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    Optical pickup device and optical disk apparatus using the same
    2.
    发明授权
    Optical pickup device and optical disk apparatus using the same 失效
    光拾取装置和使用其的光盘装置

    公开(公告)号：US07826328B2

    公开(公告)日：2010-11-02

    申请号：US11836260

    申请日：2007-08-09

    申请人： Toyokazu Takahashi

    发明人： Toyokazu Takahashi

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1376 ,  G11B7/1378 ,  G11B7/13925

    摘要： An optical pickup device includes: a light source that emits a light beam; a divergence-angle converting lens that converts an angle of divergence of the light beam emitted from the light source and emits the light beam; and an object lens displaceable in a tracking direction that receives incidence of the light beam, the angle of divergence of which is converted by the divergence-angle converting lens, and converges and emits the light beam, wherein spherical aberration equivalent to an amount that can offset astigmatism caused when the object lens is displaced is given to the divergence-angle converting leans, and spherical aberration that can offset the spherical aberration given to the divergence-angle converting leans is given to the object lens and comatic aberration that can offset comatic aberration caused by the spherical aberration given to the divergence-angle converting lens when the object lens is displaced is given to the object lens.

    摘要翻译： 光拾取装置包括：发射光束的光源; 发散角转换透镜，其转换从光源发射的光束的发散角并发射光束; 以及能够沿跟踪方向移动的物镜，其接收光束的入射，其发散角由发散角转换透镜转换，并且会聚并发射光束，其中球面像差等于可以 对于发散角转换倾角给出了当物镜移位时引起的偏移散光，并且可以偏移给发散角转换倾角的球面像差的球面像差被赋予可以抵消彗形像差的物镜和彗形像差 当物镜移动时，由发散角转换透镜产生的球面像差产生。

    OPTICAL PICKUP DEVICE AND OPTICAL DISK APPARATUS USING THE SAME
    3.
    发明申请
    OPTICAL PICKUP DEVICE AND OPTICAL DISK APPARATUS USING THE SAME 失效
    光学拾取装置和使用该光学装置的光盘装置

    公开(公告)号：US20080062848A1

    公开(公告)日：2008-03-13

    申请号：US11836260

    申请日：2007-08-09

    申请人： Toyokazu TAKAHASHI

    发明人： Toyokazu TAKAHASHI

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1376 ,  G11B7/1378 ,  G11B7/13925

    摘要： An optical pickup device includes: a light source that emits a light beam; a divergence-angle converting lens that converts an angle of divergence of the light beam emitted from the light source and emits the light beam; and an object lens displaceable in a tracking direction that receives incidence of the light beam, the angle of divergence of which is converted by the divergence-angle converting lens, and converges and emits the light beam, wherein spherical aberration equivalent to an amount that can offset astigmatism caused when the object lens is displaced is given to the divergence-angle converting leans, and spherical aberration that can offset the spherical aberration given to the divergence-angle converting leans is given to the object lens and comatic aberration that can offset comatic aberration caused by the spherical aberration given to the divergence-angle converting lens when the object lens is displaced is given to the object lens.

    摘要翻译： 光拾取装置包括：发射光束的光源; 发散角转换透镜，其转换从光源发射的光束的发散角并发射光束; 以及能够沿跟踪方向移动的物镜，其接收光束的入射，其发散角由发散角转换透镜转换，并且会聚并发射光束，其中球面像差等于可以 对于发散角转换倾角给出了当物镜移位时引起的偏移散光，并且可以偏移给发散角转换倾角的球面像差的球面像差被赋予可以抵消彗形像差的物镜和彗形像差 当物镜移动时，由发散角转换透镜产生的球面像差产生。

    Optical pickup-use object lens, optical pickup and optical disk unit
    4.
    发明授权
    Optical pickup-use object lens, optical pickup and optical disk unit 失效
    光拾取物镜，光学拾取器和光盘单元

    公开(公告)号：US07050379B2

    公开(公告)日：2006-05-23

    申请号：US10466636

    申请日：2002-02-28

    申请人： Toyokazu Takahashi ,  Satoshi Hineno

    发明人： Toyokazu Takahashi ,  Satoshi Hineno

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1392 ,  G02B9/04 ,  G02B27/0037 ,  G02B27/4238 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/22 ,  G11B2007/13727

    摘要： The present invention is relative to an objective lens (15) for an optical pickup, having a numerical aperture not less than 0.8, and adapted for correcting the chromatic aberration at an image point on an optical axis for light with a wavelength within several nm about a reference wavelength which is not larger than 420 nm. This objective lens is made up by a first lens set GR1, having a compound surface S2 of a refractive surface S2r and a diffractive surface S2d, and a second lens set GR2, having a positive refractive power, looking from the light source side. The compound surface of the first lens set is formed by adding the diffractive surface having the positive refractive power to the refractive surface which is an aspherical surface having the negative refractive power. The lens forming the second lens set is a single lens including at least one aspherical lens. This objective lens is small-sized, permits effective correction of chromatic aberration and enables the laser light to be converged to close to the diffraction threshold.

    摘要翻译： 本发明是相对于光学拾取器的物镜（15），具有不小于0.8的数值孔径，并且适于校正光轴上的像点上的色差，其波长在几nm左右 不大于420nm的参考波长。 该物镜由具有折射表面S 2r 2的复合表面S 2和衍射面S 2d 2的第一透镜组GR 1构成， / SUB>，具有正光焦度的第二透镜组GR 2，从光源侧看。 第一透镜组的复合表面通过将具有正折光力的衍射面添加到作为具有负屈光力的非球面的折射表面而形成。 形成第二透镜组的透镜是包括至少一个非球面透镜的单透镜。 该物镜是小尺寸的，允许有效校正色差，并使得激光能够收敛以接近衍射阈值。

    Objective lens unit for optical pickup, optical pickup and disc driving device
    6.
    发明授权
    Objective lens unit for optical pickup, optical pickup and disc driving device 失效
    用于光学拾取器，光学拾取器和盘驱动装置的物镜单元

    公开(公告)号：US06819491B2

    公开(公告)日：2004-11-16

    申请号：US10333402

    申请日：2003-01-21

    申请人： Toyokazu Takahashi ,  Satoshi Hineno

    发明人： Toyokazu Takahashi ,  Satoshi Hineno

    IPC分类号： G02B2744

    CPC分类号： G02B27/4238 ,  G02B5/1847 ,  G02B5/1895 ,  G02B27/0037 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/13727

    摘要： An objective lens unit for an optical pickup used for recording and/or reproducing information signals from an optical disc. The objective lens unit includes a resin layer (21) having, sequentially from an object side, a first surface S1 as an aspherical surface and a second surface S2 as an aspherical surface, at least one of the first surface and the second surface including a diffractive surface, and a lens of glass (22) having the second surface S2 as an aspherical surface and a third surface S3 as an aspherical surface. The lens unit is corrected for the chromatic aberration on an image surface on the optical axis with respect to the light of a reference wavelength not larger than 420 nm within several nm of the reference wavelength, with the numerical aperture of the lens unit being not less than 0.8. This objective lens unit is able to converge the laser light close to the limit of diffraction on the image surface.

    摘要翻译： 用于用于从光盘记录和/或再现信息信号的光学拾取器的物镜单元。 物镜单元包括从物体侧依次具有作为非球面的第一表面S1和作为非球面的第二表面S2的树脂层（21），第一表面和第二表面中的至少一个包括 衍射面和具有作为非球面的第二表面S2和作为非球面的第三表面S3的玻璃（22）的透镜。 相对于参考波长的几nm内的不大于420nm的参考波长的光，在光轴上的图像表面上的色差校正，透镜单元的数值孔径不小于 大于0.8。 该物镜单元能够将激光会聚到图像表面上的衍射极限。