公开(公告)号：US07184384B2

公开(公告)日：2007-02-27

申请号：US10512188

申请日：2003-04-18

申请人： Tetsuo Ueyama ,  Keiji Sakai ,  Renzaburou Miki ,  Osamu Miyazaki ,  Yukio Watanabe

发明人： Tetsuo Ueyama ,  Keiji Sakai ,  Renzaburou Miki ,  Osamu Miyazaki ,  Yukio Watanabe

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0956

摘要： An optical pickup converts a laser beam from a semiconductor laser (1) into a parallel ray with a collimator lens (2), and divides it into a main beam (30), a sub-beam (+1st order component) (31), and a sub-beam (−1st order component) (32) with a gradient multiple-division type phase difference grating (3). After passing through a beam splitter (4), an objective lens (5) condenses the light beams on a track (61) of an optical disc (6), and the reflected light that has passed through the objective lens 5 is reflected at the beam splitter (4) and is guided into optical detectors (8A, 8B, and 8C) by a condensing lens (7). Accordingly, in a tracking error signal detecting method using the push-pull signals of the main beam and sub-beams, an offset produced by an objective lens shift or a disc tilt can be cancelled at low cost without lowering the efficiency of using light.

摘要翻译： 光学拾取器将来自半导体激光器（1）的激光束用准直透镜（2）转换成平行光线，并将其分割成主光束（30），子光束（+ 1次分量）（31） ，和具有梯度多分割型相位差光栅（3）的子光束（-1阶分量）（32）。 在通过分束器（4）之后，物镜（5）将光束会聚在光盘（6）的轨道（61）上，并且已经通过物镜5的反射光在 分束器（4），并通过聚光透镜（7）被引导到光学检测器（8A，8B和8C）中。 因此，在使用主光束和子光束的推挽信号的跟踪误差信号检测方法中，可以以低成本消除由物镜偏移或盘倾斜产生的偏移而不降低使用光的效率。

公开(公告)号：US20050180293A1

公开(公告)日：2005-08-18

申请号：US10512188

申请日：2003-04-18

申请人： Tetsuo Ueyama ,  Keiji Sakai ,  Renzaburou Miki ,  Osamu Miyazaki ,  Yukio Watanabe

发明人： Tetsuo Ueyama ,  Keiji Sakai ,  Renzaburou Miki ,  Osamu Miyazaki ,  Yukio Watanabe

IPC分类号： G11B7/1353 ,  G11B7/09 ,  G11B7/095 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0956

摘要： An optical pickup converts a laser beam from a semiconductor laser (1) into a parallel ray with a collimator lens (2), and divides it into a main beam (30), a sub-beam (+1st order component) (31), and a sub-beam (−1st order component) (32) with a gradient multiple-division type phase difference grating (3). After passing through a beam splitter (4), an objective lens (5) condenses the light beams on a track (61) of an optical disc (6), and the reflected light that has passed through the objective lens 5 is reflected at the beam splitter (4) and is guided into optical detectors (8A, 8B, and 8C) by a condensing lens (7). Accordingly, in a tracking error signal detecting method using the push-pull signals of the main beam and sub-beams, an offset produced by an objective lens shift or a disc tilt can be cancelled at low cost without lowering the efficiency of using light.

摘要翻译： 光学拾取器将来自半导体激光器（1）的激光束用准直透镜（2）转换成平行光线，并将其分割成主光束（30），子光束（+ 1次分量）（31） ，和具有梯度多分割型相位差光栅（3）的子光束（-1阶分量）（32）。 在通过分束器（4）之后，物镜（5）将光束会聚在光盘（6）的轨道（61）上，并且已经通过物镜5的反射光在 分束器（4），并通过聚光透镜（7）被引导到光学检测器（8A，8B和8C）中。 因此，在使用主光束和子光束的推挽信号的跟踪误差信号检测方法中，可以以低成本消除由物镜偏移或盘倾斜产生的偏移而不降低使用光的效率。

公开(公告)号：US07315502B2

公开(公告)日：2008-01-01

申请号：US10478263

申请日：2002-11-05

申请人： Keiji Sakai ,  Takahiro Miyake ,  Tetsuo Ueyama ,  Renzaburo Miki ,  Hiroshige Makioka ,  Noboru Fujita ,  Osamu Miyazaki

发明人： Keiji Sakai ,  Takahiro Miyake ,  Tetsuo Ueyama ,  Renzaburo Miki ,  Hiroshige Makioka ,  Noboru Fujita ,  Osamu Miyazaki

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0901 ,  G11B7/094 ,  G11B7/123 ,  G11B7/131

摘要： An object of the present invention is to attain stable tracking servo performance by suppressing an offset caused by a shift of an object lens or a tilt of a disk, despite the one-beam method which does not cause reduction in light quantity of the main beam. A diffraction grating is provided between a hologram and a light receiving section, and a diffraction efficiency of the diffraction grating is varied in a grating longitudinal direction. For example, if an incident light beam on the diffraction grating is shifted in the grating longitudinal direction, the quantity of received light in each light receiving section varies to cause offset. By performing tracking servo so as to cancel the change, it is possible to correct the offset, thereby attaining stable tracking servo performance.

摘要翻译： 本发明的目的是通过抑制由于物镜的偏移引起的偏移或盘的倾斜而获得稳定的跟踪伺服性能，尽管不会导致主光束的光量的减小的单光束方法 。 在全息图和光接收部之间设置衍射光栅，衍射光栅的衍射效率在光栅长度方向上变化。 例如，如果衍射光栅上的入射光束在光栅长度方向上移动，则每个光接收部分中的接收光量变化，导致偏移。 通过执行跟踪伺服以消除变化，可以校正偏移，从而获得稳定的跟踪伺服性能。

公开(公告)号：US07684306B2

公开(公告)日：2010-03-23

申请号：US11496814

申请日：2006-07-31

申请人： Kazunori Matsubara ,  Shinzoh Murakami ,  Tetsuo Ueyama ,  Kazuhiro Tsuchida ,  Yukio Watanabe ,  Osamu Miyazaki

发明人： Kazunori Matsubara ,  Shinzoh Murakami ,  Tetsuo Ueyama ,  Kazuhiro Tsuchida ,  Yukio Watanabe ,  Osamu Miyazaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1353

摘要： There is provided an optical pickup apparatus that can obtain a stable servo signal by reducing stray light generated by diffraction in a recording layer other than a recording layer on which light is condensed. A hologram element provided in an optical pickup apparatus for recording information onto a recording medium and/or reproducing information on the recording medium by use of light includes fourth and fifth divisions where at least first-order diffracted light among diffracted light beams obtained by reflection and diffraction on a recording layer other than a light-condensed recording layer on which light is condensed by an objective lens so as not to be directed toward first and second light-receiving elements for detecting focus position information and third to eighth light-receiving elements for detecting track position information.

摘要翻译： 提供了一种光拾取装置，其可以通过减少除了聚光的记录层之外的记录层中的衍射产生的杂散光，从而获得稳定的伺服信号。 提供在用于通过使用光将信息记录在记录介质上和/或在记录介质上再现信息的光学拾取装置中的全息元件包括第四和第五分割，其中至少一级衍射光通过反射和 除了聚光记录层之外的记录层上的衍射，其中光被物镜聚光，以便不被指向用于检测聚焦位置信息的第一和第二光接收元件和用于检测聚焦位置信息的第三至第八光接收元件 检测轨迹位置信息。

公开(公告)号：US20070053270A1

公开(公告)日：2007-03-08

申请号：US11495907

申请日：2006-07-28

申请人： Tetsuo Ueyama ,  Osamu Miyazaki ,  Yukio Watanabe ,  Yasuo Nakata ,  Tomio Mashiyama

发明人： Tetsuo Ueyama ,  Osamu Miyazaki ,  Yukio Watanabe ,  Yasuo Nakata ,  Tomio Mashiyama

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0903

摘要： An optical pickup device has a semiconductor laser emitting light which is in turn branched via a diffraction grating into at least three beams of light including a main beam and two sub beams which are in turn condensed via an objective lens on an optical disk at a guide groove and reflected by the optical disk to provide three reflections of light which are in turn received by detectors, each divided into two regions, respectively, to generate a tracking error signal. The diffraction grating is divided into three regions including a first region, a second region and a third region located intermediate therebetween, each having a periodical structure out of phase, the periodical structure having grating grooves in a direction determined depending on the phase of the second region to incline relative to a direction perpendicular to the guide groove of the optical disk.

摘要翻译： 光学拾取装置具有发射光的半导体激光器，该半导体激光器又通过衍射光栅分支成至少三束光束，所述至少三束光包括主光束和两个子光束，所述至少三个光束又通过物镜在光盘上以引导 凹槽并由光盘反射以提供三次反射的光，这些反射又被检测器接收，每个被分成两个区域以产生跟踪误差信号。 衍射光栅分为三个区域，包括第一区域，第二区域和位于其间的第三区域，每个区域具有异相的周期性结构，该周期结构具有根据第二区域的相位确定的方向的光栅槽 区域相对于垂直于光盘的引导槽的方向倾斜。

公开(公告)号：US20070025228A1

公开(公告)日：2007-02-01

申请号：US11496814

申请日：2006-07-31

申请人： Kazunori Matsubara ,  Shinzoh Murakami ,  Tetsuo Ueyama ,  Kazuhiro Tsuchida ,  Yukio Watanabe ,  Osamu Miyazaki

发明人： Kazunori Matsubara ,  Shinzoh Murakami ,  Tetsuo Ueyama ,  Kazuhiro Tsuchida ,  Yukio Watanabe ,  Osamu Miyazaki

IPC分类号： G11B7/135

CPC分类号： G11B7/1353

摘要： There is provided an optical pickup apparatus that can obtain a stable servo signal by reducing stray light generated by diffraction in a recording layer other than a recording layer on which light is condensed. A hologram element provided in an optical pickup apparatus for recording information onto a recording medium and/or reproducing information on the recording medium by use of light includes fourth and fifth divisions where at least first-order diffracted light among diffracted light beams obtained by reflection and diffraction on a recording layer other than a light-condensed recording layer on which light is condensed by an objective lens so as not to be directed toward first and second light-receiving elements for detecting focus position information and third to eighth light-receiving elements for detecting track position information.

摘要翻译： 提供了一种光拾取装置，其可以通过减少除了聚光的记录层之外的记录层中的衍射产生的杂散光，从而获得稳定的伺服信号。 提供在用于通过使用光将信息记录在记录介质上和/或在记录介质上再现信息的光学拾取装置中的全息元件包括第四和第五分割，其中至少一级衍射光通过反射和 除了聚光记录层之外的记录层上的衍射，其中光被物镜聚光，以便不被指向用于检测聚焦位置信息的第一和第二光接收元件和用于检测聚焦位置信息的第三至第八光接收元件 检测轨迹位置信息。

公开(公告)号：US07573801B2

公开(公告)日：2009-08-11

申请号：US11511743

申请日：2006-08-28

申请人： Yukio Watanabe ,  Tetsuo Ueyama ,  Osamu Miyazaki ,  Kazunori Matsubara ,  Shinzoh Murakami ,  Kazuhiro Tsuchida

发明人： Yukio Watanabe ,  Tetsuo Ueyama ,  Osamu Miyazaki ,  Kazunori Matsubara ,  Shinzoh Murakami ,  Kazuhiro Tsuchida

IPC分类号： G11B7/00

CPC分类号： G11B7/0903 ,  G11B7/0916 ,  G11B7/1353

摘要： An optical pickup includes a hologram element. The hologram element is provided with a hologram pattern including a splitting section for focus which splits light used for the detection of an FES and a splitting section for tracking which splits light used for the detection of a TES. The splitting section for tracking is formed in a region excluding a region interposed between a first virtual straight line and a second virtual straight line. The first virtual straight line is drawn on the hologram element in parallel to an X direction and passes through an optical axis of reflected light entering the hologram element in a state where the objective lens is in a neutral position, and the second virtual straight line is drawn in parallel to the first virtual straight line, while being spaced at a distance d from the first virtual straight line.

摘要翻译： 光拾取器包括全息元件。 全息元件设置有包括用于聚焦的分割部分的全息图图案，其分割用于检测FES的光和用于跟踪用于检测TES的分离光的分割部分。 用于跟踪的分割部分形成在除了插入在第一虚拟直线和第二虚拟直线之间的区域的区域中。 第一虚拟直线在全息元件上平行于X方向绘制，并且在物镜处于中立位置的状态下穿过进入全息元件的反射光的光轴，第二虚拟直线为 平行于第一虚拟直线绘制，同时与第一虚拟直线间隔开距离d。

公开(公告)号：US20070053272A1

公开(公告)日：2007-03-08

申请号：US11511743

申请日：2006-08-28

申请人： Yukio Watanabe ,  Tetsuo Ueyama ,  Osamu Miyazaki ,  Kazunori Matsubara ,  Shinzoh Murakami ,  Kazuhiro Tsuchida

发明人： Yukio Watanabe ,  Tetsuo Ueyama ,  Osamu Miyazaki ,  Kazunori Matsubara ,  Shinzoh Murakami ,  Kazuhiro Tsuchida

IPC分类号： G11B7/135

CPC分类号： G11B7/0903 ,  G11B7/0916 ,  G11B7/1353

摘要： An optical pickup includes a hologram element. The hologram element is provided with a hologram pattern including a splitting section for focus which splits light used for the detection of an FES and a splitting section for tracking which splits light used for the detection of a TES. The splitting section for tracking is formed in a region excluding a region interposed between a first virtual straight line and a second virtual straight line. The first virtual straight line is drawn on the hologram element in parallel to an X direction and passes through an optical axis of reflected light entering the hologram element in a state where the objective lens is in a neutral position, and the second virtual straight line is drawn in parallel to the first virtual straight line, while being spaced at a distance d from the first virtual straight line.

摘要翻译： 光拾取器包括全息元件。 全息元件设置有包括用于聚焦的分割部分的全息图图案，其分割用于检测FES的光和用于跟踪用于检测TES的分离光的分割部分。 用于跟踪的分割部分形成在除了插入在第一虚拟直线和第二虚拟直线之间的区域的区域中。 第一虚拟直线在全息元件上平行于X方向绘制，并且在物镜处于中立位置的状态下穿过进入全息元件的反射光的光轴，第二虚拟直线为 平行于第一虚拟直线绘制，同时与第一虚拟直线间隔开距离d。

公开(公告)号：US07990834B2

公开(公告)日：2011-08-02

申请号：US11495907

申请日：2006-07-28

申请人： Tetsuo Ueyama ,  Osamu Miyazaki ,  Yukio Watanabe ,  Yasuo Nakata ,  Tomio Mashiyama

发明人： Tetsuo Ueyama ,  Osamu Miyazaki ,  Yukio Watanabe ,  Yasuo Nakata ,  Tomio Mashiyama

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0903

摘要： An optical pickup device has a semiconductor laser emitting light which is in turn branched via a diffraction grating into at least three beams of light including a main beam and two sub beams which are in turn condensed via an objective lens on an optical disk at a guide groove and reflected by the optical disk to provide three reflections of light which are in turn received by detectors, each divided into two regions, respectively, to generate a tracking error signal. The diffraction grating is divided into three regions including a first region, a second region and a third region located intermediate therebetween, each having a periodical structure out of phase, the periodical structure having grating grooves in a direction determined depending on the phase of the second region to incline relative to a direction perpendicular to the guide groove of the optical disk.

摘要翻译： 光学拾取装置具有发射光的半导体激光器，该半导体激光器又通过衍射光栅分支成至少三束光束，所述至少三束光包括主光束和两个子光束，所述至少三个光束又通过物镜在光盘上以引导 凹槽并由光盘反射以提供三次反射的光，这些反射又被检测器接收，每个被分成两个区域以产生跟踪误差信号。 衍射光栅分为三个区域，包括第一区域，第二区域和位于其间的第三区域，每个区域具有异相的周期性结构，该周期结构具有根据第二区域的相位确定的方向的光栅槽 区域相对于垂直于光盘的引导槽的方向倾斜。

公开(公告)号：US20050141391A1

公开(公告)日：2005-06-30

申请号：US11060680

申请日：2005-02-16

申请人： Tetsuo Ueyama ,  Keiji Sakai ,  Yukio Kurata ,  Katsushige Masui ,  Naotaka Otsuka ,  Renzaburo Miki ,  Hiroshige Hirajima ,  Noboru Fujita

发明人： Tetsuo Ueyama ,  Keiji Sakai ,  Yukio Kurata ,  Katsushige Masui ,  Naotaka Otsuka ,  Renzaburo Miki ,  Hiroshige Hirajima ,  Noboru Fujita

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/12 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  G11B7/22

CPC分类号： G11B7/131 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0906 ,  G11B7/0908 ,  G11B7/0916 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1381 ,  G11B7/22 ,  G11B2007/0006

摘要： An optical pickup can be provided, the optical pickup being capable of recording and playback of a plurality of optical disks having different specs by using light beams of different wavelengths, and further being suitable for integrating the semiconductor lasers and light receiving elements into a single package, by including: first and second semiconductor lasers adjacently disposed; a three-beam diffraction grating for generating three beams for tracking control; a second hologram element for diffracting light of the second semiconductor laser to guide it to a photosensor; a complex polarization beam splitter (PBS) for reflecting only light from the first semiconductor laser; and a first hologram element for diffracting light of the first semiconductor laser to guide it to the photosensor.