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1. 发明授权

US5574881A High capacity data storage method and system using independently controlled heads and circuitry for monitoring access frequency of data records 失效
标题翻译：高容量数据存储方法和使用独立控制的磁头和电路的系统来监视数据记录的访问频率
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。

2. 发明授权

US4563760A Method of detecting light spot control signal 失效
标题翻译：光点控制信号检测方法
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。

3. 发明授权

US5109374A Small-sized optical memory device and information processing apparatus utilizing cylindrically shaped information recording medium 失效
标题翻译：小尺寸光学记忆体设备和信息处理设备利用圆柱形信息记录介质
公开(公告)号：US5109374A
公开(公告)日：1992-04-28
申请号：US406519
申请日：1989-09-13
申请人： Yoshito Tsunoda , Hiroshi Yasuoka , Takeshi Maeda
发明人： Yoshito Tsunoda , Hiroshi Yasuoka , Takeshi Maeda
IPC分类号： G11B11/10 , G11B7/00 , G11B7/0025 , G11B7/09 , G11B7/24 , G11B11/105
CPC分类号： G11B11/10584 , G11B11/10552 , G11B11/10556 , G11B11/10576 , G11B7/0025 , G11B7/24 , G11B7/24003
摘要： An optical memory device includes a cylindrically-shaped optical information recording medium and at least one optical head disposed around the information recording medium for irradiating the information recording medium with a light spot for recording or reproduction of information. The optical head has light spot moving means incorporated therein for the irradiation position of the light spot. The recording or reproduction of information is achieved by causing the light spot moving means to perform tracking control so that the light spot follows a desired track in an area within a range of movement of the light spot by the light spot moving means (or an infromation recording zone) in a state in which the relative positional relationship between the optical head and the cylindrically-shaped information recording medium in the direction parallel to the direction of the rotation axis of the information recording medium is fixed, with the optical head being not moved. The device can be constructed so that the position of either the optical head or the cylindrically-shaped information recording medium relative to the other in the direction parallel to the direction of the rotation axis of the information recording medium is mechanically moved, thereby making it possible to cahnge the information recording zone in the range of movement of the light spot by the light spot moving means to another information recording zone.

4. 发明授权

US4949331A Apparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatus 失效
标题翻译：具有校正图案和主盘切割装置的光盘存储器的装置和记录载体
公开(公告)号：US4949331A
公开(公告)日：1990-08-14
申请号：US875442
申请日：1986-06-17
申请人： Takeshi Maeda , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku
发明人： Takeshi Maeda , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku
IPC分类号： G11B7/007 , G11B7/09 , G11B7/26 , G11B11/105
CPC分类号： G11B7/261 , G11B11/10565 , G11B11/10578 , G11B11/10582 , G11B7/0901 , G11B7/0938 , G11B7/094 , G11B7/24082
摘要： A record carrier having a disc-shaped substrate and a recording layer for optically writing information therein is disclosed which includes a guide groove extended in the rotational direction of the record carrier so that a plurality of revolutions of the guide groove are spaced apart from each other in radial directions of the record carrier, and a pit pattern provided between adjacent guide grooves, at positions arranged at intervals in the above rotational direction, for detecting the deviation of a light spot from the center line between adjacent guide grooves. The recording/reproducing operation for this record carrier is performed in such a manner that the first tracking error signal is detected from diffracted light from the guide groove, the second tracking error signal is detected from the pit pattern, and information is recorded in and reproduced from a land formed between adjacent guide grooves in a state that a tracking operation is performed using the first and second tracking error signals. The second tracking error signal detected from the pit pattern is not affected by the tilting of the record carrier and the movement of the light spot. When a tracking signal obtained by adding the first and second tracking error signals to each other, is used in a closed-loop tracking system, a stable tracking operation can be performed. The polarity of the pit pattern is reversed on every track, and hence a polarity pit having a depth of .lambda./4 (where .lambda. indicates the wavelength of a reproducing light beam) is provided in the record carrier, to reverse the polarity of the second tracking signal on every track on the basis of a signal from the polarity pit.
摘要翻译：公开了一种具有盘形基板和用于在其中光学地写入信息的记录层的记录载体，其包括沿着记录载体的旋转方向延伸的引导槽，使得引导槽的多个转动彼此间隔开在记录载体的径向方向上设置的凹坑图案，以及设置在相邻引导槽之间的位置，在沿上述旋转方向间隔设置的位置处，用于检测光点与相邻引导槽之间的中心线的偏离。该记录载体的记录/再现操作以从导槽的衍射光检测第一跟踪误差信号，从凹坑图案检测第二跟踪误差信号并将信息记录并再现在使用第一和第二跟踪误差信号执行跟踪操作的状态下从形成在相邻引导槽之间的区域。从凹坑图案检测到的第二跟踪误差信号不受记录载体的倾斜和光点的移动的影响。当在闭环跟踪系统中使用通过将第一和第二跟踪误差信号彼此相加而获得的跟踪信号时，可以执行稳定的跟踪操作。凹坑图案的极性在每个轨道上反转，因此在记录载体中提供具有λ/ 4深度（其中λ表示再现光束的波长）的极性凹坑，以反转第二基于来自极性凹坑的信号在每个轨道上跟踪信号。

5. 发明授权

US4802153A Optical information processor and method for accessing rotating record carrier utilizing acousto-optic light deflector including holding a focus error signal during track jumping 失效
标题翻译：光信息处理器和利用声光偏转器访问旋转记录载体的方法，包括在轨道跳跃期间保持聚焦误差信号
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。

6. 发明授权

US4742218A Focus error detection apparatus utilizing focusing an front and rear sides of focal planes 失效
标题翻译：利用聚焦平面的前后侧的聚焦误差检测装置
公开(公告)号：US4742218A
公开(公告)日：1988-05-03
申请号：US828354
申请日：1986-02-11
申请人： Shigeru Nakamura , Toshimasa Kamisada , Akira Saito , Takeshi Maeda , Yoshito Tsunoda , Toshimitsu Kaku , Tuyoshi Kato , Masaaki Hishiki , Masateru Watanabe
发明人： Shigeru Nakamura , Toshimasa Kamisada , Akira Saito , Takeshi Maeda , Yoshito Tsunoda , Toshimitsu Kaku , Tuyoshi Kato , Masaaki Hishiki , Masateru Watanabe
IPC分类号： G11B7/09 , G11B11/105 , G01J1/20 , G11B5/09
CPC分类号： G11B7/0912 , G11B11/10541 , G11B11/10576
摘要： A focus error detection apparatus and an optical disk apparatus comprising a focusing lens for focusing reflected light coming from a light reflecting surface which is to be adjusted at the focal point of a projected light beam; a beam splitter means for dividing the output light of said focusing lens into a first and a second focused light beam; a first and a second photo-detector disposed respectively on the optical paths of said first and said second focused light beam, one of which is located behind the convergence point of said first focused light beam and the other of which is located before the convergence point of said second focused light beam, each of them generating outputs proportional to the amount of light within a predetermined region of the received light image, when it varies so that it is enlarged; and a circuit generating a focus error signal by using the difference between the outputs of said two photo-detectors.
摘要翻译：一种聚焦误差检测装置和光盘装置，包括：聚焦透镜，用于聚焦来自被投影光束的焦点处被调节的光反射表面的反射光; 分束器装置，用于将所述聚焦透镜的输出光分成第一和第二聚焦光束; 分别设置在所述第一和第二聚焦光束的光路上的第一和第二光电检测器，其中一个位于所述第一聚焦光束的会聚点之后，另一个位于会聚点之前所述第二聚焦光束中的每一个产生与所接收的光图像的预定区域内的光量成比例的输出，当其变化使得其被放大时; 以及通过使用所述两个光电检测器的输出之间的差产生聚焦误差信号的电路。

7. 发明授权

US4450547A Focal position detecting optical apparatus 失效
标题翻译：焦点位置检测光学装置
公开(公告)号：US4450547A
公开(公告)日：1984-05-22
申请号：US313218
申请日：1981-10-20
申请人： Shigeru Nakamura , Takeshi Maeda , Toshimitsu Kaku , Yoshito Tsunoda , Wasao Takasugi , Tokuya Kaneda
发明人： Shigeru Nakamura , Takeshi Maeda , Toshimitsu Kaku , Yoshito Tsunoda , Wasao Takasugi , Tokuya Kaneda
IPC分类号： G02B7/28 , G02B27/40 , G11B7/09 , G11B7/135 , G11B7/1381 , G11B7/22 , G11B7/00
CPC分类号： G11B7/1381 , G02B27/40 , G11B7/0908 , G11B7/0916 , G11B7/22
摘要： A focal position detecting optical apparatus wherein a light beam focused by a first optical system is irradiated on an object to be illuminated, focal point images are formed at two foci spaced apart from each other by a cylindrical lens disposed in a path of light beam reflected from the object, and a shielding element having a tip edge making an angle of approximately 45.degree. with an operating axis of the cylindrical lens is inserted at a site between the two foci and at which the light beam has a circular cross section to extract a portion of the light beam travelling between the two foci. The extracted portion is detected by two photodetectors disposed symmetrically with an axis lying in substantially the same direction as the tip edge, and the difference between outputs of the two photodetectors is produced for detection of an actual focal position of the first optical system.
摘要翻译：一种焦点位置检测光学装置，其中由第一光学系统聚焦的光束照射在待照射的物体上，焦点图像通过设置在反射光束的路径中的柱面透镜彼此间隔开地形成在两个焦点处并且具有与柱面透镜的操作轴线成约45度的尖端边缘的屏蔽元件插入在两个焦点之间的位置处，并且光束具有圆形横截面以提取光束在两个焦点之间行进的部分。提取部分由两个光电检测器检测，两个光电检测器以与尖端边缘基本相同的轴线对称布置，并且产生两个光电检测器的输出之间的差异，用于检测第一光学系统的实际焦点位置。

8. 发明授权

US4085423A Information reproducing apparatus with plural beam readout 失效
标题翻译：具有多个光束读出的信息再现装置
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。

9. 发明授权

US5084860A Apparatus for optical disc memory with correction pattern and master disc cutting apparatus 失效
标题翻译：具有校正图案和主光盘切割设备的光盘存储器的设备
公开(公告)号：US5084860A
公开(公告)日：1992-01-28
申请号：US551025
申请日：1990-07-11
申请人： Takeshi Maeda , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku
发明人： Takeshi Maeda , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku
IPC分类号： G11B7/007 , G11B7/09 , G11B7/26 , G11B11/105
CPC分类号： G11B7/261 , G11B11/10565 , G11B11/10578 , G11B11/10582 , G11B7/0901 , G11B7/0938 , G11B7/094 , G11B7/24082
摘要： A record carrier having a disc-shaped substrate and a recording layer for optically writing information therein is disclosed which includes a guide groove extended in the rotational direction of the record carrier so that a plurality of revolutions of the guide groove are spaced apart from each other in radial directions of the record carrier, and a pit pattern provided between adjacent guide grooves, at positions arranged at intervals in the above rotational direction, for detecting the deviation of a light spot from the center line between adjacent guide grooves. The recording/reproducing operation for this record carrier is performed in such a manner that the first tracking error signal is detected from diffracted light from the guide groove, the second tracking error signal is detected from the pit pattern, and information is recorded in and reproduced from a land formed between adjacent guide grooves in a state that a tracking operation is performed using the first and second tracking error signals. The second tracking error signal detected from the pit pattern is not affected by the tilting of the record carrier and the movement of the light spot. When a tracking signal obtained by adding the first and second tracking error signals to each other, is used in a closed-loop tracking system, a stable tracking operation can be performed. The polarity of the pit pattern is reversed on every track, and hence a polarity pit having a depth of .lambda./4 (where .lambda. indicates the wavelength of a reproducing light beam) is provided in the record carrier, to reverse the polarity of the second tracking signal on every track on the basis of a signal from the polarity pit.

10. 发明授权

US5073880A Information recording/reproducing method and apparatus 失效
标题翻译：信息记录/再现方法和装置
公开(公告)号：US5073880A
公开(公告)日：1991-12-17
申请号：US285584
申请日：1988-12-16
申请人： Takeshi Maeda , Yoshito Tsunoda
发明人： Takeshi Maeda , Yoshito Tsunoda
IPC分类号： G11B7/09 , G11B11/105 , G11B21/10
CPC分类号： G11B7/0938 , G11B11/10565 , G11B11/10578 , G11B21/106
摘要： Data recording and/or reproduction on or from a recording medium on which tracking signal detection marks are intermittently provided along each track in a pattern wobbling alternately across the track center line with a very small lateral displacement therefrom, wherein data recording area is defined between the tracking signal detection mark. A servo control system for controlling a write/read light spot so as to follow the track with the aid of a tracking signal obtained by detecting the tracking signal detection marks is provided with a low-pass filter circuit having a cut-off frequency lower than the frequency at which the tracking signal detection marks are detected. A data is recorded or reproduced on or from the recording areas of the recording medium while following the track under the control of the servo system. A blank area where data recording is inhibited is provided between the data recording area and the tracking signal detecting mark (prepit) to suppress interference to the data. A particular access prepit pattern which allows track addresses to be at least approximately detected upon passing of the light spot over the track of the recording medium is previously provided together with synchronizing marks in a synchronizing area.

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