公开(公告)号：US5809005A

公开(公告)日：1998-09-15

申请号：US447739

申请日：1995-05-23

申请人： Kenji Ohta ,  Yoshikazu Fujii ,  Tetuya Inui ,  Toshihisa Deguchi ,  Shigemi Maeda

发明人： Kenji Ohta ,  Yoshikazu Fujii ,  Tetuya Inui ,  Toshihisa Deguchi ,  Shigemi Maeda

IPC分类号： G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10597 ,  G11B11/10563 ,  G11B11/10565 ,  G11B11/10578 ,  G11B11/10582 ,  G11B11/10584 ,  G11B7/0938 ,  G11B7/24 ,  G11B7/24085 ,  G11B7/007

摘要： A method is provided for manufacturing a magneto-optical memory element having guide grooves for storing information. The method includes applying a laser beam onto a resist film material located on a substrate to produce guide track grooves and address signal pits. Thereafter the resist film is developed. The remaining resist film is removed and a magnetic medium layer is deposited on the substrate.

摘要翻译： 提供一种用于制造具有用于存储信息的导槽的磁光存储元件的方法。 该方法包括将激光束施加到位于基板上的抗蚀剂膜材料上，以产生导轨槽和地址信号凹坑。 此后，抗蚀剂膜被显影。 去除剩余的抗蚀剂膜，并将磁介质层沉积在基底上。

公开(公告)号：US6055223A

公开(公告)日：2000-04-25

申请号：US8581

申请日：1998-01-16

申请人： Kenji Ohta ,  Yoshikazu Fujii ,  Tetuya Inui ,  Toshihisa Deguchi ,  Shigemi Maeda

发明人： Kenji Ohta ,  Yoshikazu Fujii ,  Tetuya Inui ,  Toshihisa Deguchi ,  Shigemi Maeda

IPC分类号： G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10597 ,  G11B11/10563 ,  G11B11/10565 ,  G11B11/10578 ,  G11B11/10582 ,  G11B11/10584 ,  G11B7/0938 ,  G11B7/24 ,  G11B7/24085 ,  G11B7/007

摘要： An optical memory element includes a guide track groove portion and address signal pit portion for indicating the address of the guide track groove. The address signal pit portion has a pit width narrower than the groove width of the guide track groove portion.

摘要翻译： 光学存储元件包括用于指示导轨槽的地址的导轨槽部分和地址信号凹坑部分。 地址信号凹坑部具有比导轨槽部的槽宽窄的凹坑宽度。

公开(公告)号：US5828649A

公开(公告)日：1998-10-27

申请号：US447738

申请日：1995-05-23

申请人： Kenji Ohta ,  Yoshikazu Fujii ,  Tetuya Inui ,  Toshihisa Deguchi ,  Shigemi Maeda

发明人： Kenji Ohta ,  Yoshikazu Fujii ,  Tetuya Inui ,  Toshihisa Deguchi ,  Shigemi Maeda

IPC分类号： G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10597 ,  G11B11/10563 ,  G11B11/10565 ,  G11B11/10578 ,  G11B11/10582 ,  G11B11/10584 ,  G11B7/0938 ,  G11B7/24 ,  G11B7/24085 ,  G11B7/007

摘要： An optical memory element includes a guide track groove portion and address signal pit portion for indicating the address of the guide track groove. The address signal pit portion has a pit width narrower than the groove width of the guide track groove portion.

摘要翻译： 光学存储元件包括用于指示导轨槽的地址的导轨槽部分和地址信号凹坑部分。 地址信号凹坑部具有比导轨槽部的槽宽窄的凹坑宽度。

公开(公告)号：US5182741A

公开(公告)日：1993-01-26

申请号：US568483

申请日：1990-08-16

申请人： Shigemi Maeda ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Shigemi Maeda ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B7/0037 ,  G11B7/0045 ,  G11B11/105 ,  G11B19/02 ,  G11B19/24 ,  G11B19/28

CPC分类号： G11B19/02 ,  G11B11/10504 ,  G11B11/10595 ,  G11B19/24 ,  G11B19/28 ,  G11B7/0037 ,  G11B7/0045

摘要： An optical disk recording/reproducing device for recording or reproducing information on or from an optical disk while rotatively driving the optical disk at a constant angular velocity. The disk has pre-recorded information cyclically formed along a track so as to provide rotation control at a constant linear velocity. The device, which includes a clock generating circuit for generating a clock signal for recording or reproducing in accordance with a recording frequency of the pre-recorded information derived from signals reproduced by an optical head, is designed to perform recording or reproducing operations with a recording frequency according to the clock signal. The device further includes a magnetic filed control circuit and a recording light power control circuit whereby a magnetic field and light power to be applied to the optical disk is varied according to the recording frequency during recording operations.

公开(公告)号：US4906874A

公开(公告)日：1990-03-06

申请号：US299001

申请日：1989-01-19

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/125 ,  G11B7/13 ,  G11B11/105 ,  G11B19/04 ,  G11B20/24

CPC分类号： G11B7/126 ,  G11B11/10502 ,  G11B11/10595 ,  G11B19/04 ,  G11B7/00 ,  G11B7/004 ,  G11B7/13

摘要： An analog signal switching device for use in an optical memory device having a recording/erasing mode and a mode other than the recording/erasing mode is disclosed. The switching device includes a source for producing a switch control signal which is HIGH during the recording/erasing mode and LOW during the mode other than the recording/erasing mode. An analog switch is provided for receiving a direct input analog signal and a held input signal and for providing as output the direct input signal during the LOW state of the switch control signal, and the held input signal during the HIGH state of the switch control signal by a switching operation. Further provided is a mask signal generator for generating a mask signal which covers a period during the HIGH state of the switch control signal so as to cover a period during the switching operation of the analog switch, and a gate circuit controlled by the mask signal for allowing the direct input analog signal to pass therethrough during the absence of the mask signal and for preventing the held input signal to pass therethrough during the presence of the mask signal. Thus, noise signals produced by the switching operation of the analog switch are eliminated.

公开(公告)号：US4939710A

公开(公告)日：1990-07-03

申请号：US214930

申请日：1988-07-01

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Toshihisa Deguchi ,  Shozou Kobayashi

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Toshihisa Deguchi ,  Shozou Kobayashi

IPC分类号： G11B11/105

CPC分类号： G11B11/10515 ,  G11B11/10506 ,  G11B11/10597

摘要： An optical magnetic memory device includes an optical magnetic recording medium such as a disc having recording magnetic film at least on one side thereof and initialized in a certain direction in advance, a recording section for recording data in such a manner that data-recorded portions and non-recorded portions are alternately formed, and a reproducing section for reproducing data from the recording medium by detecting the interval between the recorded or non-recorded portions. The reproducing section comprises a detector for detecting positive and negative peaks of signals reproduced from the recorded or non-recorded portion and a selector for selecting either of the detection outputs from the detector according to a control signal.

摘要翻译： 一种光磁存储器件包括：光磁记录介质，例如至少在其一侧具有记录磁膜的光磁记录介质，并且预先沿某个方向初始化;记录部分，用于以数据记录部分和 交替地形成非记录部分，以及再现部分，用于通过检测记录或非记录部分之间的间隔从记录介质再现数据。 再现部分包括检测器，用于检测从记录或非记录部分再现的信号的正峰值和负峰值，以及选择器，用于根据控制信号选择来自检测器的检测输出。

公开(公告)号：US5010540A

公开(公告)日：1991-04-23

申请号：US225892

申请日：1988-07-29

申请人： Hiroshi Fuji ,  Tsuneo Fujiwara ,  Takashi Iwaki ,  Tomiyuki Numata ,  Kentaroh Tsuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Hiroshi Fuji ,  Tsuneo Fujiwara ,  Takashi Iwaki ,  Tomiyuki Numata ,  Kentaroh Tsuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B19/247

CPC分类号： G11B19/247

摘要： An apparatus for recording and reproducing information on and from an optical disk includes a first control for producing a first control signal for controlling the rotational speed of a rotational driving apparatus, on the basis of the detected radial position; a judging apparatus which judges whether or not the reproduced signals are reproduced from a recorded region of the optical disk; a second control for producing a second control signal for controlling the rotational speed of the rotational driving apparatus, on the basis of the signals reproduced from the disk; and a switch apparatus which switches the circuit so that the rotational driving apparatus is controlled by the first control signal when the reproduced signals are not reproduced from a non-recorded region, and controlled by the second control signal when the reproduced signals are reproduced from a recorded region.

公开(公告)号：US4958337A

公开(公告)日：1990-09-18

申请号：US344530

申请日：1989-04-28

申请人： Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Takeshi Yamaguchi ,  Shigemi Maeda ,  Yoshiki Nishioka ,  Teruki Sugiura

发明人： Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Takeshi Yamaguchi ,  Shigemi Maeda ,  Yoshiki Nishioka ,  Teruki Sugiura

IPC分类号： G11B5/016 ,  G11B20/18

CPC分类号： G11B20/1816 ,  G11B5/016

摘要： A disk recording checking method in which recording is performed on a disk having radially different recording tracks each divided circumferentially into a plurality of sectors. The method employs a continuous writing device for continuously writing data onto a predetermined number of the sectors, and a continuous checking device for checking the data, while continuously reading the data from the predetermined number of the sectors. The method utilized checks both the number of errors in each code sequence and the total number of errors in each sector to determine if the data in the sector is valid.

摘要翻译： 一种磁盘记录检查方法，其中在具有径向不同的记录磁道的磁盘上执行记录，每个记录磁道分别沿周向分成多个扇区。 该方法采用连续写入装置，用于将数据连续地写入预定数量的扇区;以及连续检查装置，用于在从预定数量的扇区连续读取数据的同时检查数据。 所使用的方法检查每个代码序列中的错误数量和每个扇区中的错误总数，以确定扇区中的数据是否有效。

公开(公告)号：US4920528A

公开(公告)日：1990-04-24

申请号：US16258

申请日：1987-02-19

申请人： Noriaki Sakamoto ,  Yoshiki Nishioka ,  Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Shigemi Maeda

发明人： Noriaki Sakamoto ,  Yoshiki Nishioka ,  Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Shigemi Maeda

IPC分类号： G11B20/18

CPC分类号： G11B20/1883 ,  G11B2220/20

摘要： A disk recording method in which recording is performed on a disklike recording medium having a radially coaxial or spiral recording track that is divided into a predetermined plural number of recording sectors each acting as a recording unit. A predetermined number of dedicated sectors are provided at a rear portion of the recording track so that the contents that are recorded in defective sectors of the recording sectors are alternatively assigned to the dedicated sectors.

摘要翻译： 一种盘记录方法，其中在具有径向同轴或螺旋记录轨道的盘状记录介质上执行记录，所述盘状记录介质被分成预定的多个作为记录单元的记录扇区。 预定数量的专用扇区设置在记录轨道的后部，使得记录在记录扇区的缺陷扇区中的内容交替地分配给专用扇区。

公开(公告)号：US4910479A

公开(公告)日：1990-03-20

申请号：US299013

申请日：1989-01-19

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B11/105 ,  G11B19/02 ,  G11B20/10

CPC分类号： G11B20/10027 ,  G11B11/10515 ,  G11B11/10597 ,  G11B19/02 ,  G11B20/10009 ,  G11B7/005

摘要： An automatic gain control device for use in an optical memory device has a circuit for producing an amplification control signal which is fed back to a gain control amplifier through a sample-hold circuit. A pulse train detection circuit is provided for detecting the pulse train indicating that the data stored are a on the optical memory device is being playedback. When the pulse train is detected, the sample-hold circuit is made inactive so that the amplification control signal is directly fed back to the gain control amplifier, and when the pulse train ends, the sample-hold circuit is made active to hold the amplification control signal obtained at the end of the pulse train and to produce the amplification control signal held in the sample-hold circuit.