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1. 发明授权

US06205098B1 Optical reproduction method and optical information apparatus 失效
标题翻译：光学再现方法和光学信息设备
公开(公告)号：US06205098B1
公开(公告)日：2001-03-20
申请号：US09142023
申请日：1998-08-31
申请人： Harukazu Miyamoto , Hideki Saga , Seiji Yonezawa
发明人： Harukazu Miyamoto , Hideki Saga , Seiji Yonezawa
IPC分类号： G11B700
CPC分类号： G11B11/10515 , G11B7/005
摘要： An objective is to provide a technique capable of reproducing high-density recorded fine recording marks with excellent high output and excellent quality. To this end, with the present invention, light 501 is irradiated intermittently to an optical recording medium changeable in optical nature due to irradiation of light, permitting a differential amplifier 503 to perform differential processing of a signal as obtained by detection of reflection light rays at at least two time points during irradiation of the intermittent light to thereby obtain a reproduction signal. It is thus possible to effectively detect only a signal component of certain part whereat the reflection light is changed due to light irradiation during irradiation of the intermittent light, which in turn enables reproduction of fine record information with increased resolution while enabling suppression of those components other than the change component. This makes it possible to obtain a reproduction signal with good quality.
摘要翻译：目的是提供一种能够再现具有优异的高输出和优良品质的高密度记录精细记录标记的技术。为此，通过本发明，光501被间歇地照射到由于光的照射而在光学性质上可变化的光记录介质，允许差分放大器503对通过检测到的反射光线的检测获得的信号进行差分处理在间歇光照射期间的至少两个时间点，从而获得再现信号。因此，可以有效地仅检测在间歇光照射期间由于光照射而导致的反射光发生变化的某部分的信号分量，从而能够以增加的分辨率再现精细记录信息，同时能够抑制其他部分比变化组件。这使得可以获得质量好的再现信号。

2. 发明授权

US06614737B2 Optical reproduction method and optical information device 失效
公开(公告)号：US06614737B2
公开(公告)日：2003-09-02
申请号：US10076149
申请日：2002-02-15
申请人： Harukazu Miyamoto , Hideki Saga , Seiji Yonezawa
发明人： Harukazu Miyamoto , Hideki Saga , Seiji Yonezawa
IPC分类号： G11B700
CPC分类号： G11B7/005 , G11B11/10515
摘要： An optical reproduction apparatus includes a light source which irradiates irradiation light onto a recording medium, the irradiation light being reflected by the recording medium to produce reflection light, a modulator which repetitively pulse modulates the irradiation light to produce irradiation light pulses, a photodetector which detects reflection light from the recording medium at more than two timings during each of the irradiation light pulses, and outputs detection signals respectively representative of the reflection light detected at the more than two timings during each of the irradiation light pulses, and an operation circuit which performs an operation between the detection signals outputted from the photodetector during each of the irradiation light pulses.

3. 发明授权

US06442120B1 Optical reproduction method and optical information device 有权
公开(公告)号：US06442120B1
公开(公告)日：2002-08-27
申请号：US09761185
申请日：2001-01-18
申请人： Harukazu Miyamoto , Hideki Saga , Seiji Yonezawa
发明人： Harukazu Miyamoto , Hideki Saga , Seiji Yonezawa
IPC分类号： G11B700
摘要： An optical reproduction method for reproducing information includes intermittently irradiating light to a moving optical medium, detecting reflected light from the moving optical medium while the light is irradiated intermittently when a moving distance of a light spot of the intermittently irradiated light on the moving optical medium is smaller than a diameter of the light spot, processing information based on the detected reflected light utilizing a differential operation, and obtaining a reproduction signal based on the differential operation.

4. 发明授权

US5886969A High-density information recording/reproducing method 失效
标题翻译：高密度信息记录/再现方法
公开(公告)号：US5886969A
公开(公告)日：1999-03-23
申请号：US976011
申请日：1997-11-21
申请人： Takeshi Maeda , Hisataka Sugiyama , Hiroyuki Awano , Harukazu Miyamoto , Keikichi Andoo , Kouichirou Wakabayashi , Atsushi Saito , Takeshi Shimano , Junko Ushiyama , Osamu Komoda , Hideki Saga
发明人： Takeshi Maeda , Hisataka Sugiyama , Hiroyuki Awano , Harukazu Miyamoto , Keikichi Andoo , Kouichirou Wakabayashi , Atsushi Saito , Takeshi Shimano , Junko Ushiyama , Osamu Komoda , Hideki Saga
IPC分类号： G11B7/004 , G11B7/007 , G11B7/013 , G11B7/085 , G11B7/09 , G11B7/13 , G11B7/135 , G11B7/14 , G11B11/105 , G11B20/14 , G11B7/00
CPC分类号： B82Y10/00 , G11B11/10502 , G11B11/10545 , G11B11/10584 , G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10287 , G11B20/1037 , G11B20/10509 , G11B7/004 , G11B7/00745 , G11B7/08529 , G11B7/0901 , G11B7/0938 , G11B7/0943 , G11B7/133 , G11B7/1365 , G11B20/1496 , G11B2020/10638 , G11B2020/10759 , G11B2220/2537 , G11B7/013 , G11B7/13 , G11B7/14 , G11B7/24088
摘要： An optical recording/reproducing method employs a recording laser beam having a first output and a first wavelength, and a reproducing laser beam having a second output lower than the first output and a second wavelength shorter than the first wavelength. A disk-like recording medium is irradiated with the recording and reproducing laser beams by use of an objective lens having an NA of about 0.55 so that a small mark equal to or smaller than about one fourth of a spot size optically defined from the wavelength of the recording laser beam and the NA of the objective lens is formed on the recording medium by a recording characteristic of the recording medium and a shielding plate provided in an optical system for irradiation with the laser beam. Two-dimensional recording is performed as a recording system to arrange marks at lattice points of a two-dimensional lattice which extend in a track direction and a track radius direction. The reproducing system detects a reproduction signal from the mark on the two-dimensional lattice point, and the reproduction signal from each mark is used to perform a signal processing, thereby detecting information.
摘要翻译：光学记录/再现方法采用具有第一输出和第一波长的记录激光束，以及具有比第一输出低的第二输出和比第一波长短的第二波长的再现激光束。通过使用NA为约0.55的物镜，用记录和再现激光束照射盘状记录介质，使得等于或小于光斑大小的四分之一的小的标记，其光学尺寸从通过记录介质的记录特性和设置在用于照射激光束的光学系统中的屏蔽板，在记录介质上形成记录激光束和物镜的NA。执行二维记录作为记录系统，以在轨道方向和轨道半径方向上延伸的二维网格的格点处布置标记。再现系统检测来自二维格点上的标记的再现信号，并且使用来自每个标记的再现信号进行信号处理，从而检测信息。

5. 发明授权

US5835469A High-density information recording/reproducing method 失效
标题翻译：高密度信息记录/再现方法
公开(公告)号：US5835469A
公开(公告)日：1998-11-10
申请号：US553433
申请日：1995-11-20
申请人： Takeshi Maeda , Hisataka Sugiyama , Hiroyuki Awano , Harukazu Miyamoto , Keikichi Andoo , Kouichirou Wakabayashi , Atsushi Saito , Takeshi Shimano , Junko Ushiyama , Osamu Komoda , Hideki Saga
发明人： Takeshi Maeda , Hisataka Sugiyama , Hiroyuki Awano , Harukazu Miyamoto , Keikichi Andoo , Kouichirou Wakabayashi , Atsushi Saito , Takeshi Shimano , Junko Ushiyama , Osamu Komoda , Hideki Saga
IPC分类号： G11B7/004 , G11B7/007 , G11B7/013 , G11B7/085 , G11B7/09 , G11B7/13 , G11B7/135 , G11B7/14 , G11B11/105 , G11B20/14 , G11B7/00
CPC分类号： B82Y10/00 , G11B11/10502 , G11B11/10545 , G11B11/10584 , G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10287 , G11B20/1037 , G11B20/10509 , G11B7/004 , G11B7/00745 , G11B7/08529 , G11B7/0901 , G11B7/0938 , G11B7/0943 , G11B7/133 , G11B7/1365 , G11B20/1496 , G11B2020/10638 , G11B2020/10759 , G11B2220/2537 , G11B7/013 , G11B7/13 , G11B7/14 , G11B7/24088
摘要： An optical recording/reproducing method employs a recording laser beam having a first output and a first wavelength, and a reproducing laser beam having a second output lower than the first output and a second wavelength shorter than the first wavelength. A disk-like recording medium is irradiated with the recording and reproducing laser beams by use of an objective lens having an NA of about 0.55 so that a small mark equal to or smaller than about one fourth of a spot size optically defined from the wavelength of the recording laser beam and the NA of the objective lens is formed on the recording medium by a recording characteristic of the recording medium and a shielding plate provided in an optical system for irradiation with the laser beam. Two-dimensional recording is performed as a recording system to arrange marks at lattice points of a two-dimensional lattice which extend in a track direction and a track radius direction. The reproducing system detects a reproduction signal from the mark on the two-dimensional lattice point, and the reproduction signal from each mark is used to perform a signal processing, thereby detecting information.
摘要翻译： PCT No.PCT / JP95 / 00542 Sec。 371日期：1995年11月20日 102（e）1995年11月20日日期PCT 1995年3月25日PCT PCT。公开号WO95 / 26548 日期1995年10月5日光记录/再现方法采用具有第一输出和第一波长的记录激光束和具有比第一输出低的第二输出和比第一波长短的第二波长的再现激光束。通过使用NA为约0.55的物镜，用记录和再现激光束照射盘状记录介质，使得等于或小于光斑大小的四分之一的小的标记，其光学尺寸从通过记录介质的记录特性和设置在用于照射激光束的光学系统中的屏蔽板，在记录介质上形成记录激光束和物镜的NA。执行二维记录作为记录系统，以在轨道方向和轨道半径方向上延伸的二维网格的格点处布置标记。再现系统检测来自二维格点上的标记的再现信号，并且使用来自每个标记的再现信号进行信号处理，从而检测信息。

6. 发明授权

US5946275A Optical readout method with a direction of a magnetic field applied to a recording medium changed with a signal, and a system therefor 失效
标题翻译：具有施加到记录介质的磁场的方向的光学读出方法用信号改变，及其系统
公开(公告)号：US5946275A
公开(公告)日：1999-08-31
申请号：US179868
申请日：1998-10-28
申请人： Harukazu Miyamoto , Hirofumi Sukeda , Hideki Saga
发明人： Harukazu Miyamoto , Hirofumi Sukeda , Hideki Saga
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/1053 , G11B11/10586
摘要： An optical recording medium, optical recording method with use of it, and optical recording device for it comprise at least one magnetic layer on a substrate, the magnetic layer having a temperature Tco at which sizes of domains of the magnetic layer is sharply shrunk or expanded with temperature, thereby being capable of writing and reproducing high-density information formed of smaller domains than an optical spot diameter in a high signal quality.
摘要翻译：光记录介质，使用该光记录介质的光记录方法及其用于其的光记录装置包括在基板上的至少一个磁性层，该磁性层具有温度Tco，其中磁性层的畴的尺寸急剧缩小或扩大从而能够以高信号质量写入和再现由比光点直径小的畴形成的高密度信息。

7. 发明授权

US5867455A Optical method and device for irradiating domains at predetermined positions 失效
标题翻译：用于在预定位置辐射畴的光学方法和装置
公开(公告)号：US5867455A
公开(公告)日：1999-02-02
申请号：US915086
申请日：1997-08-20
申请人： Harukazu Miyamoto , Hirofumi Sukeda , Hideki Saga
发明人： Harukazu Miyamoto , Hirofumi Sukeda , Hideki Saga
IPC分类号： G11B11/10 , G11B11/105 , G11B13/04
CPC分类号： G11B11/10515 , G11B11/1053 , G11B11/10586
摘要： An optical recording medium, optical recording method with use of it, and optical recording device for it comprise at least one magnetic layer on a substrate, the magnetic layer having a temperature Tco at which sizes of domains of the magnetic layer is sharply shrunk or expanded with temperature, thereby being capable of writing and reproducing high-density information formed of smaller domains than an optical spot diameter in a high signal quality.
摘要翻译：光记录介质，使用该光记录介质的光记录方法及其用于其的光记录装置包括在基板上的至少一个磁性层，该磁性层具有温度Tco，其中磁性层的畴的尺寸急剧缩小或扩大从而能够以高信号质量写入和再现由比光点直径小的畴形成的高密度信息。

8. 发明授权

US5726955A Magneto optical recording medium apparatus and method utilizing light pulse magnetic modulation recording 失效
标题翻译：磁光记录介质装置和方法利用光脉冲磁调制记录
公开(公告)号：US5726955A
公开(公告)日：1998-03-10
申请号：US744760
申请日：1996-11-06
申请人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
发明人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
IPC分类号： G11B20/10 , G11B5/02 , G11B7/006 , G11B7/007 , G11B11/10 , G11B11/105 , G11B27/19 , G11B27/30 , G11B11/00
CPC分类号： G11B7/00745 , G11B11/10513 , G11B11/10521 , G11B11/10528 , G11B11/1053 , G11B11/10595 , G11B27/19 , G11B27/3027 , G11B7/006
摘要： A magneto-optical data recording system comprises magnetic field pulse applying means for applying to a magneto-optic recording medium a magnetic field pulse of a polarity corresponding to code data to be recorded, and means for heating the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to be recorded. During recording, the magnetic field pulse applying means applies a magnetic field pulse of a polarity corresponding to code data along a track of the recording medium and the heating means continuously heats the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to thereby directly overwrite the code data. The magnetic field pulse applying means includes a magnetic coil driven by code data from a source of code data (data generator). The heating means includes an optical head which comprises a source of laser beam driven by a laser driver and an optical system which focuses the laser beam from the source of laser beam as a small light spot onto the recording medium.
摘要翻译：一种磁光数据记录系统，包括磁场脉冲施加装置，用于向磁光记录介质施加与要记录的代码数据相对应的极性的磁场脉冲，以及用于以脉动方式加热记录介质的装置，与要记录的代码数据同步的预定频率。在记录期间，磁场脉冲施加装置沿着记录介质的轨道施加与代码数据对应的极性的磁场脉冲，并且加热装置以与代码数据同步的预定频率的脉动方式连续地加热记录介质从而直接覆盖代码数据。磁场脉冲施加装置包括由代码数据源（数据发生器）的代码数据驱动的磁线圈。加热装置包括光学头，其包括由激光驱动器驱动的激光束源和将来自激光源的激光束作为小光点聚焦到记录介质上的光学系统。

9. 发明授权

US5959943A Information recording medium with clock information therein 失效
标题翻译：具有时钟信息的信息记录介质
公开(公告)号：US5959943A
公开(公告)日：1999-09-28
申请号：US932056
申请日：1997-09-17
申请人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
发明人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
IPC分类号： G11B20/10 , G11B5/02 , G11B7/006 , G11B7/007 , G11B11/10 , G11B11/105 , G11B27/19 , G11B27/30 , G11B11/00
CPC分类号： G11B7/00745 , G11B11/10513 , G11B11/10521 , G11B11/10528 , G11B11/1053 , G11B11/10595 , G11B27/19 , G11B27/3027 , G11B7/006
摘要： A magneto-optical data recording system comprises magnetic field pulse applying means for applying to a magneto-optic recording medium a magnetic field pulse of a polarity corresponding to code data to be recorded, and means for heating the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to be recorded. During recording, the magnetic field pulse applying means applies a magnetic field pulse of a polarity corresponding to code data along a track of the recording medium and the heating means continuously heats the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to thereby directly overwrite the code data. The magnetic field pulse applying means includes a magnetic coil driven by code data from a source of code data (data generator). The heating means includes an optical head which comprises a source of laser beam driven by a laser driver and an optical system which focuses the laser beam from the source of laser beam as a small light spot onto the recording medium.
摘要翻译：一种磁光数据记录系统，包括磁场脉冲施加装置，用于向磁光记录介质施加与要记录的代码数据相对应的极性的磁场脉冲，以及用于以脉动方式加热记录介质的装置，与要记录的代码数据同步的预定频率。在记录期间，磁场脉冲施加装置沿着记录介质的轨道施加与代码数据对应的极性的磁场脉冲，并且加热装置以与代码数据同步的预定频率的脉动方式连续地加热记录介质从而直接覆盖代码数据。磁场脉冲施加装置包括由代码数据源（数据发生器）的代码数据驱动的磁线圈。加热装置包括光学头，其包括由激光驱动器驱动的激光束源和将来自激光源的激光束作为小光点聚焦到记录介质上的光学系统。

10. 发明授权

US5473581A Magneto-optical data recording system continuously irradiating optical pulsers 失效
标题翻译：磁光数据记录系统连续照射光脉冲器
公开(公告)号：US5473581A
公开(公告)日：1995-12-05
申请号：US979338
申请日：1992-11-20
申请人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
发明人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
IPC分类号： G11B20/10 , G11B5/02 , G11B7/006 , G11B7/007 , G11B11/10 , G11B11/105 , G11B27/19 , G11B27/30 , G11B11/00
CPC分类号： G11B7/00745 , G11B11/10513 , G11B11/10521 , G11B11/10528 , G11B11/1053 , G11B11/10595 , G11B27/19 , G11B27/3027 , G11B7/006
摘要： A magneto-optical data recording system comprises magnetic field pulse applying apparatus for applying to a magneto-optic recording medium a magnetic field pulse of a polarity corresponding to code data to be recorded, and apparatus for heating the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to be recorded. During recording, the magnetic field pulse applying apparatus applies a magnetic field pulse of a polarity corresponding to code data along a track of the recording medium and the heating apparatus continuously heats the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to thereby directly overwrite the code data. The magnetic field pulse applying apparatus includes a magnetic coil driven by code data from a source of code data (data generator). The heating apparatus includes an optical head which comprises a source of laser beam driven by a laser driver and an optical system which focuses the laser beam from the source of laser beam as a small light spot onto the recording medium.
摘要翻译：一种磁光数据记录系统，包括磁场脉冲施加装置，用于向磁光记录介质施加与要记录的代码数据相对应的极性的磁场脉冲，以及用于以脉动方式加热记录介质的装置，与要记录的代码数据同步的预定频率。在记录期间，磁场脉冲施加装置沿着记录介质的轨道施加与代码数据对应的极性的磁场脉冲，并且加热装置以与代码数据同步的预定频率的脉动方式连续地加热记录介质从而直接覆盖代码数据。磁场脉冲施加装置包括由代码数据源（数据发生器）的代码数据驱动的磁线圈。加热装置包括光学头，其包括由激光驱动器驱动的激光束源和将来自激光源的激光束作为小光点聚焦到记录介质上的光学系统。

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