公开(公告)号：US07872952B2

公开(公告)日：2011-01-18

申请号：US11576482

申请日：2005-09-20

申请人： Akira Kurozuka ,  Shin-ichi Kadowaki ,  Joji Anzai ,  Osamu Kajino

发明人： Akira Kurozuka ,  Shin-ichi Kadowaki ,  Joji Anzai ,  Osamu Kajino

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1275 ,  G11B7/08511 ,  G11B7/1362 ,  G11B7/13925 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical disk apparatus according to the present invention includes: a light emission section for emitting laser light; an optical system for irradiating the optical disk medium with the laser light; and an aberration control section for controlling aberration of the laser light. In one embodiment, the aberration control section repeatedly switches between a plurality of aberration setting states in a focus lock-in operation. In another embodiment, the aberration control section simultaneously sets a plurality of aberration setting states in a focus lock-in operation. As a result, a plurality of aberration setting states can be allowed to substantially coexist within a single optical system.

摘要翻译： 根据本发明的光盘装置包括：发光部分，用于发射激光; 用于用激光照射光盘介质的光学系统; 以及用于控制激光的像差的像差控制部。 在一个实施例中，像差控制部分在聚焦锁定操作中在多个像差设置状态之间重复地切换。 在另一实施例中，像差控制部分在聚焦锁定操作中同时设置多个像差设置状态。 结果，可以允许多个像差设定状态在单个光学系统内基本共存。

公开(公告)号：US20100254236A1

公开(公告)日：2010-10-07

申请号：US12602718

申请日：2008-05-29

申请人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

发明人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B20/10 ,  G11B7/135

CPC分类号： G11B7/13925 ,  G11B7/1376 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens 4 corrects a third-order spherical aberration which is generated depending on the thickness of a light transmissive layer from a surface of a first optical information recording medium 30, corresponding to an optimal substrate thickness of a first objective lens 6, to an intended information recording surface, assuming that the light transmissive layer thickness of the first optical information recording medium 30 which minimizes a residual third-order spherical aberration at the time of incidence of parallel light into the first objective lens 6 is defined as the optimal substrate thickness of the first objective lens 6. The optimal substrate thickness of the first objective lens 6 is defined in such a manner that a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 farthest from the first objective lens 6 at the time of correcting the third-order spherical aberration, and a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 closest to the first objective lens 6 at the time of correcting the third-order spherical aberration are set equal to each other.

摘要翻译： 本发明的目的是抑制在校正三次球面像差时产生的波前像差的影响，并且实现满意的信息记录和/或再现。 准直透镜4将与第一光学信息记录介质30的表面相对应的透光层的厚度相应于第一物镜6的最佳基板厚度的三次球面像差校正为 假设将平行光入射到第一物镜6中的残余三阶球面像差最小化的第一光学信息记录介质30的透光层厚度定义为最佳基板厚度 第一物镜6的最佳基板厚度被定义为使得在第一光信息记录介质30的信息记录表面上产生的波前像差的变化最远离第一物镜6的第一物镜6。 在校正三次球面像差时的物镜6，以及a 在校正三次球面像差时在最靠近第一物镜6的第一光学信息记录介质30的信息记录表面上产生的波前像差的变化被设置为彼此相等。

公开(公告)号：US20090303864A1

公开(公告)日：2009-12-10

申请号：US12375648

申请日：2007-07-27

申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh

发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B7/26

CPC分类号： G11B7/24038

摘要： An optical recording medium is provided with a plurality of recording layers, wherein the recording layers are formed such that all the spacings between two recording layers in all the combinations selected from the plurality of recording layers do not coincide with each other. Accordingly, the return of lights reflected by other layers to an optical head along the same optical path as reflected light from a readout layer during the reproduction can be avoided. Therefore, an optical recording medium, from which a good reproduction signal can be obtained, can be provided by suppressing the deterioration of a servo signal and a reproduction signal of a reproducing device due to a variation of interference fringes on a light receiving element.

摘要翻译： 光记录介质设置有多个记录层，其中记录层形成为使得从多个记录层中选出的所有组合中的两个记录层之间的所有间距彼此不一致。 因此，可以避免在再现期间将来自其它层反射的光沿与读出层反射的光沿相同的光路返回。 因此，可以通过抑制由于光接收元件上的干涉条纹的变化而导致的再现装置的伺服信号的劣化和再现信号的劣化来提供从其获得良好再现信号的光记录介质。

公开(公告)号：USRE40895E1

公开(公告)日：2009-09-01

申请号：US11705086

申请日：2007-02-12

申请人： Hideki Hayashi ,  Joji Anzai

发明人： Hideki Hayashi ,  Joji Anzai

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/00718 ,  G11B7/0903 ,  G11B7/0906 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

摘要： In a optical head, a beam is emitted from a light emitting element in which a plurality of light sources are integrally formed, the light sources being able to emit beams having different wave lengths from one another. An optical system converges the beam coming from any one of the light sources onto an optical information storage medium. An optical separator separates a reflected beam coming from the optical information storage medium from the beam coming from the light source. A light receiving element detects light quantities of the reflected beam separated by the optical separator.

摘要翻译： 在光头中，从其中多个光源整体形成的发光元件发射光束，光源能够发射彼此具有不同波长的光束。 光学系统将来自任何一个光源的光束会聚到光学信息存储介质上。 光学分离器将来自光学信息存储介质的反射光束与来自光源的光束分离。 光接收元件检测由光学分离器分离的反射光束的光量。

公开(公告)号：US20090135687A1

公开(公告)日：2009-05-28

申请号：US12279061

申请日：2007-02-13

申请人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

发明人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as not to include light spots formed by luminous fluxes of reflected light from the optical information recording medium layers other than the optical information recording medium layer targeted for recording or playback.

摘要翻译： 光头包括从光盘的反射光的光束提取不包括光束的光轴的至少第一光束分支​​的全息图; 以及光接收器，其接收来自光盘的反射光并产生信号输出，其中光电检测器具有光接收区域，其接收来自用于记录或回放的光信息记录介质层的反射光的第一光束分支 光盘的多个光信息记录介质层，光接收区域被放置成使得由来自光信息记录介质层的反射光的由第一光束分支​​形成的光斑产生的信号输出 在第一和第二光检测区域之间进行记录或重放的目标是相同的，并且光接收区域的边界线位于不包括由来自光信息的反射光的光束形成的光点 记录介质层以外的光信息记录介质层 录音或播放。

公开(公告)号：US20080084797A1

公开(公告)日：2008-04-10

申请号：US11905923

申请日：2007-10-05

申请人： Kousei Sano ,  Takayuki Nagata ,  Hideki Aikoh ,  Joji Anzai ,  Fumitomo Yamasaki

发明人： Kousei Sano ,  Takayuki Nagata ,  Hideki Aikoh ,  Joji Anzai ,  Fumitomo Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

摘要： The present invention aims to generate an offset-free tracking signal and to realize a stable tracking control even if an optical disc is a multi-layer disc having three or more layers.Light receiving portions of a main region light receiving portion group is arranged between a projection line of a third dividing line on a photodetector and a projection line of a fourth dividing line on the photodetector by stray lights from information layers adjacent to the one, on which a light beam is focused, out of a plurality of information layers. Further, light receiving portions of a subregion light receiving portion group is arranged between a projection line of a first dividing line on a photodetector and a projection line of a second dividing line on the photodetector by the stray lights from the information layers adjacent to the one, on which a light beam is focused, out of the plurality of information layers.

摘要翻译： 本发明的目标是产生无偏移跟踪信号，并且即使光盘是具有三层或更多层的多层盘也能实现稳定的跟踪控制。 主区域光接收部分组的光接收部分布置在光电检测器上的第三分割线的投影线和光电检测器上的第四分割线的投影线之间，与来自与其相邻的信息层的杂散光 在多个信息层中聚焦光束。 此外，子区域光接收部分组的光接收部分被布置在光电检测器上的第一分割线的投影线和光电检测器上的第二分割线的投影线之间， 在多个信息层中聚焦光束。

公开(公告)号：US20070189130A1

公开(公告)日：2007-08-16

申请号：US10592641

申请日：2005-08-24

申请人： Joji Anzai ,  Shin-ichi Kadowaki ,  Fumitomo Yamasaki ,  Eishin Mori

发明人： Joji Anzai ,  Shin-ichi Kadowaki ,  Fumitomo Yamasaki ,  Eishin Mori

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

摘要： Stable tracking control is achieved for an optical recording medium having a plurality of information recording planes. To achieve this, an optical information device comprises a light source for emitting a light beam, a focusing unit for converging the light beam emitted from the light source onto a predetermined information recording plane of an optical recording medium having a plurality of information recording planes, a beam splitting unit for splitting the light beam reflected by the optical recording medium, and a light detection unit having a light receiver that receives the light beam split by the beam splitting unit, for outputting a signal corresponding to the light intensity of the light beams received by the light receiver. A guide groove is formed on at least one of the information recording planes, and the light receiver is entirely disposed within in a map formed on the light detection unit by the light beam reflected by an information recording plane other than the predetermined information recording plane.

摘要翻译： 对于具有多个信息记录平面的光记录介质，实现了稳定的跟踪控制。 为了实现这一点，光信息装置包括用于发射光束的光源，用于将从光源发射的光束会聚到具有多个信息记录面的光记录介质的预定信息记录面上的聚焦单元， 用于分离由光记录介质反射的光束的光束分离单元和具有接收由分束单元分离的光束的光接收器的光检测单元，用于输出对应于光束的光强度的信号 由光接收器接收。 引导槽形成在至少一个信息记录面上，并且光接收器被除了预定信息记录面之外的信息记录面所反射的光束完全设置在形成在光检测单元上的映射中。

公开(公告)号：US08526286B2

公开(公告)日：2013-09-03

申请号：US13316085

申请日：2011-12-09

申请人： Seong-su Park ,  Joji Anzai ,  Yong-han Yoon ,  Jong-uk Kim ,  Ichiro Morishita

发明人： Seong-su Park ,  Joji Anzai ,  Yong-han Yoon ,  Jong-uk Kim ,  Ichiro Morishita

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1353

摘要： An optical pick-up apparatus for reproducing information recorded on an optical recording medium or recording information on the optical recording medium is provided. The optical pick-up apparatus includes a light source unit which generates beams; a diffraction element which diffracts the generated beams; and an objective lens which focuses a p order diffracted beam which is used for recording and reproducing information among a plurality of diffracted beams which are diffracted by the diffraction element on any one of a plurality of information layers which are formed on an optical recording medium. A p±1 order diffracted beam which is not used for recording and reproducing information is focused away from the plurality of information recording layers and on the surface of the optical recording medium.

摘要翻译： 提供了一种用于再现记录在光学记录介质上的信息或在光学记录介质上记录信息的光学拾取装置。 光学拾取装置包括产生光束的光源单元; 衍射元件衍射生成的光束; 以及物镜，其将用于在通过衍射元件衍射的多个衍射光束中记录和再现信息的p阶衍射光束聚焦在形成在光学记录介质上的多个信息层中的任一个上。 不用于记录和再现信息的p±1级衍射光束从多个信息记录层和光记录介质的表面上聚焦。

公开(公告)号：US07965612B2

公开(公告)日：2011-06-21

申请号：US12641734

申请日：2009-12-18

申请人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

发明人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B7/20

CPC分类号： G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.

摘要翻译： 即使将其用于包含多个信息记录层的光学信息记录介质，也被抑制得越来越大。 在该光学头中，准直透镜由设置在光源侧的凹透镜和设置在物镜侧的凸透镜形成。 准直透镜致动器沿着光传输层的厚度直到光信息记录介质的信息记录层产生的球面像差被消除的方向移动凸透镜。 在准直透镜相对于物镜的一侧设置孔径光阑，孔径光阑位于物镜侧的凸透镜的焦点附近。

公开(公告)号：US20100091636A1

公开(公告)日：2010-04-15

申请号：US12641734

申请日：2009-12-18

申请人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

发明人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.

摘要翻译： 即使将其用于包含多个信息记录层的光学信息记录介质，也被抑制得越来越大。 在该光学头中，准直透镜由设置在光源侧的凹透镜和设置在物镜侧的凸透镜形成。 准直透镜致动器沿着光传输层的厚度直到光信息记录介质的信息记录层产生的球面像差被消除的方向移动凸透镜。 在准直透镜相对于物镜的一侧设置孔径光阑，孔径光阑位于物镜侧的凸透镜的焦点附近。