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1. 发明授权

US06721242B2 Optical detector having three light receiving areas 有权
标题翻译：具有三个光接收区域的光学检测器
公开(公告)号：US06721242B2
公开(公告)日：2004-04-13
申请号：US10142896
申请日：2002-05-13
申请人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
发明人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
IPC分类号： G11B7095
CPC分类号： G11B7/131 , G11B7/00718 , G11B7/0901 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0943
摘要： An optical detector for detecting at least three optical beams reflected by an optical information recording medium and outputting an electric signal, the optical detector having three light receiving areas each of which receives a respective one of the three optical beams and each of which has four light receiving surfaces, twelve signal lines to transmit an electric signal obtained on respective ones of the four light receiving surfaces of the three light receiving areas, selected ones of the twelve signal lines connected to the four light receiving surfaces of different ones of the three light receiving areas being joined together within the optical detector, and less than nine signal output lines formed by joining the selected ones of the twelve signal lines extend from the optical detector to a signal processing circuit.
摘要翻译：一种用于检测由光学信息记录介质反射并输出电信号的至少三个光束的光学检测器，该光学检测器具有三个光接收区域，每个光接收区域接收三个光束中的相应一个，并且每个光接收区域具有四个光接收表面，用于传输在三个光接收区域的四个光接收表面中的相应一个上获得的电信号的十二条信号线，连接到三个光接收区中的不同光接收表面的四个光接收表面的十二个信号线中的选定的一个区域在光学检测器内连接在一起，并且通过连接十二条信号线中所选择的信号线形成的少于九条信号输出线从光学检测器延伸到信号处理电路。

2. 发明授权

US06934228B2 Optical head 失效
标题翻译：光头
公开(公告)号：US06934228B2
公开(公告)日：2005-08-23
申请号：US10827339
申请日：2004-04-20
申请人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
发明人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
IPC分类号： G11B7/00 , G11B7/007 , G11B7/09 , G11B7/13 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An optical head having a semiconductor laser and a generation of a plurality of reflected light beams from an optical disk which have polarities of intensity distribution variations which are substantially inverted to each other when a periodic structure of the optical disk crosses at least one focused spot on the disk. An optical detection system splits the plurality of reflected light beams and detects the split reflected light beams. An electrical circuit provides a focus error signal of the at least one focused spot and a tracking error signal from the plurality of reflected light beams. The electrical circuit adds focus error signals provides a difference signal between the focus error signals, amplifies tracking error signals with a gain, and obtains a difference between amplified tracking error.
摘要翻译：具有半导体激光器的光学头和从光盘产生多个具有强度分布变化的极性的多个反射光束的光头，当光盘的周期性结构与至少一个聚焦点交叉时，其基本上相互反转磁盘。光学检测系统分割多个反射光束并检测分离的反射光束。电路提供至少一个聚焦点的聚焦误差信号和来自多个反射光束的跟踪误差信号。电路增加聚焦误差信号在聚焦误差信号之间提供差分信号，用增益放大跟踪误差信号，并获得放大跟踪误差之间的差异。

3. 发明授权

US06728173B2 Information reproducing method which reproduces plural components of a focus error signal and a tracking error signal from plural detection regions of plural reflected light beams 失效
标题翻译：信息再现方法，其从多个反射光束的多个检测区域再现聚焦误差信号的多个分量和跟踪误差信号
公开(公告)号：US06728173B2
公开(公告)日：2004-04-27
申请号：US10131225
申请日：2002-04-25
申请人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
发明人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An information reproducing method for reproducing information recorded on a medium by irradiating a laser beam and detecting a reflected light beam from the medium. The method includes detecting a plurality of reflected light beams in which the polarities of variations in reflected light beam intensity distributions are substantially inverted to each other, the distribution variation being produced when a light spot of the laser beam crosses a track on the medium, generating components of a focus error signal and components of a tracking error signal, adding the components of the focus error signal of the plurality of reflected light beams to generate a focus error signal, and taking a difference between the components of the tracking error signal of the plurality of reflected light beams to generate a tracking error signal.
摘要翻译：一种信息再现方法，用于通过照射激光束和从介质检测反射光来再现记录在介质上的信息。该方法包括检测多个反射光束，其中反射光束强度分布的变化的极性基本上彼此反转，当激光束的光斑穿过介质上的光道时产生分布变化，产生聚焦误差信号的分量和跟踪误差信号的分量，将多个反射光束的聚焦误差信号的分量相加以产生聚焦误差信号，并且获取光信号的跟踪误差信号的分量多个反射光束产生跟踪误差信号。

4. 发明授权

US06507009B1 Optical detector, signal processing circuit and optical information reproduction apparatus thereof 有权
标题翻译：光检测器，信号处理电路及其光信息再生装置
公开(公告)号：US06507009B1
公开(公告)日：2003-01-14
申请号：US09347530
申请日：1999-07-06
申请人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
发明人： Kunikazu Ohnishi , Takeshi Shimano , Shigeru Nakamura , Masayuki Inoue , Yukio Fukui , Yasuyuki Sugi , Shinji Fujita , Mitsuhiko Ota
IPC分类号： G02B704
CPC分类号： G11B7/131 , G11B7/00718 , G11B7/0901 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0943
摘要： It is desirable to greatly reduce the disturbance that arises in a focusing error signal by a astigmatic detection method and offset that arises in the tracking error signal by a push-pull method when reproducing various information storing disks, such as a DVD-RAM disk. It is also desirable to provide an optical disk apparatus which is able to reproduce a variety of high density optical disks, such as DVD-RAM and DVD-ROM disks, as well as conventional disks, such as CD, CD-ROM, CD-R disks, by using a simple optional head. For this purpose, an optical disk apparatus irradiates three optical beams produced by a diffraction grating on the specified position of an optical disk and detects reflected light using a specified optical detector divided into twelve parts.
摘要翻译：期望通过散像检测方法和再现各种信息存储盘（例如DVD-RAM盘）时通过推挽方法在跟踪误差信号中产生的偏移来大大降低在聚焦误差信号中产生的干扰。还希望提供能够再现诸如DVD-RAM和DVD-ROM盘的各种高密度光盘以及诸如CD，CD-ROM，CD-ROM等常规盘的光盘装置， R盘，通过使用简单的可选头。为此，光盘装置将由衍射光栅产生的三个光束照射在光盘的指定位置上，并使用分为十二部分的特定光学检测器检测反射光。

5. 发明授权

US06400664B1 Optical head including electrical circuit which produces focus error signal and tracking error signal unaffected by variations in intensity distributions of reflected light beams 失效
标题翻译：光头包括产生聚焦误差信号的电路，跟踪误差信号不受反射光束强度分布变化的影响
公开(公告)号：US06400664B1
公开(公告)日：2002-06-04
申请号：US09249290
申请日：1999-02-12
申请人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
发明人： Takeshi Shimano , Shigeru Nakamura , Kunikazu Ohnishi , Masayuki Inoue , Yukio Fukui
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An optical head eliminates an disturbance which occurs in a focus error signal in association with the decentering of an optical disk when an optical spot crosses a track on a storage film surface, and in addition the optical head cancels an off-set which occurs in a tracking error signal in association with the movement of an objective lens. In the constitution of the optical head, phases of wave surfaces of ±1st order diffracted lights are shifted by an amount of &lgr;/2 with a common period by using a phase-inverted diffraction grating the phase of which is inverted with a period of D &lgr;/(2P . NA) in a radial direction of the optical disk, thus causing, on the optical disk, sub-spots to be located on the same track as a main-spot. Taking advantage of this location, focal point shift error signals of the main-spot and the sub-spots are added to each other with an appropriate gain ratio, thereby making it possible to cancel the disturbance which occurs in the focus error signal. Meanwhile, tracking error signals of the main-spot and the sub-spots according to a push-pull method are subtracted from each other with an appropriate gain ratio, thereby making it possible to cancel the off-set.
摘要翻译：当光点穿过存储膜表面上的轨道时，光头消除了在与光盘的偏心相关联的聚焦误差信号中发生的干扰，此外，光学头消除了发生在与物镜的移动相关的跟踪误差信号。在光头的结构中，±1级衍射光的波面的相位通过使用相位相反的衍射光栅以公共周期偏移量，其相位相位与D的周期反转羔羊/（2P.NA）在光盘的径向方向上，从而在光盘上使得子点位于与主光点相同的轨道上。利用该位置，以适当的增益比将主点和子点的焦点偏移误差信号相加，从而可以消除在聚焦误差信号中发生的干扰。同时，以适当的增益比相减，根据推挽方法将主点和子点的跟踪误差信号相减，从而可以消除偏移。

6. 发明授权

US6125087A Optical pickup for optical disk apparatus 失效
标题翻译：光盘装置用光拾取器
公开(公告)号：US6125087A
公开(公告)日：2000-09-26
申请号：US965448
申请日：1997-11-06
申请人： Kunikazu Ohnishi , Masayuki Inoue , Tohru Sasaki , Yukio Fukui , Takeshi Nakao , Takeshi Shimano
发明人： Kunikazu Ohnishi , Masayuki Inoue , Tohru Sasaki , Yukio Fukui , Takeshi Nakao , Takeshi Shimano
IPC分类号： G11B7/00 , G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135
CPC分类号： G11B7/131 , G11B7/0901 , G11B7/123 , G11B7/1353 , G11B2007/0006 , G11B7/0908 , G11B7/0916 , G11B7/0943
摘要： Disclosed is an optical pickup and an optical disc device using the same, each including a laser diode, a photo-detector having a region divided into at least six photo-detection areas, and a diffraction grating disposed between the laser diode and the photo-detector and having a region divided into four areas by cross-shaped division lines. The diffraction grating divides a light beam reflected from an optical disc into four diffracted light beams. A focus error signal in accordance with a knife edge method and two kinds of tracking error signals in accordance with a push-pull method and a differential phase detection method are detected by irradiating the light beams diffracted at the areas of the diffraction grating on the detection areas of the photo-detector and/or at boundary lines therebetween, and arithmetically operating light intensity signals obtained from the detection areas of the photo-detector. As a result, there can be realized an optical pickup and an optical disc device, each of which can be matched with various optical discs different in structure by detecting a tracking error signal in accordance with the push-pull method and a tracking error signal suitable for a read only disc using only one photo-detector. Further, in the present invention, a holographic element can be used as the diffraction grating.
摘要翻译：公开了一种光拾取器和使用该光拾取器的光盘装置，每个光拾取器和光盘装置均包括激光二极管，具有被划分为至少六个光检测区域的区域的光检测器，以及设置在激光二极管和光电二极管之间的衍射光栅，并且具有通过十字形划分线划分成四个区域的区域。衍射光栅将从光盘反射的光束分成四个衍射光束。通过将衍射光栅衍射的光束照射在检测器上来检测根据刀刃法的聚焦误差信号和根据推挽法和差分相位检测方法的两种跟踪误差信号光检测器的区域和/或其间的边界线，以及从光检测器的检测区域获得的算术运算光强度信号。结果，可以实现光拾取器和光盘装置，其中的每一个可以通过根据推挽方法检测跟踪误差信号和适合的跟踪误差信号而与结构不同的各种光盘匹配对于仅使用一个光电检测器的只读光盘。此外，在本发明中，可以使用全息元件作为衍射光栅。

7. 发明授权

US5555334A Optical transmission and receiving module and optical communication system using the same 失效
标题翻译：光接收模块和光通信系统使用相同
公开(公告)号：US5555334A
公开(公告)日：1996-09-10
申请号：US319940
申请日：1994-10-07
申请人： Kunikazu Ohnishi , Masayuki Inoue , Yoshio Suzuki , Yukio Fukui
发明人： Kunikazu Ohnishi , Masayuki Inoue , Yoshio Suzuki , Yukio Fukui
IPC分类号： G02B6/28 , G02B6/42 , H04B10/40 , G02B6/36
CPC分类号： H04B10/40 , G02B6/4246 , G02B6/2804 , G02B6/4234
摘要： A bidirectional optical transmission and receiving module of a simplified structure and an optical communication system using the same. The optical transmission and receiving module includes a light emitting device and a light receiving device disposed with in a same package having an opening covered with a cover glass sheet, and a holographic diffraction grating provided on a top or lower surface of the glass sheet. In transmitting operation, a light beam emitted from the light emitting device passes through the diffraction grating to be concentrated onto an end face of an optical fiber by a lens. In receiving operation, a received light beam emanated from the end face of the optical fiber reaches the diffraction grating via the lens to be thereby diffracted. A plus-sign primary diffracted light beam resulting from the diffraction is concentrated onto a light detecting surface of the light receiving device. Signal as transmitted through the optical fiber in the form of signal light can thus be received.
摘要翻译：一种简化结构的双向光传输和接收模块以及使用其的光通信系统。光传输和接收模块包括发光器件和光接收器件，其设置在具有覆盖玻璃片的开口的相同封装中，以及设置在玻璃板的顶表面或下表面上的全息衍射光栅。在发射操作中，从发光器件发射的光束通过衍射光栅，通过透镜被集中在光纤的端面上。在接收操作中，从光纤的端面发出的接收光束经由透镜到达衍射光栅，从而衍射。由衍射产生的正符号主衍射光束集中在光接收装置的光检测表面上。因此可以接收以信号光的形式透过光纤的信号。

8. 发明授权

US5541909A Optical disc with phase pits and a reproducing apparatus for data recorded on the optical disc 失效
标题翻译：具有相位凹坑的光盘和用于记录在光盘上的数据的再现装置
公开(公告)号：US5541909A
公开(公告)日：1996-07-30
申请号：US137969
申请日：1993-10-19
申请人： Junji Nakajima , Kunikazu Ohnishi , Tooru Sasaki , Makoto Miyamoto , Masaaki Kurebayashi , Yoshio Suzuki , Masayuki Inoue , Hisamitsu Tanaka , Motoyuki Suzuki , Yukio Fukui
发明人： Junji Nakajima , Kunikazu Ohnishi , Tooru Sasaki , Makoto Miyamoto , Masaaki Kurebayashi , Yoshio Suzuki , Masayuki Inoue , Hisamitsu Tanaka , Motoyuki Suzuki , Yukio Fukui
IPC分类号： G11B7/0037 , G11B7/005 , G11B7/013 , G11B7/09 , G11B7/135 , G11B7/24 , G11B7/243
CPC分类号： G11B7/24 , G11B7/0051 , G11B7/0903 , G11B7/0909 , G11B7/0941 , G11B7/1365 , G11B7/1398 , G11B7/0945 , G11B7/24085 , G11B7/243
摘要： A masking type light control layer for decreasing its reflection factor in a high-temperature region is formed on phase pits of an optical disc, and the phase pit depth is set to a predetermined value. A light spot for reproduction is shaped to an elliptical form and two sub-flux beams on the optical disc are spaced by 5/4 track pitch from a principal flux beam in the radial direction of the optical disc. The kind of optical disc is discriminated and reproduction laser power and characteristics of an equalizer circuit are switched in accordance with the type of an optical disc. Through this, a stable servo signal detection can be ensured and repetitive reproduction characteristics can be improved.
摘要翻译：在光盘的相位凹坑上形成用于降低高温区域的反射系数的掩模型光控制层，将相位深度设定为规定值。用于再现的光斑被成形为椭圆形，并且光盘上的两个子光束在光盘的径向方向上从主通量束间隔开+ E，fra 5/4 + EE轨道间距。根据光盘的类型，鉴别出光盘的种类和再现激光功率和均衡器电路的特性。由此，能够确保稳定的伺服信号检测，能够提高重复再生特性。

9. 发明授权

US4783776A Method of recording and reproducing digital information and apparatus therefor 失效
标题翻译：记录和再现数字信息的方法及其装置
公开(公告)号：US4783776A
公开(公告)日：1988-11-08
申请号：US886413
申请日：1986-07-17
申请人： Masaji Ishigaki , Hideo Onuki , Yukio Fukui , Masayuki Inoue , Kunikazu Ohnishi
发明人： Masaji Ishigaki , Hideo Onuki , Yukio Fukui , Masayuki Inoue , Kunikazu Ohnishi
IPC分类号： G11B7/00 , G11B7/004 , G11B7/007 , G11B7/013 , G11B7/24 , G11B7/30 , G11B7/125
CPC分类号： G11B7/24085 , G11B7/004
摘要： A digital information recording and reproducing method for significantly improving the transfer rate of digital information, comprises the steps of: forming a plurality of light beam guide tracks on a recording medium capable of multiple light-wavelength recording, the tracks being spaced apart by a predetermined pitch and each of the tracks comprising a series of pre-pits disposed in a scan direction and spaced apart by an interval longer than the diameter of a spot of a light beam for use in recording and reproducing; and recording and reproducing an information bit by changing the light beam to have a different wavelength predetermined n times in a predetermined order while the light beam is scanned by one interval of the pre-pits.
摘要翻译：一种用于显着提高数字信息传送速率的数字信息记录和再现方法包括以下步骤：在能够进行多次光波长记录的记录介质上形成多个光束导轨，所述轨道间隔开预定的间距，并且每个轨道包括沿扫描方向布置的一系列预凹坑，间隔开比用于记录和再现的光束点的直径更长的间隔; 并且通过在预定凹坑的一个间隔扫描光束时以预定顺序将光束改变为具有不同波长的预定n次来记录和再现信息位。

10. 发明授权

US4768183A Optical reproducing apparatus 失效
标题翻译：光学再现装置
公开(公告)号：US4768183A
公开(公告)日：1988-08-30
申请号：US87345
申请日：1987-08-20
申请人： Kunikazu Ohnishi , Akira Arimoto , Masayuki Inoue , Yukio Fukui
发明人： Kunikazu Ohnishi , Akira Arimoto , Masayuki Inoue , Yukio Fukui
IPC分类号： G11B7/09 , G11B7/12 , G11B7/135 , G11B7/085
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/12
摘要： Light beam emitted from a laser light source is focused by an objective lens and applied in this state to an optical information recording medium. In the optical path between the laser light source and the objective lens is disposed a diffraction grating inclinedly with respect to the optical axis. This diffraction grating not only reflects the light beam emitted from the laser light source but also separates it into zero order as well as +1st order and -1st order diffracted light beams. Thus, this diffraction grating functions not only as a diffraction grating but also as a mirror. The thus-separated light beams are applied to an optical disc and the reflected light beams from the optical disc are converted to electric signals by means of a photo detector. The .+-.1st order diffracted light beams are used as track servo beams for following the track on the disc. The zero order diffracted light beam is used for reproducing information signals provided from the track on the disc. The diffraction grating has unequally spaced, curvilinear grooves in order to solve the problems of wave front aberration and light spot aberration which are induced by letting the diffraction grating function as both a diffraction grating and a mirror.
摘要翻译：从激光光源射出的光束被物镜聚焦，并以此状态应用于光信息记录媒体。在激光光源和物镜之间的光路中设置相对于光轴倾斜的衍射光栅。该衍射光栅不仅反射从激光光源发射的光束，而且将其分离为零级以及+ 1级和-1级衍射光束。因此，该衍射光栅不仅用作衍射光栅，而且还用作反射镜。这样分离的光束被施加到光盘，并且来自光盘的反射光束通过光电检测器转换成电信号。 +/- 1级衍射光束用作跟踪光盘上的轨道的轨道伺服光束。零级衍射光束用于再现从光盘上的轨道提供的信息信号。衍射光栅具有不等间距的曲线槽，以解决通过使衍射光栅作为衍射光栅和反射镜两者而引起的波前像差和光斑像差的问题。

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