公开(公告)号：US06181491B2

公开(公告)日：2001-01-30

申请号：US09366373

申请日：1999-08-03

申请人： Kousei Sano ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Kadowaki

IPC分类号： G02B702

CPC分类号： G11B7/139 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1381

摘要： An optical head device capable of stably positioning an information head device even if a distance between the object point and the image point is reduced so as to miniaturize the device can be realized. The optical head device comprises a semiconductor laser emitting a light beam, a lens converging the light beam emitted from the semiconductor laser to a disk and a holding means maintaining the disk at a constant distance from the lens. The optical head device satisfies the following equations 24 and 25: L2=f×L1/(L1−f)  (equation 24) h

摘要翻译： 即使减少对象点与图像点之间的距离，能够稳定地定位信息头装置的光头装置能够实现装置的小型化。 光头装置包括发射光束的半导体激光器，将从半导体激光器发射的光束会聚到盘上的透镜以及保持光盘与透镜恒定距离的保持装置。 光头装置满足以下等式24和25：其中f表示透镜的焦距，L1表示半导体激光器和位于透镜的半导体激光器侧的第一主点之间的距离，h表示 位于透镜的盘侧的第二主点和由保持装置保持的盘。

公开(公告)号：US5740141A

公开(公告)日：1998-04-14

申请号：US207859

申请日：1994-03-08

申请人： Kousei Sano ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Kadowaki

IPC分类号： G11B7/005 ,  G11B7/14 ,  G11B20/10 ,  G11B7/00

CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B7/14

摘要： A signal processing device used for an apparatus capable of optically reproducing information from a recording medium is disclosed. In the signal processing device, a signal including information recorded at positions adjacent to a prescribed position is multiplied by k. The multiplied signal is subtracted from a signal mainly including information recorded at the prescribed position. In the signal processing device, the coefficient k is adjusted as follows. In one case, the coefficient k is varied depending on the signal strength. In another case, the processed signals are held at appropriate timings and a signal used as an index is obtained from two or more such signals. The coefficient k is optimized based on the index. In yet another case, the coefficient k is periodically varied in a synchronous manner with the fundamental period of the information recorded on the recording medium.

公开(公告)号：US08107346B2

公开(公告)日：2012-01-31

申请号：US11912469

申请日：2006-04-24

申请人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second main region transmitting a second interfering portion; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region. The splitting section further includes a swapping section for swapping a portion of the first sub-light beam with a portion of the second sub-light beam.

摘要翻译： 根据本发明的光学头装置包括用于分离已经从光学存储介质反射的光束的分离部分。 分割部分包括：传送第一干扰部分的第一主区域; 传送第二干扰部分的第二主区域; 第一和第二子区域以比在第一主区域中低的速率传输第一干扰部分，并且第二干扰部分以比在第二主要区域中更低的速率透过。 所述分割部将所述反射光束分割为：透过所述第一主区域的第一主光束; 透过第二​​主区域的第二主光束; 透射通过第一子区域的第一子光束; 和通过第二子区域传输的第二副光束。 分割部还包括用于将第一子光束的一部分与第二子光束的一部分交换的交换部分。

公开(公告)号：USRE43126E1

公开(公告)日：2012-01-24

申请号：US11529689

申请日：2006-09-28

申请人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

发明人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

IPC分类号： G11G7/00

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.

摘要翻译： 光拾取头设置有光源，用于产生多个衍射光束的衍射装置，用于将衍射光束聚焦到光存储介质上的会聚装置，用于将由光学器件反射的多个光束分支的光束分支装置 存储介质，以及光检测装置，用于输出对应于接收光束的光量的信号。 光检测装置具有主光束光接收部分和副光束光接收部分。 当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时，第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量 反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。 本发明提供了一种光拾取头，即使在使用双层盘的情况下在物镜进行跟踪期间，也不会在TE信号中产生偏移。

公开(公告)号：US07539089B2

公开(公告)日：2009-05-26

申请号：US11736763

申请日：2007-04-18

申请人： Yuuichi Kuze ,  Kenji Fujiune ,  Takashi Kishimoto ,  Shin-ichi Yamada ,  Katsuya Watanabe ,  Akihiro Yasuda ,  Shin-ichi Kadowaki ,  Kousei Sano

发明人： Yuuichi Kuze ,  Kenji Fujiune ,  Takashi Kishimoto ,  Shin-ichi Yamada ,  Katsuya Watanabe ,  Akihiro Yasuda ,  Shin-ichi Kadowaki ,  Kousei Sano

IPC分类号： G11B7/00

CPC分类号： G11B7/1378 ,  G11B7/08511 ,  G11B7/0908 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/1369 ,  G11B7/1381 ,  G11B7/13927 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disc device of the present invention includes spherical aberration changing means for changing spherical aberration occurring on a converging position of a light beam converged by a lens, an actuator for moving the spherical aberration changing means in a relatively precise manner, and an actuator for moving the spherical aberration changing means in a relatively rough manner. The optical disc device drives a second actuator and a third actuator based on a signal of spherical aberration detecting means and performs control so that spherical aberration is almost 0. The third actuator moves the spherical aberration changing means based on a direct current component included in a signal of the spherical aberration detecting means, and the second actuator moves the spherical aberration changing means based on an alternating current component included in the signal of the spherical aberration detecting means.

摘要翻译： 本发明的光盘装置包括球面像差改变装置，用于改变在由透镜会聚的光束的会聚位置处产生的球面像差，用于相对精确地移动球面像差改变装置的致动器和用于 以相对粗糙的方式移动球面像差改变装置。 光盘装置基于球面像差检测装置的信号驱动第二致动器和第三致动器，并执行控制，使得球面像差几乎为0.第三致动器基于包括在球面像差检测装置中的直流分量来移动球面像差改变装置 信号，并且第二致动器基于球面像差检测装置的信号中包括的交流分量来移动球面像差改变装置。

公开(公告)号：US06898169B2

公开(公告)日：2005-05-24

申请号：US10235625

申请日：2002-09-04

申请人： Shin-ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

发明人： Shin-ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/0055 ,  G11B7/135

CPC分类号： G11B7/094 ,  G11B7/0055 ,  G11B7/0903 ,  G11B2007/0013

摘要： An optical pickup head device includes a diffraction grating for generating zero-order diffracted light and at least first-order diffracted light and provides a tracking error signal with a DPP method. The diffraction grating includes grating patterns with a nonuniform period or phase. The size of the first-order diffracted light converged on an optical recording medium is larger in the direction parallel to a tangent to the track than in the direction perpendicular to the tangent. P1/P0>PW2/PW1 is established, where PW1 represents the power that is required to record information on the optical recording medium, PW2 represents the maximum power that allows information recorded on the optical recording medium to be reproduced without being erased, P0 represents the light amount of the zero-order diffracted light converged on the optical recording medium, and P1 represents the light amount of the at least first-order diffracted light converged on the optical recording medium. This configuration makes it possible to detect a tracking error signal with reduced offset, even if a recordable optical recording medium having two information recording planes is used.

摘要翻译： 光拾取头装置包括用于产生零级衍射光和至少一级衍射光的衍射光栅，并提供具有DPP方法的跟踪误差信号。 衍射光栅包括具有不均匀周期或相位的光栅图案。 会聚在光学记录介质上的一级衍射光的尺寸在平行于轨道的切线的方向上大于在垂直于切线的方向上的尺寸。 P 1 / P 0> PW 2 / PW 1，其中PW 1表示在光学记录介质上记录信息所需的功率，PW 2表示允许记录在光学记录介质上的信息被再现的最大功率 不被擦除，P 0表示会聚在光记录介质上的零级衍射光的光量，P 1表示会聚在光记录介质上的至少一级衍射光的光量。 该配置使得即使使用具有两个信息记录平面的可记录光学记录介质，也可以检测具有减小的偏移的跟踪误差信号。

公开(公告)号：US06798723B2

公开(公告)日：2004-09-28

申请号：US10163443

申请日：2002-06-04

申请人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

发明人： Hideki Hayashi ,  Sadao Mizuno ,  Daisuke Ogata ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Jouji Anzai ,  Akihiro Yasuda

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.

摘要翻译： 光拾取头设置有光源，用于产生多个衍射光束的衍射装置，用于将衍射光束聚焦到光存储介质上的会聚装置，用于将由光学器件反射的多个光束分支的光束分支装置 存储介质，以及光检测装置，用于输出对应于接收光束的光量的信号。 光检测装置具有主光束光接收部分和副光束光接收部分。 当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时，第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量 反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。 本发明提供了一种光拾取头，即使在使用双层盘的情况下在物镜进行跟踪期间，也不会在TE信号中产生偏移。

公开(公告)号：US06661769B2

公开(公告)日：2003-12-09

申请号：US09964725

申请日：2001-09-28

申请人： Shin-ichi Kadowaki ,  Kousei Sano ,  Hiromichi Ishibashi ,  Shigeru Furumiya

发明人： Shin-ichi Kadowaki ,  Kousei Sano ,  Hiromichi Ishibashi ,  Shigeru Furumiya

IPC分类号： G11B700

CPC分类号： G11B7/0956 ,  G11B7/007 ,  G11B7/0938

摘要： Tilt of an optical storage medium is stably detected even when then the guide groove pitch is reduced and recording capacity is increased. On a disk with continuous grooves of a pitch Gp, part of tracks Gn−1 and Gn+1 adjacent to opposite sides of an n-th track Gn is eliminated, forming an area where the groove pitch is equivalent to 2·Gp. A push-pull signal from the area of groove pitch Gp and a push-pull signal from the area of groove pitch 2·Gp are differentiated to obtain a tilt error signal. Tilt can therefore be detected even when groove pitch Gp is reduced and storage capacity is increased, and a highly reliable data recording and reproducing apparatus can be provided at low cost.

公开(公告)号：US08483031B2

公开(公告)日：2013-07-09

申请号：US13391115

申请日：2011-06-16

申请人： Yoshiaki Komma ,  Kousei Sano

发明人： Yoshiaki Komma ,  Kousei Sano

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical head device includes a light blocking region disposed on a light flux of a reflected light beam resulting from reflection by a recording layer on which a blue light beam is focused, and blocks, when there are at least two recording layers on a blue light beam incident side of the recording layer on which the blue light beam is focused or on a side thereof opposite to the blue light beam incident side, reflected light beams resulting from reflection by the at least two recording layers which are incident on a region in a photodetector where the reflected light beams resulting from the reflection by the at least two recording layers interfere with each other. The light blocking region is not formed on an optical axis of the reflected light beam resulting from the reflection by the recording layer on which the blue light beam is focused.

摘要翻译： 一种光头装置，包括一个遮光区域，其设置在由蓝色光束聚焦的记录层的反射产生的反射光束的光束上，并且当在蓝色光线上存在至少两个记录层时， 在蓝色光束聚焦的记录层的光束入射侧或与蓝色光束入射侧相反的一侧的光束入射侧，由入射到蓝色光束入射侧的区域的至少两个记录层的反射产生的反射光束 其中由至少两个记录层的反射产生的反射光束彼此干涉的光电检测器。 遮光区域不形成在被蓝色光束聚焦的记录层的反射所产生的反射光束的光轴上。

公开(公告)号：US08427928B2

公开(公告)日：2013-04-23

申请号：US12933899

申请日：2010-01-26

申请人： Hideki Nakata ,  Kousei Sano ,  Takashi Haruguchi ,  Osamu Kajino

发明人： Hideki Nakata ,  Kousei Sano ,  Takashi Haruguchi ,  Osamu Kajino

IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B20/18

CPC分类号： G11B7/0909 ,  G11B7/131 ,  G11B7/1378 ,  G11B7/22 ,  G11B2007/0013

摘要： An optical head 200 comprises: a light source 101 that emits a light beam; an objective lens 105 that condenses, in the form of converging light, the light beam emitted by the light source 101, onto an information recording medium; a cylindrical lens 115 onto which a reflected light beam that is reflected by the information recording medium is incident, and which generates astigmatism for forming a focus error signal; a light detector 120 that receives the reflected light beam passing through the cylindrical lens 115; and a holder 130 that holds the cylindrical lens 115 and the light detector 120. The holder 130 has a first main face and a second main face that extend in directions that intersect the optical axis of the reflected light beam. The cylindrical lens 115 is bonded to the first main face and the light detector 120 is bonded to the second main face.

摘要翻译： 光头200包括：发射光束的光源101; 以会聚光的形式将由光源101发射的光束会聚到信息记录介质上的物镜105; 由信息记录介质反射的反射光束入射到其上的柱面透镜115，并产生用于形成聚焦误差信号的像散; 接收通过柱面透镜115的反射光束的光检测器120; 以及保持柱面透镜115和光检测器120的保持器130.保持器130具有在与反射光束的光轴相交的方向上延伸的第一主面和第二主面。 柱面透镜115与第一主面接合，光检测器120与第二主面接合。