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    • 41. 发明申请
    • Optical disk medium and tracking method
    • 光盘介质和跟踪方法
    • US20080285431A1
    • 2008-11-20
    • US11882915
    • 2007-08-07
    • Hiroyuki MinemuraToshimichi ShintaniYumiko AnzaiSoichiro Eto
    • Hiroyuki MinemuraToshimichi ShintaniYumiko AnzaiSoichiro Eto
    • G11B7/26
    • G11B7/0901G11B7/0938G11B7/094G11B7/24G11B7/24079G11B7/24085
    • A super-resolution material is formed in only a data pit, in a low temperature state of the super-resolution material, reflectivity of each of a pit portion and a space portion and an optical phase difference therebetween are set to be sufficiently small, in a high temperature state, and at least the optical phase difference between the pit and the space is set to be larger than the aforementioned value in an absolute value. Accordingly, by conducting irradiation with an appropriate read power by which substantially only one data track width can be heated to a high temperature state, a good push-pull signal can be obtained even with a track pitch being less than a diffraction limit. At the same time, by an optical device having functions such as a switching means with a DPP type, an offset correcting means of the push-pull signal due to lens shift, a shaping means of the push-pull signal, a learning means of read power, and the like, there is provided an optical disk device that corresponds to the optical disk medium of the present invention and achieves an increase in capacity.
    • 仅在数据凹坑中形成超分辨率材料,在超分辨率材料的低温状态下,凹坑部分和空间部分的每一个的反射率以及它们之间的光学相位差被设置为足够小,在 高温状态,并且凹坑和空间之间的至少光学相位差被设定为大于上述绝对值的值。 因此,通过以基本上只有一个数据磁道宽度可以被加热到高温状态的适当的读取功率进行照射,即使轨道间距小于衍射极限,也可以获得良好的推挽信号。 同时,通过具有诸如DPP型切换装置的功能的光学装置,由于透镜移位引起的推挽信号的偏移校正装置,推挽信号的整形装置,学习装置 读取功率等,提供了对应于本发明的光盘介质的光盘装置,并且实现了容量的增加。
    • 47. 发明申请
    • Digital information reproduction method
    • 数字信息再现方法
    • US20090106627A1
    • 2009-04-23
    • US12153328
    • 2008-05-16
    • Hiroyuki MinemuraToshimichi ShintaniYumiko AnzaiSoichiro Eto
    • Hiroyuki MinemuraToshimichi ShintaniYumiko AnzaiSoichiro Eto
    • H03M13/05G06F11/10
    • G11B20/1426G11B20/10009G11B20/10101G11B20/10277G11B20/10453G11B20/1803H03M5/145
    • An optical disc using super-resolution effects that achieves higher-density recording exceeding the optical resolution suffers from the signal-quality degradation caused by the normal resolution component included in the reproduction signal. To address this problem, a data reproduction method is provided. In the method, characteristic error patterns are identified and parity check codes in conformity with run-length limited coding are used to carry out efficient and reliable error correction. Error patterns caused by the normal resolution crosstalk are localized in the leading edges of a mark following a long space and in the trailing edges of a long mark. Whether an error exists in the data is determined by use of the parity check codes. When an error occurs, a pattern in which an error is most likely to occur is selected from the above-mentioned patterns by taking account of the edge shift direction, and then the error therein is corrected.
    • 使用实现超过光学分辨率的更高密度记录的超分辨率效果的光盘遭受由再现信号中包括的正常分辨率分量引起的信号质量劣化。 为了解决这个问题,提供了一种数据再现方法。 在该方法中,识别特征误差模式,并且使用符合游程长度限制编码的奇偶校验码进行有效和可靠的纠错。 由正常分辨率串扰引起的误差图案位于长间隔后面的标记的前边缘以及长标记的后缘。 通过使用奇偶校验码来确定数据中是否存在错误。 当发生错误时,通过考虑边缘移位方向从上述模式中选择出现错误最可能发生的模式,然后纠正其中的错误。
    • 48. 发明授权
    • Optical disk, optical disk apparatus, and method for writing figures
    • 光盘,光盘装置以及写入图形的方法
    • US06532034B2
    • 2003-03-11
    • US09942614
    • 2001-08-31
    • Akemi HirotsuneYoshiko NishiYumiko Anzai
    • Akemi HirotsuneYoshiko NishiYumiko Anzai
    • B41J2435
    • G11B7/0037G11B7/006G11B7/0079G11B7/24038G11B7/24094G11B23/38G11B23/40
    • A method of writing a visible figure in an optical disk, including the steps of providing an application program; providing an optical disk having a recording region/film made of a phase-changing material in which a first visible figure is written, the application program storing data to write a second visible figure in the optical disk; reading data for writing the second visible figure; developing figure data which has been read into writing coordinates; converting the writing coordinates into disk coordinates; generating a laser driving pattern for each track of the recording region/film to write the second visible figure based on the developed figure data on the disk coordinates; and driving the laser based on the laser driving pattern, thereby irradiating the optical disk to write the second visible figure in the recording region/film to change the first visible figure into the second visible figure.
    • 一种将可视图形写入光盘的方法,包括提供应用程序的步骤; 提供一种具有记录区域/薄膜的光盘,所述记录区域/胶片由其中写入第一可见图形的相变材料制成,所述应用程序存储数据以将第二可见图形写入所述光盘; 读取第二个可见图形的数据; 开发已读入书写坐标的图形数据; 将书写坐标转换为磁盘坐标; 针对记录区域/胶片的每个轨道生成激光驱动图案,以基于所形成的图形数据将所述第二可见图形写在所述盘坐标上; 并且基于激光驱动图案驱动激光,从而照射光盘以将第二可见图形写入记录区域/胶片中,以将第一可见图形改变为第二可视图形。
    • 49. 发明授权
    • Magneto-optical disk and process for manufacturing the same
    • 磁光盘及其制造方法
    • US5179546A
    • 1993-01-12
    • US631984
    • 1990-12-21
    • Yumiko AnzaiYoshinori MiyamuraToshio NiiharaHarukazu MiyamotoNorio Ohta
    • Yumiko AnzaiYoshinori MiyamuraToshio NiiharaHarukazu MiyamotoNorio Ohta
    • G11B11/10G11B7/26G11B11/105
    • G11B11/10584G11B11/10582G11B7/26
    • A magneto-optical disk which has a circular disk form and comprises a substrate provided with information pits and a guide groove, a recording medium layer provided on the substrate, and a protective layer formed of at least one thin film on the medium layer, in which the surface of the protective layer is minutely roughened to have a concave rough pattern and not to substantially protrude beyond a reference level composed of the outermost surface portions of the protective layer. When the magneto-optical disk is subjected to recording by a CSS system using an air floating magnetic head conforming to high-frequency recording in a magnetic field modulation type recording, which is one of methods of overwrite recording on magneto-optical disks, the minute concave rough pattern formed on the surface of the disk substrate prevents such troubles as adhesion of the magnetic head to the surface of the disk and collision between the disk substrate being rotated and the head.
    • 一种具有圆盘形状并包括设置有信息凹坑的衬底和引导槽的磁光盘,设置在衬底上的记录介质层和由介质层上的至少一层薄膜形成的保护层, 其保护层的表面被微小地粗糙化以具有凹形粗糙图案,并且基本上不突出超过由保护层的最外表面部分组成的基准水平。 当磁光盘通过使用在磁光调制型记录中的符合高频记录的空气浮动磁头的CSS系统进行记录时,其是在磁光盘上重写记录的方法之一,分钟 形成在盘基板表面上的凹形粗糙图案防止了磁头粘附到盘表面和盘基片旋转与头部之间的碰撞等问题。