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    Optical head device, and recording and/or reproducing device
    3.
    发明授权
    Optical head device, and recording and/or reproducing device 有权
    光头装置，以及记录和/或再现装置

    公开(公告)号：US08045426B2

    公开(公告)日：2011-10-25

    申请号：US12602718

    申请日：2008-05-29

    申请人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

    发明人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

    IPC分类号： G11B7/00

    CPC分类号： G11B7/13925 ,  G11B7/1376 ,  G11B2007/0006 ,  G11B2007/0013

    摘要： An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens 4 corrects a third-order spherical aberration which is generated depending on the thickness of a light transmissive layer from a surface of a first optical information recording medium 30, corresponding to an optimal substrate thickness of a first objective lens 6, to an intended information recording surface, assuming that the light transmissive layer thickness of the first optical information recording medium 30 which minimizes a residual third-order spherical aberration at the time of incidence of parallel light into the first objective lens 6 is defined as the optimal substrate thickness of the first objective lens 6. The optimal substrate thickness of the first objective lens 6 is defined in such a manner that a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 farthest from the first objective lens 6 at the time of correcting the third-order spherical aberration, and a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 closest to the first objective lens 6 at the time of correcting the third-order spherical aberration are set equal to each other.

    摘要翻译： 本发明的目的是抑制在校正三次球面像差时产生的波前像差的影响，并且实现满意的信息记录和/或再现。 准直透镜4将与第一光学信息记录介质30的表面相对应的透光层的厚度相应于第一物镜6的最佳基板厚度的三次球面像差校正为 假设将平行光入射到第一物镜6中的残余三阶球面像差最小化的第一光学信息记录介质30的透光层厚度定义为最佳基板厚度 第一物镜6的最佳基板厚度被定义为使得在第一光信息记录介质30的信息记录表面上产生的波前像差的变化最远离第一物镜6的第一物镜6。 在校正三次球面像差时的物镜6，以及a 在校正三次球面像差时在最靠近第一物镜6的第一光学信息记录介质30的信息记录表面上产生的波前像差的变化被设置为彼此相等。

    OPTICAL PICKUP DEVICE, OPTICAL DISC DEVICE, COMPUTER, OPTICAL DISC PLAYER, AND OPTICAL DISC RECORDER
    4.
    发明申请
    OPTICAL PICKUP DEVICE, OPTICAL DISC DEVICE, COMPUTER, OPTICAL DISC PLAYER, AND OPTICAL DISC RECORDER 审中-公开
    光学拾取装置，光盘装置，计算机，光盘播放器和光盘记录器

    公开(公告)号：US20100214891A1

    公开(公告)日：2010-08-26

    申请号：US12681457

    申请日：2008-10-02

    申请人： Joji Anzai ,  Kousei Sano ,  Eishin Mori ,  Hideki Aikoh ,  Hirotaka Ueno

    发明人： Joji Anzai ,  Kousei Sano ,  Eishin Mori ,  Hideki Aikoh ,  Hirotaka Ueno

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

    CPC分类号： G11B7/131 ,  G11B7/1275 ,  G11B2007/0006

    摘要： A first light source 1a emits a first light flux with a first wavelength. A second light source 1b emits a second light flux with a second wavelength that is different from the first wavelength and a third light flux with a third wavelength that is different from the first wavelength and the second wavelength. A collimator lens 6, a first objective lens 9, and a second objective lens 10 collect the first to third light fluxes as converged light on an optical disc. A first composite photodetector 13 detects the reflected light fluxes from the optical disc. The first composite photodetector 13 includes a first quartered light-receiving unit 13a that receives a light flux obtained by reflection of at least one light flux from among the first to third light fluxes from the optical disc and a second quartered light-receiving unit 13b that receives a light flux obtained by reflection of the remaining light fluxes from the optical disc. Such configuration ensures compatibility with optical discs of at least three kinds and enables miniaturization.

    摘要翻译： 第一光源1a发射具有第一波长的第一光通量。 第二光源1b发射具有不同于第一波长的第二波长的第二光束和具有不同于第一波长和第二波长的第三波长的第三光束。 准直透镜6，第一物镜9和第二物镜10将第一至第三光束作为会聚光收集在光盘上。 第一复合光电检测器13检测来自光盘的反射光束。 第一复合光电检测器13包括第一四分之一的光接收单元13a，其接收从来自光盘的第一至第三光束中的至少一个光通量的反射获得的光束和第二四分之一的光接收单元13b， 接收通过从光盘反射剩余光束而获得的光通量。 这样的配置确保与至少三种的光盘的兼容性，并且能够实现小型化。

    Optical head
    5.
    发明授权
    Optical head 有权
    光头

    公开(公告)号：US08068403B2

    公开(公告)日：2011-11-29

    申请号：US12090144

    申请日：2006-10-13

    申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

    发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

    IPC分类号： G11B7/00

    CPC分类号： G11B7/133 ,  G11B7/0908 ,  G11B7/1381 ,  G11B2007/0013

    摘要： To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc.The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference. The calculator calculates the difference between sum of a first group of signals supplied from a first group of areas and that of a second group of signals supplied from a second group of areas, thereby generating a focus error signal.

    摘要翻译： 通过减少由多层光盘的非读取层反射的光的干扰的影响来提供光学头来产生良好的伺服和读取信号。 头部包括：第一光学系统，用于将来自光源的光聚焦在第一或第二存储层上; 第二光学系统，用于当所述光会聚在所述第一层上时，接收和发射从所述第一层反射的光和从所述第二层反射的杂散光; 光检测器; 和一个计算器。 光电检测器的光敏区域输出表示通过第二系统入射到那里的光的强度的信号。 入射在第二系统上的反射和杂散光彼此干涉，并且第一和第二组区域被布置成等同地受到由干涉引起的强度变化的影响。 计算器计算从第一组区域提供的第一组信号和从第二组区域提供的第二组信号的第一组信号的和之间的差，从而产生聚焦误差信号。

    OPTICAL HEAD
    6.
    发明申请
    OPTICAL HEAD 有权
    光学头

    公开(公告)号：US20090257340A1

    公开(公告)日：2009-10-15

    申请号：US12090144

    申请日：2006-10-13

    申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

    发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

    IPC分类号： G11B7/00

    CPC分类号： G11B7/133 ,  G11B7/0908 ,  G11B7/1381 ,  G11B2007/0013

    摘要： To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc.The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference. The calculator calculates the difference between sum of a first group of signals supplied from a first group of areas and that of a second group of signals supplied from a second group of areas, thereby generating a focus error signal.

    摘要翻译： 通过减少由多层光盘的非读取层反射的光的干扰的影响来提供光学头来产生良好的伺服和读取信号。 头部包括：第一光学系统，用于将来自光源的光聚焦在第一或第二存储层上; 第二光学系统，用于当所述光会聚在所述第一层上时，接收和发射从所述第一层反射的光和从所述第二层反射的杂散光; 光检测器; 和一个计算器。 光电检测器的光敏区域输出表示通过第二系统入射到那里的光的强度的信号。 入射在第二系统上的反射和杂散光彼此干涉，并且第一和第二组区域被布置成等同地受到由干涉引起的强度变化的影响。 计算器计算从第一组区域提供的第一组信号和从第二组区域提供的第二组信号的第一组信号的和之间的差，从而产生聚焦误差信号。

    OPTICAL HEAD DEVICE, AND RECORDING AND/OR REPRODUCING DEVICE
    7.
    发明申请
    OPTICAL HEAD DEVICE, AND RECORDING AND/OR REPRODUCING DEVICE 有权
    光头设备，以及记录和/或再现设备

    公开(公告)号：US20100254236A1

    公开(公告)日：2010-10-07

    申请号：US12602718

    申请日：2008-05-29

    申请人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

    发明人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

    IPC分类号： G11B20/10 ,  G11B7/135

    CPC分类号： G11B7/13925 ,  G11B7/1376 ,  G11B2007/0006 ,  G11B2007/0013

    摘要： An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens 4 corrects a third-order spherical aberration which is generated depending on the thickness of a light transmissive layer from a surface of a first optical information recording medium 30, corresponding to an optimal substrate thickness of a first objective lens 6, to an intended information recording surface, assuming that the light transmissive layer thickness of the first optical information recording medium 30 which minimizes a residual third-order spherical aberration at the time of incidence of parallel light into the first objective lens 6 is defined as the optimal substrate thickness of the first objective lens 6. The optimal substrate thickness of the first objective lens 6 is defined in such a manner that a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 farthest from the first objective lens 6 at the time of correcting the third-order spherical aberration, and a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 closest to the first objective lens 6 at the time of correcting the third-order spherical aberration are set equal to each other.

    摘要翻译： 本发明的目的是抑制在校正三次球面像差时产生的波前像差的影响，并且实现满意的信息记录和/或再现。 准直透镜4将与第一光学信息记录介质30的表面相对应的透光层的厚度相应于第一物镜6的最佳基板厚度的三次球面像差校正为 假设将平行光入射到第一物镜6中的残余三阶球面像差最小化的第一光学信息记录介质30的透光层厚度定义为最佳基板厚度 第一物镜6的最佳基板厚度被定义为使得在第一光信息记录介质30的信息记录表面上产生的波前像差的变化最远离第一物镜6的第一物镜6。 在校正三次球面像差时的物镜6，以及a 在校正三次球面像差时在最靠近第一物镜6的第一光学信息记录介质30的信息记录表面上产生的波前像差的变化被设置为彼此相等。

    Optical recording medium, information recording or reproducing method, and information recording or reproducing apparatus
    8.
    发明申请
    Optical recording medium, information recording or reproducing method, and information recording or reproducing apparatus 审中-公开
    光记录介质，信息记录或再现方法以及信息记录或再现装置

    公开(公告)号：US20080109837A1

    公开(公告)日：2008-05-08

    申请号：US11907186

    申请日：2007-10-10

    申请人： Joji Anzai ,  Hideki Aikoh ,  Kousei Sano ,  Eishin Mori

    发明人： Joji Anzai ,  Hideki Aikoh ,  Kousei Sano ,  Eishin Mori

    IPC分类号： G11B7/24

    CPC分类号： G11B7/13927 ,  G11B7/0948 ,  G11B7/24038

    摘要： An optical recording medium improves the quality of servo signals and readout signals by preventing light convergence on the back of the surface of the optical recording medium and reducing interference of light reflected from recording surfaces of the optical recording medium. An optical recording medium 40 includes at least three information recording surfaces, and satisfies d1

    摘要翻译： 光学记录介质通过防止光记录介质表面背面的光会聚并减少由光记录介质的记录表面反射的光的干扰来提高伺服信号和读出信号的质量。 光记录介质40包括至少三个信息记录表面，并且满足d 1 <（d 4 -d 1），其中d 1是从光记录介质40的表面40z到第一信息记录表面40的距离 最接近表面40z和d4的距离是从表面40z到距离表面40z最远的第四信息记录表面40d的距离，并且满足dmin> =8μm，其中dmin为 所述至少三个信息记录表面之间的最小层间厚度。

    Optical head device, aberration correction method and optical information processing apparatus
    9.
    发明授权
    Optical head device, aberration correction method and optical information processing apparatus 有权
    光头装置，像差校正方法和光信息处理装置

    公开(公告)号：US07848208B2

    公开(公告)日：2010-12-07

    申请号：US11905927

    申请日：2007-10-05

    申请人： Eishin Mori ,  Hideki Aikoh ,  Joji Anzai ,  Kousei Sano

    发明人： Eishin Mori ,  Hideki Aikoh ,  Joji Anzai ,  Kousei Sano

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1353 ,  G02B27/0037 ,  G02B27/4238 ,  G11B7/1376 ,  G11B7/13925 ,  G11B2007/0013

    摘要： An optical head device is provided with a semiconductor laser, an aberration correcting element for transmitting a beam from the semiconductor laser, a light guiding portion for introducing the beam from the semiconductor laser to the aberration correcting element, and an objective lens for focusing the beam having passed through the aberration correcting element on an optical disc. The aberration correcting element corrects a longitudinal chromatic aberration occurring in the objective lens and a longitudinal chromatic aberration occurring in the light guiding portion excluding the objective lens and the aberration correcting element based on a longitudinal chromatic aberration occurring in the aberration correcting element when the semiconductor laser emits a beam having a wavelength different by a specified wavelength difference.Therefore, an optical head device, an aberration correction method and an optical information processing apparatus can be provided which can suppress a longitudinal chromatic aberration occurring in the entire optical system from a light source to an objective lens.

    摘要翻译： 光学头装置设置有半导体激光器，用于透射来自半导体激光器的光束的像差校正元件，用于将来自半导体激光器的光束引入到像差校正元件的导光部分，以及用于聚焦光束的物镜 已经通过光盘上的像差校正元件。 像差校正元件根据在半导体激光器中产生的像差校正元件中发生的纵向色差校正在物镜中发生的纵向色差和除了物镜和像差校正元件之外的导光部分中产生的纵​​向色差 发射波长不同于特定波长差的波束。 因此，可以提供可以抑制从光源到物镜的整个光学系统中发生的纵向色差的光学头装置，像差校正方法和光学信息处理装置。

    Optical head device, aberration correction method and optical information processing apparatus
    10.
    发明申请
    Optical head device, aberration correction method and optical information processing apparatus 有权
    光头装置，像差校正方法和光信息处理装置

    公开(公告)号：US20080084809A1

    公开(公告)日：2008-04-10

    申请号：US11905927

    申请日：2007-10-05

    申请人： Eishin Mori ,  Hideki Aikoh ,  Joji Anzai ,  Kousei Sano

    发明人： Eishin Mori ,  Hideki Aikoh ,  Joji Anzai ,  Kousei Sano

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1353 ,  G02B27/0037 ,  G02B27/4238 ,  G11B7/1376 ,  G11B7/13925 ,  G11B2007/0013

    摘要： An optical head device is provided with a semiconductor laser, an aberration correcting element for transmitting a beam from the semiconductor laser, a light guiding portion for introducing the beam from the semiconductor laser to the aberration correcting element, and an objective lens for focusing the beam having passed through the aberration correcting element on an optical disc. The aberration correcting element corrects a longitudinal chromatic aberration occurring in the objective lens and a longitudinal chromatic aberration occurring in the light guiding portion excluding the objective lens and the aberration correcting element based on a longitudinal chromatic aberration occurring in the aberration correcting element when the semiconductor laser emits a beam having a wavelength different by a specified wavelength difference.Therefore, an optical head device, an aberration correction method and an optical information processing apparatus can be provided which can suppress a longitudinal chromatic aberration occurring in the entire optical system from a light source to an objective lens.

    摘要翻译： 光学头装置设置有半导体激光器，用于透射来自半导体激光器的光束的像差校正元件，用于将来自半导体激光器的光束引入到像差校正元件的导光部分，以及用于聚焦光束的物镜 已经通过光盘上的像差校正元件。 像差校正元件根据在半导体激光器中产生的像差校正元件中发生的纵向色差校正在物镜中发生的纵向色差和除了物镜和像差校正元件之外的导光部分中产生的纵​​向色差 发射波长不同于特定波长差的波束。 因此，可以提供可以抑制从光源到物镜的整个光学系统中发生的纵向色差的光学头装置，像差校正方法和光学信息处理装置。