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    OPTICAL INFORMATION DETECTING METHOD, OPTICAL HEAD, AND OPTICAL DISC APPARATUS
    42.
    发明申请
    OPTICAL INFORMATION DETECTING METHOD, OPTICAL HEAD, AND OPTICAL DISC APPARATUS 有权
    光学信息检测方法，光学头和光盘设备

    公开(公告)号：US20080067321A1

    公开(公告)日：2008-03-20

    申请号：US11852361

    申请日：2007-09-10

    申请人： HARUKAZU MIYAMOTO ,  Hideharu Mikami ,  Takeshi Shimano

    发明人： HARUKAZU MIYAMOTO ,  Hideharu Mikami ,  Takeshi Shimano

    IPC分类号： G02B27/40

    CPC分类号： G11B7/1356 ,  G11B7/005 ,  G11B7/13 ,  G11B2007/0013

    摘要： In multilayer optical discs and high-speed optical discs, the amount of reproduction light per unit time greatly decreases and the reproduction signal quality (S/N) significantly drops due to the low effective reflectivity and the short read time of the medium. These problems are solved by causing reflected signal light from the optical disc and reference light, which is separated from the same light source and introduced into a detector without being shone onto the optical disc, to interference with each other on the detector. Detector outputs having four different interference states are simultaneously obtained, the interference states being displaced at intervals of 90° in terms of the phase relationship between the reference light and the signal. Based on a operation of the four detector outputs, a reproduction signal can be obtained that is stable at all times and amplified with high quality, even when there is an optical path length variation due to disc undulations.

    摘要翻译： 在多层光盘和高速光盘中，由于介质的有效反射率低和读取时间短，每单位时间的再现光量大大降低，再现信号质量（S / N）显着下降。 这些问题通过使来自光盘的反射信号光和从相同光源分离并被引入检测器而不被照射到光盘上的参考光在检测器上彼此干涉来解决。 同时获得具有四种不同干扰状态的检测器输出，以参考光和信号之间的相位关系为90°的间隔移位干涉状态。 基于四个检测器输出的操作，即使当由于盘起伏而导致光程长度变化时，也可以始终获得稳定的高质量放大的再现信号。

    Optical disk apparatus using mechanism for controlling spherical aberration
    43.
    发明授权
    Optical disk apparatus using mechanism for controlling spherical aberration 失效
    使用用于控制球面像差的机构的光盘装置

    公开(公告)号：US07283439B2

    公开(公告)日：2007-10-16

    申请号：US11270613

    申请日：2005-11-10

    申请人： Takeshi Shimano ,  Takeshi Maeda ,  Hirofumi Sukeda

    发明人： Takeshi Shimano ,  Takeshi Maeda ,  Hirofumi Sukeda

    IPC分类号： G11B7/00 ,  G11B7/135

    CPC分类号： G11B7/13927 ,  G11B7/08576 ,  G11B7/09 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/1381 ,  G11B2007/13727

    摘要： In the past there has been a problem that on a detection surface the influence of interference causes a defocusing signal to degrade, narrowing the range in which spherical aberration can be stably detected. Accordingly, a diffraction grating is used to focus the inner and outer sides of luminous flux on separate optical detectors before the optical flux is focused on an optical detector and defocusing signals are independently calculated to find the difference therebetween, thereby providing a spherical aberration signal. This makes it possible to detect spherical aberration signals more stably.

    摘要翻译： 过去存在这样的问题：在检测面上，干扰的影响会导致散焦信号劣化，能够使可以稳定地检测球面像差的范围变窄。 因此，衍射光栅用于在光通量聚焦在光学检测器之前将光通量的内侧和外侧聚焦在单独的光学检测器上，并且独立地计算散焦信号以找到它们之间的差异，从而提供球面像差信号。 这使得可以更稳定地检测球面像差信号。

    Optical head, optical information storage apparatus, and their fabrication method
    44.
    发明申请
    Optical head, optical information storage apparatus, and their fabrication method 失效
    光头，光信息存储装置及其制造方法

    公开(公告)号：US20060193214A1

    公开(公告)日：2006-08-31

    申请号：US11211438

    申请日：2005-08-26

    申请人： Takeshi Shimano ,  Masatoshi Kanamaru ,  Masaya Horino

    发明人： Takeshi Shimano ,  Masatoshi Kanamaru ,  Masaya Horino

    IPC分类号： G11B7/00

    CPC分类号： G11B7/08576 ,  G11B7/123 ,  G11B7/1374

    摘要： In an optical head, if a lens is reduced in size so that it can be integrated with a light source and a photodetector, other optical components as well as the lens must be reduced in size, which would result in greater difficulties in handling for assembly and adjustment purposes. The invention allows large quantities of ultra-small optical heads to be produced accurately and at low cost, the optical heads being easy to adjust and not requiring the handling of minute components for adjustment purposes. A first substrate includes lenses for focusing light on an information storage medium, a second substrate includes detectors and disposed on the surface thereof, and a layer, which is disposed between the first and second substrates, includes prisms and mirrors. The layer also includes cavities in which light sources are disposed. The individual substrates are formed in the form of wafers with the lenses, mirrors, prisms, light sources, and photodetectors disposed thereon.

    摘要翻译： 在光学头中，如果透镜的尺寸减小以使其能够与光源和光电检测器集成，则其它光学部件以及透镜的尺寸必须减小，这将导致更大的装配难度 和调整目的。 本发明允许以低成本准确地，低成本地制造大量的超小型光学头，光学头易于调节，并且不需要处理用于调整目的的微小部件。 第一基板包括用于将光聚焦在信息存储介质上的透镜，第二基板包括检测器并设置在其表面上，并且布置在第一和第二基板之间的层包括棱镜和反射镜。 该层还包括其中设置有光源的空腔。 各个基板以晶片的形式形成，其上设置有透镜，反射镜，棱镜，光源和光电探测器。

    Optical information recording apparatus
    45.
    发明申请
    Optical information recording apparatus 有权
    光信息记录装置

    公开(公告)号：US20050063259A1

    公开(公告)日：2005-03-24

    申请号：US10879080

    申请日：2004-06-30

    申请人： Fumio Isshiki ,  Kunikazu Ohnishi ,  Nobuyuki Maeda ,  Takahiro Kurokawa ,  Takeshi Shimano

    发明人： Fumio Isshiki ,  Kunikazu Ohnishi ,  Nobuyuki Maeda ,  Takahiro Kurokawa ,  Takeshi Shimano

    IPC分类号： G11B7/085 ,  G11B7/00 ,  G11B7/0033 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135

    CPC分类号： G11B7/13925 ,  G11B7/0033 ,  G11B7/0917 ,  G11B7/0945 ,  G11B2007/0013

    摘要： A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and the residual aberration in the optical system. The spherical aberration and defocus are coarsely adjusted using the amplitude (PP amplitude) of the tracking error signal and then finely adjusted using the amplitude (RF amplitude) of the readout signal. Since the spherical aberration can properly be adjusted, it is possible to raise the reliability of the readout signal.

    摘要翻译： 不管读出信号检测器的位置误差和光学系统中的残余像差如何，允许可重写光盘装置，光学信息记录和再现装置等将光学系统自动且适当地调整到最佳焦点状态。 使用跟踪误差信号的振幅（PP振幅）粗略调整球面像差和散焦，然后使用读出信号的振幅（RF幅度）进行微调。 由于可以适当地调节球面像差，所以可以提高读出信号的可靠性。

    Optical head and optical disk apparatus
    46.
    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

    申请人： Tetsuo Ariyoshi ,  Mariko Umeda ,  Takeshi Shimano

    发明人： Tetsuo Ariyoshi ,  Mariko Umeda ,  Takeshi Shimano

    IPC分类号： G11B700

    CPC分类号： G11B7/1353 ,  G11B7/0943 ,  G11B7/0948 ,  G11B7/0956 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

    摘要： 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.

    摘要翻译： 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 disk device having optical phase compensator
    48.
    发明授权
    Optical disk device having optical phase compensator 失效
    具有光学相位补偿器的光盘装置

    公开(公告)号：US5784347A

    公开(公告)日：1998-07-21

    申请号：US597406

    申请日：1996-02-08

    申请人： Harukazu Miyamoto ,  Takeshi Shimano ,  Hisataka Sugiyama ,  Mariko Umeda

    发明人： Harukazu Miyamoto ,  Takeshi Shimano ,  Hisataka Sugiyama ,  Mariko Umeda

    IPC分类号： G11B11/105 ,  G11B7/00

    CPC分类号： G11B11/10595 ,  G11B11/10515 ,  G11B11/10543 ,  G11B11/10584

    摘要： An optical disk device having a light source for emitting light, focusing optics for radiating and focusing the light onto an optical recording medium, a photo-detection system for photoelectrically transforming reflected light from the optical recording medium, a reproduction circuit for reproducing information recorded on the optical recording medium by using an electric signal from the photo-detection system, phase control optics for changing the phase of the reflected light, a readout control circuit for controlling the quantity of the phase change of the phase control optics, and a learning control circuit for calculating the optimum value of the phase change quantity by monitoring the output signal of the reproduction circuit while changing the quantity of the phase change by the readout control circuit. Thus, information can be reproduced from a recording medium having high recording density without crosstalk.

    摘要翻译： 一种具有用于发光的光源的光盘装置，用于将光发射并聚焦到光记录介质上的聚焦光学装置，用于对来自光记录介质的反射光进行光电转换的光检测系统，用于再现记录在 通过使用来自光检测系统的电信号的光记录介质，用于改变反射光的相位的相位控制光学器件，用于控制相位控制光学器件的相位变化量的读出控制电路和学习控制 电路，用于通过在通过读出控制电路改变相变量的同时监视再现电路的输出信号来计算相位变化量的最佳值。 因此，可以从没有串扰的高记录密度的记录介质再现信息。