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1. 再颁专利

USRE40371E1 Optical disc recording/reproduction apparatus and method 有权
标题翻译：光盘记录/再现装置及方法
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。

2. 发明授权

US06366543B2 Optical pickup for discriminating between and reading different types of optical discs 失效
标题翻译：用于识别和读取不同类型的光盘的光学拾取器
公开(公告)号：US06366543B2
公开(公告)日：2002-04-02
申请号：US09819794
申请日：2001-03-29
申请人： Kamon Uemura , Kiyoshi Ohsato , Akio Yamakawa , Masamichi Utsumi
发明人： Kamon Uemura , Kiyoshi Ohsato , Akio Yamakawa , Masamichi Utsumi
IPC分类号： G11B7095
CPC分类号： G11B19/128 , G11B7/0901 , G11B7/1372 , G11B7/1381 , G11B7/139 , G11B19/12 , G11B2007/0006 , G11B2007/0013
摘要： An optical pickup including a light source for radiating a light beam, a diffraction element for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens for converging the light beams separated by the diffraction element on a signal recording surface of the optical recording medium, a light receiving unit having a four-segment first light receiving portion for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions arranged on both sides of the first light receiving portion for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit for generating a first tracking signal based on respective outputs of the first light receiving portion and for generating a second tracking signal based on outputs of the second and third light receiving portions.
摘要翻译：一种包括用于照射光束的光源的光学拾取器，用于将从光源辐射的光束分成至少三个光束，即主光束和两个侧光束的衍射元件，用于会聚分离的光束的物镜通过光记录介质的信号记录表面上的衍射元件，具有用于接收由光记录介质的记录表面反射的主光束的四段第一光接收部分和第二和第三光接收部分的光接收单元布置在第一光接收部分的两侧，用于接收由光记录介质的记录表面反射的侧光束;以及计算单元，用于基于第一光接收部分的各个输出产生第一跟踪信号，基于第二和第三光接收部分的输出的第二跟踪信号。

3. 发明授权

US06353592B1 Optical recording medium and optical disk device 有权
标题翻译：光记录介质和光盘设备
公开(公告)号：US06353592B1
公开(公告)日：2002-03-05
申请号：US09242911
申请日：1999-06-09
申请人： Toshiyuki Kashiwagi , Tetsuhiro Sakamoto , Kiyoshi Ohsato
发明人： Toshiyuki Kashiwagi , Tetsuhiro Sakamoto , Kiyoshi Ohsato
IPC分类号： G11B724
CPC分类号： G11B7/252 , G11B7/0956 , G11B7/24053 , G11B7/24056 , G11B7/24067 , G11B7/2433 , G11B7/2533 , G11B7/2534 , G11B7/2542 , G11B7/2548 , G11B7/2585 , G11B7/26 , G11B2007/24304
摘要： The present invention provides an optical recording medium including a recording layer and a light-transmitting layer successively formed on one side of a substrate, so that a light is applied from the side of this light-transmitting layer for performing an information recording and/or reproduction. On the opposite side of the substrate not having the light-transmitting layer, a water-proof film consisting of at least one layer is formed. This suppresses the skew, enabling to improve the information recording and/or reproduction characteristics for a higher recording density. Furthermore, if the light-transmitting layer has a thickness t=3 to 177 micrometers in an information signal section of the recording medium, and a thickness fluctuation &Dgr;t ≦±5.26 (&lgr;/NA4) micrometers (wherein NA is a numerical aperture and &lgr; is a wavelength of the recording/reproduction optical system), it is possible to realize a high NA and a high capacity.
摘要翻译：本发明提供了一种光记录介质，其包括依次形成在基板的一侧的记录层和透光层，使得从该透光层的侧面施加光以进行信息记录和/或再生产。在不具有透光层的基板的相反侧，形成由至少一层构成的防水膜。这抑制了偏斜，使得能够改善用于更高记录密度的信息记录和/或再现特性。此外，如果透光层在记录介质的信息信号部分中的厚度t = 3至177微米，并且厚度波动ΔTTAt<=±5.26（lambd / NA4）微米（其中NA是数值孔径，羔羊是记录/再现光学系统的波长），可以实现高NA和高容量。

4. 发明授权

US4612437A Focussing error detecting apparatus for use in an optical disc reproducing device, an auto-focus camera or image-pickup device 失效
标题翻译：用于光盘再现装置，自动对焦照相机或图像拾取装置的聚焦误差检测装置
公开(公告)号：US4612437A
公开(公告)日：1986-09-16
申请号：US577838
申请日：1984-02-07
申请人： Kiyoshi Ohsato
发明人： Kiyoshi Ohsato
IPC分类号： G03B13/36 , G02B7/28 , G02B7/32 , G11B7/09 , G11B7/12
CPC分类号： G11B7/0912 , G02B7/32 , G11B7/0916
摘要： A focussing error detecting apparatus comprises a compound lens and a photodetector, in which the compound lens has first and second lens regions having different back focal lengths separated by a boundary plane which includes the optical axis of light incident on the compound lens. The photodetector has its photodetecting face positioned on the optical axis of the light between the focal points of the two lens regions, and includes first and second photodetecting elements for receiving light passed through the first lens region at its outer and inner sections with respect to the boundary plane, respectively, and third and fourth photodetecting elements for receiving light passed through the second lens region at its outer and inner sections respectively. A focussing error signal is produced from the difference between the sum of signals from the first and fourth photodetecting elements and the sum of signals from the second and third photodetecting elements.
摘要翻译：一种聚焦误差检测装置，包括复合透镜和光电检测器，其中复合透镜具有由包括入射在复合透镜上的光的光轴的边界面分隔的不同后焦距的第一和第二透镜区域。光检测器具有位于两透镜区域的焦点之间的光的光轴上的受光面，并且包括第一和第二光电检测元件，用于接收在其外部和内部相对于第一透镜区域通过第一透镜区域的光分别用于接收在其外部和内部部分穿过第二透镜区域的光的第三和第四光电检测元件。根据来自第一和第四光电检测元件的信号之和与来自第二和第三光电检测元件的信号之和的差产生聚焦误差信号。

5. 发明授权

US4593386A Optical disc player with improved tracking control 失效
标题翻译：光盘播放器具有改进的跟踪控制
公开(公告)号：US4593386A
公开(公告)日：1986-06-03
申请号：US511912
申请日：1983-07-08
申请人： Shinichiro Kuwabara , Kiyoshi Ohsato , Mikio Sugiki
发明人： Shinichiro Kuwabara , Kiyoshi Ohsato , Mikio Sugiki
IPC分类号： G11B7/09 , G11B7/095 , G11B7/13
CPC分类号： G11B7/0941 , G11B7/0956
摘要： In an optical disc player in which a reading light beam is caused to impinge on an optical disc having a record track formed with an alignment of geometric variations such as a plurality of pits provided in response to information to be modulated in intensity by the record track and a photodetector is provided for detecting the reading light beam coming from the optical disc to generate an output varying in response to the variations in intensity of the detected reading light beam; there are provided a first circuit for producing a reproduced information signal having level variations representing the geometric variations and a tracking error signal which may have level variations depending on the size of each segment of the geometric variations on the strength of the output of the photodetector, a second circuit for detecting the duration of a portion corresponding to each segment of the geometric variations of the reproduced information signal or output of the photodetector and extracting selectively the level of the tracking error signal whenever the detected duration is measured within a predetermined time range so as to produce a modified tracking error signal having the extracted level, and a control circuit for performing tracking control in relation to the reading light beam in response to the modified tracking error signal.
摘要翻译：在其中使读取光束撞击在具有记录轨道的光盘上的光盘中，所述光盘具有形成为几何变化的对准的记录轨道，所述记录轨迹形成为响应由记录轨道强度调制的信息而提供的多个凹坑并且提供光电检测器，用于检测来自光盘的读取光束，以产生响应于检测到的读取光束的强度变化而变化的输出; 提供了一种用于产生具有表示几何变化的电平变化的再现信息信号的第一电路和可能具有取决于光电检测器的输出强度的几何变化的每个段的尺寸的电平变化的跟踪误差信号，第二电路，用于检测对应于再现信息信号或输出的光电检测器的几何变化的每个段的部分的持续时间，并且每当在预定时间范围内测量检测到的持续时间时，选择性地提取跟踪误差信号的电平以产生具有所提取的电平的修改的跟踪误差信号，以及用于响应于修改的跟踪误差信号执行与读取光束相关的跟踪控制的控制电路。

6. 发明授权

US6055113A Optical pickup and an optical pickup objective lense assembling method 失效
标题翻译：光学拾取和光学拾取物镜组合方法
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。

7. 发明授权

US5828453A Lens designing method and objective lens apparatus with two lenses 失效
标题翻译：镜头设计方法和具有两个镜头的物镜设备
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。

8. 发明授权

US5774281A Optical pickup device for light collection onto an optical recording medium 失效
标题翻译：用于光收集到光记录介质上的光拾取装置
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。

9. 发明授权

US5764613A optical pickup apparatus 失效
标题翻译：光学拾取装置
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。

10. 发明授权

US5515348A Optical disk pickup device with tilt compensation by electrostriction 失效
标题翻译：具有电致伸缩倾斜补偿的光盘拾取装置
公开(公告)号：US5515348A
公开(公告)日：1996-05-07
申请号：US195694
申请日：1994-02-16
申请人： Kiyoshi Ohsato
发明人： Kiyoshi Ohsato
IPC分类号： G11B7/09 , G11B7/095 , G11B7/135 , G11B11/105
CPC分类号： B82Y10/00 , G11B7/0912 , G11B7/0956 , G11B7/1369 , G11B7/1381 , G11B7/13927 , G11B11/10543 , G11B11/10576 , G11B2007/13727 , G11B7/0908
摘要： An optical pickup is adapted for recording and/or reproducing signals by radiating a light beam from a light source on an optical recording medium via an object lens. The optical pickup includes a light receiving device for receiving a return light from the optical recording medium, and a focusing error detecting unit for detecting an amount of deviation of the focal point along the optical axis. The measurement of a focusing error is based on signals from the light receiving device. The optical pickup further includes an electrostriction device arranged on a path of light outgoing from the light source to the optical recording medium and having a central section and a peripheral section exhibiting a phase difference from each other depending on an applied voltage. Focusing errors may be detected with high accuracy with the optical pickup. A focusing servo device compensates for the focusing error detected by controlling the focal point along the optical axis using a focusing servo device. Depending on error detection signals from the focusing error detection unit, a rough servo is carried out by an the object lens driving unit to the vicinity of the depth of focus, and a fine servo is carried out by the electrostriction device within the range of the depth of focus.
摘要翻译：光拾取器适于通过经由物镜将来自光源的光束照射在光学记录介质上来记录和/或再现信号。光学拾取器包括用于接收来自光学记录介质的返回光的光接收装置，以及用于检测焦点沿光轴的偏离量的聚焦误差检测单元。聚焦误差的测量是基于来自光接收装置的信号。光学拾取器还包括布置在从光源发射到光学记录介质的光的路径上的电致伸装置，并且具有根据所施加的电压彼此呈现相位差的中心部分和周边部分。可以用光学拾取器以高精度检测聚焦误差。聚焦伺服装置通过使用聚焦伺服装置来补偿通过沿光轴控制焦点所检测到的聚焦误差。根据来自聚焦误差检测单元的误差检测信号，通过物镜驱动单元执行粗略伺服到焦深附近，并且在电致伸装置的范围内执行精细伺服焦点深度。

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