公开(公告)号：US06697398B2

公开(公告)日：2004-02-24

申请号：US09968906

申请日：2001-10-03

申请人： Naoharu Yanagawa ,  Fumihiko Sano

发明人： Naoharu Yanagawa ,  Fumihiko Sano

IPC分类号： H01S310

CPC分类号： G11B7/126 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1365

摘要： A laser light intensity controller includes a polarizing beam splitter for passing most of one of an x-direction polarization component perpendicular to a direction in which a laser beam emitted from a light source travels and a y-direction polarization component parallel with the traveling direction and for reflecting a little portion of the one polarization component as monitoring light, and a photodetector for receiving the reflected monitoring light to generate a light intensity signal. The controller drives the light source in accordance with the light intensity signal. An optical element which passes passing only the one polarization component is installed between the light source and the polarizing beam splitter.

摘要翻译： 激光强度控制器包括偏振分束器，用于使垂直于从光源发射的激光束行进的方向的x方向偏振分量和与行进方向平行的y方向偏振分量的大部分方向传播， 用于反射一个偏振分量的一部分作为监测光;以及光电检测器，用于接收反射的监测光以产生光强度信号。 控制器根据光强度信号驱动光源。 通过仅通过一个偏振分量的光学元件安装在光源和偏振分束器之间。

公开(公告)号：US6075759A

公开(公告)日：2000-06-13

申请号：US6223

申请日：1998-01-13

申请人： Naoharu Yanagawa ,  Fumihiko Sano ,  Hiroshi Suzuki ,  Shinji Suzuki ,  Yasumitsu Suzuki ,  Masanori Nakahara

发明人： Naoharu Yanagawa ,  Fumihiko Sano ,  Hiroshi Suzuki ,  Shinji Suzuki ,  Yasumitsu Suzuki ,  Masanori Nakahara

IPC分类号： G11B11/10 ,  G11B7/003 ,  G11B7/0033 ,  G11B7/09 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/0031 ,  G11B7/0033 ,  G11B7/0901 ,  G11B11/1055

摘要： An optical record medium has an information record surface on which a plurality of circular arc tracks are arranged such that centers of the circular arc tracks are arranged in a straight line direction. An apparatus for optically recording and reproducing information onto and from the optical record medium is provided with: a rotatable optical system for emitting a light beam onto the circular arc track of the optical record medium which is being moved straight in the straight line direction, while being rotated with an rotational axis perpendicular to the information record surface; a straight moving device for relatively moving the rotatable optical system and the optical record medium to each other in the straight line direction; a detecting device for detecting a displacement amount from the circular arc track at an irradiated position on the information record surface of the light beam, on the basis of a reflection light from the circular arc track of the light beam, and outputting a displacement amount signal indicating the detected displacement amount; a perpendicularly moving device for relatively moving the optical record medium and the rotatable optical system to each other perpendicularly to the straight line direction such that the irradiated position approaches the circular arc track, on the basis of the outputted displacement amount signal; and a recording and reproducing device for recording and reproducing the information onto and from the optical record medium by use of the light beam emitted to the circular arc track.

摘要翻译： 光学记录介质具有信息记录表面，多个圆弧轨迹被布置成使得圆弧轨迹的中心沿直线方向排列。 一种用于在光学记录介质上光学地记录和再现信息的装置设置有：用于将光束发射到沿着直线方向直线移动的光学记录介质的圆弧轨道的可旋转光学系统，同时 以垂直于信息记录表面的旋转轴线旋转; 用于使可旋转光学系统和光学记录介质在直线方向上彼此相对移动的直线移动装置; 检测装置，用于根据来自光束的圆弧轨迹的反射光检测在光束的信息记录表面上的照射位置处的圆弧轨迹的位移量，并输出位移量信号 指示检测到的位移量; 垂直移动装置，用于基于输出的位移量信号，使光学记录介质和可旋转光学系统垂直于直线方向彼此相对移动，使得照射位置接近圆弧轨迹; 以及用于通过使用发射到圆弧轨道的光束将信息记录到光记录介质上并从光记录介质再现信息的记录和再现装置。

公开(公告)号：US5894460A

公开(公告)日：1999-04-13

申请号：US908176

申请日：1997-08-07

申请人： Naoharu Yanagawa ,  Fumihiko Sano ,  Hiroshi Suzuki ,  Shinji Suzuki ,  Yasumitsu Suzuki ,  Masanori Nakahara

发明人： Naoharu Yanagawa ,  Fumihiko Sano ,  Hiroshi Suzuki ,  Shinji Suzuki ,  Yasumitsu Suzuki ,  Masanori Nakahara

IPC分类号： G11B11/10 ,  G11B7/0033 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10532 ,  G11B11/10552 ,  G11B7/0033

摘要： A rotary type pickup apparatus adopting a light modulation system, is capable of over-writing and suitable for miniaturization. In the optical pickup apparatus constituted by a stationary optical part and a rotary optical part which comprises an objective lens and a light beam guiding device, a recording magnet and an initialization auxiliary magnet are provided in the rotary optical part, the recording magnet being disposed close to the objective lens and the initialization auxiliary magnet being positioned over a rotation circumference where the objective lens rotates. Further provided are a recording magnet and an initialization auxiliary magnet which are disposed so as to pinch a magnetooptical recording medium together with the objective lens, the initialization auxiliary magnet being positioned behind the recording magnet in a sending direction of an optical card.

摘要翻译： 采用光调制系统的旋转式拾取装置能够过写并适于小型化。 在由固定光学部件和包括物镜和光束引导装置的旋转光学部件构成的光学拾取装置中，在旋转光学部件中设置有记录磁体和初始化辅助磁体，记录磁体靠近 物镜和初始化辅助磁体位于物镜旋转的旋转圆周上。 进一步提供了一种记录磁体和初始化辅助磁体，其被设置成与物镜一起夹住磁光记录介质，初始化辅助磁体位于记录磁体的后面，沿着光卡的发送方向。

公开(公告)号：US07623435B2

公开(公告)日：2009-11-24

申请号：US11660540

申请日：2005-08-12

申请人： Naoharu Yanagawa ,  Fumihiko Sano

发明人： Naoharu Yanagawa ,  Fumihiko Sano

IPC分类号： G11B7/00

CPC分类号： G11B7/0045 ,  G11B7/09 ,  G11B7/0925 ,  G11B7/1275 ,  G11B7/1381

摘要： A sufficient S/N ratio in reproduction of an optical disk is achieved without complexing a circuit structure even if a data recording speed relative to the optical disk is increased. When data is recorded into an optical disk (DK), in an information recording and reproduction device (RP), both a first light beam and a second light beam are emitted at the same time. A sub-actuator section (20) is provided in addition to a main actuator (15) for correcting the displacement of light collecting spots caused by the displacement between the optical axis of the first beam and the optical axis of the second beam. Only the optical axis of the second light beam is adjusted by the sub-actuator section (20).

摘要翻译： 即使相对于光盘的数据记录速度增加​​，也不会使电路结构复杂化，从而实现光盘再现时的足够的S / N比。 当将数据记录到光盘（DK）中时，在信息记录和再现设备（RP）中，同时发射第一光束和第二光束。 除了用于校正由第一光束的光轴和第二光束的光轴之间的位移引起的聚光点的位移的主致动器（15）之外，还设置有副致动器部分（20）。 只有第二光束的光轴被副致动器部分（20）调节。

公开(公告)号：US5982733A

公开(公告)日：1999-11-09

申请号：US61967

申请日：1998-04-17

申请人： Naoharu Yanagawa ,  Fumihiko Sano

发明人： Naoharu Yanagawa ,  Fumihiko Sano

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/14

CPC分类号： G11B7/12 ,  G11B7/0937 ,  G11B7/14

摘要： An optical head emits a plurality of light beams onto an information record medium to perform a recording operation and/or a reproducing operation. The optical head is provided with: a plurality of light source, each outputting one of the light beams; an objective lens for collecting the light beams outputted from the light sources onto the information record medium; an optical element located on the optical path of only one of the light beams; a detector for receiving the light beam from the information record medium and outputting a detection signal; and a generating circuit for generating a drive signal based on the detection signal. The optical head is further provided with a dual-axis actuator for actuating the optical element in an optical axis direction of the light beam and in a substantially perpendicular direction to the optical axis direction in accordance with the drive signal. Because the objective lens is commonly used for all of the light beams while the optical element is actuated by the dual-axis actuator, the number of parts in the optical head is reduced while permitting the necessary collection of the light beams from the information record medium.

摘要翻译： 光头将多个光束发射到信息记录介质上以执行记录操作和/或再现操作。 光头设置有：多个光源，每个光源输出光束之一; 用于将从光源输出的光束收集到信息记录介质上的物镜; 仅位于光束中的一个的光路上的光学元件; 检测器，用于从信息记录介质接收光束并输出检测信号; 以及用于基于检测信号产生驱动信号的发生电路。 光头还设置有双轴致动器，用于根据驱动信号在光轴的光轴方向上沿光轴方向大致垂直的方向致动光学元件。 因为物镜通常用于所有光束，而光学元件由双轴致动器致动时，光头中的部件数量减少，同时允许来自信息记录介质的光束的必要收集 。

公开(公告)号：US5673245A

公开(公告)日：1997-09-30

申请号：US579351

申请日：1995-12-27

申请人： Naoharu Yanagawa ,  Susumu Nomura ,  Fumihiko Sano

发明人： Naoharu Yanagawa ,  Susumu Nomura ,  Fumihiko Sano

IPC分类号： G11B11/03 ,  G11B7/00 ,  G11B7/003 ,  G11B7/09 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105

CPC分类号： G11B7/0903 ,  G11B11/10576 ,  G11B7/0031 ,  G11B11/10532

摘要： An optical pickup device includes: a stationary optical system for emitting a light beam and for producing a tracking error signal; and a rotary optical system rotatable around a rotary axis. The rotary optical system includes: a dividing unit for dividing the light beam emitted from the stationary optical system into a main beam and sub-beams; an objective lens for converging the main beam and the sub-beams on a recording surface of an optical tape and for receiving the main beam and the sub-beams reflected by the recording surface; and a guiding unit for guiding the main beam and the sub-beams to the objective lens and for guiding the main beam and the sub-beams reflected by the recording surface to the stationary optical system. The dividing unit, the objective lens and the guiding unit are arranged so as to be integrally rotated along with the rotary optical system, and the dividing unit is arranged on an optical path of the light beam between the stationary optical system and the objective lens.

摘要翻译： 光拾取装置包括：用于发射光束并产生跟踪误差信号的固定光学系统; 以及围绕旋转轴线旋转的旋转光学系统。 旋转光学系统包括：分割单元，用于将从固定光学系统发射的光束分成主光束和子光束; 用于将主光束和子光束会聚在光带的记录表面上并用于接收主光束和由记录表面反射的子光束的物镜; 以及用于将主光束和子光束引导到物镜并用于将主光束和由记录表面反射的子光束引导到固定光学系统的引导单元。 分割单元，物镜和引导单元被布置成与旋转光学系统一体地旋转，并且分割单元布置在固定光学系统和物镜之间的光束的光路上。

公开(公告)号：US20070247997A1

公开(公告)日：2007-10-25

申请号：US11660540

申请日：2005-08-12

申请人： Naoharu Yanagawa ,  Fumihiko Sano

发明人： Naoharu Yanagawa ,  Fumihiko Sano

IPC分类号： G11B7/09

CPC分类号： G11B7/0045 ,  G11B7/09 ,  G11B7/0925 ,  G11B7/1275 ,  G11B7/1381

摘要： A sufficient S/N ratio in reproduction of an optical disk is achieved without complexing a circuit structure even if a data recording speed relative to the optical disk is increased. When data is recorded into an optical disk, in an information recording and reproduction device, both a first light beam and a second light beam are emitted at the same time. A sub-actuator section is provided in addition to a main actuator for correcting the displacement of light collecting spots caused by the displacement between the optical axis of the first beam and the optical axis of the second beam. Only the optical axis of the second light beam is adjusted by the sub-actuator section.

摘要翻译： 即使相对于光盘的数据记录速度增加​​，也不会使电路结构复杂化，从而实现光盘再现时的足够的S / N比。 当将数据记录到光盘中时，在信息记录和再现装置中，同时发射第一光束和第二光束。 除了用于校正由第一光束的光轴与第二光束的光轴之间的位移引起的聚光斑的位移的主致动器之外，还设置有副致动器部。 只有第二光束的光轴被副致动器部分调节。

公开(公告)号：US06731662B2

公开(公告)日：2004-05-04

申请号：US09968907

申请日：2001-10-03

申请人： Naoharu Yanagawa ,  Fumihiko Sano

发明人： Naoharu Yanagawa ,  Fumihiko Sano

IPC分类号： H01S313

CPC分类号： G11B7/126 ,  G11B7/1356

摘要： A laser light intensity controller includes a polarizing beam splitter for passing most of one of an x-direction polarization component perpendicular to a direction in which a laser beam emitted from a light source travels and a y-direction polarization component parallel with the traveling direction and for reflecting a little portion of the one polarization component as monitoring light, and a photodetector for receiving the reflected monitoring light to generate a light intensity signal. The controller drives the light source in accordance with the light intensity signal. The photodetector reflects the other of the x-direction polarization component and the y-direction polarization component and is not sensitive thereto, and absorbs the one polarization component and is sensitive thereto.

摘要翻译： 激光强度控制器包括偏振分束器，用于使垂直于从光源发射的激光束行进的方向的x方向偏振分量和与行进方向平行的y方向偏振分量的大部分方向传播， 用于反射一个偏振分量的一部分作为监测光;以及光电检测器，用于接收反射的监测光以产生光强度信号。 控制器根据光强度信号驱动光源。 光检测器反射x方向偏振分量和y方向偏振分量中的另一个，并且对其不敏感，并且吸收一个偏振分量并且对其敏感。

公开(公告)号：US5555538A

公开(公告)日：1996-09-10

申请号：US399099

申请日：1995-03-03

申请人： Naoharu Yanagawa ,  Fumihiko Sano

发明人： Naoharu Yanagawa ,  Fumihiko Sano

IPC分类号： G11B7/125 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1356

摘要： An optical pickup includes: a laser diode for emitting p-polarized light, the laser diode having unit for controlling output power of the p-polarized light by detecting power of the emitted light in front thereof; a photodetector for receiving a laser light and outputting a signal corresponding to quantity of the laser light received; a polarization prism for transmitting and guiding the emitted light to an optical disc on which information is recorded by applying heat thereon, and for reflecting and guiding at least a portion of the light reflected by the optical disc to the photodetector. The optical pickup substantially satisfies the following conditions:60 [%].ltoreq.Tp.ltoreq.90 [%],14 [%].ltoreq.Rs [%],Rp=100-Tp [%], andTs=100-Rs,wherein p-polarized light transmittance of the polarization prism is Tp [%], s-polarized light transmittance of the polarization prism is Ts [%], p-polarized light reflectance of the polarization prism is Rp [%]and s-polarized light reflectance of the polarization prism is Rs [%].

摘要翻译： 光拾取器包括：用于发射p偏振光的激光二极管，所述激光二极管具有通过检测其前面的发射光的功率来控制p偏振光的输出功率的单元; 用于接收激光并输出与​​所接收的激光量相对应的信号的光电检测器; 偏振棱镜，用于通过在其上施加热量将发射的光透射和引导到记录有信息的光盘，并且用于将由光盘反射的光的至少一部分反射和引导到光电检测器。 光拾取器基本上满足以下条件：60 [％]

公开(公告)号：US07305085B2

公开(公告)日：2007-12-04

申请号：US09893785

申请日：2001-06-29

申请人： Kenji Ohkuma ,  Fumihiko Sano ,  Hirofumi Muratani ,  Shinichi Kawamura

发明人： Kenji Ohkuma ,  Fumihiko Sano ,  Hirofumi Muratani ,  Shinichi Kawamura

IPC分类号： H04L9/28 ,  H04L9/06 ,  H04K1/00

CPC分类号： H04L9/002 ,  H04L9/0631 ,  H04L2209/08 ,  H04L2209/12 ,  H04L2209/24

摘要： In each stage, multiple parallel nonlinear transformation modules each perform local lower-level diffusion, then a diffusion module performs higher-level diffusion over the block width and multiple parallel nonlinear transformation modules each perform local lower-level diffusion. This operation is repeated a predetermined number of times corresponding to the number of stages. Each nonlinear transformation module is formed into the nested SPN structure by arranging alternately nonlinear transformation modules and a diffusion module. The diffusion module performs linear transformation for spreading the state of at least one bit in input data to the preceding nonlinear transformation modules to at least one bit in input data to the succeeding nonlinear transformation modules.

摘要翻译： 在每个阶段，多个并行非线性变换模块各自执行局部较低级别的扩散，然后扩散模块在块宽度上执行更高级别的扩散，并且多个并行非线性变换模块各自执行局部较低级别的扩散。 该操作重复与阶段数相对应的预定次数。 每个非线性变换模块通过交替排列非线性变换模块和扩散模块形成嵌套SPN结构。 扩散模块执行线性变换，以将输入数据中的至少一位的状态扩展到先前的非线性变换模块，以将输入数据中的至少一位扩展到随后的非线性变换模块。