公开(公告)号：US5696742A

公开(公告)日：1997-12-09

申请号：US637829

申请日：1996-04-25

申请人： Nobuo Ogata ,  Yasuo Nakata ,  Yoshihiro Sekimoto ,  Kunio Kojima ,  Hideaki Sato

发明人： Nobuo Ogata ,  Yasuo Nakata ,  Yoshihiro Sekimoto ,  Kunio Kojima ,  Hideaki Sato

IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13 ,  G11B11/105 ,  G11B7/085

CPC分类号： G11B7/094 ,  G11B7/0941 ,  G11B11/10576 ,  G11B7/0904 ,  G11B7/0943 ,  G11B7/0948

摘要： A light sensor is divided into two light receiving sections which receive light reflected by an optical disk. A first intermediate address signal is generated from a difference signal of outputs of the light receiving sections. A second intermediate address signal is generated from a sum signal of outputs of the light receiving sections. An address generating circuit generates an address signal by using the first and second intermediate address signals. An optical disk device stably generating an address signal regardless of a displacement of an objective lens and a change in reflectance of the optical disk is thus provided.

摘要翻译： 光传感器被分成接收由光盘反射的光的两个光接收部分。 从光接收部分的输出的差分信号产生第一中间地址信号。 从光接收部分的输出的和信号产生第二中间地址信号。 地址产生电路通过使用第一和第二中间地址信号来产生地址信号。 因此，提供了不管物镜的位移和光盘的反射率的变化如何稳定地产生地址信号的光盘装置。

公开(公告)号：US06392970B1

公开(公告)日：2002-05-21

申请号：US09129191

申请日：1998-07-23

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Tomoyuki Miyake ,  Yasuo Nakata ,  Nobuo Ogata ,  Jun Akiyama ,  Toshiharu Inui ,  Yoshihiro Sekimoto ,  Hideaki Sato

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Tomoyuki Miyake ,  Yasuo Nakata ,  Nobuo Ogata ,  Jun Akiyama ,  Toshiharu Inui ,  Yoshihiro Sekimoto ,  Hideaki Sato

IPC分类号： G11B509

CPC分类号： G11B7/126 ,  G11B7/005 ,  G11B7/00745 ,  G11B11/10515 ,  G11B11/10584 ,  G11B11/10595

摘要： A reproducing light quantity control method for an optical memory device includes the steps of (1) recording test data on an optical recording medium; (2) reproducing the test data recorded on the optical recording medium by changing a reproducing light quantity in a plurality of light quantity values; (3) measuring a quality value and a signal quantity of each of a plurality of reproducing signals from the test data; (4) selecting an optimum reproducing signal quantity from a plurality of reproducing signal quantities in accordance with quality values of the plurality of reproducing signals so as to decide a target value of reproducing signal quantity; and (5) recording the target value on a target value recording region of the optical recording medium. This method reduces the time required to obtain a target value of a reproducing signal quantity and speeds up an operation from installing of the optical recording medium to finishing of preparation for recording and reproducing.

摘要翻译： 一种用于光学存储器件的再现光量控制方法包括以下步骤：（1）将测试数据记录在光学记录介质上; （2）通过改变多个光量值中的再现光量来再现记录在光记录介质上的测试数据; （3）从测试数据测量多个再现信号中的每一个的质量值和信号量; （4）根据多个再现信号的质量值从多个再现信号量中选择最佳再现信号量，以便确定再现信号量的目标值; 和（5）将目标值记录在光学记录介质的目标值记录区上。 该方法减少了获得再现信号量的目标值所需的时间，并且加快了从安装光学记录介质到完成记录和再现准备的操作。

公开(公告)号：US5446721A

公开(公告)日：1995-08-29

申请号：US138014

申请日：1993-10-19

申请人： Yoshihiro Sekimoto ,  Toshiharu Inui ,  Yasuo Nakata ,  Nobuo Ogata ,  Hideaki Sato

发明人： Yoshihiro Sekimoto ,  Toshiharu Inui ,  Yasuo Nakata ,  Nobuo Ogata ,  Hideaki Sato

IPC分类号： G11B7/09 ,  G02B7/02 ,  G11B7/00

CPC分类号： G11B7/0932

摘要： In an objective lens driving apparatus used in an optical information recording and reproducing apparatus or the like, a vibration is suppressed and a resonance peak on transfer function is suppressed when movable portions are moved in focusing and tracking directions and when these portions are turned around focusing and tracking directions. An elastic body which supports the movable portions movably in two directions, i.e., focusing direction and tracking direction to a fixed portion includes a bent portion in an intermediate portion between the side of movable portion and the side of fixed portion. A damper member is adhered to bridge a gap between a branched arm portion branching from a linear portion extending from the side of movable portion, and a fixed portion. The bent portion couples two linear portions and which are not on the same line.

摘要翻译： 在用于光信息记录和再现装置等的物镜驱动装置中，当可移动部分在聚焦和跟踪方向上移动时，并且当这些部分转向聚焦时，抑制振动并抑制传递函数上的共振峰值 和跟踪方向。 支撑可移动部分的弹性体在朝向固定部分的聚焦方向和跟踪方向的两个方向上可移动地包括在可动部分的侧面和固定部分侧之间的中间部分中的弯曲部分。 阻尼构件被粘接以桥接从从可动部分的侧面延伸的直线部分分支的分支臂部分与固定部分之间的间隙。 弯曲部分连接两个线性部分，并且不在同一条线上。

公开(公告)号：US5999502A

公开(公告)日：1999-12-07

申请号：US539523

申请日：1995-10-06

申请人： Yasuo Nakata ,  Nobuo Ogata ,  Kunio Kojima ,  Hideaki Sato

发明人： Yasuo Nakata ,  Nobuo Ogata ,  Kunio Kojima ,  Hideaki Sato

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B11/105 ,  G11B7/095

CPC分类号： G11B7/00718 ,  G11B7/094 ,  G11B7/0945 ,  G11B11/10576 ,  G11B7/0908

摘要： In an optical information recording-reproduction apparatus, a focus servo control circuit generates a focus error signal and a light beam is accurately converged on a surface of an optical disk according to a focus servo control signal based upon the focus error signal. In accordance with the present invention, the focus error signal is compensated by selecting a land section focus offset amount by a switch when land sections are tracked, and it is compensated by selecting a groove section focus offset amount when groove sections are tracked. As a result, since the land sections and the groove sections are controlled by different focus servo control signals, recording and reproducing operations are carried out at the most optimal focusing positions respectively obtainable, thereby making it possible to significantly improve the quality of a reproduced signal.

摘要翻译： 在光信息记录再生装置中，聚焦伺服控制电路根据聚焦误差信号，根据聚焦伺服控制信号，生成聚焦误差信号，光束精确地会聚在光盘的表面上。 根据本发明，通过在跟踪陆地部分时通过开关选择陆地区域焦点偏移量来补偿聚焦误差信号，并且当通过跟踪沟槽部分时选择沟槽部分聚焦偏移量来补偿聚焦误差信号。 结果，由于通过不同的聚焦伺服控制信号来控制焊盘部分和沟槽部分，所以可以分别获得的最佳聚焦位置进行记录和再现操作，从而可以显着提高再现信号的质量 。

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：US5085496A

公开(公告)日：1992-02-04

申请号：US500292

申请日：1990-03-28

申请人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata ,  Nobuo Ogata ,  Tetsuo Ueyama ,  Hideaki Sato

发明人： Yoshio Yoshida ,  Takahiro Miyake ,  Yasuo Nakata ,  Yukio Kurata ,  Nobuo Ogata ,  Tetsuo Ueyama ,  Hideaki Sato

IPC分类号： G02B5/18 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1365 ,  G02B1/118 ,  G02B27/4261 ,  G02B27/4272 ,  G02B5/1809 ,  G02B5/1814 ,  G02B5/1866 ,  G11B11/10543 ,  G11B7/1353

摘要： An optical element comprises a polarization diffraction element that is provided with diffraction gratings that are respectively mounted on different faces of a transparent substrate of a flat plate shape, which grating pitches are equal to each other and approximately equal to the wavelength of an incident light, and which grating lines are parallel. The thickness of the substrate is set such that the difference that occurs between the phases of the P and S polarizations of a light due to the grating, and the difference that occurs between the phases of the two polarizations when the light propagates through the substrate cancel out. The optical pickup device comprising the optical element includes a polarized light detecting unit provided with a diffraction grating which grating pitch is approximately equal to the wavelength of an incident light; a first photodetector that is mounted integrally and virtually in parallel with the substrate, and that receives a zero-order diffracted light produced by the diffraction grating; and a second photodetector that is located in the same plane as the first photodetector and mounted integrally with the first photodetector and the substrate, and that receives a first-order diffracted light produced by the diffraction grating.

公开(公告)号：US5050155A

公开(公告)日：1991-09-17

申请号：US330429

申请日：1989-03-30

申请人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata

发明人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata

IPC分类号： G11B7/12 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/123

摘要： A pick-up device which includes a light source and a condenser lens for effecting recording and reproduction of information by projecting a light beam as collected by the condenser lens onto a recording medium. A diffraction grating is provided between the light source and the condenser lens for dividing light returning from the recording medium by a diffraction grating so as to be directed to a photo-detector, to thereby obtain an optical detection signal.

公开(公告)号：US4849825A

公开(公告)日：1989-07-18

申请号：US928395

申请日：1986-11-10

申请人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata ,  Teruaki Inoue

发明人： Yukio Kurata ,  Hideaki Sato ,  Yasuo Nakata ,  Nobuo Ogata ,  Teruaki Inoue

IPC分类号： G11B7/12 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/123

摘要： A pick-up device which includes a light source and a condenser lens for effecting recording and reproduction of information by projecting a light beam as collected by the condenser lens onto a recording medium. A diffraction grating is provided between the light source and the condenser lens for dividing light returning from the recording medium by a diffraction grating so as to be directed to a photo-detector, to thereby obtain an optical detection signal.

摘要翻译： 一种拾取装置，其包括光源和聚光透镜，用于通过将由聚光透镜收集的光束投射到记录介质上来进行信息的记录和再现。 在光源和聚光透镜之间设置衍射光栅，用于通过衍射光栅分离从记录介质返回的光，以便被引导到光检测器，从而获得光检测信号。

公开(公告)号：US5428595A

公开(公告)日：1995-06-27

申请号：US9911

申请日：1993-01-27

申请人： Yoshio Yoshida ,  Hideaki Sato ,  Yukio Kurata ,  Hiroyuki Yamamoto ,  Nobuo Ogata ,  Katsuhiro Kubo

发明人： Yoshio Yoshida ,  Hideaki Sato ,  Yukio Kurata ,  Hiroyuki Yamamoto ,  Nobuo Ogata ,  Katsuhiro Kubo

IPC分类号： G11B7/09 ,  G11B7/135 ,  G11B17/32

CPC分类号： G11B7/1353

摘要： An optical information recording and reproducing device is provided. The device includes a light source for emitting a light beam, a first diffraction element for splitting the light beam into at least three diffracted beams, an optical system guiding the diffracted beams to a recording medium, and a second diffraction element including at least one division line and a diffraction surface from which the diffracted beams are diffracted. The diffraction surface is divided into at least two regions by the division line or lines. One of the division lines is at a predetermined angle against the direction of a track on the recording medium, and the regions split each of the diffracted beams into at least two parts to diffract the parts in different directions. The device also includes an optical detecting element for detecting the light beams diffracted with the second diffraction element.

摘要翻译： 提供了一种光信息记录和再现装置。 该装置包括用于发射光束的光源，用于将光束分成至少三个衍射光束的第一衍射元件，将衍射光束引导到记录介质的光学系统，以及包括至少一个分割部分的第二衍射元件 线衍射面和衍射光束衍射的衍射面。 通过划分线或线将衍射面分成至少两个区域。 分割线之一与记录介质上的轨道的方向成预定角度，并且区域将每个衍射光束分成至少两个部分，以在不同方向上衍射该部分。 该装置还包括用于检测与第二衍射元件衍射的光束的光学检测元件。

公开(公告)号：US5442616A

公开(公告)日：1995-08-15

申请号：US16456

申请日：1993-02-11

申请人： Nobuo Ogata ,  Hideaki Sato

发明人： Nobuo Ogata ,  Hideaki Sato

IPC分类号： G11B7/08 ,  G11B7/09 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135 ,  G11B7/22

CPC分类号： G11B7/22 ,  G11B7/123 ,  G11B7/1353

摘要： A diffraction element is positionally adjusted on a substitute optical head arrangement while an objective lens is positionally adjusted so as to maximize a total signal calculated in a photodetector, whereby predetermined focusing error signal and tracking error signal are obtained. The thus adjusted diffraction element is adhesively secured on a package housing a light source and a photodetector to form a light source unit. The thus prepared light source unit is positioned on and assembled into an optical head by angularly adjusting the light source and an objective lens on the optical head individually so that both the optical axis of the light, emitted from the light source, and incident on a recording medium and the axis of the objective lens are aligned normal to the recording medium and by coinciding the optical axis of the objective lens with the center of intensity distribution of the incident light on the objective lens. This configuration eliminates the necessity of mechanical parts on the optical head for adjusting the diffraction element and the necessity of a space for the adjustment, so that it is possible to promote the optical head small and light-weighted. In addition, by effecting the optical adjustment when the light source unit is assembled into the optical head, error signals can be adjusted. Therefore, the adjustment step can be omitted.

摘要翻译： 衍射元件在替代光学头装置上进行位置调整，同时物镜被位置调节，以使在光电检测器中计算的总信号最大化，从而获得预定的聚焦误差信号和跟踪误差信号。 这样调节的衍射元件被粘合地固定在容纳光源和光电检测器的封装件上以形成光源单元。 由此制备的光源单元通过将光源和物镜上的物镜单独地角度地调节并组装成光学头，使光源的光轴从光源发射并入射到 记录介质，并且物镜的轴线与记录介质垂直对准，并且通过使物镜的光轴与入射光在物镜上的强度分布的中心重合。 这种结构消除了光学头上用于调节衍射元件的机械部件的必要性和调整空间的必要性，使得可以促进光学头小型化和轻量化。 此外，通过在将光源单元组装到光头中时进行光学调整，可以调整误差信号。 因此，可以省略调整步骤。