshio Watanabe , Isao Ichimura , Atsushi Fukumoto , Kenji Yamamoto , Kiyoshi Ohsato
CPC分类号： G11B7/1372 , G11B7/0935 , G11B7/093
摘要： An optical recording medium recording and reproducing apparatus for recording information on an optical recording medium and/or reproducing information therefrom by irradiating the optical recording medium with laser light by the use of a two-group objective lens composed of at least first and second lenses. This apparatus is provided with: a light source for emitting laser light; a first lens for converging laser light emitted from the light source; a second lens interposed between the first lens and the optical recording medium; a detecting unit for detecting a kind of the recording medium; and a movement unit for changing the distance in the direction of an optical axis between the first and second lenses by causing a relative movement between the first and second lenses. Further, the distance between the first and second lenses is changed by the movement unit, which causes the second lens to move, according to a result of a detection, which is performed by the detecting unit. Thereby, the numerical aperture NA of the objective lens is increased. Moreover, the influence of aberration is mitigated. Consequently, the high-density recording and reproducing of information signals can be achieved.
摘要翻译： 一种用于通过使用由至少第一和第二透镜组成的两组物镜通过用激光照射光学记录介质来在光学记录介质上记录信息和/或再现信息的光学记录介质记录和再现装置。 该装置具有：用于发射激光的光源; 用于会聚从光源发射的激光的第一透镜; 插入在第一透镜和光记录介质之间的第二透镜; 检测单元，用于检测记录介质的种类; 以及移动单元，用于通过使第一和第二透镜之间的相对运动来改变在第一和第二透镜之间的光轴方向上的距离。 此外，根据由检测单元执行的检测结果，第一透镜和第二透镜之间的距离被移动单元改变，这导致第二透镜移动。 由此，物镜的数值孔径NA增大。 此外，减轻了像差的影响。 因此，可以实现信息信号的高密度记录和再现。
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公开(公告)号：US5712842A
公开(公告)日：1998-01-27
申请号：US744007
申请日：1996-02-12
CPC分类号： B82Y10/00 , G11B7/1374 , G11B7/13927 , G11B7/0908
摘要： There is provided an optical pick-up device capable of eliminating a spherical aberration due to a thickness error of an optical disc. The optical pick-up device includes a convex lens having a flat surface opposed to a surface of an optical recording medium, and having a predetermined refractive index, and an objective lens disposed such that the convex lens is interposed between said optical recording medium and the objective lens. A position-detecting means detects a position relation between the light-incident surface of the optical recording medium and the flat surface of the convex lens, based on first and second detection signals. A drive means drives the convex lens along an optical axis thereof such that the convex lens is caused to move in the opposite directions toward the optical recording medium or the objective lens, whereby a distance between the light-incident surface of the optical recording medium and the flat surface of the convex lens is controlled based on the first and second detection signals.
摘要翻译： 提供了能够消除由于光盘的厚度误差引起的球面像差的光学拾取装置。 光学拾取装置包括具有与光学记录介质的表面相对的平坦表面并具有预定折射率的凸透镜，并且设置为使得凸透镜插入在所述光学记录介质和 物镜。 位置检测装置基于第一和第二检测信号检测光记录介质的光入射表面和凸透镜的平坦表面之间的位置关系。 驱动装置沿其光轴驱动凸透镜，使得凸透镜沿相反方向朝向光记录介质或物镜移动，由此光记录介质的光入射表面与 基于第一和第二检测信号来控制凸透镜的平坦表面。
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公开(公告)号：US5786947A
公开(公告)日：1998-07-28
申请号：US834147
申请日：1997-04-14
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滑动接触的滑动件12，以及用于推压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。
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公开(公告)号：US06414931B1
公开(公告)日：2002-07-02
申请号：US09159778
申请日：1998-09-24
IPC分类号： G11B700
CPC分类号： G11B7/13927 , G11B7/0927 , G11B7/0948 , G11B7/1378 , G11B2007/13727
摘要： A recording/reproducing apparatus for an optical recording medium in which a laser light beam is illuminated on an optical recording medium using a double-lens type objective lens made up of at least a first lens and a second lens to record and/or reproduce the information. The apparatus includes a first lens for converging the laser light illuminated from a light source, a second lens arranged between the first lens and the optical recording medium and a voice coil motor for causing relative movement of the first and second lenses for varying the distance therebetween in the direction along the optical axis. The first lens is moved to vary the distance between the first and second lenses. This enlarges the numerical aperture and diminishes the effect of aberration to enable high-density recording and/or reproduction of information signals to a high recording density.
摘要翻译： 一种用于光记录介质的记录/再现装置，其中使用由至少第一透镜和第二透镜构成的双透镜型物镜将光束照射在光记录介质上以记录和/或再现 信息。 该装置包括用于会聚从光源照射的激光的第一透镜，布置在第一透镜和光学记录介质之间的第二透镜和用于使第一和第二透镜相对移动以改变其间的距离的音圈电机 沿着光轴的方向。 移动第一透镜以改变第一和第二透镜之间的距离。 这扩大了数值孔径并减小了像差的影响，使信息信号的高密度记录和/或再现成为高记录密度。
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