Adaptive recording method and apparatus for high-density optical recording, and control method therefor
    33.
    发明公开
    Adaptive recording method and apparatus for high-density optical recording, and control method therefor 有权
    用于高密度记录设备和控制方法自适应记录设备及其方法

    公开(公告)号:EP1061509A3

    公开(公告)日:2003-01-15

    申请号:EP00304975.6

    申请日:2000-06-13

    发明人: Seo, Jin-gyo

    IPC分类号: G11B7/125 H01S5/0683 G11B7/00

    摘要: There is provided an adaptive recording method for recording binary data having marks and spaces by irradiating a light signal onto an optical recording medium and adaptively adjusting the power of the light signal according to the correlativity between the length of a mark currently being recorded and the lengths of leading/trailing spaces, the adaptive recording method including the steps of (a) checking the output characteristics of a light signal generating apparatus for generating the light signal, and (b) controlling the power of the light signal by referring to the power of the light signal corresponding to the correlativity and the output characteristics in recording the data on the optical recording medium. The adaptive recording method allows accurate recording control by updating light output control data with respect to a power setting value according to variation in the output characteristic of the laser diode.

    Magneto-optisches Speichermedium mit Doppelmaskierung

    公开(公告)号:EP0974962A2

    公开(公告)日:2000-01-26

    申请号:EP99201947.1

    申请日:1999-06-18

    IPC分类号: G11B11/10

    摘要: Ein magneto-optisches Speichermedium zum mehrfachen Schreiben von Informationen bei einer Schreibtemperatur T w oder zwei Schreibtemperaturen T h , T l oberhalb der Raumtemperatur T a und zum mehrfachen Lesen bei einer Temperatur T m mit einer Frontmaskierung bei der Temperatur T f und einer Rückmaskierung bei einer Temperatur T r oberhalb der Raumtemperatur T a in einem externen Magnetfeld H e , das ein Substrat, eine auf dem Substrat angeordneten ersten magnetischen Schicht mit einer temperaturabhängigen Koerzitivfeldstärke H C1 (T), der Kompensationstemperatur T cp1 und der Curie-Temperatur T C1 , eine auf der ersten magnetischen Schicht angeordneten zweiten magnetischen Schicht, einer temperaturabhängigen Koerzitivfeldstärke H C2 (T), der Kompensationstemperatur T cp2 und der Curie-Temperatur T C2 , und eine auf der zweiten magnetischen Schicht angeordneten dritten magnetischen Schicht, mit einer temperaturabhängigen Koerzitivfeldstärke H C3 (T), der Kompensationstemperatur T cp3 und der Curie-Temperatur T C3 umfaßt, wobei gilt: T a f m ≤ T cp1 ≤ T cp2 C2 r C1 cp3 C3 ≤ T w und H C1 (T) e für T a m H C2 (T) e für T a m H C3 (T) > H e für T w , zeichnet sich aufgrund eines verbesserten magneto-optischen Effektes durch ein hohes Signal/Rausch-Verhältnis aus.

    摘要翻译: 磁光存储装置具有具有不同居里温度的不同存储层的布置,使得可以实现高数据密度。 通过在不同温度下写入和读取数据来实现不同层的掩蔽。 四个磁性层布置中的三个是可能的,其中选择矫顽场强度,补偿温度和居里温度,使得这些层一起工作。

    Optical information recording and/or reproducing apparatus and method
    38.
    发明公开
    Optical information recording and/or reproducing apparatus and method 失效
    的装置和方法的光学记录和/或再现信息

    公开(公告)号:EP0762400A1

    公开(公告)日:1997-03-12

    申请号:EP96306233.6

    申请日:1996-08-28

    发明人: Kimura, Shunpei

    IPC分类号: G11B7/125

    摘要: Recording of information is performed by selectively forming a high-temperature level state and a low-temperature level state on a recording medium which is capable of an optical modulation overwrite operation to multi-value power levels on the basis of a multi-pulse recording waveform. A power level PHth of the light beam immediately before the high-temperature level state begins to be formed on the medium is detected and a minimum power level PLmin of the light beam, which can form the low-temperature level state on the medium, is detected. Then, the multi-pulse recording waveform is switched on the basis of the detected power levels PHth and PLmin. Upon recording of a non-overwrite recording medium, a power level Pth of the light beam immediately before recording begins on the medium is detected and a maximum reproduction power level Prmax of the light beam at which information recorded on the medium is not erased is detected. Then, the multi-value recording waveform is switched on the basis of the detected power levels Pth and Prmax.

    摘要翻译: 的信息记录进行通过选择性地形成在记录介质上的高温度水平的状态和低的温度水平状态的所有其能够光学调制重写手术多值功率电平的多脉冲记录波形的基础上的 , 光束紧接在高的温度水平状态之前的功率电平PHTH开始被检测到介质与所述光束,其可以形成在介质上的低的温度水平状态的最小功率电平PLmin上形成,是 检测。 然后,将多脉冲记录波形被检测到的功率水平和PHTH PLmin的基础上切换。 在非重写记录介质,一个功率电平P个光束立即记录在介质上开始之前检测到,并在记录在介质上哪些信息的光束的最大再生功率电平Prmax的不被擦除检测的记录 , 然后,将多值记录波形被检测到的功率电平第P和Prmax的基础上切换。

    Magneto-optical recording medium, and information recording/reproduction method using the medium
    39.
    发明公开
    Magneto-optical recording medium, and information recording/reproduction method using the medium 失效
    磁光记录介质,以及使用该介质的信息记录/再现方法

    公开(公告)号:EP0668585A3

    公开(公告)日:1995-09-27

    申请号:EP95300947.9

    申请日:1995-02-15

    IPC分类号: G11B11/10

    摘要: A magneto-optical recording medium includes a substrate on which light is incident, a first magnetic layer provided at the substrate side, and a second magnetic layer provided on the first magnetic layer. The first magnetic layer is an in-plane magnetization film at a room temperature and transits to a perpendicular magnetization film at a temperature between room temperature and a Curie temperature thereof. The second magnetic layer has a Curie temperature lower than that of the first magnetic layer and is a perpendicular magnetization film. A direction of magnetization of the first magnetic layer is anti-parallel to a direction of magnetization of the second magnetic layer in a state in which the first magnetic layer and second magnetic layer are stable each other by exchange-coupling.

    摘要翻译: 磁光记录介质包括光入射到其上的基板,设置在基板侧的第一磁性层和设置在第一磁性层上的第二磁性层。 第一磁性层是在室温下的平面内磁化膜并且在室温和其居里温度之间的温度下转移到垂直磁化膜。 第二磁性层的居里温度低于第一磁性层的居里温度,并且是垂直磁化膜。 在第一磁性层和第二磁性层通过交换耦合彼此稳定的状态下,第一磁性层的磁化方向与第二磁性层的磁化方向反平行。