公开(公告)号：US09653108B2

公开(公告)日：2017-05-16

申请号：US14428154

申请日：2012-09-14

Applicant: Manabu Shiozawa ,  Koichi Watanabe ,  Takao Watanabe

Inventor： Manabu Shiozawa ,  Koichi Watanabe ,  Takao Watanabe

IPC: G03H1/10 ,  G03H1/02 ,  G11B7/1267 ,  G11B7/00

CPC classification number: G11B7/1267 ,  G11B2007/0013

Abstract: When recording is performed by focusing a short pulse laser on an inside of a transparent medium such as quartz glass, and forming a minute deformed region in which the refractive index is different from that of surroundings thereof, it is difficult to ensure a recording quality. Therefore, a recorded dot length in a depth direction is monitored 111 and a power of the laser light is adjusted based on the monitored recorded dot length, or a difference between a focus position where a region of the recorded dots appears brighter than the surroundings and a focus position where the region of the recorded dots appears darker than the surroundings is measured and the power of the laser light is adjusted based on the difference.

公开(公告)号：US09542969B2

公开(公告)日：2017-01-10

申请号：US14403460

申请日：2012-05-28

Applicant: Takao Watanabe ,  Manabu Shiozawa ,  Koichi Watanabe ,  Shigeharu Kimura

Inventor： Takao Watanabe ,  Manabu Shiozawa ,  Koichi Watanabe ,  Shigeharu Kimura

IPC: G11B7/013 ,  G11B7/005 ,  G11B7/00

CPC classification number: G11B7/013 ,  G11B7/005 ,  G11B2007/0009 ,  G11B2007/0013

Abstract: When a simple magnification optical system is used in reproduction of a recording medium in which a large number of minute modified regions are three-dimensionally formed inside solid matter, contrast is insufficient and interlayer crosstalk is increased, and therefore, it is impossible to take a sufficient S/N ratio. Provided is a recording medium in which at least one layer is configured by a set of two adjacent sub-layers, and dots on a sub-layer correspond to a recording data ‘1’ and dots on the other sub-layer correspond to ‘0’. These data are played back.

Abstract translation: 当简单放大光学系统用于在固体物质内三维地形成大量微小修改区域的记录介质的再现时，对比度不足，层间串扰增加，因此不可能 充足的S / N比。 提供了一种记录介质，其中由一组两个相邻的子层构成至少一个层，子层上的点对应于记录数据'1'，另一个子层上的点对应于'0 '。 播放这些数据。

公开(公告)号：US20150255106A1

公开(公告)日：2015-09-10

申请号：US14428154

申请日：2012-09-14

Applicant: Manabu Shiozawa ,  Koichi Watanabe ,  Takao Watanabe

Inventor： Manabu Shiozawa ,  Koichi Watanabe ,  Takao Watanabe

IPC: G11B7/1267

CPC classification number: G11B7/1267 ,  G11B2007/0013

Abstract: When recording is performed by focusing a short pulse laser on an inside of a transparent medium such as quartz glass, and forming a minute deformed region in which the refractive index is different from that of surroundings thereof, it is difficult to ensure a recording quality.Therefore, a recorded dot length in a depth direction is monitored and a power of the laser light is adjusted based on the monitored recorded dot length, or a difference between a focus position where a region of the recorded dots appears brighter than the surroundings and a focus position where the region of the recorded dots appears darker than the surroundings is measured and the power of the laser light is adjusted based on the difference.

Abstract translation: 当通过将短脉冲激光聚焦在诸如石英玻璃的透明介质的内部进行记录并且形成折射率不同于其周围的微小变形区域时，难以确保记录质量。 因此，监视深度方向上的记录点长度，并且基于所监视的记录点长度调整激光的功率，或者记录的点的区域比周围环境更亮的聚焦位置之间的差异以及 测量记录点的区域比周围环境更暗的聚焦位置，并且基于该差调整激光的功率。

公开(公告)号：US08279732B2

公开(公告)日：2012-10-02

申请号：US12640353

申请日：2009-12-17

Applicant: Koichi Watanabe ,  Manabu Shiozawa

Inventor： Koichi Watanabe ,  Manabu Shiozawa

IPC: G11B11/00

CPC classification number: G11B7/126

Abstract: An HF waveform prevailing during a read operation varies due, for instance, to changes in the ambient temperature of an optical disc drive and variations in the characteristics of a laser. This degrades read performance and decreases the number of rewritable disc read operations. To address the above problems, an optical disc drive and an optical information read method are disclosed. The disclosed optical disc drive and optical information read method vary an HF amplitude in relation to the resistance, differential resistance, or temperature of the laser.

Abstract translation: 在读取操作期间存在的HF波形由于例如光盘驱动器的环境温度的变化和激光器的特性的变化而变化。 这会降低读取性能并减少可重写光盘读取操作的数量。 为了解决上述问题，公开了一种光盘驱动器和光信息读取方法。 所公开的光盘驱动器和光信息读取方法相对于激光器的电阻，差分电阻或温度改变HF振幅。

公开(公告)号：US08228780B2

公开(公告)日：2012-07-24

申请号：US12940561

申请日：2010-11-05

Applicant: Manabu Shiozawa

Inventor： Manabu Shiozawa

IPC: G11B7/00

CPC classification number: G11B7/1263 ,  G11B2007/0013

Abstract: Proposed is an optical disk device capable of optimally adjusting a current value of a direct current and a high frequency superimposed current for driving a laser diode. This optical disk device includes a laser driver for superimposing a high frequency current on a direct current to obtain a drive current and supplying the drive current to the laser beam source and driving the laser beam source, and a control unit for adjusting a current value of the direct current and/or the high frequency superimposed current supplied by the laser driver to the laser beam source based on the servo signal or the reproduction signal. The control unit adjusts the current value of the direct current and/or the high frequency superimposed current so that a value representing a waveform fluctuation of the servo signal or the reproduction signal satisfies a specified value of the waveform fluctuation, a value representing a reproduction performance of the reproduction signal satisfies a specified value of the reproduction performance, and a value representing a durability performance of the optical disk in relation to the laser beam satisfies a specified value of the durability performance.

Abstract translation: 提出了能够最佳地调整用于驱动激光二极管的直流电流值和高频叠加电流的光盘装置。 该光盘装置包括激光驱动器，用于将高频电流叠加在直流电流上以获得驱动电流，并将驱动电流提供给激光束源并驱动激光束源;以及控制单元，用于调整电流值 由激光驱动器基于伺服信号或再现信号向激光束源提供的直流电流和/或高频叠加电流。 控制单元调整直流电流和/或高频叠加电流的电流值，使得表示伺服信号或再现信号的波形波动的值满足波形波动的规定值，表示再现性能的值 的再现信号满足规定的再现性能值，并且表示光盘相对于激光束的耐久性能的值满足耐久性能的规定值。

公开(公告)号：US07489610B2

公开(公告)日：2009-02-10

申请号：US12183929

申请日：2008-07-31

Applicant: Shinji Fujita ,  Takeshi Maeda ,  Manabu Shiozawa ,  Takahiro Kurokawa

Inventor： Shinji Fujita ,  Takeshi Maeda ,  Manabu Shiozawa ,  Takahiro Kurokawa

IPC: G11B5/09

CPC classification number: G11B7/00456 ,  G11B7/0062

Abstract: An optical disk recording method includes the steps of: providing a multi-pulse chain from a recording wave; independently changing the pulse rise timing and pulse fall timing (pulse width) of the first pulse in the multi-pulse chain in accordance with a preceding space length and a recording mark length; changing the pulse rise timing and pulse fall timing (pulse width) in accordance with a following space length and the recording mark length in a predetermined timing or in independence; and in relation to the smallest mark recorded by irradiation with mono pulse, changing the rise timing in accordance with the preceding space length and the recording mark length and the fall timing (pulse width) in accordance with the following space length and recording mark length, compensating various optical disks different in recording material without change of the fundamental waveform.

公开(公告)号：US07471605B2

公开(公告)日：2008-12-30

申请号：US10919489

申请日：2004-08-17

Applicant: Shinji Fujita ,  Takeshi Maeda ,  Manabu Shiozawa ,  Takahiro Kurokawa

Inventor： Shinji Fujita ,  Takeshi Maeda ,  Manabu Shiozawa ,  Takahiro Kurokawa

IPC: G11B5/09

CPC classification number: G11B7/00456 ,  G11B7/0062

Abstract: An optical disk recording method includes the steps of: providing a multi-pulse chain from a recording wave; independently changing the pulse rise timing and pulse fall timing (pulse width) of the first pulse in the multi-pulse chain in accordance with a preceding space length and a recording mark length; changing the pulse rise timing and pulse fall timing (pulse width) in accordance with a following space length and the recording mark length in a predetermined timing or in independence; and in relation to the smallest mark recorded by irradiation with mono pulse, changing the rise timing in accordance with the preceding space length and the recording mark length and the fall timing (pulse width) in accordance with the following space length and recording mark length, compensating various optical disks different in recording material without change of the fundamental waveform.

Abstract translation: 光盘记录方法包括以下步骤：从记录波提供多脉冲链; 根据先前的空间长度和记录标记长度独立地改变多脉冲链中的第一脉冲的脉冲上升时间和脉冲下降时间（脉冲宽度）; 根据以下空间长度和记录标记长度在预定时间或独立性中改变脉冲上升时间和脉冲下降时间（脉冲宽度）; 并且相对于通过单脉冲照射记录的最小标记，根据以前的空格长度和记录标记长度以及根据以下空格长度和记录标记长度的下降时间（脉冲宽度）来改变上升时间， 补偿记录材料不同的各种光盘，而不改变基波形。

公开(公告)号：US08335140B2

公开(公告)日：2012-12-18

申请号：US13179620

申请日：2011-07-11

Applicant: Manabu Shiozawa ,  Takakiyo Yasukawa

Inventor： Manabu Shiozawa ,  Takakiyo Yasukawa

IPC: G11B15/04

CPC classification number: G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

Abstract: The present invention provides a multilayer optical disc and an optical disc drive which can identify recording layers without performing tracking servo control or changing the structure of the disc. In a multilayer optical disc 100, the recording layer includes a layer identification region 101 having a recording pattern for layer identification, the layer identification region 101 including a layer specific region 102 having a specific pattern and a common region 103 having a common pattern different from the specific pattern, the layer specific region 102 being provided at a different radial position in each of the recording layers. The optical disc drive detects the layer specific region 102 having the specific pattern from the layer identification region 101 of the multilayer optical disc 100, and identifies the current layer based on the radial position of the layer specific region.

Abstract translation: 本发明提供一种多层光盘和光盘驱动器，其可以在不执行跟踪伺服控制或改变盘的结构的情况下识别记录层。 在多层光盘100中，记录层包括具有用于层识别的记录图案的层识别区域101，层识别区域101包括具有特定图案的层特定区域102和具有不同于 具体图案，层特定区域102设置在每个记录层中的不同径向位置处。 光盘驱动器从多层光盘100的层识别区域101检测具有特定图案的层特定区域102，并且基于层特定区域的径向位置识别当前层。

公开(公告)号：US08243568B2

公开(公告)日：2012-08-14

申请号：US12622156

申请日：2009-11-19

Applicant: Manabu Shiozawa

Inventor： Manabu Shiozawa

IPC: G11B20/10

CPC classification number: G11B7/1267 ,  G11B7/1263 ,  G11B2007/0013

Abstract: An optical disc apparatus for recording or reproducing on or from an optical disc, comprising a laser light source for emitting a laser beam; a drive portion for driving the laser light source; a detection portion for detecting the emission power of the laser beam; and means for focusing the laser beam onto the optical disc, wherein information is reproduced by a reproducing power varied according to a recording power to obtain reproducing signals having necessary quality while suppressing deterioration of the recording quality due to the reproducing power.

Abstract translation: 一种用于在光盘上记录或从光盘再现的光盘装置，包括用于发射激光束的激光光源; 用于驱动激光光源的驱动部分; 用于检测激光束的发射功率的检测部分; 以及用于将激光束聚焦到光盘上的装置，其中通过根据记录功率变化的再现功率再现信息，以获得具有必要质量的再现信号，同时抑制由再现功率引起的记录质量的劣化。

公开(公告)号：US08358569B2

公开(公告)日：2013-01-22

申请号：US13099093

申请日：2011-05-02

Applicant: Shinji Fujita ,  Takeshi Maeda ,  Manabu Shiozawa ,  Takahiro Kurokawa

Inventor： Shinji Fujita ,  Takeshi Maeda ,  Manabu Shiozawa ,  Takahiro Kurokawa

IPC: G11B7/00

CPC classification number: G11B7/00456 ,  G11B7/0062

Abstract: An optical disk recording method includes the steps of: providing a multi-pulse chain from a recording wave; independently changing the pulse rise timing and pulse fall timing (pulse width) of the first pulse in the multi-pulse chain in accordance with a preceding space length and a recording mark length; changing the pulse rise timing and pulse fall timing (pulse width) in accordance with a following space length and the recording mark length in a predetermined timing or in independence; and in relation to the smallest mark recorded by irradiation with mono pulse, changing the rise timing in accordance with the preceding space length and the recording mark length and the fall timing (pulse width) in accordance with the following space length and recording mark length, compensating various optical disks different in recording material without change of the fundamental waveform.