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：US20080151337A1

公开(公告)日：2008-06-26

申请号：US12001793

申请日：2007-12-11

申请人： Yasunori Kanazawa ,  Tetsuo Ueyama

发明人： Yasunori Kanazawa ,  Tetsuo Ueyama

IPC分类号： G03H1/02

CPC分类号： G03H1/22 ,  G03H1/2286 ,  G03H2001/2289 ,  G03H2222/10 ,  G11B7/0065 ,  G11B7/00736 ,  G11B7/00772 ,  G11B7/126

摘要： For controlling a wavelength of laser light of a wavelength-variable laser (step S0), an optical system or a hologram recording medium is moved (step S1) to attain a state in which a light beam enters a wavelength control pattern. Reference light that is the laser light is applied to the wavelength control pattern (step S2). Then, a light receiving element observes reproduction light from the wavelength control pattern (step S3). A wavelength of the reference light that is the laser light is minutely changed. A quantity of the reproduction light changes with the wavelength. The quantity of the reproduction light is monitored to obtain a specific wavelength λ0 (a rotation angle of a diffraction grating 52) maximizing the quantity of the reproduction light (step S4). The wavelength of the laser light of the wavelength-variable laser light source is adjusted (step S5).

摘要翻译： 为了控制波长可变激光器的激光波长（步骤S0），移动光学系统或全息图记录介质（步骤S1），以获得光束进入波长控制图案的状态。 作为激光的基准光被施加到波长控制图案（步骤S2）。 然后，受光元件观察来自波长控制图案的再现光（步骤S3）。 作为激光的参考光的波长被微小地改变。 一定量的再现光随波长而变化。 监视再现光的量以获得最大化再现光量的特定波长λ（0）（衍射光栅52的旋转角度））（步骤S 4）。 调整波长可变激光光源的激光的波长（步骤S5）。

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：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：US20050152636A1

公开(公告)日：2005-07-14

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： G11B11/105 ,  G02B6/26 ,  G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135

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：US5881035A

公开(公告)日：1999-03-09

申请号：US760439

申请日：1996-12-04

申请人： Tetsuo Ueyama

发明人： Tetsuo Ueyama

IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/004 ,  G11B7/085 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

CPC分类号： G11B7/131 ,  G11B7/08511 ,  G11B7/0943 ,  G11B7/0945 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013 ,  G11B7/0909 ,  G11B7/0916

摘要： Light from a semiconductor laser is converged by an objective lens onto an optical disk, and return light thereof is directed to a light receiving element by a three-division hologram element. The light receiving element includes a two-division main light receiving region for detecting a focus error signal and sub light receiving regions respectively provided on both sides of the main light receiving region for compensating the focus error signal. Based on output signals of the above main and sub light receiving regions, a focus error signal is detected. Note that it is arranged that the sub light receiving regions receive the return light from the optical disk and hence output signals only when the objective lens defocuses being positioned outside a dynamic range. Therefore, with the use of outputs of the sub light receiving regions, the focus error signal is quickly converged to 0, when the objective lens is positioned outside the dynamic range. As a result, even during a focus servo with respect to a multilayer optical disk wherein recording layers are provided at small intervals, it is possible to obtain an accurate focalizing position of the objective lens since respective focus error signals, obtained with respect to each recording layer, do not interfere each other.

摘要翻译： 来自半导体激光器的光由物镜会聚到光盘上，并且其返回光通过三分割全息元件被引导到光接收元件。 光接收元件包括用于检测聚焦误差信号的二分割主光接收区域和分别设置在主光接收区域两侧的子光接收区域，用于补偿聚焦误差信号。 基于上述主光接收区域和次光接收区域的输出信号，检测聚焦误差信号。 应注意的是，子光接收区域仅在物镜偏心位于动态范围之外时才接收来自光盘的返回光并且因此接收输出信号。 因此，通过使用副光接收区域的输出，当物镜位于动态范围之外时，聚焦误差信号被快速地收敛到0。 结果，即使在聚焦伺服相对于以小间隔设置记录层的多层光盘的聚焦伺服中，也可以获得物镜的精确聚焦位置，因为相对于每个记录获得的各个聚焦误差信号 层，不要互相干扰。

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：US20070081431A1

公开(公告)日：2007-04-12

申请号：US10551509

申请日：2004-03-23

申请人： Yukio Watanabe ,  Tetsuo Ueyama

发明人： Yukio Watanabe ,  Tetsuo Ueyama

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/1275 ,  G11B7/1353 ,  G11B2007/0006

摘要： A grating (3) including first and second regions (B1 and B2) through which the light beams, having wavelengths λ1 and λ2, respectively, pass, each of the regions including a region having diffraction grooves whose concavoconvex pitches are partially shifted so that a pattern is provided to cause each of the first and second light beams to have a partial phase shift. The pattern is set so that amplitudes of push-pull signals of the sub-beams are substantially cancelled in each of the light beams having different wavelengths. With this, it is possible to provide an optical pickup (i) having a plurality having different light sources in one package, (ii) capable of realizing low cost in the case in which the optical pickup carries out track detection using three beams with respect to any optical discs, such as DVDs and CDs, and (iii) capable of realizing simplifications of assembly adjustment and the pickup.

摘要翻译： 包括分别具有波长λ1和λ2的光束通过的第一和第二区域（B 1和B 2）的光栅（3），每个区域包括具有凹凸部分的衍射凹槽的区域 移位，使得提供图案以使得第一和第二光束中的每一个具有部分相移。 设置图案，使得在具有不同波长的每个光束中基本上消除子光束的推挽信号的幅度。 由此，可以在一个封装中提供具有多个具有不同光源的光学拾取器（i），（ii）在光学拾取器使用三个光束执行磁道检测的情况下能够实现低成本 对于诸如DVD和CD的任何光盘，以及（iii）能够实现组装调整和拾取的简化。

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.