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    • 6. 发明授权
    • Optical recording medium and a method for testing the same
    • 光记录介质及其测试方法
    • US07580340B2
    • 2009-08-25
    • US11287323
    • 2005-11-28
    • Hiroshi ShingaiJiro YoshinariHideaki Miura
    • Hiroshi ShingaiJiro YoshinariHideaki Miura
    • G11B7/24
    • G11B7/243G11B7/00375G11B7/006G11B7/259G11B2007/24312G11B2007/24314
    • An optical recording medium and a method for testing that optical recording medium are provided, which can prevent degradation of a reproduction signal in the case where the optical recording medium is stored at a high temperature for a long time, which enables stable recording and reproduction of data before and after the high-temperature storage, and which can achieve high-speed recording and increase of recording density. In the optical recording medium, a reproduction signal output of a recording mark after high-temperature storage that is formed in a recording layer after the optical recording medium is stored at a storage temperature t in a range from 60° C. to 90° C. for at least 50−(4/3)(t−60) hours is 0.9 times or more a reproduction signal output of a recording mark before the high-temperature storage that has the same bit length as the recording mark after the high-temperature storage and is formed before the above high-temperature storage.
    • 提供一种用于测试该光记录介质的光学记录介质和方法,其可以防止光记录介质长时间在高温下存储的情况下的再现信号的劣化,这使得能够稳定地记录和再现 数据在高温存储之前和之后,并且可以实现高速记录和增加记录密度。 在光记录介质中,在光记录介质在形成于光记录介质的存储温度t在60℃至90℃的范围内的高温储存之后的记录标记的再现信号输出 对于至少50-(4/3)(t-60)小时,在高温存储之前的记录标记的再现信号输出是与高速存储器之后的记录标记相同的位长度的0.9倍或更多, 在上述高温储存之前形成。
    • 9. 发明申请
    • Method for recording information on optical recording medium
    • 在光学记录介质上记录信息的方法
    • US20060245326A1
    • 2006-11-02
    • US11407993
    • 2006-04-21
    • Jiro YoshinariHideaki MiuraHiroshi Shingai
    • Jiro YoshinariHideaki MiuraHiroshi Shingai
    • G11B7/0045
    • G11B7/0062
    • A method for recording information on an optical recording medium is provided so that it is satisfied that 0.16≦(Lv×Tcool)/(λ/NA)≦0.30 and 0.06≦(Lv×Ttop)/(λ/NA)≦0.14, where λ is a write wavelength of a laser beam used to irradiate the recording layer of a phase-change optical recording medium, NA is a numerical aperture of an objective lens used for irradiation with the laser beam, Lv is a relative speed between the objective lens and the optical recording medium, Tcool is a pulse time of a cooling pulse inserted immediately following a leading write pulse, and Ttop is a leading write pulse time. The method allows for forming a record mark with a good shape and prevents fluctuations at the front edge of the record mark, which would be otherwise caused by the recrystallization of the recording film being held at a high temperature.
    • 提供了一种用于在光学记录介质上记录信息的方法,使得满足0.16 <=(L / V)xT /(λ/ NA)<= 0.30 和(λ/ NA)<= 0.14,其中λ是用于照射记录层的激光束的写入波长 相变光记录介质的NA是用于照射激光束的物镜的数值孔径,L是物镜和光记录介质之间的相对速度,T 冷却是紧跟引导写入脉冲之后插入的冷却脉冲的脉冲时间,而顶部是前置写入脉冲时间。 该方法允许形成具有良好形状的记录标记,并且防止记录标记的前边缘处的波动,否则会由于记录膜的再结晶保持在高温而引起。
    • 10. 发明授权
    • Method of recording data on optical recording media and optical recording device
    • 在光学记录介质和光学记录装置上记录数据的方法
    • US07742374B2
    • 2010-06-22
    • US11167291
    • 2005-06-28
    • Tetsuro MizushimaTatsuya KatoHiroshi ShingaiHideaki MiuraJiro Yoshinari
    • Tetsuro MizushimaTatsuya KatoHiroshi ShingaiHideaki MiuraJiro Yoshinari
    • G11B7/00
    • G11B7/00456G11B2007/0013
    • A method of recording data on a double-layer optical recording medium having a recording layer with high light transmittance is provided. A laser beam is modulated to emit a pulse series of laser including a write pulse of a write power and a cooling pulse of a bottom power, so as to encode and write data to be recorded as recording marks of a length nT along a track of the recording layer, where n is an integer and T is one clock cycle. An nT recording mark is formed using (n−1) write pulse(s), and when forming a recording mark of 4 T or longer, a cooling pulse with a pulse width of 0.8 T to 2 T is inserted before the last write pulse. Recording marks are thereby accurately formed without heat interference between consecutive recording marks and cross erase between recording marks of adjacent tracks.
    • 提供了一种在具有高透光性的记录层的双层光学记录介质上记录数据的方法。 激光束被调制以发射包括写入功率的写入脉冲和底部功率的冷却脉冲的脉冲序列,以便将要记录的数据编码和写入作为长度为nT的记录标记沿着 记录层,其中n是整数,T是一个时钟周期。 使用(n-1)个写入脉冲形成nT记录标记,当形成4T以上的记录标记时,在最后写入脉冲之前插入脉冲宽度为0.8T〜2T的冷却脉冲 。 因此,可以精确地形成记录标记,而不会在连续记录标记之间产生热干扰,并且在相邻轨道的记录标记之间进行交叉擦除。