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    Optical pickup device
    1.
    发明授权
    Optical pickup device 失效
    光学拾取装置

    公开(公告)号：US07609606B2

    公开(公告)日：2009-10-27

    申请号：US11302343

    申请日：2005-12-14

    申请人： Kenji Nagatomi ,  Seiji Kajiyama ,  Yoichi Tsuchiya

    发明人： Kenji Nagatomi ,  Seiji Kajiyama ,  Yoichi Tsuchiya

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1381 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1378 ,  G11B7/1398 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： Provided is an optical pickup device capable of suppressing an increase in the number of parts and complication of an optical system while a diffraction grating is used as an optical axis correcting element. Three kinds of blue, red, and infrared laser light beams are emitted from laser element provided in the same CAN package. A blue light emitting point (wavelength: 405 nm) and an infrared light emitting point (wavelength: 780 nm) are arranged in a layer forming direction of the laser elements such that an interval (d2) between the light emitting points becomes shorter than an interval (d1) between each of the light emitting points and a red light emitting point. An optical axis of the laser light beam emitted from the red light emitting point (wavelength: 650 nm) is aligned with an optical axis of the laser light beam emitted from the blue or infrared light emitting point by using the diffraction grating. The number of diffraction gratings for optical axis correction can be made to one and a single photo detector can be commonly used for laser light beams having different wavelengths.

    摘要翻译： 提供了一种能够抑制在使用衍射光栅作为光轴校正元件的情况下部件数量增加和光学系统的复杂性的光学拾取装置。 从相同CAN封装中提供的激光元件发射三种蓝色，红色和红外激光束。 在激光元件的层形成方向上布置蓝色发光点（波长：405nm）和红外发光点（波长：780nm），使得发光点之间的间隔（d2）比 每个发光点和红色发光点之间的间隔（d1）。 从红色发光点（波长：650nm）发射的激光束的光轴与通过使用衍射光栅从蓝色或红外光发射点发射的激光束的光轴对准。 用于光轴校正的衍射光栅的数量可以制成一个，并且单个光电检测器可以被普遍用于具有不同波长的激光束。

    Optical pickup device
    2.
    发明申请
    Optical pickup device 失效
    光学拾取装置

    公开(公告)号：US20060140078A1

    公开(公告)日：2006-06-29

    申请号：US11302343

    申请日：2005-12-14

    申请人： Kenji Nagatomi ,  Seiji Kajiyama ,  Yoichi Tsuchiya

    发明人： Kenji Nagatomi ,  Seiji Kajiyama ,  Yoichi Tsuchiya

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1381 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1378 ,  G11B7/1398 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： Provided is an optical pickup device capable of suppressing an increase in the number of parts and complication of an optical system while a diffraction grating is used as an optical axis correcting element. Three kinds of blue, red, and infrared laser light beams are emitted from laser element provided in the same CAN package. A blue light emitting point (wavelength: 405 nm) and an infrared light emitting point (wavelength: 780 nm) are arranged in a layer forming direction of the laser elements such that an interval (d2) between the light emitting points becomes shorter than an interval (d1) between each of the light emitting points and a red light emitting point. An optical axis of the laser light beam emitted from the red light emitting point (wavelength: 650 nm) is aligned with an optical axis of the laser light beam emitted from the blue or infrared light emitting point by using the diffraction grating. The number of diffraction gratings for optical axis correction can be made to one and a single photo detector can be commonly used for laser light beams having different wavelengths.

    摘要翻译： 提供了一种能够抑制在使用衍射光栅作为光轴校正元件的情况下部件数量增加和光学系统的复杂性的光学拾取装置。 从相同CAN封装中提供的激光元件发射三种蓝色，红色和红外激光束。 在激光元件的层形成方向上布置蓝色发光点（波长：405nm）和红外发光点（波长：780nm），使得发光点之间的间隔（d 2）变得短于 每个发光点和红色发光点之间的间隔（d 1）。 从红色发光点（波长：650nm）发射的激光束的光轴与通过使用衍射光栅从蓝色或红外光发射点发射的激光束的光轴对准。 用于光轴校正的衍射光栅的数量可以制成一个，并且单个光电检测器可以被普遍用于具有不同波长的激光束。

    Optical pickup device and recording and/or reproducing device
    3.
    发明授权
    Optical pickup device and recording and/or reproducing device 有权
    光学拾取装置和记录和/或再现装置

    公开(公告)号：US07209415B2

    公开(公告)日：2007-04-24

    申请号：US10689655

    申请日：2003-10-22

    申请人： Kenji Nagatomi ,  Seiji Kajiyama ,  Yoichi Tsuchiya

    发明人： Kenji Nagatomi ,  Seiji Kajiyama ,  Yoichi Tsuchiya

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1369 ,  G11B7/0948 ,  G11B7/1378 ,  G11B7/13927 ,  G11B2007/13727

    摘要： Provided are an optical pickup device, which is capable of detecting and correcting spherical aberration while suppressing an increase in the number of construction elements and without increasing outer dimensions of a pickup device main body, and a recording and/or reproducing device having the optical pickup device built therein. A lens is designed such that when the thickness of a disk protective layer is greater than an optimum value, returning light (reflection light) from a disk is condensed on a sensor. The sensor is arranged at a condensing point and has a shape with which around 50% of the returning light is received when the thickness of the protective layer assumes the optimum value. With this construction, the quantity of light received by the sensor is increased when the thickness of the protective layer is greater than the optimum value, and is conversely reduced when the thickness of the protective layer is smaller than the optimum value. As a result, it becomes possible to detect the direction and degree of a thickness error with reference to the magnitude of an output from the sensor and to correct spherical aberration based on a result of the detection.

    摘要翻译： 提供一种光学拾取装置，其能够在抑制构造元件的数量的增加并且不增加拾取装置主体的外部尺寸的同时检测和校正球面像差，以及具有光学拾取器的记录和/或再现装置 装置内置。 透镜被设计成使得当盘保护层的厚度大于最佳值时，来自盘的返回光（反射光）会聚集在传感器上。 传感器布置在聚光点处，并且具有当保护层的厚度呈现最佳值时约50％的返回光被接收的形状。 利用这种结构，当保护层的厚度大于最佳值时，由传感器接收的光量增加，并且当保护层的厚度小于最佳值时相反减小。 结果，可以根据传感器的输出的大小来检测厚度误差的方向和程度，并根据检测结果校正球面像差。

    Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
    4.
    发明授权
    Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 有权
    光盘记录/再现装置根据不同的标准向/从光盘记录/再现信息

    公开(公告)号：US6122242A

    公开(公告)日：2000-09-19

    申请号：US474907

    申请日：1999-12-29

    申请人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    发明人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    IPC分类号： G11B7/00 ,  G11B7/013 ,  G11B7/135 ,  G11B19/12

    CPC分类号： G11B7/24085 ,  G11B19/12 ,  G11B7/1369 ,  G11B7/139 ,  G11B2007/0006

    摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.

    摘要翻译： 一种光盘再现装置，包括：半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜;偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面 光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。 在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。

    Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
    6.
    发明授权
    Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 有权
    光盘记录/再现装置根据不同的标准向/从光盘记录/再现信息

    公开(公告)号：US6167019A

    公开(公告)日：2000-12-26

    申请号：US474554

    申请日：1999-12-29

    申请人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    发明人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura

    IPC分类号： G11B7/00 ,  G11B7/013 ,  G11B7/135 ,  G11B19/12

    CPC分类号： G11B7/24085 ,  G11B7/1369 ,  G11B7/139 ,  G11B19/12 ,  G11B2007/0006

    摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.

    摘要翻译： 一种光盘再现装置，包括半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜，偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面 光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。 在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。

    SEMICONDUCTOR LASER APPARATUS, METHOD OF MANUFACTURING SEMICONDUCTOR LASER APPARATUS, AND OPTICAL PICKUP APPARATUS
    10.
    发明申请
    SEMICONDUCTOR LASER APPARATUS, METHOD OF MANUFACTURING SEMICONDUCTOR LASER APPARATUS, AND OPTICAL PICKUP APPARATUS 失效
    半导体激光装置，制造半导体激光装置的方法和光学拾取装置

    公开(公告)号：US20090116529A1

    公开(公告)日：2009-05-07

    申请号：US12348573

    申请日：2009-01-05

    申请人： Masayuki HATA ,  Yasuyuki Bessho ,  Yasuhiko Nomura ,  Masayuki Shono ,  Kenji Nagatomi ,  Yoichi Tsuchiya

    发明人： Masayuki HATA ,  Yasuyuki Bessho ,  Yasuhiko Nomura ,  Masayuki Shono ,  Kenji Nagatomi ,  Yoichi Tsuchiya

    IPC分类号： H01S5/00

    CPC分类号： H01S5/4043 ,  H01L2224/48091 ,  H01S5/02212 ,  H01S5/02272 ,  H01S5/02276 ,  H01S5/4087 ,  H01L2924/00014

    摘要： A monolithic red/infrared semiconductor laser device is joined to a blue-violet semiconductor laser device. The distance between a blue-violet emission point in the blue-violet semiconductor laser device and an infrared emission point in an infrared semiconductor laser device is significantly shorter than the distance between a red emission point in a red semiconductor laser device and the infrared emission point. A blue-violet laser beam, a red laser beam, and an infrared laser beam respectively emitted from the blue-violet emission point, the red emission point, and the infrared emission point are introduced into a photodetector after being incident on an optical disk by an optical system comprising a polarizing beam splitter, a collimator lens, a beam expander, a λ/4 plate, an objective lens, a cylindrical lens, and an optical axis correction element.

    摘要翻译： 单片红/红外半导体激光器件连接到蓝紫色半导体激光器件。 蓝紫色半导体激光装置中的蓝紫色发射点与红外线半导体激光装置的红外线发射点之间的距离明显短于红色半导体激光装置的红色发射点与红外线发射点 。 从蓝紫色发射点，红色发射点和红外线发射点分别发射的蓝紫色激光束，红色激光束和红外激光束被入射到光盘上之后被引入光电检测器 包括偏振分束器，准直透镜，光束扩展器，λ/ 4板，物镜，柱面透镜和光轴校正元件的光学系统。