公开(公告)号：US6088307A

公开(公告)日：2000-07-11

申请号：US40405

申请日：1998-03-18

申请人： Tetsuya Fushimi ,  Toshimitsu Kaku ,  Tetsuya Ikeda ,  Toshiaki Ishibashi ,  Kazuo Shigematsu

发明人： Tetsuya Fushimi ,  Toshimitsu Kaku ,  Tetsuya Ikeda ,  Toshiaki Ishibashi ,  Kazuo Shigematsu

IPC分类号： G11B7/0037 ,  G11B7/007 ,  G11B7/013 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/19 ,  G11B27/30 ,  G11B7/00

CPC分类号： G11B27/3027 ,  G11B20/10 ,  G11B20/1403 ,  G11B27/19 ,  G11B7/00375 ,  G11B20/1217 ,  G11B20/1258 ,  G11B7/24082 ,  G11B7/24085

摘要： In a wobble signal detecting circuit provided by the present invention, a wobble signal is converted into binary data before being supplied to a PLL circuit by way of a polarity switching circuit and a clock switching circuit. The PLL circuit outputs a recording/playback timing generation clock signal. The frequency of the recording/playback timing generation clock signal is divided by a frequency dividing circuit before being fed back to the PLL circuit. A difference in phase between the wobble signal and the feedback signal is detected by a phase inversion detecting circuit and, if the difference in phase exceeds a phase difference determined in advance, the phase inversion detecting circuit generates a polarity switching signal for switching the polarity of the wobble signal. The polarity switching signal is used to invert the polarity of the polarity switching circuit.

摘要翻译： 在本发明提供的摆动信号检测电路中，通过极性切换电路和时钟切换电路将摆动信号转换成二进制数据，然后再提供给PLL电路。 PLL电路输出记录/重放定时产生时钟信号。 在反馈到PLL电路之前，记录/重放定时产生时钟信号的频率被分频电路分压。 摆动信号和反馈信号之间的相位差由相位反转检测电路检测，如果相位差超过预先确定的相位差，则相位反转检测电路产生极性切换信号，用于切换 摆动信号。 极性切换信号用于反转极性切换电路的极性。

公开(公告)号：US4656618A

公开(公告)日：1987-04-07

申请号：US639004

申请日：1984-08-09

申请人： Toshimitsu Kaku ,  Keiji Kataoka ,  Yoshito Tsunoda ,  Kazuo Shigematsu

发明人： Toshimitsu Kaku ,  Keiji Kataoka ,  Yoshito Tsunoda ,  Kazuo Shigematsu

IPC分类号： G11B7/004 ,  G11B7/09 ,  G11B7/12 ,  G11B7/125 ,  G11B27/36

CPC分类号： G11B27/36 ,  G11B7/004 ,  G11B7/12 ,  G11B7/128 ,  G11B7/0909

摘要： In an optical information recording and reproducing apparatus having a laser light source and an optical system so that a beam from the laser light source is irradiated through the optical system on an information recording medium to record and reproduce information, an accousto-optic modulator is disposed in the optical system for receiving the beam from the laser light source, and a modulation unit is provided which comprises an oscillator for generating a plurality of signals at different frequencies, a modulator for modulating the outputs of the oscillator and an adder for adding together the outputs of the modulator.

摘要翻译： 在具有激光光源和光学系统的光学信息记录和再现装置中，使得来自激光光源的光束通过光学系统照射在信息记录介质上以记录和再现信息，设置声光调制器 在用于从激光光源接收光束的光学系统中，提供了一种调制单元，其包括用于产生不同频率的多个信号的振荡器，用于调制振荡器的输出的调制器和用于将 调制器的输出。

公开(公告)号：US4806952A

公开(公告)日：1989-02-21

申请号：US69177

申请日：1987-07-02

申请人： Tetsuya Nishida ,  Motoyasu Terao ,  Yasushi Miyauchi ,  Shinkichi Horigome ,  Kazuo Shigematsu ,  Norio Ohta ,  Toshimitsu Kaku ,  Masahiro Ojima

发明人： Tetsuya Nishida ,  Motoyasu Terao ,  Yasushi Miyauchi ,  Shinkichi Horigome ,  Kazuo Shigematsu ,  Norio Ohta ,  Toshimitsu Kaku ,  Masahiro Ojima

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/0045 ,  G11B7/243 ,  G01D9/42

CPC分类号： G11B7/243 ,  G11B7/0037 ,  G11B2007/24312 ,  G11B2007/24316 ,  G11B7/00454 ,  G11B7/2531 ,  G11B7/257

摘要： In an information recording apparatus according to this invention, since it is not necessary to dispose any differential circuit, which was required heretofore, it is possible to fabricate it with a low cost and its error rate is also very small.Furthermore, since the mean reflectivity on the recording track does almost not vary by the fact that information is recorded there, no tracking off-set or focusing off-set is produced. Thus effects of this invention are remarkable.

摘要翻译： 在根据本发明的信息记录装置中，由于不需要设置迄今为止所需的差分电路，所以可以以低成本制造差错电路，并且其误码率也非常小。 此外，由于记录轨道上的平均反射率几乎不会因信息被记录在那里而变化，所以不产生跟踪偏移或聚焦偏移。 因此，本发明的效果是显着的。

公开(公告)号：US4835759A

公开(公告)日：1989-05-30

申请号：US878436

申请日：1986-06-25

申请人： Atsushi Saito ,  Takeshi Maeda ,  Hisataka Sugiyama ,  Kazuo Shigematsu ,  Wasao Takasugi

发明人： Atsushi Saito ,  Takeshi Maeda ,  Hisataka Sugiyama ,  Kazuo Shigematsu ,  Wasao Takasugi

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/013 ,  G11B20/10 ,  G11B20/14 ,  G11B27/30

CPC分类号： G11B20/10222 ,  G11B20/10009 ,  G11B20/1403 ,  G11B27/3027 ,  G11B7/004 ,  G11B7/24085

摘要： When recording domains are formed locally on a recording medium and information is recorded and reproduced by using rise and fall in a reproduced waveform obtained from the recording domains as data, timing patterns indicating start of demodulation are recorded for the lead-edge and the tail-edge of the recording domains, respectively; time interval between the timing signal for starting demodulation detected from the rise in the reproduced waveform and the timing signal for starting demodulation detected from the fall in the reproduced waveform is detected; time shifts of the signals detected from the lead-edge and the tail-edge of the recording domains succeeding the timing patterns for starting demodulation by using the time interval thus detected; and the information is stably detected as time sequential data having no jitter.

摘要翻译： 当在记录介质上本地形成记录域时，通过使用从记录域获得的再现波形中的上升和下降来记录和再现信息作为数据，记录指示开始解调的定时模式用于前沿和尾部， 分别记录域的边缘; 检测从再生波形的上升检测到的开始解调用定时信号与从再现波形的下降检测到的开始解调用定时信号之间的时间间隔; 通过使用这样检测的时间间隔，从用于开始解调的定时模式的记录区域的前沿和尾边检测到的信号的时移; 并且信息被稳定地检测为没有抖动的时序数据。

公开(公告)号：US4731771A

公开(公告)日：1988-03-15

申请号：US829024

申请日：1986-02-13

申请人： Takeshi Maeda ,  Kazuo Shigematsu ,  Shigeru Nakamura ,  Yoshito Tsunoda ,  Masuo Kasai

发明人： Takeshi Maeda ,  Kazuo Shigematsu ,  Shigeru Nakamura ,  Yoshito Tsunoda ,  Masuo Kasai

IPC分类号： G11B7/085 ,  G11B7/09

CPC分类号： G11B7/08529 ,  G11B7/08517 ,  G11B7/0901

摘要： This invention relates to a track setting method for a tracking servo system in an optical disk device and a device therefor. According to this invention the track passage velocity when the light spot moves across the track is detected and setting of the light spot onto the track is performed under the condition that the passage velocity thus detected is lower than a predetermined velocity. In the case where the passage velocity is greater than the predetermined velocity, the light spot is forced to move so that the passage velocity is lower than the predetermined velocity and the light spot is set up thereafter.

摘要翻译： 本发明涉及一种用于光盘装置中的跟踪伺服系统的轨道设置方法及其装置。 根据本发明，检测到光点移动通过轨迹时的轨迹通过速度，并且在由此检测到的通过速度低于预定速度的条件下执行光点到轨道上的设置。 在通过速度大于预定速度的情况下，迫使光斑移动，使得通过速度低于预定速度，此后设定光斑。

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：US4364118A

公开(公告)日：1982-12-14

申请号：US160199

申请日：1980-06-17

申请人： Takeshi Maeda ,  Kazuo Shigematsu ,  Seiji Yonezawa

发明人： Takeshi Maeda ,  Kazuo Shigematsu ,  Seiji Yonezawa

IPC分类号： G11B7/004 ,  G11B7/09 ,  G11B7/12 ,  G11B20/14 ,  G11B7/00 ,  G11B21/04

CPC分类号： G11B7/004 ,  G11B20/1426 ,  G11B7/0938 ,  G11B7/12

摘要： An optical disk for accumulating information in the form in which an information signal can be optically read, wherein to the end of additionally recording information, a line of pits are arrayed at periodical intervals on an information recording carrier and are recorded in a manner to minutely wobble in the rotating direction of the disk at a fixed period.

摘要翻译： 一种用于以可光学读取信息信号的形式累积信息的光盘，其中，在附加地记录信息的结束时，在信息记录载体上以周期性间隔排列凹坑线，并且以微小的方式记录 以固定的时间在盘的旋转方向摆动。

公开(公告)号：US4241240A

公开(公告)日：1980-12-23

申请号：US954869

申请日：1978-10-26

申请人： Kazuo Shigematsu ,  Keizo Kato ,  Toshimitsu Miyauchi ,  Seiji Yonezawa ,  Fumiyuki Inose ,  Kimio Tatsuno ,  Takeshi Maeda

发明人： Kazuo Shigematsu ,  Keizo Kato ,  Toshimitsu Miyauchi ,  Seiji Yonezawa ,  Fumiyuki Inose ,  Kimio Tatsuno ,  Takeshi Maeda

IPC分类号： H04N5/85 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/095 ,  G11B17/00 ,  G11B27/02 ,  H04N5/76 ,  G11B7/12

CPC分类号： G11B17/005 ,  G11B27/02 ,  G11B7/0953

摘要： An optical information recording and reproducing apparatus is disclosed in which a predetermined signal is recorded on a track of a rotating recording medium by a recording light beam and the recorded information is reproduced by a reproducing light beam. The information recorded on the last record track is reproduced by the recording beam and the reproducing beam and radiating position of the recording beam on the recording medium is displaced by a predetermined distance from the last record track.

摘要翻译： 公开了一种光信息记录和再现装置，其中通过记录光束将预定信号记录在旋转记录介质的轨道上，并且通过再现光束再现记录信息。 记录在最后记录轨道上的信息由记录光束再现，并且记录光束的再现光束和记录光束的照射位置离开最后的记录轨道一预定的距离。

公开(公告)号：US4646103A

公开(公告)日：1987-02-24

申请号：US832887

申请日：1986-02-26

申请人： Hisataka Sugiyama ,  Kazuo Shigematsu ,  Takeshi Maeda ,  Atsushi Saitoh ,  Wasao Takasugi

发明人： Hisataka Sugiyama ,  Kazuo Shigematsu ,  Takeshi Maeda ,  Atsushi Saitoh ,  Wasao Takasugi

IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/125 ,  G11B11/105 ,  G11B20/10 ,  G11B20/14 ,  G01D15/14 ,  G11B7/00 ,  G11B21/10

CPC分类号： G11B7/126 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/1053 ,  G11B20/10009 ,  G11B20/1403 ,  G11B7/0045 ,  G11B7/24085

摘要： In an optical recording system wherein the intensity of a laser beam is modulated with an input modulation signal so as to record information on a recording medium, the intensity modulation of the laser beam is performed after the pulse waveform of the input modulation signal is converted into two pulses which express the front edge and rear edge of the pulse waveform respectively.

摘要翻译： 在其中利用输入调制信号调制激光束的强度以将信息记录在记录介质上的光学记录系统中，在将输入调制信号的脉冲波形转换成 两个脉冲分别表示脉冲波形的前沿和后沿。

公开(公告)号：US4743774A

公开(公告)日：1988-05-10

申请号：US828719

申请日：1986-02-12

申请人： Takeshi Maeda ,  Shigeru Nakamura ,  Hisataka Sugiyama ,  Kazuo Shigematsu ,  Atsushi Saito

发明人： Takeshi Maeda ,  Shigeru Nakamura ,  Hisataka Sugiyama ,  Kazuo Shigematsu ,  Atsushi Saito

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B20/10 ,  G06K7/10

CPC分类号： G11B7/005 ,  G11B20/10009

摘要： Method and apparatus for optically detecting information from a recording medium in which pits are formed by thermal energy of a light spot to record the information. A reproduction spot is irradiated onto the recording medium to produce a detection signal. From a differential signal of the detection signal, a signal indicative of zero points of the differential signal and a signal indicative of the presence of the pits are detected, and both the signals are used to detect positions of the pits. For stable and accurate detection of the pit position, the relation between pit size W and reproduction spot size W.sub.s is prescribed and the pit size and reproduction spot size are so set as to satisfy 0.45.ltoreq.W/W.sub.s .ltoreq.0.75.

摘要翻译： 用于从记录介质光学检测信息的方法和装置，其中通过光点的热能形成凹坑以记录信息。 将再现点照射到记录介质上以产生检测信号。 根据检测信号的差分信号，检测出表示差分信号的零点的信号和指示凹坑存在的信号，并且这两个信号用于检测凹坑的位置。 为了稳定且准确地检测凹坑位置，规定凹坑尺寸W与再现点尺寸Ws之间的关系，并且将凹坑尺寸和再现点尺寸设定为满足0.45≤W/ Ws <0.75。