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321 条记录 (耗时 0.037 秒)

    Optical Disc Apparatus
    81.
    发明申请
    Optical Disc Apparatus 有权
    光盘装置

    公开(公告)号：US20100188961A1

    公开(公告)日：2010-07-29

    申请号：US12754211

    申请日：2010-04-05

    申请人： Takeshi Shimano ,  Harukazu Miyamoto

    发明人： Takeshi Shimano ,  Harukazu Miyamoto

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1362 ,  G11B7/1356 ,  G11B7/1365

    摘要： An optical disc apparatus includes a laser diode, a first optical component which branches beams from the laser diode into a first beam and a second beam, an objective lens which focuses the first beam on an optical information recording medium, an actuator which drives the objective lens in an optical axis direction, a reference mirror provided in an optical path of the second beam, an optical path length varying unit which varies an optical path length of the second beam, a first photo detector, a second photo detector, a second optical component which branches beams obtained by combining the first beam which is reflected by the optical information recording medium and the second beam which is reflected by the reference mirror and which makes the branched beams incident on the first and second photo detectors, and a signal processing part.

    摘要翻译： 一种光盘装置，包括激光二极管，将激光二极管分束成第一光束的第一光学部件和第二光束，将第一光束聚焦在光学信息记录介质上的物镜，驱动该物镜的致动器 透镜在光轴方向上，设置在第二光束的光路中的参考镜，改变第二光束的光路长度的光程长度变化部，第一光检测器，第二光检测器，第二光检测器 通过组合由光信息记录介质反射的第一光束和被参考反射镜反射并使分支光束入射在第一和第二光电检测器上的第二光束而获得的光束的分量，以及信号处理部分 。

    Optical information detecting method, optical head, and optical disc apparatus utilizing plural photodetectors
    82.
    发明授权
    Optical information detecting method, optical head, and optical disc apparatus utilizing plural photodetectors 有权
    光信息检测方法，光头，利用多个光检测器的光盘装置

    公开(公告)号：US07750276B2

    公开(公告)日：2010-07-06

    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
    88.
    发明申请
    Optical disk 有权

    公开(公告)号：US20080316876A1

    公开(公告)日：2008-12-25

    申请号：US12213761

    申请日：2008-06-24

    申请人： Harukazu Miyamoto ,  Takahiro Kurokawa

    发明人： Harukazu Miyamoto ,  Takahiro Kurokawa

    IPC分类号： G11B7/00

    CPC分类号： G11B20/0021 ,  G11B7/005 ,  G11B7/007 ,  G11B7/24082 ,  G11B20/00086 ,  G11B20/1403 ,  G11B27/19 ,  G11B27/24 ,  G11B2220/20

    摘要： The invention provides an optical disk that enables high-speed reproduction of address signals. A wobble address system for optical disk supports various types of synchronization, such as phase synchronization, bit synchronization, word synchronization, etc., to be established easily with high detection reliability with the use of an self-orthogonal code. Thus, the invention provides a method for easily synchronizing an address signal, i.e., high-speed reproduction of the address signal. Further, by virtue of an efficient modulation system of the address signal and redundancy thereof, it becomes possible to detect address information with high reliability. This capability is particularly effective in optical recording/reproduction with a blue light source whose signal light quantity and reproduction quality are prone to reduce. Moreover, other additional data of the address data is preserved in the wobbles, which provides medium information to a rewritable optical disk without using embossed pits such that a high-reliability disk (with enhanced security) is realized with a low cost and easily.

    Information recording medium having pair of electrodes
    90.
    发明授权
    Information recording medium having pair of electrodes 有权
    具有一对电极的信息记录介质

    公开(公告)号：US07426174B2

    公开(公告)日：2008-09-16

    申请号：US10988548

    申请日：2004-11-16

    申请人： Motoyasu Terao ,  Harukazu Miyamoto ,  Toshimichi Shintani ,  Kyoko Kojima ,  Yuko Tsuchiya

    发明人： Motoyasu Terao ,  Harukazu Miyamoto ,  Toshimichi Shintani ,  Kyoko Kojima ,  Yuko Tsuchiya

    IPC分类号： G11B5/84

    CPC分类号： G11B13/045 ,  G11B7/00454 ,  G11B7/00455 ,  G11B7/006 ,  G11B7/24033 ,  G11B7/2578 ,  G11B7/258 ,  G11B11/002 ,  G11B2007/0013 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316

    摘要： Disclosed herewith is a method for enabling fast and high density recording of information. A voltage is applied to a recording layer formed between a pair of electrodes. The distance between the pair of electrodes is set wider at one of land and groove areas of a subject optical disk and narrower at the other or the distance is set so that light absorption occurs only in either of the land and groove areas. The optical disk is also provided with a layer of which light absorption spectrum changes according to the application of an electric current, thereby absorbing the light. The new layer may be the recording layer itself or a layer adjacent to the recording layer. Because a heat generates only from a small area of the optical disk at the time of recording, the disk can be turned rapidly and permissively to the auto focusing and tracking offsets, thereby enabling fast and high density recording. The disk can thus be formed with easily selectable multiple layers.

    摘要翻译： 这里公开了一种用于实现信息的快速和高密度记录的方法。 对形成在一对电极之间的记录层施加电压。 一对电极之间的距离在本体光盘的脊和凹槽区域中的一个处被设定得更宽，而在另一个电极处的距离更窄，或者设置距离，使得光吸收仅在凹槽区域和凹槽区域中的任一个中发生。 光盘还设置有根据电流的应用使光吸收光谱发生变化的层，从而吸收光。 新层可以是记录层本身或与记录层相邻的层。 由于在记录时仅从光盘的小区域产生热量，所以能够快速且容易地转动光盘到自动聚焦和跟踪偏移，从而实现快速和高密度记录。 因此，可以容易地选择多个层来形成盘。