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1. 发明授权

US5085496A Optical element and optical pickup device comprising it 失效
标题翻译：光学元件和包含它的光学拾取器件
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.

2. 发明授权

US4812638A Focusing error detector and optical data detecting device incorporating the focusing error detector 失效
标题翻译：聚焦误差检测器和结合了聚焦误差检测器的光学数据检测装置
公开(公告)号：US4812638A
公开(公告)日：1989-03-14
申请号：US78773
申请日：1987-07-28
申请人： Nobuo Ogata , Yasuo Nakata , Hideaki Satou , Toshiyuki Tanaka , Etsuji Minami , Yoshio Yoshida , Yukio Kurata , Teruaki Inoue, deceased
发明人： Nobuo Ogata , Yasuo Nakata , Hideaki Satou , Toshiyuki Tanaka , Etsuji Minami , Yoshio Yoshida , Yukio Kurata , Teruaki Inoue, deceased
IPC分类号： G11B7/09 , G11B7/135 , G01J1/20
CPC分类号： G11B7/22 , G11B7/0909 , G11B7/13922
摘要： A focusing error detector comprises a light source, a collimator lens for making parallel the pencil of rays emitted by the light source, an objective lens which focuses the parallel pencil of rays to form a beam spot on a data-recording disc with data tracks and guide tracks formed thereon and which receives the pencil of rays reflected from the data-recording disc, an optical system for forming a beam spot from the reflected pencil of rays incident to the objective lens, and an optical detector having a plurality of divided optical sensor blocks for receiving the formed beam spot so as to detect the focusing error of the beam spot formed on the data-recording disc on the basis of the configuration of the received beam spot.
摘要翻译：聚焦误差检测器包括光源，用于使平行于光源发射的光线的准直透镜，物镜，其将平行的光线聚焦以形成具有数据轨迹的数据记录盘上的光点，形成在其上的导轨，其接收从数据记录盘反射的光线，用于从入射到物镜的反射的射线形成束斑的光学系统;以及光学检测器，具有多个分开的光学传感器用于接收形成的光束点的块，以便根据接收的光束点的配置来检测形成在数据记录盘上的光束点的聚焦误差。

3. 发明授权

US4985880A Optical information recording and reproducing apparatus 失效
标题翻译：光信息记录和再现装置
公开(公告)号：US4985880A
公开(公告)日：1991-01-15
申请号：US247355
申请日：1988-09-21
申请人： Yoshio Yoshida , Nobuo Ogata , Mitsuo Ishii , Yukio Kurata , Yasuo Nakata , Takayuki Inoue , Kazuko Inoue
发明人： Yoshio Yoshida , Nobuo Ogata , Mitsuo Ishii , Yukio Kurata , Yasuo Nakata , Takayuki Inoue , Kazuko Inoue
IPC分类号： G11B11/10 , G11B11/105 , G11B27/36
CPC分类号： G11B11/10595 , G11B11/10504 , G11B11/10515 , G11B27/36
摘要： An improved optical information recording and reproducing apparatus which is capable of detecting recording errors simultaneously with recording function for reduction of recording time, without requiring particular high accuracy for an optical system, and avoiding complication in the construction and consequent large size of the optical system.

4. 发明授权

US5050155A Pick-up device for use in an optical information recording system utilizing a diffraction grating with blaze characteristics 失效
$Pick-up device for use in an optical information recording system utilizing a diffraction grating with blaze characteristics$
标题翻译：拾取装置用于利用具有火焰特征的衍射光栅的光学信息记录系统
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.

5. 发明授权

US4849825A Pick-up device for use in an optical information recording system 失效
标题翻译：用于光学信息记录系统的拾取装置
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。

6. 发明授权

US5428595A Optical information recording and reproducing device 失效
标题翻译：光信息记录和再现装置
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。

7. 发明授权

US5189655A Optical head for optical disk recording/reproducing apparatus including modified Wollaston prism 失效
标题翻译：用于光盘记录/再现设备的光学头包括修改的WOLLASTON PRISM
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.

8. 发明授权

US06614720B1 Optical pickup device 失效
标题翻译：光学拾取装置
公开(公告)号：US06614720B1
公开(公告)日：2003-09-02
申请号：US09559515
申请日：2000-04-27
申请人： Nobuo Ogata , Chiaki Kiyooka , Makoto Horiyama , Kohji Minami , Takahiro Miyake , Yasuo Nakata
发明人： Nobuo Ogata , Chiaki Kiyooka , Makoto Horiyama , Kohji Minami , Takahiro Miyake , Yasuo Nakata
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/123 , G11B7/131 , G11B7/1356 , G11B7/1398
摘要： Beam shaping means may have a shaping ratio set to allow a light beam emitted from a semiconductor laser and having an elliptic intensity distribution to have an ellipticity of no more than two to obtain a spot achieving high light availability and reduced in size. Furthermore, the shaping ratio can be set to no more than 2.5 to allow a polalized-beam splitter (light separation means) and other components to be arranged in a converged flux passing between the semiconductor laser and a collimator lens.
摘要翻译：光束成形装置可以具有设置成允许从半导体激光器发射的并且具有椭圆形强度分布的光束具有不大于2的椭圆率的成形比，以获得实现高光可用性并减小尺寸的光斑。此外，成形比可以设定为不大于2.5，以允许在半导体激光器和准直透镜之间通过的会聚通量中布置有光束分束器（光分离装置）和其他部件。

9. 发明授权

US06392970B1 Reproducing light quantity control method for optical memory device, and reproducing light quantity control device, and optical recording medium 失效
标题翻译：再现光存储装置的光量控制方法，再现光量控制装置和光记录介质
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。

10. 发明授权

US5446721A Objective lens drive device with support system 失效
标题翻译：物镜驱动装置带支撑系统
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。

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