公开(公告)号：US09170562B2

公开(公告)日：2015-10-27

申请号：US13093896

申请日：2011-04-26

Applicant: Kenichi Shimada ,  Toshiki Ishii

Inventor： Kenichi Shimada ,  Toshiki Ishii

IPC: G03H1/12 ,  G03H1/22 ,  G11B7/1369 ,  G11B7/1392 ,  G11B7/0065

CPC classification number: G03H1/12 ,  G03H1/22 ,  G03H1/2286 ,  G03H2222/35 ,  G03H2222/56 ,  G11B7/0065 ,  G11B7/1369 ,  G11B7/13927

Abstract: An optical beam with the same amplitude distribution and phase distribution as those of the signal beam used for recording is radiated to the hologram recording medium via an optical system of the signal beam prior to reproduction so that the optical beam with the amplitude and phase of the reference beam upon recording is generated through diffraction. A wavefront sensor detects the wavefront configuration of the diffraction beam and obtains preliminarily the suitable wavefront of the reference beam for reproduction. The wavefront control element preliminarily corrects the wavefront of the reference beam to an optimum wavefront.

Abstract translation: 具有与用于记录的信号光束相同的幅度分布和相位分布的光束在再现之前通过信号光束的光学系统被辐射到全息图记录介质，使得具有幅度和相位的光束 通过衍射产生记录时的参考光束。 波前传感器检测衍射光束的波阵面，并预先获得用于再现的参考光束的合适波阵面。 波前控制元件预先将参考光束的波前校正到最佳波前。

公开(公告)号：US08300511B2

公开(公告)日：2012-10-30

申请号：US13089837

申请日：2011-04-19

Applicant: Kenichi Shimada ,  Toshiki Ishii ,  Taku Hoshizawa ,  Motoyuki Suzuki

Inventor： Kenichi Shimada ,  Toshiki Ishii ,  Taku Hoshizawa ,  Motoyuki Suzuki

IPC: G11B7/00

CPC classification number: G11B7/0065 ,  G03H1/26 ,  G11B7/00772 ,  G11B7/083 ,  G11B7/08564 ,  G11B7/128

Abstract: A holographic memory apparatus comprises first phase modulation means that adds phase information to each pixel of a signal beam to generate page data at recording time; oscillator light generation means that generates an oscillator light that is superimposed on, and interferes with, a diffracted light from a holographic recording medium at reproduction time; second phase modulation means that adds phase information to the oscillator light; and light detection means that detects an interference light generated by superimposing the oscillator light and the diffracted light from the holographic recording medium.

Abstract translation: 全息存储装置包括第一相位调制装置，其将相位信息添加到信号光束的每个像素，以在记录时间产生页数据; 振荡光产生装置，其在再现时产生叠加在来自全息记录介质的衍射光并与之干涉的振荡光; 将相位信息加到振荡器光的第二相位调制装置; 以及光检测装置，其检测通过叠加振荡光和来自全息记录介质的衍射光产生的干涉光。

公开(公告)号：US08228771B2

公开(公告)日：2012-07-24

申请号：US12056430

申请日：2008-03-27

Applicant: Takuya Himi ,  Toshiki Ishii ,  Tsuyoshi Toda

Inventor： Takuya Himi ,  Toshiki Ishii ,  Tsuyoshi Toda

IPC: G11B11/00

CPC classification number: G11B20/182 ,  G11B7/00456 ,  G11B7/1267 ,  G11B27/36 ,  G11B2020/1275 ,  G11B2220/2537

Abstract: In a recording/reproducing apparatus and a recording method, for enabling a high reliability on reproduction data are conducted the followings: recording a test mark within the test aria with a predetermined write strategy; obtaining signal amplitudes corresponding to a front portion, a middle portion, and a rear portion of the test mark, by reproducing the test mark; determining on whether the test mark has a desirable configuration or not, upon basis of at least one of ratios, defined between the amplitude of the front portion and the amplitude of the rear portion, and between the amplitude of the middle portion and the amplitude of the rear portion; correcting the write strategy if it is determined that the test mark has not the desirable configuration; and recording the information within the data area with the write strategy after the correction thereof.

Abstract translation: 在记录/再现装置和记录方法中，为了能够在再现数据上实现高可靠性，进行以下操作：以预定的写入策略在测试咏叹调中记录测试标记; 通过再现测试标记获得对应于测试标记的前部，中间部分和后部的信号幅度; 基于在前部的振幅和后部的振幅之间以及在中间部分的振幅和振幅之间限定的比例中的至少一个之后，确定测试标记是否具有期望的配置 后部; 如果确定测试标记没有期望的配置，则校正写入策略; 并在其修正之后用写入策略在数据区域内记录信息。

公开(公告)号：US20120050831A1

公开(公告)日：2012-03-01

申请号：US13085870

申请日：2011-04-13

Applicant: Kenichi SHIMADA ,  Toshiki ISHII ,  Motoyuki SUZUKI

Inventor： Kenichi SHIMADA ,  Toshiki ISHII ,  Motoyuki SUZUKI

IPC: G03H1/26 ,  G03H1/22

CPC classification number: G11B7/083 ,  G03H1/26 ,  G11B7/0065

Abstract: In a holographic memory of an angle multiple recording system, when a hologram is reproduced, a light beam of a different polarizing direction is irradiated as reference light to a hologram recording medium and diffracted light is detected from the hologram recording medium.

Abstract translation: 在角度多重记录系统的全息存储器中，当再现全息图时，将不同偏振方向的光束作为参考光照射到全息图记录介质上，并从全息图记录介质检测衍射光。

公开(公告)号：US20070121462A1

公开(公告)日：2007-05-31

申请号：US11488617

申请日：2006-07-19

Applicant: Toshiki Ishii ,  Tsuyoshi Toda ,  Tetsuya Fushimi ,  Masashi Imai

Inventor： Toshiki Ishii ,  Tsuyoshi Toda ,  Tetsuya Fushimi ,  Masashi Imai

IPC: G11B7/0045

CPC classification number: G11B7/00456 ,  G11B7/1267

Abstract: To provide a technology for improving the recording quality through edge correction of recording pulse in an optical disc apparatus. An optimum recording power of recording pulse is obtained through OPC processing according to a recording strategy with a first pulse timing; recording is performed by use of recording pulse with the optimum recording power; a first edge-shift amount of recording mark is measured from a reproduction signal to perform edge correction of recording pulse to form a second pulse timing of a recording strategy. Subsequently, recording is performed with pulse width variations of recording pulse to measure a second edge-shift amount of recording mark from a reproduction signal; and optimum edge positions of recording pulse are calculated based on the first edge-shift amount and the second edge-shift amount.

Abstract translation: 提供通过光盘装置中的记录脉冲的边缘校正来提高记录质量的技术。 通过根据具有第一脉冲定时的记录策略的OPC处理获得记录脉冲的最佳记录功率; 通过使用具有最佳记录功率的记录脉冲进行记录; 从再现信号测量记录标记的第一边缘移位量，以执行记录脉冲的边缘校正，以形成记录策略的第二脉冲定时。 随后，利用记录脉冲的脉冲宽度变化执行记录，以从再现信号测量记录标记的第二边缘移位量; 并且基于第一边缘移位量和第二边缘移位量来计算记录脉冲的最佳边缘位置。

公开(公告)号：US20060280090A1

公开(公告)日：2006-12-14

申请号：US11290510

申请日：2005-12-01

Applicant: Toshiki Ishii ,  Tsuyoshi Toda

Inventor： Toshiki Ishii ,  Tsuyoshi Toda

IPC: G11B5/09

CPC classification number: G11B7/126 ,  G11B7/00456 ,  G11B7/0079

Abstract: In a CAV recording of an optical disk, when a plurality of zones are provided, a write strategy is matched for a change in recording linear velocity in the zone so that recording quality can be assured, and recording power is controlled. The write strategy (pulse timing and power ratio) is optimized at the highest recording linear velocity of each zone and the setting of the power in each zone is controlled so that a relation between a recording linear velocity V and a recording power Po satisfies Po=CV (C is a coefficient which is obtained from the relation between Po and V at a zone end point), thereby assuring the reliability of recorded information.

公开(公告)号：US09105280B2

公开(公告)日：2015-08-11

申请号：US13085870

申请日：2011-04-13

Applicant: Kenichi Shimada ,  Toshiki Ishii ,  Motoyuki Suzuki

Inventor： Kenichi Shimada ,  Toshiki Ishii ,  Motoyuki Suzuki

IPC: G03H1/26 ,  G11B7/08 ,  G11B7/0065

CPC classification number: G11B7/083 ,  G03H1/26 ,  G11B7/0065

Abstract: In a holographic memory of an angle multiple recording system, when a hologram is reproduced, a light beam of a different polarizing direction is irradiated as reference light to a hologram recording medium and diffracted light is detected from the hologram recording medium.

Abstract translation: 在角度多重记录系统的全息存储器中，当再现全息图时，将不同偏振方向的光束作为参考光照射到全息图记录介质上，并从全息图记录介质检测衍射光。

公开(公告)号：US08908487B2

公开(公告)日：2014-12-09

申请号：US13305797

申请日：2011-11-29

Applicant: Makoto Hosaka ,  Toshiki Ishii

Inventor： Makoto Hosaka ,  Toshiki Ishii

IPC: G11B7/0065 ,  G11B7/007

CPC classification number: G11B7/0065 ,  G11B7/00772 ,  G11B2220/2504

Abstract: In reproduction of a two-dimensional page data from an optical information recording medium utilizing holography, a reproduced two-dimensional page data is divided into a plurality of areas each of which has a predetermined size, the divided two-dimensional areas are individually subjected to adaptive equalizing, and then are coupled to restore the condition of the original two-dimensional page data.

Abstract translation: 在从利用全息术的光学信息记录介质再现二维页面数据时，再现的二维页面数据被分成多个区域，每个区域都具有预定的尺寸，分割的二维区域分别经受 自适应均衡，然后耦合以恢复原始二维页面数据的条件。

公开(公告)号：US08520484B2

公开(公告)日：2013-08-27

申请号：US13088462

申请日：2011-04-18

Applicant: Yusuke Nakamura ,  Kenichi Shimada ,  Toshiki Ishii ,  Makoto Hosaka

Inventor： Yusuke Nakamura ,  Kenichi Shimada ,  Toshiki Ishii ,  Makoto Hosaka

IPC: G11B7/00

CPC classification number: G11B7/0065 ,  G11B7/08564

Abstract: In an optical information reproduction method for reproducing information using holography from a medium which records an interference pattern generated when overlapping a signal beam and a reference beam, the reference beam is radiated to the medium at a reference beam angle with a predetermined range for reproducing the information, a reproduction beam is generated by diffracting the reference beam with the interference pattern, the reproduction beam is detected by a photodetector; and the information is reproduced by processing a signal detected by the photodetector.

Abstract translation: 在用于从记录在信号光束和参考光束重叠时产生的干涉图案的介质中再现使用全息术的信息的光学信息再现方法中，参考光束以具有预定范围的参考光束角辐射到介质，以再现 信息，通过用干涉图案衍射参考光束来生成再现光束，再现光束由光电检测器检测; 并且通过处理由光电检测器检测的信号来再现信息。

公开(公告)号：US20120163152A1

公开(公告)日：2012-06-28

申请号：US13305797

申请日：2011-11-29

Applicant: Makoto HOSAKA ,  Toshiki ISHII

Inventor： Makoto HOSAKA ,  Toshiki ISHII

IPC: G11B20/10

CPC classification number: G11B7/0065 ,  G11B7/00772 ,  G11B2220/2504

Abstract: In reproduction of a two-dimensional page data from an optical information recording medium utilizing holography, a reproduced two-dimensional page data is divided into a plurality of areas each of which has a predetermined size, the divided two-dimensional areas are individually subjected to adaptive equalizing, and then are coupled to restore the condition of the original two-dimensional page data.

Abstract translation: 在从利用全息术的光学信息记录介质再现二维页面数据时，再现的二维页面数据被分成多个区域，每个区域都具有预定的尺寸，分割的二维区域分别经受 自适应均衡，然后耦合以恢复原始二维页面数据的条件。