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73 条记录 (耗时 0.079 秒)

    Layer discriminating focus control apparatus, optical disk apparatus, and methods therefore
    52.
    发明授权
    Layer discriminating focus control apparatus, optical disk apparatus, and methods therefore 有权
    因此，层鉴别对焦控制装置，光盘装置和方法

    公开(公告)号：US07274630B2

    公开(公告)日：2007-09-25

    申请号：US10391603

    申请日：2003-03-20

    申请人： Sumitaka Maruyama ,  Masahiko Tanaka ,  Hideaki Ohsawa ,  Maho Kuwahara ,  Akihito Ogawa ,  Kazuto Kuroda

    发明人： Sumitaka Maruyama ,  Masahiko Tanaka ,  Hideaki Ohsawa ,  Maho Kuwahara ,  Akihito Ogawa ,  Kazuto Kuroda

    IPC分类号： G11B7/095

    CPC分类号： G11B7/08511

    摘要： This invention relates to a focus control apparatus having a controller which generates a control signal and performs focus operation when the peak timing of a focus sum signal based on reflected light and the zero-crossing timing of a focus error signal are detected to substantially coincide with each other in supplying a control signal to a lens actuator driver for supplying a driving signal to a lens actuator for driving a lens. The invention also relates to an optical disk apparatus using the focus control apparatus. By detecting coincidence of the two timings, two reflected waves are discriminated, and stable focus operation is achieved.

    摘要翻译： 本发明涉及一种具有控制器的聚焦控制装置，当控制器产生控制信号并且当基于反射光的聚焦和信号的峰值定时和聚焦误差信号的过零定时被检测到基本上与 彼此提供控制信号到镜头致动器驱动器，用于向驱动透镜的透镜致动器提供驱动信号。 本发明还涉及使用聚焦控制装置的光盘装置。 通过检测两个定时的一致性，鉴别出两个反射波，并且实现了稳定的聚焦操作。

    Optical disc and optical disc apparatus
    57.
    发明申请
    Optical disc and optical disc apparatus 失效

    公开(公告)号：US20070019532A1

    公开(公告)日：2007-01-25

    申请号：US11528579

    申请日：2006-09-28

    申请人： Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

    发明人： Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

    IPC分类号： G11B7/24

    CPC分类号： G11B7/24056

    摘要： The refractive index of a light transmission layer of an optical disk is set within the range of 1.45 to 1.75, the numerical aperture of a lens emitting laser light which is incident onto the light transmission layer is set to 0.65, and the wavelength range of the laser light is set within the range of 395 to 415 nm. Further, in order that aberrations fall within the range of certain acceptable values, the thickness t of the light transmission layer is set within the range of f(n)−t1≦t≦f(n)+t2, employing constants t1, t2 determined based on an acceptable value of aberration and function f(n) of the refractive index n.

    Optical pickup device and optical disk device
    59.
    发明申请
    Optical pickup device and optical disk device 审中-公开
    光拾取装置和光盘装置

    公开(公告)号：US20060023610A1

    公开(公告)日：2006-02-02

    申请号：US11192404

    申请日：2005-07-29

    申请人： Sumitaka Maruyama ,  Yuuichi Nakamura

    发明人： Sumitaka Maruyama ,  Yuuichi Nakamura

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1353 ,  G11B7/1275 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/13922 ,  G11B2007/0006

    摘要： An optical pickup device has first emission unit emits first laser beam, second emission unit emits second laser beam whose wavelength is different from that of first laser beam, to same optical axis to first laser beam is emitted, objective lens collects first and second laser beams emitted from first and second emission units and emits collected light to information recording medium, wavefront converting unit arranged on routes of respective reflected lights of first and second laser beams from information recording medium, wavefront converting unit receiving reflected lights of first and second laser beams and selectively wavefront converting at least one of reflected lights, and light receiving unit receives at least one of reflected lights of first and second laser beams having passed through wavefront converting unit, and outputs detection signal corresponding thereto.

    摘要翻译： 光拾取装置具有第一发射单元发射第一激光束，第二发射单元发射波长不同于第一激光束的第二激光束，发射到与第一激光束相同的光轴，物镜收集第一和第二激光束 从第一发射单元和第二发射单元发射并将信息记录介质发射的收集的光发射到信息记录介质的第一和第二激光束的反射光的路线上的波前转换单元，接收第一和第二激光束的反射光的波前转换单元， 选择性地波前转换反射光中的至少一个，并且光接收单元接收通过波前转换单元的第一和第二激光束的反射光中的至少一个，并输出与之对应的检测信号。

    Optical disc apparatus
    60.
    发明申请
    Optical disc apparatus 审中-公开
    光盘装置

    公开(公告)号：US20060002276A1

    公开(公告)日：2006-01-05

    申请号：US11168432

    申请日：2005-06-29

    申请人： Sumitaka Maruyama ,  Akihito Ogawa ,  Katsuo Iwata ,  Kazuo Watabe

    发明人： Sumitaka Maruyama ,  Akihito Ogawa ,  Katsuo Iwata ,  Kazuo Watabe

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1353 ,  G11B7/08 ,  G11B7/0935 ,  G11B7/1372 ,  G11B7/1381 ,  G11B2007/0013

    摘要： An optical disc apparatus of the invention in its broader aspects, by locating, at a position displaced a predetermined distance from the focal point of a condenser lens, a light-receiving surface of a photodetector for receiving a laser beam reflected from first and second recording layers of an optical disc, is configured, when playing back a signal from a certain recording layer, to decrease the difference in a crosstalk caused by a light reflected from other recording layers.

    摘要翻译： 本发明的光盘装置在其更广泛的方面，通过在从聚光透镜的焦点偏离预定距离的位置处定位用于接收从第一和第二记录反射的激光束的光电检测器的光接收表面 当从某个记录层播放信号时，配置有光盘的层，以减少由其他记录层反射的光引起的串扰差异。