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：US07397752B2

公开(公告)日：2008-07-08

申请号：US10846282

申请日：2004-05-14

申请人： Tetsuo Ueyama ,  Kohji Minami ,  Tomoyuki Miyake ,  Yasuo Nakata

发明人： Tetsuo Ueyama ,  Kohji Minami ,  Tomoyuki Miyake ,  Yasuo Nakata

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1365 ,  G11B11/10545 ,  G11B11/10597 ,  G11B2007/0006

摘要： A pickup for a magneto-optical recording medium is provided, which improves quality of reproduced signals by eliminating a phase difference between the polarizations and is capable of coping with magneto-optical recording media of different recording/reproducing systems. A return light beam of light reflected by a magneto-optical recording medium is polarized and separated into ± first-order diffracted lights through a light-branching diffraction element provided between a light source and an objective lens. The ± first-order diffracted lights are compensated for their phases through first and second phase compensation elements so that there is no phase difference between the polarizations, and are, further, polarized and separated through the first and second polarization/separation elements, and are received by first and second light detectors. Use of the first and second phase compensation elements having different phase compensation amounts makes it possible to cope with the magneto-optical recording media of different recording/reproducing systems.

摘要翻译： 提供了一种用于磁光记录介质的拾取器，其通过消除极化之间的相位差来提高再现信号的质量，并且能够应对不同记录/再现系统的磁光记录介质。 由磁光记录介质反射的返回光束被偏振并通过设置在光源和物镜之间的光分支衍射元件分离为±一级衍射光。 ±一级衍射光通过第一和第二相位补偿元件对其相位进行补偿，使得在极化之间不存在相位差，并且还通过第一和第二偏振/分离元件偏振和分离，并且 由第一和第二光检测器接收。 使用具有不同相位补偿量的第一和第二相位补偿元件使得可以应对不同记录/再现系统的磁光记录介质。

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：USD416027S

公开(公告)日：1999-11-02

申请号：US85426

申请日：1998-03-23

申请人： Tetsuo Ueyama

设计人： Tetsuo Ueyama

公开(公告)号：US5331621A

公开(公告)日：1994-07-19

申请号：US983423

申请日：1992-12-02

申请人： Takahiro Miyake ,  Yoshio Yoshida ,  Katushiro Kubo ,  Tetsuo Ueyama ,  Yukio Kubata

发明人： Takahiro Miyake ,  Yoshio Yoshida ,  Katushiro Kubo ,  Tetsuo Ueyama ,  Yukio Kubata

IPC分类号： G11B7/00 ,  G02B5/32 ,  G11B7/0065 ,  G11B7/085 ,  G11B7/09 ,  G11B7/135 ,  G11B11/105 ,  G11B7/13

CPC分类号： G11B7/1353 ,  G02B5/32 ,  G11B11/10532 ,  G11B11/10556 ,  G11B7/08564

摘要： An optical pickup apparatus including a light emitting source, a hologram element for scanning a recording medium with light beams emitted from the light emitting source, a hologram lens for focusing the light beams introduced from the hologram element on the recording medium, an optical detector for detecting the light beams reflected from the recording medium, and a first optical system for directing the light beams reflected from the recording medium to the optical detector. The hologram element includes an optical diffraction grating for diffracting the light beams emitted from the light emitting source and a control means for controlling the rotation of the hologram element in a swinging manner. The hologram element can have hologram gratings on both surfaces thereof; one of them has a pattern of straight lines and the other has a pattern of concentric circles to obtain a widened deflection angle.

摘要翻译： 一种光拾取装置，包括发光源，用于从发光源发射的光束扫描记录介质的全息元件，用于将从全息元件引入的光束聚焦在记录介质上的全息透镜，用​​于 检测从记录介质反射的光束;以及第一光学系统，用于将从记录介质反射的光束引导到光学检测器。 全息元件包括用于衍射从发光源发射的光束的光学衍射光栅和用于以摆动方式控制全息元件的旋转的控制装置。 全息元件可以在其两个表面上具有全息图光栅; 其中一个具有直线的图案，另一个具有同心圆的图案以获得加宽的偏转角。

公开(公告)号：US5189655A

公开(公告)日：1993-02-23

申请号：US580830

申请日：1990-09-11

申请人： Nobuo Ogata ,  Tetsuo Ueyama ,  Yoshihiro Sekimoto ,  Toshiyuki Tanaka ,  Hideaki Sato

发明人： Nobuo Ogata ,  Tetsuo Ueyama ,  Yoshihiro Sekimoto ,  Toshiyuki Tanaka ,  Hideaki Sato

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

CPC分类号： G11B7/1356 ,  G11B11/10541 ,  G11B7/09

摘要： An optical head, for an optical disk recording/reproducing apparatus, for irradiating a recording medium by a light beam emitted from a light source and introducing an information light formed by a light beam reflected from the recording medium to a photo detector, a shift of an optical axis of the information light being minimized. The optical head includes a unit for receiving the information light which is reflected from the recording medium, a first reflecting unit for reflecting such information light, a second reflecting unit for reflecting the information light reflected by the first reflecting unit and for directing the reflected information light toward the photo detecting system, and a unit for emerging the information light reflected by the second reflecting unit to the photo detecting system. The first reflecting unit has a surface for reflecting the information light thereby, and the second reflecting unit also has a surface for reflecting the reflected information light from the surface of the first reflecting unit. The surface of the first reflecting unit is substantially parallel to the surface of the second reflecting unit. The emerging surface has a surface from which the information light reflected by the surface of the second reflecting unit emerges. An angle between the surface of the receiving unit and the surface of the first reflecting unit is substantially equal to an angle between the surface of the second reflecting unit and the surface of the emerging unit.

公开(公告)号：US07483360B2

公开(公告)日：2009-01-27

申请号：US10954923

申请日：2004-09-29

申请人： Katsushige Masui ,  Kazuhiro Tsuchida ,  Kazunori Matsubara ,  Masahiro Ikehara ,  Keiji Sakai ,  Tetsuo Ueyama ,  Toshiya Nagahama

发明人： Katsushige Masui ,  Kazuhiro Tsuchida ,  Kazunori Matsubara ,  Masahiro Ikehara ,  Keiji Sakai ,  Tetsuo Ueyama ,  Toshiya Nagahama

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/1353 ,  G11B2007/0013

摘要： To read information from a target information recording surface reliably by canceling DC offsets in tracking-signal detection signals is provided. In effecting tracking servo by 3-beam method, auxiliary light receiving domains D3—1, D3—2, D8—1, D8—2 are provided. The auxiliary light receiving domain receives images formed by the light returned from a different information recording surface from the one targeted for reading. Sub beams of ± first-order diffracted light enter the light receiving domains D3, D8, D1, D10. With respect to the diffraction direction of the hologram, the auxiliary light receiving domains D3—1, D3—2 (D8—1, D8—2) are provided on both sides of the light receiving domain D3 (D8). Since signals are computed as: D8−(D8—1+D8—2); and D3−(D3—1+D3—2) with the internal connection, DC offsets can be canceled in RES signals (D1+D3, D8+D10) used in the DPP method.

摘要翻译： 提供通过消除跟踪信号检测信号中的DC偏移来可靠地从目标信息记录表面读取信息。 通过三光束法实现跟踪伺服，提供辅助光接收域D3-1，D3-2，D8-1，D8-2。 辅助光接收区域接收由不同信息记录表面返回的光从与读取对象相对应的光形成的图像。 ±一级衍射光的子光进入光接收域D3，D8，D1，D10。 对于全息图的衍射方向，辅助光接收区域D3-1，D3-2（D8-1，D8-2）设置在光接收区域D3（D8）的两侧。 由于信号计算如下：D8-（D8-1 + D8-2）; 和D3-（D3-1 + D3-2）内部连接时，可以在DPP方式中使用的RES信号（D1 + D3，D8 + D10）中取消DC偏移。

公开(公告)号：US07369479B2

公开(公告)日：2008-05-06

申请号：US11029599

申请日：2005-01-04

申请人： Masaru Ogawa ,  Tetsuo Ueyama ,  Kohji Minami ,  Tomoyuki Miyake ,  Tomiyuki Numata

发明人： Masaru Ogawa ,  Tetsuo Ueyama ,  Kohji Minami ,  Tomoyuki Miyake ,  Tomiyuki Numata

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0901 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1381

摘要： The optical miniaturized module includes a semiconductor laser for irradiating an optical disk with laser light, a diffraction grating for forming a main beam and two sub beams from the laser light, a polarization hologram for dividing reflected light from the optical disk, and a photodetector for detecting the reflected light. The polarization hologram includes a first parting line defined in a direction optically corresponding to a radial direction as the optical disk rotates. A main beam M incident area is divided with a boundary defined by the first parting line. A sub beam A incident area and a sub beam B incident area are each arranged avoiding the first parting line.

摘要翻译： 该光学小型化模块包括用于用激光照射光盘的半导体激光器，用于形成主光束的衍射光栅和来自激光的两个子光束，用于分离来自光盘的反射光的偏振全息图，以及用于 检测反射光。 偏振全息图包括在光盘旋转时沿与光学对应的方向限定的第一分型线。 主波束M入射区域由第一分隔线限定的边界划分。 分别设置子光束A入射区域和副光束B入射区域，避开第一分色线。

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：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。