Chromatic aberration-correcting element and optical pickup device using the same
    12.
    发明授权
    Chromatic aberration-correcting element and optical pickup device using the same 失效
    色差校正元件和使用其的光学拾取器件

    公开(公告)号:US07616549B2

    公开(公告)日:2009-11-10

    申请号:US11267396

    申请日:2005-11-04

    CPC classification number: G11B7/13922 G11B2007/0006

    Abstract: The present invention is related to a chromatic aberration-correcting element which allows the adoption of BDs even when DVD/CD light beams are incident. The chromatic aberration-correcting element has a diffractive structure formed thereon, which can correct chromatic aberration in BD wavelength light beams in addition to adopting DVD/CD wavelength light beams. Also provided is an optical pickup device whose structure is simplified by employing the chromatic aberration-correcting element.

    Abstract translation: 本发明涉及即使当DVD / CD光束入射时也允许采用BD的色像差校正元件。 色像差校正元件具有形成在其上的衍射结构,除了采用DVD / CD波长光束之外,其可以校正BD波长光束中的色差。 还提供了一种通过采用色差校正元件来简化其结构的光学拾取装置。

    Optical head and optical disk apparatus
    13.
    发明授权
    Optical head and optical disk apparatus 失效
    光头和光盘装置

    公开(公告)号:US06807133B2

    公开(公告)日:2004-10-19

    申请号:US09921142

    申请日:2001-08-03

    Abstract: To stably carry out recording and reproducing to and from a high density optical disk without using a double servo in the optical disk using a high NA objective lens. A detection of a spherical aberration and a detection of a coma aberration in a radial direction are simultaneously performed, and the coma aberration generated with the offset of an objective lens 109 is corrected in real time, thus enlarging an allowable offset amount of the objective lens. In order to simultaneously detect the spherical aberration and the coma aberration, focal shift and tracking shift signals in an inside region and outside region of reflected light flux are detected respectively, and the differential signals are set as spherical aberration and coma aberration signals.

    Abstract translation: 为了在不使用高NA物镜的光盘中不使用双重伺服的情况下稳定地向高密度光盘执行记录和再现。 同时执行球面像差的检测和径向的彗形像差的检测,并且实时地修正由物镜109的偏移产生的彗形像差,从而扩大物镜的容许偏移量 。 为了同时检测球面像差和彗形像差,分别检测反射光束的内部区域和外部区域中的焦点偏移和跟踪偏移信号,并将差分信号设置为球面像差和彗形像差信号。

    Light diffusion lenses and lighting fixtures having the same
    15.
    发明授权
    Light diffusion lenses and lighting fixtures having the same 有权
    光扩散透镜和具有相同的灯具

    公开(公告)号:US08641231B2

    公开(公告)日:2014-02-04

    申请号:US13222694

    申请日:2011-08-31

    Abstract: A lighting fixture includes: a base; a plurality of optical sources attached on an upper surface of the base to emit light; a heat spreader attached to the base to radiate heat emitted from the plurality of optical sources; and a light diffusion lens disposed on the upper surface of the plurality of optical sources to refract light emitted from the plurality of optical sources and to increase an irradiation angle of light. In the lighting fixture, an irradiation angle of light emitted from an optical source is close to that of a general electric-light bulb and thus a light distribution characteristic of the lighting fixture may be improved.

    Abstract translation: 照明灯具包括:底座; 多个光源,其安装在所述基座的上表面上以发光; 附接到所述基座的散热器,以辐射从所述多个光源发射的热; 以及光散射透镜,其设置在所述多个光源的上表面上以折射从所述多个光源发射的光并增加光的照射角度。 在照明器具中,从光源发射的光的照射角度接近于普通电灯泡的照射角度,因此可以提高照明器具的配光特性。

    Information reproducing method and information reproducing apparatus of multilayer optical disk
    16.
    发明授权
    Information reproducing method and information reproducing apparatus of multilayer optical disk 有权
    多层光盘的信息再现方法和信息再现装置

    公开(公告)号:US07123565B2

    公开(公告)日:2006-10-17

    申请号:US10368415

    申请日:2003-02-20

    Abstract: When reproducing a multilayer optical disk using a high-numerical-aperture objective, the period of time required before the disk is reproduced is reduced by discriminating recording layers. A spherical aberration signal is detected as a differential signal between focus position fluctuation signals respectively in a central section and in a peripheral section of a reproduced flux of light. A recording layer is discriminated using a quantity of correction of spherical aberration at a zero-crossing point of a level or a spherical aberration signal associated with the differential signal. After adding the spherical aberration for the correction of the discriminated layer, residual spherical aberration is corrected by feedback control using a residual spherical aberration signal.

    Abstract translation: 当使用高数值孔径物镜再现多层光盘时,通过识别记录层来减少盘再生之前所需的时间。 球面像差信号被分别作为中心部分的焦点位置波动信号与再生光束的周边部分之间的差分信号进行检测。 使用在与差分信号相关联的电平或球面像差信号的过零点处的球面像差校正量来区分记录层。 在添加用于鉴别层的校正的球面像差之后,通过使用残余球面像差信号的反馈控制来校正残留球差。

    Optical head and optical disk apparatus
    19.
    发明申请
    Optical head and optical disk apparatus 失效
    光头和光盘装置

    公开(公告)号:US20050025000A1

    公开(公告)日:2005-02-03

    申请号:US10934384

    申请日:2004-09-07

    Abstract: To stably carry out recording and reproducing to and from a high density optical disk without using a double servo in the optical disk using a high NA objective lens. A detection of a spherical aberration and a detection of a coma aberration in a radial direction are simultaneously performed, and the coma aberration generated with the offset of an objective lens 109 is corrected in real time, thus enlarging an allowable offset amount of the objective lens. In order to simultaneously detect the spherical aberration and the coma aberration, focal shift and tracking shift signals in an inside region and outside region of reflected light flux are detected respectively, and the differential signals are set as spherical aberration and coma aberration signals.

    Abstract translation: 为了在不使用高NA物镜的光盘中不使用双重伺服的情况下稳定地向高密度光盘执行记录和再现。 同时执行球面像差的检测和径向的彗形像差的检测,并且实时地修正由物镜109的偏移产生的彗形像差,从而扩大物镜的容许偏移量 。 为了同时检测球面像差和彗形像差,分别检测反射光束的内部区域和外部区域中的焦点偏移和跟踪偏移信号,并将差分信号设置为球面像差和彗形像差信号。

    Optical information recording/reproducing apparatus, and optical head apparatus

    公开(公告)号:US06563099B2

    公开(公告)日:2003-05-13

    申请号:US09925311

    申请日:2001-08-10

    CPC classification number: G11B7/131 G11B7/0916 G11B7/1381 G11B2007/0013

    Abstract: To reduce an effect of reflected light from a layer (or layers) other than a layer to be read upon focus position control when reading a multilayer optical disk in an optical disk drive. In an optical system where a focus error signal is generated by the knife edge method, a photodetector 53 that is divided into four parts is used. Each of two pairs of light detecting elements on the right or left side are formed by division of a detection plane of the photodetector such that the reflected light from a neighboring layer falls half-and-half on that pair of the light detecting elements. Signals from the photodetector are given with alternating polarities in such a way that any adjacent light detecting elements have mutually different polarities and are added up together to form the focus error signal.

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