公开(公告)号：US4802153A

公开(公告)日：1989-01-31

申请号：US842200

申请日：1986-03-21

申请人： Keiji Kataoka ,  Takeshi Maeda ,  Yoshito Tsunoda

发明人： Keiji Kataoka ,  Takeshi Maeda ,  Yoshito Tsunoda

IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B7/12

CPC分类号： G11B7/08558 ,  G11B7/08511 ,  G11B7/08552 ,  G11B7/1245

摘要： Accessing method and an apparatus therefor in an optical disc apparatus having an acousto-optic light deflector for deflecting a light spot to a different address or different track on an optical disc are disclosed. An auto-focus signal is held at a constant level for a predetermined period when the acousto-optic light deflector deflects the light spot. Thus, an affect caused by coexistence of a plurality of acoustic frequencies in the acoustic-optic device is eliminated and fast light accessing is attained.

摘要翻译： 公开了具有用于将光点偏转到光盘上的不同地址或不同轨道的声光偏转器的光盘装置中的访问方法及其装置。 当声光偏转器偏转光斑时，自动对焦信号被保持在一定的时间段上。 因此，消除了在声光装置中多个声频共存引起的影响，并且实现了快速的光访问。

公开(公告)号：US4085423A

公开(公告)日：1978-04-18

申请号：US691099

申请日：1976-05-28

申请人： Yoshito Tsunoda ,  Takeshi Maeda ,  Yoshitada Oshida

发明人： Yoshito Tsunoda ,  Takeshi Maeda ,  Yoshitada Oshida

IPC分类号： H04N5/85 ,  G02B27/00 ,  G02B27/09 ,  G11B7/00 ,  G11B7/005 ,  G11B7/09 ,  G11B7/12

CPC分类号： G11B7/0903 ,  G11B7/12

摘要： Information reproducing apparatus for producing information on an optical information recording medium includes a first light source which gives forth a beam of light of a wavelength .lambda..sub.1 and a second light source which gives forth a beam of light of a wavelength .lambda..sub.2 different from the wavelength .lambda..sub.1. An optical element selectively reflects the light of the wavelength .lambda..sub.1 and selectively transmits the light of the wavelength .lambda..sub.2. The first and second light sources, the optical element and the recording medium are positionally arranged so that the light beams from the first and second light sources may be projected on a predetermined position of the recording medium and a substantially identical position to the predetermined position through the optical element, respectively, and the arrangement of these elements is also such that the respective projected light beams may fall on the optical element after being reflected by the recording medium. First and second photodetectors detect light reflected from the optical element and light transmitted light through the same in accordance with the wavelength of the light beams falling on the optical element, respectively, and develop focusing and tracking control signals.

摘要翻译： 用于在光学信息记录介质上产生信息的信息再现装置包括：发出波长为λ1的光束的第一光源和产生波长为λ2的不同波长的光束的第二光源 光学元件选择性地反射波长λ1的光并选择性地透射波长λ2的光。第一和第二光源，光学元件和记录介质被位置地布置成使得来自 第一和第二光源可以分别投影在记录介质的预定位置上，并且通过光学元件分别与预定位置基本相同的位置，并且这些元件的布置也使得各个投影光束可能落在 被记录介质反射后的光学元件。 第一和第二光电检测器分别检测从光学元件反射的光并根据分别落在光学元件上的光束的波长来透过光，并且形成聚焦和跟踪控制信号。

公开(公告)号：US4815058A

公开(公告)日：1989-03-21

申请号：US920423

申请日：1986-10-20

申请人： Shigeru Nakamura ,  Yoshito Tsunoda

发明人： Shigeru Nakamura ,  Yoshito Tsunoda

IPC分类号： G06K15/12 ,  G11B7/09 ,  G11B7/125 ,  H04N1/40 ,  H04N1/405 ,  G11B7/00

CPC分类号： H04N1/40037 ,  G06K15/1204 ,  G11B7/0908 ,  G11B7/126

摘要： An optical information processing device comprises a semiconductor laser, and an optical system including an imaging lens having chromatic aberration for focusing laser light emitted by the semiconductor laser in the form of a spot on an information recording surface. The imaging lens serves for focusing the laser light at different positions along the optical axis for different wavelengths. The information processing device also includes an apparatus for producing relative displacements between the spot and the information recording surface, and an apparatus for varying the wavelength of the light emitted by the semiconductor laser with the device being characterized in that the imaging position of the spot is displaced along the optical axis depending on variations in wavelength of the light emitted by the semiconductor laser and the chromatic aberration of the imaging lens. The focusing control can be effected by driving the wavelength changing apparatus by using focal point detection signals. Further, it is possible to effect multigrade recording by driving the wavelength changing apparatus by multigrade information signals.

摘要翻译： 光学信息处理装置包括半导体激光器和包括具有色差的成像透镜的光学系统，用于将由半导体激光器发射的激光以点的形式聚焦在信息记录表面上。 成像透镜用于将激光沿着不同波长的光轴聚焦在不同位置处。 所述信息处理装置还包括用于产生所述光斑和所述信息记录表面之间的相对位移的装置，以及用于改变所述半导体激光器发射的光的波长的装置，其特征在于，所述光点的成像位置为 取决于由半导体激光器发射的光的波长的变化和成像透镜的色差而沿着光轴移位。 可以通过使用焦点检测信号驱动波长改变装置来实现聚焦控制。 此外，可以通过多波段信息信号驱动波长改变装置来实现多级记录。

公开(公告)号：US4554652A

公开(公告)日：1985-11-19

申请号：US490165

申请日：1983-04-29

申请人： Takeshi Maeda ,  Yoshito Tsunoda ,  Takakazu Huno ,  Masahiro Takasago ,  Yasumitsu Mizoguchi

发明人： Takeshi Maeda ,  Yoshito Tsunoda ,  Takakazu Huno ,  Masahiro Takasago ,  Yasumitsu Mizoguchi

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/09 ,  G11B7/125 ,  G11B19/04 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/36

CPC分类号： G11B27/36 ,  G11B19/04 ,  G11B20/10 ,  G11B20/1217 ,  G11B20/18 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B2220/2537

摘要： An optical information processor records predetermined information along a track on a recording medium through the irradiation of a light beam intensity-modulated in accordance with the predetermined information. A tracking signal obtained when the light beam traces the track, is compared with first and second preset values which define a predetermined range. When the tracking signal departs from the predetermined range, the intensity modulation of the light beam or the recording operation is stopped, thereby preventing data destruction which otherwise occurs due to the digression of the light beam from the track.

摘要翻译： 光学信息处理器通过照射根据预定信息强度调制的光束，沿着记录介质上的轨道记录预定信息。 当光束跟踪轨道时获得的跟踪信号与限定预定范围的第一和第二预设值进行比较。 当跟踪信号偏离预定范围时，光束的强度调制或记录操作停止，从而防止由于来自轨迹的光束的分离而出现的数据破坏。

公开(公告)号：US4163149A

公开(公告)日：1979-07-31

申请号：US819861

申请日：1977-07-28

申请人： Susumu Sawano ,  Yoshito Tsunoda ,  Takeshi Maeda

发明人： Susumu Sawano ,  Yoshito Tsunoda ,  Takeshi Maeda

IPC分类号： G11B7/09 ,  G01J1/36

CPC分类号： G11B7/0909 ,  G11B7/094

摘要： In automatic focusing apparatus comprising a laser source, optical means for causing a light beam from the laser source to follow an information track on an information recorded medium, a photodetector which consists of quartered photodetection portions and to which a reflected light beam from the information track is guided through a cylindrical lens, and means for controlling the focusing of the light beam by the use of an error signal obtained from the shape and the intensity distribution of a light spot on the four photodetection portions, the improvement wherein a compensation signal is created from the absolute value of a difference between outputs from one set of the opposing photodetection portions and the absolute value of a difference between outputs from the other set of the opposing photodetection portions, to compensate for a disturbance ascribable to a movement of the light spot on the photodetector which arises in correspondence with the error signal.

摘要翻译： 在包括激光源的自动聚焦装置中，用于使来自激光源的光束跟随信息记录介质上的信息轨道的光学装置，由四分之一的光电检测部分组成的光电检测器，并且来自信息轨道的反射光束 被引导通过柱面透镜，以及用于通过使用从四个光电检测部分上的光点的形状和强度分布获得的误差信号来控制光束的聚焦的装置，其中产生补偿信号的改进 来自一组相对光检测部分的输出之间的差的绝对值和来自相对光检测部分的另一组的输出之间的差的绝对值，以补偿由于光斑运动引起的干扰 该光检测器与误差信号相对应地产生。

公开(公告)号：US4970707A

公开(公告)日：1990-11-13

申请号：US239389

申请日：1988-09-01

申请人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

发明人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

IPC分类号： G11B7/003 ,  G11B7/09

CPC分类号： G11B7/09 ,  G11B7/0031 ,  G11B7/0925

摘要： An optical tape apparatus having improved focus and tracking control. An optical head records, reproduces, or rewrites data on an optical tape by helically scanning the tape with a laser beam. A guide plate is disposed between the optical head and the tape to prevent the beam from becoming unfocused due to fluctuation of the tape cuased by an air film between the optical head and the tape. The optical head contains a semiconductor laser and an optical system exhibiting chromatic aberration for directing the laser beam onto the tape. The optical system includes a condenser lens for focusing the beam onto the tape. Fine focus control is achieved by changing the wavelength of the laser beam by directing part of the beam reflected from the tape back to the laser, thereby changing the focal point of the beam by virtue of the chromatic aberration of the optical system. Coarse focus control is achieved by mounting the condenser lens on a piezoelectric actuator which moves the consenser lens to focus the beam onto the tape. A recording head for recording timing marks and tracking signals on the tape is disposed in advance of the optical head. A reading head reads the timing marks and the optical head reads the tracking signals. The timing marks and tracking signals are used to control the operation of the apparatus such that the tape is transported with a constant speed and data on diagonal signal tracks on the tape is accurately recorded, reproduced, or rewritten.

摘要翻译： 具有改进的聚焦和跟踪控制的光带装置。 光学头通过用激光束螺旋扫描磁带来记录，再现或重写光学带上的数据。 引导板设置在光头和带之间，以防止由于光头和带之间的空气膜带来的带的波动而导致光束不聚焦。 光头包含半导体激光器和具有用于将激光束引导到带上的色差的光学系统。 光学系统包括用于将光束聚焦到胶带上的聚光透镜。 通过将从带反射的光束的一部分引回到激光器来改变激光束的波长，从而通过光学系统的色差来改变光束的焦点来实现精细对焦控制。 通过将聚光透镜安装在压电致动器上来实现粗调焦控制，该压电致动器移动辅助透镜以将光束聚焦到带上。 在光学头之前设置用于在带上记录定时标记和跟踪信号的记录头。 读头读取定时标记，光头读取跟踪信号。 定时标记和跟踪信号用于控制装置的操作，使得磁带以恒定速度传送，并且磁带上对角线信号轨道上的数据被精确地记录，再现或重写。

公开(公告)号：US5574881A

公开(公告)日：1996-11-12

申请号：US511779

申请日：1995-08-10

申请人： Hiroshi Yasuoka ,  Yoshito Tsunoda ,  Takeshi Maeda ,  Yoshihisa Kamo ,  Hiromichi Fujisawa ,  Zenji Tsutsumi ,  Shunichi Torii

发明人： Hiroshi Yasuoka ,  Yoshito Tsunoda ,  Takeshi Maeda ,  Yoshihisa Kamo ,  Hiromichi Fujisawa ,  Zenji Tsutsumi ,  Shunichi Torii

IPC分类号： G11B25/04 ,  G06F3/06 ,  G06F12/00 ,  G11B7/00 ,  G11B7/004 ,  G11B19/20 ,  G11B21/00 ,  G11B27/10 ,  G11B27/36 ,  G06F13/00 ,  G06F12/12 ,  G11B17/22

CPC分类号： G11B19/20 ,  G06F3/0601 ,  G11B21/00 ,  G11B27/105 ,  G11B5/5578 ,  G06F2003/0692 ,  G11B2220/20 ,  G11B2220/41 ,  G11B27/36

摘要： A fast access high capacity data storage system and method are disclosed, the data storage system including a disk-based storage system employing a plurality of storage surfaces. Selected storage surfaces have a plurality of independently controlled data access heads in data communication therewith, and circuitry is provided for allowing concurrent data transfers through the plurality of data access heads. Performance is further improved by monitoring frequently accessed data records and transferring them to a copy recording surface or recording surfaces less frequently used, and by moving a data access head of the plurality of data access heads to other recording surfaces to decrease access bottlenecks. The storage system further includes circuitry for averaging at least one of record length data, transfer timing data, access timing data and address data.

摘要翻译： 公开了一种快速访问高容量数据存储系统和方法，该数据存储系统包括采用多个存储表面的基于盘的存储系统。 所选择的存储表面具有与其数据通信的多个独立控制的数据访问头，并且提供电路以允许通过多个数据访问头并发数据传输。 通过监视频繁访问的数据记录并将其传送到复制记录表面或不太频繁使用的记录表面，并通过将多个数据访问头的数据访问头移动到其他记录表面来减少访问瓶颈，进一步提高了性能。 存储系统还包括用于平均记录长度数据，传送定时数据，访问定时数据和地址数据中的至少一个的电路。

公开(公告)号：US4563760A

公开(公告)日：1986-01-07

申请号：US401020

申请日：1982-07-22

申请人： Takeshi Maeda ,  Kazuo Shigematsu ,  Masahiro Takasago ,  Yasumitsu Mizoguchi ,  Zenji Tsutsumi ,  Yoshito Tsunoda ,  Motoo Uno

发明人： Takeshi Maeda ,  Kazuo Shigematsu ,  Masahiro Takasago ,  Yasumitsu Mizoguchi ,  Zenji Tsutsumi ,  Yoshito Tsunoda ,  Motoo Uno

IPC分类号： G02B7/28 ,  G11B7/08 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/08 ,  G11B7/09 ,  G11B7/0901 ,  G11B7/0941

摘要： A method of detecting a light spot control signal is disclosed in which, when information is reproduced from an optical disk for optically recording information, a signal level obtained at a high-reflectivity portion of the optical disk is taken out of a signal reproduced from the optical disk, and is used as a control signal, which controls a light spot so that it tracks information stored in the optical disk.

摘要翻译： 公开了一种检测光点控制信号的方法，其中当从用于光学记录信息的光盘再现信息时，从从光盘中再现的信号中取出在光盘的高反射率部分获得的信号电平 光盘，并且被用作控制信号，其控制光点，使得其跟踪存储在光盘中的信息。

公开(公告)号：US4550394A

公开(公告)日：1985-10-29

申请号：US479894

申请日：1983-03-29

申请人： Takeshi Maeda ,  Masahiro Takasago ,  Yoshito Tsunoda

发明人： Takeshi Maeda ,  Masahiro Takasago ,  Yoshito Tsunoda

IPC分类号： G11B7/013 ,  G11B7/09 ,  G11B27/36 ,  G11B7/00 ,  G11B21/10

CPC分类号： G11B7/24085 ,  G11B27/36 ,  G11B7/0903

摘要： An optical information recording system in which predetermined information is recorded by a first laser light beam on a recording medium along a guiding groove previously formed in the recording medium. Second and third laser light beams are projected onto the recording medium at positions deviated from the center of the guiding groove and preceding and succeeding to the first laser beam. A pattern in which no mutual interference of information to be recorded by the first laser beam is present is detected from an information signal which modulates the intensity of the first laser light beam. A difference is determined between the quantity of light reflected upon illumination of the recorded pattern by the second laser beam chronographically succeeding to the first laser beam and the quantity of light reflected upon illumination by the third laser beam. The position of the first laser beam is controlled on the basis of the thus determined difference for effecting an information tracking operation with improved accuracy.

摘要翻译： 一种光学信息记录系统，其中通过预先形成在记录介质中的导向槽，通过第一激光束将预定信息记录在记录介质上。 第二和第三激光束在与引导槽的中心偏离并在第一激光束之前和之后的位置处被投影到记录介质上。 从调制第一激光的强度的信息信号中检测不存在由第一激光束记录的信息的相互干扰的图案。 在通过第一激光束的时间计时的第二激光束照射记录图案反射的光量与由第三激光束照射反射的光量之间确定差异。 基于如此确定的差异来控制第一激光束的位置，以提高准确度进行信息跟踪操作。

公开(公告)号：US4523089A

公开(公告)日：1985-06-11

申请号：US411809

申请日：1982-08-26

申请人： Takeshi Maeda ,  Yasumitsu Mizoguchi ,  Masahiro Takasago ,  Tokuya Kaneda ,  Yoshito Tsunoda

发明人： Takeshi Maeda ,  Yasumitsu Mizoguchi ,  Masahiro Takasago ,  Tokuya Kaneda ,  Yoshito Tsunoda

IPC分类号： G11B7/125 ,  H01S5/068 ,  H01S5/0683 ,  G01J1/32 ,  H01S3/10

CPC分类号： H01S5/06835

摘要： A driving circuit for driving a semiconductor laser by a driving signal containing a pulse signal representing given information and superposed on a DC bias signal includes means for monitoring intensity of laser light emitted when the DC bias is applied, and means for monitoring the intensity of laser light emitted when the pulse signal is applied. The DC bias signal and the pulse signal are varied in dependence on the result of comparisons between the outputs of the monitoring means and respective predetermined reference values.

摘要翻译： 用于通过包含表示给定信息并叠加在DC偏置信号上的脉冲信号的驱动信号驱动半导体激光器的驱动电路包括用于监视施加DC偏压时发射的激光的强度的装置，以及用于监视激光强度的装置 当施加脉冲信号时发出光。 DC偏置信号和脉冲信号根据监视装置的输出与相应的预定参考值之间的比较结果而变化。