公开(公告)号：US20060158993A1

公开(公告)日：2006-07-20

申请号：US11386126

申请日：2006-03-22

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

公开(公告)号：US07075878B2

公开(公告)日：2006-07-11

申请号：US10894888

申请日：2004-07-20

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

公开(公告)号：US07027378B2

公开(公告)日：2006-04-11

申请号：US10894907

申请日：2004-07-20

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

公开(公告)号：US20060028927A1

公开(公告)日：2006-02-09

申请号：US11238272

申请日：2005-09-29

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

摘要翻译： 本发明提供了一种光学元件，通过该光学元件可以配置光学头，其中当物镜移动时，校正效果几乎没有劣化，以及使用这种光学元件的光学头和光学记录/再现装置。 本发明还提出了一种新颖的光学记录/再现装置和光学记录/再现方法。 光学元件包括第一电压施加电极13，与第一电压施加电极13相对布置的第一相对电极17和布置在第一施加电极13和第一相对电极17之间的第一相变层15。 通过改变第一电压施加电极13和第一相对电极17之间的电压，将入射到第一相变层15上的光转换成球面波的相位。

公开(公告)号：USRE38943E1

公开(公告)日：2006-01-24

申请号：US09671674

申请日：2000-09-27

申请人： Yoshiaki Komma ,  Sadao Mizuno ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Sadao Mizuno ,  Seiji Nishino

IPC分类号： G02B5/32 ,  G02B3/10 ,  G02B3/08 ,  G02B7/00 ,  G11B7/12

CPC分类号： G02B5/1895 ,  G02B3/10 ,  G02B5/18 ,  G02B5/1814 ,  G02B5/1842 ,  G02B5/1871 ,  G02B5/1876 ,  G02B5/32 ,  G02B21/025 ,  G02B21/18 ,  G02B21/20 ,  G02B27/4238 ,  G03F9/70 ,  G03F9/7049 ,  G03F9/7069 ,  G03F9/7088 ,  G11B7/08511 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B19/12 ,  G11B19/127 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the incident light to form a beam of first-order diffracted light, and an objective lens for converging the transmitted light to form a first converging spot on a front surface of a thin type of first information medium and converging the diffracted light to form a second converging spot on a front surface of a thick type of second information medium. Because the hologram selectively functions as a concave lens for the diffracted light, a curvature of the transmitted light differs from that of the diffracted light. Therefore, even though the first and second information mediums have different thicknesses, the transmitted light incident on rear surface of the first information medium is converged on the its front surface, and the diffracted light incident on a rear surface of the second information medium is converged on the its front surface. That is, the compound objective lens has two focal points.

摘要翻译： 复合物镜由全息透镜构成或透射入射光的一部分而没有任何衍射形成透射光束，衍射入射光的剩余部分以形成一级衍射光束，目标 透镜，用于会聚透射光以在薄型第一信息介质的前表面上形成第一会聚点，并且会聚衍射光以在厚型第二信息介质的前表面上形成第二会聚点。 由于全息图有选择地用作衍射光的凹透镜，透射光的曲率与衍射光的曲率不同。 因此，即使第一信息介质和第二信息介质具有不同的厚度，入射在第一信息介质的后表面上的透射光会聚在其前表面上，并且入射在第二信息介质的后表面上的衍射光会聚 在其前面。 也就是说，复合物镜具有两个焦点。

公开(公告)号：US06400671B2

公开(公告)日：2002-06-04

申请号：US09897811

申请日：2001-07-02

申请人： Hideki Hayashi ,  Tatsuo Ito ,  Yoshiaki Komma ,  Hiroaki Yamamoto ,  Seiji Nishino

发明人： Hideki Hayashi ,  Tatsuo Ito ,  Yoshiaki Komma ,  Hiroaki Yamamoto ,  Seiji Nishino

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0912 ,  G11B7/0943 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0006

摘要： In a photodetector, the minimum size of the photodetection area for detecting a focus error signal from a light beam on the inner radius side of a hologram is made smaller than the minimum diameter of diffracted light beam spots (30, 31) for recording and reproduction, and when a CD is reproduced, a light beam close to the optical axis is made to significantly contribute to the focus error signal and the minimum size of the photodetection area for detecting the focus error signal from a light beam from the peripheral side of the hologram is made larger than the minimum diameter of diffracted light beam spots (130, 131) for recording and reproduction, whereby the focus error signal is made equal to the normal focus error signal when a DVD is reproduced, so that the focus offset variation caused when the base material thickness varies can be reduced.

摘要翻译： 在光电检测器中，将用于检测来自全息图的内半径侧上的光束的聚焦误差信号的光检测区域的最小尺寸设定为小于用于记录和再现的衍射光束点（30,31）的最小直径 ，并且当再现CD时，使靠近光轴的光束显着有助于聚焦误差信号和用于从来自所述光轴的外围侧的光束检测聚焦误差信号的光检测区域的最小尺寸 使全息图大于用于记录和再现的衍射光束点（130,131）的最小直径，由此当再现DVD时使聚焦误差信号等于正常聚焦误差信号，使得聚焦偏移变化引起 当基材厚度变化时可以减少。

公开(公告)号：US5757754A

公开(公告)日：1998-05-26

申请号：US495137

申请日：1995-06-28

申请人： Hiroaki Yamamoto ,  Tetsuo Saimi ,  Seiji Nishino ,  Yoshiaki Komma ,  Hidenori Wada

发明人： Hiroaki Yamamoto ,  Tetsuo Saimi ,  Seiji Nishino ,  Yoshiaki Komma ,  Hidenori Wada

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0901 ,  G11B7/094 ,  G11B7/123 ,  G11B7/0912 ,  G11B7/0916

摘要： A light beam emitted from a semiconductor laser element is collimated by a collimating lens, and is applied to an optical disk through a polarizing holographic beam splitter, a .lambda./4 plate and an objective lens, a light beam reflected by the optical disk is applied to the polarizing holographic beam splitter and is diffracted. Diffracted light beams of +1st order and -1st order are applied to two photodetectors, and a focus error signal is obtained on the basis of the diffracted light beam of +1st order and a tracking error signal is obtained on the basis of the diffracted light beam of -1st order.

摘要翻译： 从半导体激光元件发射的光束被准直透镜准直，并通过偏振全息光束分离器，λ/ 4板和物镜施加到光盘上，施加由光盘反射的光束 到偏振全息分束器并被衍射。 + 1级和-1级的衍射光束被施加到两个光电检测器，并且基于+ 1阶的衍射光束获得聚焦误差信号，并且基于衍射光获得跟踪误差信号 光束为-1阶。

公开(公告)号：US5301182A

公开(公告)日：1994-04-05

申请号：US868939

申请日：1992-04-16

申请人： Yoshiaki Komma ,  Seiji Nishino ,  Yoshikazu Hori

发明人： Yoshiaki Komma ,  Seiji Nishino ,  Yoshikazu Hori

IPC分类号： G11B7/09 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1362 ,  G11B7/1353

摘要： An optical pickup head for operating on an information recording medium includes a light source for emitting a light beam. A transparent base plate has opposite surfaces formed with a semitransparent film and a hologram respectively. The semitransparent film is exposed to the light beam emitted from the light source, and reflects a portion of the light beam emitted from the light source. The portion of the light beam which is reflected by the semitransparent film forms a forward light beam. A condenser optical system serves to focus the forward light beam on the information recording medium. The forward light beam is reflected at the information recording medium, and forms a backward light beam. The backward light beam successively passes through the condenser optical system, the semitransparent film, and the transparent base plate, and then reaches the hologram. The hologram generates a backward +1-order diffraction light beam from the backward light beam. A plurality of photodetectors serve to receive the +1-order diffraction light beam and to convert the received +1-order diffraction light beam into corresponding electric signals respectively.

摘要翻译： 用于在信息记录介质上操作的光学拾取头包括用于发射光束的光源。 透明基板分别具有形成半透明膜和全息图的相对表面。 半透明膜暴露于从光源发射的光束，并且反射从光源发射的光束的一部分。 由半透明膜反射的光束部分形成正向光束。 聚光器光学系统用于将前向光束聚焦在信息记录介质上。 正向光束在信息记录介质上被反射，形成反向光束。 后向光束依次通过聚光系统，半透明膜和透明基板，然后到达全息图。 全息图从后向光束产生反向+ 1级的衍射光束。 多个光电探测器用于接收+ 1级衍射光束并将接收到的+1级衍射光束分别转换为相应的电信号。

公开(公告)号：US5519685A

公开(公告)日：1996-05-21

申请号：US111959

申请日：1993-08-26

申请人： Makoto Kato ,  Hiroaki Yamamoto ,  Seiji Nishino ,  Shin-ichi Kadowaki

发明人： Makoto Kato ,  Hiroaki Yamamoto ,  Seiji Nishino ,  Shin-ichi Kadowaki

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1353 ,  G11B11/10545 ,  G11B7/0903 ,  G11B7/125 ,  G11B7/131 ,  G11B7/1367

摘要： An optical pickup head apparatus comprises a first coherent light source for emitting a coherent light serving as a main beam, and a second coherent light source for emitting a coherent light having a polarized plane at a right angle to the polarized plane of the coherent light emitted from the first coherent light source. When the coherent light emitted from the second coherent light source is incident upon a phase plate, the phase plate yields a sub-beam presenting a distribution of light intensity having peak values at at least both sides of the center of the sub-beam on a plane vertical with respect to the optical axis of the coherent light. Focusing means overlaps the main beam emitted from the first coherent light source on the sub-beam emitted from the phase plate, causing the resulting overlapped beam to be focused on the information-recorded surface of an optical disk. When a focused beam as reflected from the information-recorded surface of the optical disk is incident upon polarized beam separating means, the polarized beam separating means yields the transmitted beam as divided into the main beam and the sub-beam. Optical detecting means individually detects and supplies the light intensities of the main beam and the sub-beam emitted from the polarized beam separating means.

摘要翻译： 光拾取头装置包括用于发射用作主光束的相干光的第一相干光源和用于发射具有与发射的相干光的偏振平面成直角的偏振面的相干光的第二相干光源 从第一个相干光源。 当从第二相干光源发射的相干光入射到相位板上时，相位板产生一个子光束，该子光束呈现在至少在子光束中心两侧的峰值的光强分布， 相对于相干光的光轴垂直。 聚焦装置与从相位板发射的子光束上的从第一相干光源发射的主光束重叠，导致所产生的重叠光束聚焦在光盘的信息记录表面上。 当从光盘的信息记录表面反射的聚焦光束入射到偏振光束分离装置时，偏振光束分离装置产生被分成主光束和子光束的透射光束。 光检测装置分别检测并提供从偏振光束分离装置发射的主光束和子光束的光强度。

公开(公告)号：US08018801B2

公开(公告)日：2011-09-13

申请号：US10563274

申请日：2004-11-01

申请人： Teruhiro Shiono ,  Seiji Nishino ,  Tatsuo Itoh

发明人： Teruhiro Shiono ,  Seiji Nishino ,  Tatsuo Itoh

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  B82Y10/00 ,  G11B7/00452 ,  G11B7/00454 ,  G11B7/00455 ,  G11B7/1275 ,  G11B7/1365 ,  G11B7/24038 ,  G11B7/24085 ,  G11B2007/0013

摘要： An information recording medium of the optical information reproduction device of the present invention includes a recording unit capable of recording information three-dimensionally and provided with a track, and information is recorded by forming a plurality of recording marks along the track of the recording unit by a mark length recording method. When the track direction of the recording marks is assumed to be their longitudinal direction and the direction perpendicular to the track direction is assumed to be their lateral direction, with the present invention, for recording marks located substantially in the same plane, the total area of elongated recording marks, whose longitudinal length is greater than their lateral length, is greater than the total area of recording marks having other than elongated shapes. The optical information reproduction device of the present invention includes a first light source for emitting a reproduction light having a wavelength λ1, an objective lens for focusing the reproduction light on the recording unit, and a first photodetector for detecting a reproduction signal from the reflected light from the recording unit. The focused reproduction light includes as its main component a polarized light component that is polarized perpendicular to the track direction. Also, the recording unit has a track pitch of no more than 1.3 times the wavelength λ1of the reproduction light.

摘要翻译： 本发明的光信息再现装置的信息记录介质包括一个记录单元，它能够三维地记录信息并提供一个轨道，并且通过沿记录单元的轨道形成多个记录标记来记录信息。 标记长度记录方法。 假设记录标记的轨道方向为纵向方向，并且垂直于轨迹方向的方向被认为是其横向方向，根据本发明，对于基本位于同一平面上的记录标记， 其长度大于其横向长度的细长记录标记大于具有不同于细长形状的记录标记的总面积。 本发明的光学信息再现装置包括用于发射具有波长λ1的再现光的第一光源，用于将再现光聚焦在记录单元上的物镜和用于检测来自反射光的再现信号的第一光电检测器 从录音单元。 聚焦再现光包括垂直于轨道方向偏振的偏振光分量作为其主要分量。 此外，记录单元的轨道间距不大于再现光的波长λ1的1.3倍。