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126 条记录 (耗时 0.023 秒)

    Optical head
    1.
    发明授权
    Optical head 失效
    光头

    公开(公告)号：US06275463B1

    公开(公告)日：2001-08-14

    申请号：US09064847

    申请日：1998-04-23

    申请人： Takayuki Nagata ,  Akihiro Arai ,  Toru Nakamura ,  Takao Hayashi

    发明人： Takayuki Nagata ,  Akihiro Arai ,  Toru Nakamura ,  Takao Hayashi

    IPC分类号： G11B700

    CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/095 ,  G11B7/13

    摘要： An optical head comprises a photodetector 8 having divided photosensitive areas to detect light 13 reflected from an optical disk 7, means 10, 11, 12 for obtaining track error signal by operating signals from the photosensitive areas. The photodetector 8 has a first division line 9a parallel to an information track on the optical disk and second and third division lines 9b, 9c perpendicular to the first division line 9f and symmetrical to the optical axis. Further, a light-shielding area 8i is provided for shielding a part of the reflected light between the division lines 9b and 9c. The signals are operated to reduce offset of the tracking error signal due to a shift of object lens and a tilt of the optical disk. Accordingly, the optical head of the present invention has a small offset of tracking error signal with a simple structure.

    摘要翻译： 光头包括光电检测器8，光电检测器8具有分离的感光区域，以检测从光盘7反射的光13，用于通过操作来自感光区域的信号来获得轨道误差信号的装置10,11,12。 光电检测器8具有与光盘上的信息轨道平行的第一分割线9a和与第一分割线9f垂直并与光轴对称的第二和第三分割线9b，9c。 此外，设置遮光区域8i以遮蔽分割线9b和9c之间的一部分反射光。 操作信号以减少由于物镜的偏移和光盘倾斜引起的跟踪误差信号的偏移。 因此，本发明的光头具有简单结构的跟踪误差信号的小偏移。

    Optical head
    2.
    发明授权
    Optical head 有权

    公开(公告)号：US06438091B1

    公开(公告)日：2002-08-20

    申请号：US09899204

    申请日：2001-07-06

    申请人： Takayuki Nagata ,  Akihiro Arai ,  Toru Nakamura ,  Takao Hayashi

    发明人： Takayuki Nagata ,  Akihiro Arai ,  Toru Nakamura ,  Takao Hayashi

    IPC分类号： G11B700

    摘要： An optical head comprises a photodetector 8 having divided photosensitive areas to detect light 13 reflected from an optical disk 7, means 10, 11, 12 for obtaining tracking error signal by operating signals from the photosensitive areas. The photodetector 8 has a first division line 9a parallel to an information track on the optical disk and second and third division lines 9b, 9c perpendicular to the first division line 9f and symmetrical to the optical axis. Further, a light-shielding area 8i is provided for shielding a part of the reflected light between the division lines 9b and 9c. The signals are operated to reduce offset of the tracking error signal due to a shift of object lens and a tilt of the optical disk. Accordingly, the optical head of the present invention has a small offset of tracking error signal with a simple structure.

    Integrated optical head with an emitting light splitting polarizing prism and a detecting light splitting polarizing element
    3.
    发明授权
    Integrated optical head with an emitting light splitting polarizing prism and a detecting light splitting polarizing element 失效
    具有发光分光偏振棱镜和检测分光偏振元件的集成光学头

    公开(公告)号：US5790504A

    公开(公告)日：1998-08-04

    申请号：US657741

    申请日：1996-05-31

    申请人： Takao Hayashi ,  Toru Nakamura ,  Akihiro Arai

    发明人： Takao Hayashi ,  Toru Nakamura ,  Akihiro Arai

    IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B11/105 ,  G11B7/08

    CPC分类号： G11B7/1356 ,  G11B11/10543 ,  G11B7/123

    摘要： A magneto-optical pick-up for recording and reproducing information to an information recording medium comprises an optical module comprising an integral light emitting element and receptor element having plural light reception areas, and a diffraction grating on the light incident/emission plane, an objective lens, a polarizing prism provided integrally to the optical module in the light path between the light-emitting element and an objective lens and having the reflectivity and transmittance differing for P-polarized and S-polarized lights, and a polarizing element provided internally or integrally to the optical module which divides the light reflected by or passed through the polarizing prism into light having at least two mutually-perpendicular polarization components to guide the divided lights to the receptor element.

    摘要翻译： 用于向信息记录介质记录和再现信息的磁光拾取器包括：光学模块，包括具有多个光接收区域的整体发光元件和接收元件，以及在光入射/发射平面上的衍射光栅， 透镜，在发光元件和物镜之间的光路中与光学模块整体设置并且具有对于P偏振和S偏振光不同的反射率和透射率的偏振棱镜，以及设置在内部或整体上的偏振元件 涉及将由偏振棱镜反射或通过偏振棱镜的光分成具有至少两个相互垂直的偏振分量的光的光学模块，以将分光引导到受体元件。

    Optical head that detects tilt in an optical disk
    4.
    发明授权
    Optical head that detects tilt in an optical disk 失效
    检测光盘倾斜的光头

    公开(公告)号：US07304920B2

    公开(公告)日：2007-12-04

    申请号：US10312471

    申请日：2001-06-22

    申请人： Akihiro Arai ,  Takao Hayashi ,  Toru Nakamura ,  Takayuki Nagata

    发明人： Akihiro Arai ,  Takao Hayashi ,  Toru Nakamura ,  Takayuki Nagata

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0943 ,  G11B7/0956 ,  G11B7/131

    摘要： An optical head that detects a tilt in an optical disk. The optical head includes a condensing means, a light receiving means, a tracking error signal detection means, and an optical tilt detecting means. The light receiving means includes at least first and second light receiving areas, the first light receiving area being a rectangle having long sides that extend in a direction perpendicular to information tracks on the optical disk. The tracking error signal detection means detect error signals corresponding to light signals received in the first and second light receiving areas. The optical disk tilt detection means compare the tracking error signals to detect a radial tilt in the optical disk. In an alternative embodiment, the long sides of first light receiving area extend in a direction parallel to the information tracks, and the optical disk tilt detecting means detect a tangential tilt in the optical disk.

    摘要翻译： 检测光盘倾斜的光学头。 光头包括聚光装置，光接收装置，跟踪误差信号检测装置和光倾斜检测装置。 光接收装置至少包括第一和第二光接收区域，第一光接收区域是具有沿与光盘上的信息轨道垂直的方向延伸的长边的矩形。 跟踪误差信号检测装置检测对应于在第一和第二光接收区域中接收的光信号的误差信号。 光盘倾斜检测装置比较跟踪误差信号以检测光盘中的径向倾斜。 在替代实施例中，第一光接收区域的长边在与信息轨道平行的方向上延伸，并且光盘倾斜检测装置检测光盘中的切向倾斜。

    Optical head and information recording and reproduction apparatus
    5.
    发明授权
    Optical head and information recording and reproduction apparatus 失效
    光头和信息记录和再现设备

    公开(公告)号：US06185167B2

    公开(公告)日：2001-02-06

    申请号：US09108009

    申请日：1998-06-30

    申请人： Akihiro Arai ,  Takao Hayashi ,  Tohru Nakamura ,  Takayuki Nagata

    发明人： Akihiro Arai ,  Takao Hayashi ,  Tohru Nakamura ,  Takayuki Nagata

    IPC分类号： G11B700

    CPC分类号： G11B7/131 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/094 ,  G11B7/123

    摘要： An optical head is composed of an objective 2, a composite diffraction element 3 having six areas divided by three parting lines 3a to 3c; and a substrate 5 on which a light-emitting element and a plurality of light-receiving elements are arranged. A focus and a tracking error signals are generated based on signals from the light-receiving elements that receive those of a plurality of luminous fluxes divided by the composite diffraction element 3 which result from passage through the portion between the parting lines 3b and 3c. In generating the tracking error signal, signals from the light-receiving elements that receive luminous fluxes resulting from passage through the outside of the parting lines 3b and 3c are used to correct an offset in the tracking error signal caused by the movement of the objective.

    摘要翻译： 光学头由物镜2，复合衍射元件3组成，具有由三个分型线3a至3c分隔的六个区域; 以及配置有发光元件和多个受光元件的基板5。 基于来自光接收元件的信号产生聚焦和跟踪误差信号，所述光接收元件接收由通过分割线3b和3c之间的部分导致的复合衍射元件3分割的多个光束的光束接收元件。 在产生跟踪误差信号时，来自接收由分流线3b和3c的外部通过的光通量的光接收元件的信号用于校正由于物镜的移动引起的跟踪误差信号中的偏移。

    Optical pickup device and optical disk apparatus
    7.
    发明授权
    Optical pickup device and optical disk apparatus 失效
    光拾取装置和光盘装置

    公开(公告)号：US08085645B2

    公开(公告)日：2011-12-27

    申请号：US12724060

    申请日：2010-03-15

    申请人： Akihiro Arai ,  Syougo Horinouchi ,  Hiroshi Shibata

    发明人： Akihiro Arai ,  Syougo Horinouchi ,  Hiroshi Shibata

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1369 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/1378 ,  G11B2007/0006

    摘要： An optical pickup device includes a first laser element that emits first laser light, a second laser element that emits second laser light of which the wavelength is longer than that of the first laser light, an optical path composition element that composes the first laser light and the second laser light to one optical path, a wavelength selective element that acts on the composed first or second laser light; and an objective lens that condenses the first laser light and the second laser light on an optical disk. The magnitude of the power of the wavelength selective element as a lens with respect to the second laser light is larger than the magnitude of the power of the wavelength selective element as a lens with respect to the first laser light. Accordingly, it may be possible to reduce the optical pickup device and the optical disk apparatus in size.

    摘要翻译： 一种光学拾取装置，包括发射第一激光的第一激光元件，发射波长比第一激光长的第二激光的第二激光元件，构成第一激光的光路组成元件和 第二激光到一个光路，作用在组合的第一或第二激光上的波长选择元件; 以及将第一激光和第二激光冷凝在光盘上的物镜。 作为相对于第二激光的透镜的波长选择元件的功率的大小大于相对于第一激光作为透镜的波长选择元件的功率的大小。 因此，可以缩小光拾取装置和光盘装置的尺寸。

    TRACKING CONTROL DEVICE, TRACKING CONTROL METHOD, AND OPTICAL DISC APPARATUS
    8.
    发明申请
    TRACKING CONTROL DEVICE, TRACKING CONTROL METHOD, AND OPTICAL DISC APPARATUS 有权
    跟踪控制装置，跟踪控制方法和光盘装置

    公开(公告)号：US20100309766A1

    公开(公告)日：2010-12-09

    申请号：US12793038

    申请日：2010-06-03

    申请人： Takashi KISHIMOTO ,  Takeharu Yamamoto ,  Yoshirou Kashiwabara ,  Akihiro Arai

    发明人： Takashi KISHIMOTO ,  Takeharu Yamamoto ,  Yoshirou Kashiwabara ,  Akihiro Arai

    IPC分类号： G11B20/18

    CPC分类号： G11B7/0903 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0943 ,  G11B2007/0013

    摘要： The invention provides a tracking control device, a tracking control method, and an optical disc apparatus that enable to stably perform the tracking control, and reduce an influence of stray light from the other layer on the tracking control. A sub push-pull signal correcting section corrects a sub push-pull signal to be generated from returning light of a sub beam in such a manner that a track crossing component of a main push-pull signal to be generated from returning light of a main beam, and a track crossing component of the sub push-pull signal to be generated from the returning light of the sub beam are canceled. A low pass filter reduces a high frequency component of the sub push-pull signal corrected by the sub push-pull signal correcting section. A subtractor subtracts a sub push-pull signal passing the low pass filter from the main push-pull signal to thereby generate a tracking error signal.

    摘要翻译： 本发明提供一种跟踪控制装置，跟踪控制方法和光盘装置，其能够稳定地执行跟踪控制，并且减少来自另一层的杂散光对跟踪控制的影响。 子推挽信号校正部分校正从子光束的返回光产生的副推挽信号，使得从主信号的返回光产生的主推挽信号的轨道交叉分量 并且从副光束的返回光产生的副推挽信号的轨迹交叉分量被消除。 低通滤波器降低由副推挽信号校正部校正的副推挽信号的高频分量。 减法器从主推挽信号中减去通过低通滤波器的副推挽信号，从而产生跟踪误差信号。

    Optical head and optical device provided with optical head
    9.
    发明授权
    Optical head and optical device provided with optical head 有权
    光头和光盘驱动器包括光头

    公开(公告)号：US07706216B2

    公开(公告)日：2010-04-27

    申请号：US10533628

    申请日：2003-11-04

    申请人： Akihiro Arai

    发明人： Akihiro Arai

    IPC分类号： G11B7/00

    CPC分类号： G11B7/13927 ,  G11B7/0901 ,  G11B7/0956 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1381

    摘要： An optical head includes a plurality of light receiving areas, which receive a first type of reflected rays where zero-order and first-order components of the light diffracted by a track are superposed one upon the other to generate a light quantity signal representing the quantity of light of the first type of reflected rays, and a non-light-receiving area, which is provided between the light receiving areas so as not to receive a second type of reflected ray consisting essentially of the zero-order components. As measured in a first direction in which the light receiving areas are arranged, a gap between the light receiving areas is longer than the width of the non-light-receiving area. The optical head further includes a tracking error signal generating section for generating a tracking error signal based on the light quantity signal.

    摘要翻译： 光头包括多个光接收区域，其接收由轨道衍射的光的零级和一级分量彼此重叠的第一类型的反射光线，以产生表示数量的光量信号 第一类反射光线的光和非光接收区域，其被设置在光接收区域之间，以便不接收基本上由零级分量组成的第二类型的反射光线。 如在其中布置有光接收区域的第一方向测量的，光接收区域之间的间隙比非光接收区域的宽度长。 光头还包括跟踪误差信号产生部分，用于基于光量信号产生跟踪误差信号。