公开(公告)号：US5629913A

公开(公告)日：1997-05-13

申请号：US612328

申请日：1996-03-07

申请人： Toshimitsu Kaku ,  Masahiko Ishimaru

发明人： Toshimitsu Kaku ,  Masahiko Ishimaru

IPC分类号： G11B20/10 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/125 ,  G11B11/105 ,  G11B19/02 ,  G11B20/18 ,  G11B27/36

CPC分类号： G11B7/126 ,  G11B11/1053 ,  G11B11/10595 ,  G11B19/02 ,  G11B20/1816 ,  G11B20/182 ,  G11B27/36 ,  G11B7/0045

摘要： An optical disk recording control apparatus includes a judgment circuit for judging a modulation system of user information in accordance with identification information possessed by the optical disk and outputting a control signal concerning the modulation system, a test write pattern generating circuit for generating a test write pattern constituted by the densest and sparsest patterns correspondingly to the code configuration of the identified modulation system, a test write pulse recording circuit for generating a test write pulse string from the test write pattern and recording the test write pulse string in a predetermined zone of the optical disk, an optimum recording power calculation circuit for obtaining optimum recording power for the predetermined zone on the basis of a densest pattern waveform and a sparsest pattern waveform so that the zero level of the densest pattern waveform coincides with the zero level of the sparsest pattern waveform in the test write pulse string recorded in the predetermined zone, and a user information recording circuit for recording the user information into each zone of the optical disk correspondingly to the obtained optimum recording power in accordance with the modulation system, whereby the different modulation system test writing is performed in accordance with the identification information possessed by the optical disk and then the user information is recorded into the optical disk.

摘要翻译： 光盘记录控制装置包括：判断电路，用于根据光盘所具有的识别信息判断用户信息的调制系统，并输出与调制系统有关的控制信号;测试写入模式产生电路，用于产生测试写入模式 由与所识别的调制系统的代码配置相对应的最密集和最稀疏的图案构成的测试写入脉冲记录电路，用于从测试写入模式产生测试写入脉冲串，并将测试写入脉冲串记录在光学的预定区域中 磁盘，最佳记录功率计算电路，用于基于最密集的图形波形和最小图案波形获得用于预定区域的最佳记录功率，使得最密集图形波形的零电平与稀疏图案波形的零电平一致 在测试写脉冲串r 记录在预定区域中的用户信息记录电路，以及用户信息记录电路，用于根据调制系统将获得的最佳记录功率对应于用户信息记录到光盘的每个区域中，由此根据调制系统执行不同的调制系统测试写入 光盘所拥有的识别信息和用户信息被记录在光盘中。

公开(公告)号：US5105409A

公开(公告)日：1992-04-14

申请号：US230971

申请日：1988-08-11

申请人： Toshimitsu Kaku ,  Kazuo Shigematsu ,  Hisataka Sugiyama ,  Takeshi Maeda ,  Masahiro Takasago

发明人： Toshimitsu Kaku ,  Kazuo Shigematsu ,  Hisataka Sugiyama ,  Takeshi Maeda ,  Masahiro Takasago

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/09

CPC分类号： G11B7/094

摘要： Disclosed is an optical recording and reproducing apparaus comprising a light source directing a light spot toward a recording medium, a detection system detecting light reflected from the recording medium to derive an electrical signal from the reflected light, an information processing circuit modulating the intensity of the light spot according to writing pulses to record information on the recording medium and using the electrical signal to reproduce information from the recording medium, and a tracking servo circuit carrying out tracking servo operation on the basis of the electrical signal and including an extracting circuit connected to a source of extracting pulses having a pulse width at least equal to the writing pulse width so that writing pulse parts contained in the electrical signal are extracted during recording information, whereby a track offset occurring during information recording can be minimized, and the stability of the tracking servo system can be improved.

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。

公开(公告)号：US4879703A

公开(公告)日：1989-11-07

申请号：US71178

申请日：1987-07-08

申请人： Toshimitsu Kaku ,  Yoshito Tsunoda ,  Kazuo Shigematsu

发明人： Toshimitsu Kaku ,  Yoshito Tsunoda ,  Kazuo Shigematsu

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B19/02 ,  G11B20/18 ,  G11B27/36

CPC分类号： G11B20/1883 ,  G11B11/105 ,  G11B11/10517 ,  G11B11/10595 ,  G11B19/02 ,  G11B27/36

摘要： A magneto-optic memory apparatus is disclosed in which a laser beam is focused on a recording medium having a perpendicularly-magnetized film, the intensity of said laser beam is caused to correspond to reproducing, recording and erasing operations, an external magnetic field is applied to the recording medium at least in recording and erasing periods so that the magnetic field in the recording period is opposite in direction to the magnetic field in the erasing period, a light quantity signal corresponding to the light quantity reflected from the recording medium and a magnetization signal corresponding to data recorded on the recording medium are produced by using the reflected light from the recording medium, at least one of the light quantity signal and the magnetization is amplified by a variable gain amplifier so that an amplified value in the erasing period is nearly equal to an amplified value in the reproducing period, a defect on the recording medium is detected from the output of the variable gain amplifier in the erasing period, and defect information thus obtained is utilized to record data in a non-defective region of the recording medium.

摘要翻译： 公开了一种磁光存储装置，其中激光束聚焦在具有垂直磁化膜的记录介质上，使得激光束的强度对应于再现，记录和擦除操作，施加外部磁场 至少在记录和擦除周期到记录介质，使得记录周期中的磁场在擦除周期中与磁场的方向相反，对应于从记录介质反射的光量的光量信号和磁化 通过使用来自记录介质的反射光产生对应于记录在记录介质上的数据的信号，光量信号和磁化中的至少一个被可变增益放大器放大，使得擦除周期中的放大值几乎 在再现期间等于放大值，从外部检测记录介质上的缺陷 并且利用这样获得的缺陷信息将数据记录在记录介质的无缺陷区域中。

公开(公告)号：US4819242A

公开(公告)日：1989-04-04

申请号：US932495

申请日：1986-11-20

申请人： Toshimitsu Kaku ,  Kazuo Shigematsu

发明人： Toshimitsu Kaku ,  Kazuo Shigematsu

IPC分类号： G11B7/125 ,  H01S5/062 ,  H01S5/068 ,  H01S3/00 ,  H01S3/10

CPC分类号： G11B7/126 ,  H01S5/06213 ,  H01S5/06825

摘要： A low-laser-noise semiconductor driver device is provided for use in an optical information processing device which is recordable or erasable and which oscillates a semiconductor laser with a high output when it is recorded or erased. A semiconductor is generally oscillated with a rated maximum output during a recording and erasing operation. Therefore, when high frequency superposition is made in such a high output oscillation state, an oscillation output exceeds the rated output, which badly influences the life of the laser. To obviate this drawback, the high frequency superposition is stopped at the mode of recording or erasing in which the high output oscillation is made by a switching circuit which is controlled by a mode control signal. This reduces the laser noise at the mode of reproducing and also lengthens the life of the semiconductor laser. The semiconductor laser driver device can be also used as a light source of the optical information processing device which can record and/or erase information.

摘要翻译： 提供了一种用于可记录或可擦除的光学信息处理装置的低激光噪声半导体驱动器装置，并且当记录或擦除时具有高输出的半导体激光器振荡。 在记录和擦除操作期间，半导体通常以额定最大输出振荡。 因此，当在这样的高输出振荡状态下进行高频叠加时，振荡输出超过额定输出，这严重影响激光器的寿命。 为了避免这种缺点，在通过由模式控制信号控制的开关电路进行高输出振荡的记录或擦除模式下，高频叠加停止。 这就降低了在再现模式下的激光噪声，并延长了半导体激光器的寿命。 半导体激光驱动器装置也可以用作可以记录和/或擦除信息的光学信息处理装置的光源。

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。

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。

公开(公告)号：US4400707A

公开(公告)日：1983-08-23

申请号：US290654

申请日：1981-08-06

申请人： Munehisa Mitsuya ,  Motoyasu Terao ,  Sakae Ota ,  Yoshio Taniguchi ,  Toshimitsu Kaku ,  Shinkichi Horigome

发明人： Munehisa Mitsuya ,  Motoyasu Terao ,  Sakae Ota ,  Yoshio Taniguchi ,  Toshimitsu Kaku ,  Shinkichi Horigome

IPC分类号： B41M5/26 ,  B41M5/24 ,  B41M5/40 ,  B41M5/42 ,  G11B7/24 ,  G11B7/257 ,  G01D15/34

CPC分类号： B41M5/24 ,  G11B7/2575 ,  B41M5/42 ,  G11B7/244 ,  G11B7/252

摘要： A recording medium in which a substrate, an inorganic material layer adapted to absorb light and generate heat, a first organic material layer made of an organic matter containing metal, and a second organic material layer adapted to be deformed or removed by heat are successively stacked. A metal salt of an organic acid, or organic metal compound etc. are employed for the first organic material layer. Owing to the presence of this layer, the recording medium exhibits a stability against changes in the ambient temperature.

摘要翻译： 依次层叠记录介质，其中衬底，适于吸收光并产生热的无机材料层，由含金属的有机物构成的第一有机材料层和适于被加热变形或除去的第二有机材料层 。 有机酸或有机金属化合物等的金属盐用于第一有机材料层。 由于该层的存在，记录介质对环境温度的变化表现出稳定性。

公开(公告)号：US08305869B2

公开(公告)日：2012-11-06

申请号：US13153491

申请日：2011-06-06

申请人： Akira Kitayama ,  Toshimitsu Kaku ,  Hajime Nishimura

发明人： Akira Kitayama ,  Toshimitsu Kaku ,  Hajime Nishimura

IPC分类号： G11B7/00

CPC分类号： G11B7/005 ,  G11B7/13

摘要： Bandwidth is secured for a read signal transmission line by matching the characteristic impedance of the read signal transmission line with the output impedance of a photodetector of an optical pick up, while at the same time securing bandwidth for the photodetector. In an optical disc drive according to an embodiment of the present invention, each line forming a differential transmission line is divided into a plurality of lines of the same quantity, the quantity being two or more, at or near a connection point between a flexible line and the optical pick up.

摘要翻译： 通过将读信号传输线的特性阻抗与光拾取器的光电检测器的输出阻抗匹配，同时确保光电检测器的带宽，从而确保读信号传输线的带宽。 在根据本发明的实施例的光盘驱动器中，形成差分传输线的每条线在柔性线之间的连接点处或其附近被分成多个相同数量的线，其数量为两个或更多个 和光学拾取。

公开(公告)号：US20120044795A1

公开(公告)日：2012-02-23

申请号：US13153491

申请日：2011-06-06

申请人： Akira KITAYAMA ,  Toshimitsu Kaku ,  Hajime Nishimura

发明人： Akira KITAYAMA ,  Toshimitsu Kaku ,  Hajime Nishimura

IPC分类号： G11B7/004 ,  G11B7/13

CPC分类号： G11B7/005 ,  G11B7/13

摘要： Bandwidth is secured for a read signal transmission line by matching the characteristic impedance of the read signal transmission line with the output impedance of a photodetector of an optical pick up, while at the same time securing bandwidth for the photodetector. In an optical disc drive according to an embodiment of the present invention, each line forming a differential transmission line is divided into a plurality of lines of the same quantity, the quantity being two or more, at or near a connection point between a flexible line and the optical pick up.

摘要翻译： 通过将读信号传输线的特性阻抗与光拾取器的光电检测器的输出阻抗匹配，同时确保光电检测器的带宽，从而确保读信号传输线的带宽。 在根据本发明的实施例的光盘驱动器中，形成差分传输线的每条线在柔性线之间的连接点处或其附近被分成多个相同数量的线，其数量为两个或更多个 和光学拾取。