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    • 71. 发明授权
    • Magneto-optical recording apparatus using the magnetic field modulation
method
    • 使用磁场调制方法的磁光记录装置
    • US5331612A
    • 1994-07-19
    • US922854
    • 1992-07-31
    • Yoshiteru MurakamiKenji OhtaAkira Takahashi
    • Yoshiteru MurakamiKenji OhtaAkira Takahashi
    • G11B5/02G11B11/10G11B11/105G11B13/04
    • G11B11/10521G11B11/10508G11B11/1051G11B11/10528G11B11/1053G11B11/10595
    • A magneto-optical recording apparatus which records information through the processes of: first irradiating a light beam onto a magneto-optical recording medium having a recording film; and next applying an external magnetic field that is inverted in response to a recording signal onto the recording film while continuing the first process. In the above arrangement, the intensity of the light beam is dropped upon inversion of the external magnetic field so that information is not recorded. The intensity of the light beam is raised during non-inversion of the external magnetic field so that information is recorded. Further the magneto-optical recording apparatus is provided with a light intensity control device for varying the intensity of the light beam dependent of the lengths of recording bits so that the high-temperature area of the recording film is not widened. Since the width of the recording bits is uniformly maintained, the remaining of the recording bit after overwriting operation can be reduced; thus, the signal quality in reproduction can be enhanced.
    • 一种磁光记录装置,其通过以下处理记录信息:首先将光束照射到具有记录膜的磁光记录介质上; 并且接着在继续进行第一处理的同时将响应于记录信号反转的外部磁场施加到记录膜上。 在上述布置中,光束的强度在外部磁场反转时下降,从而不记录信息。 在外部磁场的非反相期间,光束的强度升高,从而记录信息。 此外,磁光记录装置设置有光强度控制装置,用于根据记录位的长度改变光束的强度,使得记录膜的高温区域不会变宽。 由于记录位的宽度被均匀地保持,所以可以减少重写操作之后的记录位的剩余部分。 因此,可以提高再现中的信号质量。
    • 74. 发明授权
    • Magnetic recording/reproduction device and magnetic recording medium
    • 磁记录/再现装置和磁记录介质
    • US08760784B2
    • 2014-06-24
    • US13157646
    • 2011-06-10
    • Toshihiko SakaiYoshiteru Murakami
    • Toshihiko SakaiYoshiteru Murakami
    • G11B5/09
    • G11B5/02B82Y10/00G11B5/746G11B2005/0005
    • Disclosed is a magnetic recording/reproduction device 2 including: a recording/reproduction head 7; and a recording/reproduction head 7 for detecting a leakage magnetic field of each of the plurality of magnetic recording cells 1 so as to reproduce information, the recording/reproduction head 7 carrying out the recording on the magnetic recording medium 4 so that the magnetic recording medium 4 includes continuous recording regions that (i) satisfy Nmin≧2 and that (ii) include a continuous recording region that satisfies N≠n×Nmin, where N represents a number of magnetic recording cells 1 in a continuous recording region; Nmin represents a minimum value for N; and n represents a positive integer, the continuous recording regions each being a region on a reproduction track in which region magnetic recording cells 1 sharing an identical magnetization direction are sequentially arranged in a circumferential direction of the magnetic recording medium 4.
    • 公开了一种磁记录/再现装置2,包括:记录/再现头7; 以及记录/再现头7,用于检测多个磁记录单元1中的每个磁记录单元1的泄漏磁场以再现信息,记录/再现头7在磁记录介质4上执行记录,使得磁记录 介质4包括(i)满足Nmin≥2并且(ii)包括满足N≠n×Nmin的连续记录区域的连续记录区域,其中N表示连续记录区域中的磁记录单元1的数量; Nmin表示N的最小值; 并且n表示正整数,连续记录区域各自是在磁记录介质4的圆周方向上顺序地布置有共享相同磁化方向的区域磁记录单元1的再现轨道上的区域。