公开(公告)号：US20080219128A1

公开(公告)日：2008-09-11

申请号：US12038174

申请日：2008-02-27

申请人： Tatsuro Ide ,  Kenichi Shimada ,  Masahiko Takahashi ,  Takeshi Shimano ,  Kevin R. Curtis ,  Ken E. Anderson

发明人： Tatsuro Ide ,  Kenichi Shimada ,  Masahiko Takahashi ,  Takeshi Shimano ,  Kevin R. Curtis ,  Ken E. Anderson

IPC分类号： G11B7/00

CPC分类号： G11B7/00772 ,  G03H1/041 ,  G11B7/1353 ,  G11B7/1378

摘要： An optical pickup for recording a hologram by using an angle multiplexing method. An optical beam is separated into two beams, a signal beam and a reference beam having different convergence/divergence degrees, by using an optical component such as a diffraction lens. The signal and reference beams are made incident upon the same objective, and the optical component or the objective lens is moved in a direction perpendicular to an optical axis, to thereby realize angle multiplex recording. If an optical information recording medium is inclined, the optical component or the objective lens is moved along the direction along which the optical information recording medium moved to change an angle of the reference beam incident upon the optical information recording medium and compensate for degradation of a reproduction signal.

摘要翻译： 一种用于通过使用角度复用方法记录全息图的光学拾取器。 通过使用诸如衍射透镜的光学部件，将光束分离成两束，信号光束和具有不同会聚/发散度的参考光束。 信号和参考光束入射到相同的物镜上，并且光学部件或物镜在垂直于光轴的方向上移动，从而实现角度多路复用记录。 如果光学信息记录介质倾斜，则光学部件或物镜沿着光学信息记录介质移动的方向移动以改变入射在光学信息记录介质上的参考光束的角度并补偿光学信息记录介质的劣化 再现信号。

公开(公告)号：US08004950B2

公开(公告)日：2011-08-23

申请号：US12038174

申请日：2008-02-27

申请人： Tatsuro Ide ,  Kenichi Shimada ,  Masahiko Takahashi ,  Takeshi Shimano ,  Kevin R. Curtis ,  Ken E. Anderson

发明人： Tatsuro Ide ,  Kenichi Shimada ,  Masahiko Takahashi ,  Takeshi Shimano ,  Kevin R. Curtis ,  Ken E. Anderson

IPC分类号： G11B7/00

CPC分类号： G11B7/00772 ,  G03H1/041 ,  G11B7/1353 ,  G11B7/1378

摘要： An optical pickup for recording a hologram by using an angle multiplexing method. An optical beam is separated into two beams, a signal beam and a reference beam having different convergence/divergence degrees, by using an optical component such as a diffraction lens. The signal and reference beams are made incident upon the same objective, and the optical component or the objective lens is moved in a direction perpendicular to an optical axis, to thereby realize angle multiplex recording. If an optical information recording medium is inclined, the optical component or the objective lens is moved along the direction along which the optical information recording medium moved to change an angle of the reference beam incident upon the optical information recording medium and compensate for degradation of a reproduction signal.

摘要翻译： 一种用于通过使用角度复用方法记录全息图的光学拾取器。 通过使用诸如衍射透镜的光学部件，将光束分离成两束，信号光束和具有不同会聚/发散度的参考光束。 信号和参考光束入射到相同的物镜上，并且光学部件或物镜在垂直于光轴的方向上移动，从而实现角度多路复用记录。 如果光学信息记录介质倾斜，则光学部件或物镜沿着光学信息记录介质移动的方向移动以改变入射在光学信息记录介质上的参考光束的角度并补偿光学信息记录介质的劣化 再现信号。

公开(公告)号：US07990830B2

公开(公告)日：2011-08-02

申请号：US12038150

申请日：2008-02-27

申请人： Kenichi Shimada ,  Tatsuro Ide ,  Kevin R. Curtis ,  Ken E. Anderson

发明人： Kenichi Shimada ,  Tatsuro Ide ,  Kevin R. Curtis ,  Ken E. Anderson

IPC分类号： G11B7/00

CPC分类号： G11B7/0065 ,  G11B7/1356 ,  G11B7/1378

摘要： In holographic recording, it is important to form stably an interference fringe between a reference beam and a signal beam in a holographic storage medium. To suppress factors degrading stability of the interference fringe, such as fluctuation of atmospheric air, position displacement of optical components and the like during propagation of the reference and signal beams, an optical pickup and an optical information recording/reproducing apparatus adopt an optical system structure providing a higher proportion of optical components shared by the reference and signal beams optical path than conventional optical system structure. To increase the proportion of shared optical components, the signal beam and the reference beam pass through the PBS prism as parallel beams and a concave lens is placed on a reference beam path just before the objective lens.

摘要翻译： 在全息记录中，重要的是在全息存储介质中稳定地在参考光束和信号光束之间形成干涉条纹。 为了抑制在参考信号和信号光束传播期间降低干扰条纹的稳定性的因素，例如大气的波动，光学部件的位置位移等，光学拾取器和光学信息记录/再现装置采用光学系统结构 提供比传统光学系统结构更高比例的参考和信号光束光路共享的光学部件。 为了增加共享光学部件的比例，信号光束和参考光束通过PBS棱镜作为平行光束，并且将凹透镜放置在恰好在物镜之前的参考光束路径上。

公开(公告)号：US20080225670A1

公开(公告)日：2008-09-18

申请号：US12038150

申请日：2008-02-27

申请人： Kenichi Shimada ,  Tatsuro Ide ,  Kevin R. Curtis ,  Ken E. Anderson

发明人： Kenichi Shimada ,  Tatsuro Ide ,  Kevin R. Curtis ,  Ken E. Anderson

IPC分类号： G11B7/00

CPC分类号： G11B7/0065 ,  G11B7/1356 ,  G11B7/1378

摘要： In holographic recording, it is important to form stably an interference fringe between a reference beam and a signal beam in a holographic storage medium. To suppress factors degrading stability of the interference fringe, such as fluctuation of atmospheric air, position displacement of optical components and the like during propagation of the reference and signal beams, an optical pickup and an optical information recording/reproducing apparatus adopt an optical system structure providing a higher proportion of optical components shared by the reference and signal beams optical path than conventional optical system structure. To increase the proportion of shared optical components, the signal beam and the reference beam pass through the PBS prism as parallel beams and a concave lens is placed on a reference beam path just before the objective lens.

摘要翻译： 在全息记录中，重要的是在全息存储介质中稳定地在参考光束和信号光束之间形成干涉条纹。 为了抑制在参考信号和信号光束传播期间降低干扰条纹的稳定性的因素，例如大气的波动，光学部件的位置位移等，光学拾取器和光学信息记录/再现装置采用光学系统结构 提供比传统光学系统结构更高比例的参考和信号光束光路共享的光学部件。 为了增加共享光学部件的比例，信号光束和参考光束通过PBS棱镜作为平行光束，并且将凹透镜放置在恰好在物镜之前的参考光束路径上。

公开(公告)号：US20100271921A1

公开(公告)日：2010-10-28

申请号：US12680612

申请日：2008-08-06

申请人： Kenichi Shimada ,  Tatsuro Ide ,  Takeshi Shimano ,  Harukazu Miyamoto

发明人： Kenichi Shimada ,  Tatsuro Ide ,  Takeshi Shimano ,  Harukazu Miyamoto

IPC分类号： G11B7/00

CPC分类号： G03H1/02 ,  G03H1/0256 ,  G03H1/22 ,  G03H2222/56 ,  G03H2223/19 ,  G03H2223/24 ,  G03H2250/33 ,  G03H2250/42 ,  G11B7/0065 ,  G11B7/24044

摘要： A holographic recording medium in which information can be reproduced by phase conjugate beam without requiring a mirror for obtaining the phase conjugate beam and its driving part and recording density is not reduced. The recording medium includes a recording layer in which an interference pattern is recorded and a light absorption/transmission layer which can be reversibly changed to be in a first state where signal beam and reference beam passed through the recording layer are absorbed at the time of recording of information and a second state where the reference beam is transmitted at the time of reproduction of information, and the reference beam transmitted through the light absorption/transmission layer is reflected by a reflection layer to produce the phase conjugate beam.

摘要翻译： 可以通过相位共轭光再现信息的全息记录介质，而不需要用于获得相位共轭光束的反射镜及其驱动部分和记录密度。 记录介质包括其中记录有干涉图案的记录层和可以可逆地改变为在记录时吸收信号束和参考光束通过记录层的第一状态的光吸收/透射层 的信息和在再现信息时发送参考光束的第二状态，并且通过光吸收/透射层透射的参考光束被反射层反射以产生相位共轭光束。

公开(公告)号：US20080170479A1

公开(公告)日：2008-07-17

申请号：US11829121

申请日：2007-07-27

申请人： TAKESHI SHIMANO ,  Tatsuro Ide ,  Kenichi Shimada

发明人： TAKESHI SHIMANO ,  Tatsuro Ide ,  Kenichi Shimada

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/0065 ,  G11B7/128 ,  G11B7/1356 ,  G11B7/1398

摘要： In an information recording apparatus using a hologram, a signal area of the light flux to be recorded is secured to be as wide as possible and the optical power loss is depressed during reproduction process. For this reason, almost the entire surface of the spatial light modulator is allocated as a signal area and the reference beam is collected on a micro mirror placed on its optical axis.

摘要翻译： 在使用全息图的信息记录装置中，要记录的光束的信号区域被确保为尽可能宽并且在再现处理期间光功率损失被抑制。 为此，将空间光调制器的整个表面几乎分配为信号区域，并将参考光束收集在放置在其光轴上的微镜上。

公开(公告)号：US08699310B2

公开(公告)日：2014-04-15

申请号：US12680612

申请日：2008-08-06

申请人： Kenichi Shimada ,  Tatsuro Ide ,  Takeshi Shimano ,  Harukazu Miyamoto

发明人： Kenichi Shimada ,  Tatsuro Ide ,  Takeshi Shimano ,  Harukazu Miyamoto

IPC分类号： G11B7/0065

CPC分类号： G03H1/02 ,  G03H1/0256 ,  G03H1/22 ,  G03H2222/56 ,  G03H2223/19 ,  G03H2223/24 ,  G03H2250/33 ,  G03H2250/42 ,  G11B7/0065 ,  G11B7/24044

摘要： A holographic recording medium in which information can be reproduced by phase conjugate beam without requiring a mirror for obtaining the phase conjugate beam and its driving part and recording density is not reduced. The recording medium includes a recording layer in which an interference pattern is recorded and a light absorption/transmission layer which can be reversibly changed to be in a first state where signal beam and reference beam passed through the recording layer are absorbed at the time of recording of information and a second state where the reference beam is transmitted at the time of reproduction of information, and the reference beam transmitted through the light absorption/transmission layer is reflected by a reflection layer to produce the phase conjugate beam.

摘要翻译： 可以通过相位共轭光再现信息的全息记录介质，而不需要用于获得相位共轭光束的反射镜及其驱动部分和记录密度。 记录介质包括其中记录有干涉图案的记录层和可以可逆地改变为在记录时吸收信号束和参考光束通过记录层的第一状态的光吸收/透射层 的信息和在再现信息时发送参考光束的第二状态，并且通过光吸收/透射层透射的参考光束被反射层反射以产生相位共轭光束。

公开(公告)号：US08305862B2

公开(公告)日：2012-11-06

申请号：US12116245

申请日：2008-05-07

申请人： Kenichi Shimada ,  Tatsuro Ide

发明人： Kenichi Shimada ,  Tatsuro Ide

IPC分类号： G11B7/00

CPC分类号： G03H1/18 ,  G03H1/181 ,  G03H1/182 ,  G11B7/0065 ,  G11B7/127 ,  G11B7/13 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/1378 ,  G11B2007/0006

摘要： The optical information recording and reproducing device utilizing holography requires the optical system to generate the signal beam and the reference beam to be irradiated to the holographic storage medium as well as another optical system to generate the curing light beam to be irradiated to the holographic storage medium. Furthermore, from the viewpoint of backward compatibility, if the same device is used for recording or reproduction on the conventional optical discs represented by Blu-ray Disc, another optical system adaptable to recording and reproduction on these optical disks is required. This means the optical system configurations become complicated and larger in size. One solution for downsizing is to use the reference beam also as the curing light beam. Another way is sharing of optical path for curing light beam and for the reference beam. Furthermore, it is possible to share the light source for generating the curing light beam and for generating the recording or reproducing light beam. In such way, optical system configurations become simple.

摘要翻译： 利用全息术的光学信息记录和再现装置需要光学系统产生要照射到全息存储介质的信号光束和参考光束以及另一个光学系统，以产生照射到全息存储介质的固化光束 。 此外，从向后兼容性的观点出发，如果在由蓝光光盘所表示的传统光盘上使用相同的设备进行记录或再现，则需要在这些光盘上适用于记录和再现的另一光学系统。 这意味着光学系统的配置变得复杂并且尺寸更大。 用于小型化的一个解决方案是使用参考光束也作为固化光束。 另一种方式是共享用于固化光束和参考光束的光路。 此外，可以共享用于产生固化光束的光源和用于产生记录或再现光束。 以这种方式，光学系统配置变得简单。

公开(公告)号：US07817705B2

公开(公告)日：2010-10-19

申请号：US12043161

申请日：2008-03-06

申请人： Kenichi Shimada ,  Tatsuro Ide

发明人： Kenichi Shimada ,  Tatsuro Ide

IPC分类号： H01S3/08 ,  H01S3/10 ,  H01S3/13

CPC分类号： G11B7/1362 ,  G11B7/0065 ,  G11B7/126 ,  G11B7/1356 ,  H01S5/005 ,  H01S5/0071

摘要： The hologram recording technology expected to realize ultrahigh-density information recording is one of the post Blu-ray Disc technology. When we think about developing a drive based on this technology and suitable for consumer electronics, it is considered most desirable from the viewpoint of upward compatibility to solve the problem of the BD-compatibility. The problem in sharing the laser light source between the hologram recording device and the current optical disc device, however, is that the hologram recording requires a high-coherent, single-mode light beam, while the current optical discs requires a low-coherent, multi-mode light beam. In point of the coherence of the light source, the above two cases require the light beams of the characteristics opposite to each other, and this presents an important task.For the purpose of solving the above-mentioned problem, the present invention is to adopt the variable wavelength type laser light source device composed of a semiconductor laser and a diffraction grating, wherein a polarization direction converter and a polarized beam splitter are placed in the optical path between the above semiconductor laser and the above diffraction grating.

摘要翻译： 预期实现超高密度信息记录的全息记录技术是蓝光光盘技术之一。 当我们考虑开发基于这种技术并适合消费电子产品的驱动器时，从向上兼容性的角度来看，最为理想的是解决BD兼容性的问题。 然而，在全息记录装置和当前光盘装置之间共享激光光源的问题在于，全息记录需要高相干单模光束，而目前的光盘需要低相干， 多模光束。 在光源的相干性方面，上述两种情况需要具有彼此相反特性的光束，这是一项重要任务。 为了解决上述问题，本发明采用由半导体激光器和衍射光栅构成的可变波长型激光光源装置，其中偏振方向转换器和偏振分束器被放置在光学 上述半导体激光器和上述衍射光栅之间的路径。

公开(公告)号：US20090086605A1

公开(公告)日：2009-04-02

申请号：US12102966

申请日：2008-04-15

申请人： Tatsuro Ide ,  Kenichi Shimada

发明人： Tatsuro Ide ,  Kenichi Shimada

IPC分类号： G11B7/00

CPC分类号： G11B7/00772 ,  G11B7/0065 ,  G11B7/08564 ,  G11B7/0956

摘要： An object of this invention is to achieve a hologram information recording and recovering device using an angle multiplexing method capable of reducing crosstalk from an adjacent hologram. When a set of incident angles of reference light on a disc in recording a hologram using the angle multiplexing method is expressed by {θ}=[θ1, θ2, . . . , θM], an incident angle {θ} of reference light is changed according to a position on an optical information recording medium or a track position.

摘要翻译： 本发明的目的是实现使用能够减少相邻全息图的串扰的角度复用方法的全息图信息记录和恢复装置。 当使用角度多路复用方法记录全息图时盘上参考光的一组入射角由{θ1 =θ1，θ2，... 。 。 ，θM]，参考光的入射角θ根据光学信息记录介质上的位置或轨道位置而改变。