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    Optical information recording medium and method of designing its structure
    2.
    发明授权
    Optical information recording medium and method of designing its structure 失效
    光信息记录介质及其结构设计方法

    公开(公告)号：US5424106A

    公开(公告)日：1995-06-13

    申请号：US45876

    申请日：1993-04-15

    申请人： Noboru Yamada ,  Nobuo Akahira ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Eiji Ohno ,  Shigeaki Furukawa

    发明人： Noboru Yamada ,  Nobuo Akahira ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Eiji Ohno ,  Shigeaki Furukawa

    IPC分类号： G11B7/006 ,  G11B7/24 ,  B32B3/00

    CPC分类号： G11B7/006 ,  G11B7/24 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21 ,  Y10T428/31678

    摘要： Phase-change-type optical recording medium comprises a first dielectric layer, a recording layer made of a phase change material, a second dielectric layer and a reflecting layer wherein the thicknesses of the first and second dielectric layers are determined for a given thickness of the recording layer so that the following conditions are satisfied;.DELTA.A+.DELTA.R.gtoreq.20% and .DELTA.A.gtoreq.5%wherein.DELTA.A=A(cry)-A(amo),A(cry), A(amo): light absorption rates of the recording layer in the crystal state and amorphous state, respectively,.DELTA.R=R(cry)-R(amo),R(cry) and R(amo): light reflection rates of the recording lates in the crystal state and amorphous state, respectively.

    摘要翻译： 相变型光学记录介质包括第一介质层，由相变材料制成的记录层，第二介电层和反射层，其中确定第一和第二介电层的厚度为给定的厚度 记录层，以满足以下条件; DELTA A + DELTA R> / = 20％和DELTA A> / = 5％其中DELTA A = A（cry）-A（amo），A（cry），A（amo）：记录层的光吸收率 晶体状态和非晶态分别为：晶体状态和非晶态的记录层的光反射率分别为：DELTA R = R（cry）-R（amo），R（cry）和R（amo）

    Optical information recording medium
    5.
    发明授权
    Optical information recording medium 失效
    光信息记录介质

    公开(公告)号：US5527661A

    公开(公告)日：1996-06-18

    申请号：US512131

    申请日：1995-08-07

    申请人： Nobuo Akahira ,  Eiji Ohno ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Yoshitaka Sakaue ,  Noboru Yamada

    发明人： Nobuo Akahira ,  Eiji Ohno ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Yoshitaka Sakaue ,  Noboru Yamada

    IPC分类号： G11B7/005 ,  G11B7/24 ,  G11B7/243

    CPC分类号： G11B7/24 ,  G11B7/0051 ,  G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B7/00557 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2595 ,  Y10S430/146

    摘要： An optical recording medium according to the present invention includes a substrate, and a recording film formed on the substrate, when receiving a laser beam for recording, the recording film taking either a first structural state or a second structural state according to the intensity of the laser beam; when receiving a laser beam for reproducing, the recording film partially changing the optical phase of the laser beam for reproducing according to the structural state, thereby changing the intensity of the laser beam for reproducing, wherein the optical absorbance of the recording film in the first structural state is substantially equal to that of the recording film in the second structural state, and the refractive index of the recording film in the first structural state is substantially different from that of the recording film in the second structural state.

    摘要翻译： 根据本发明的光记录介质包括基板和形成在基板上的记录膜，当接收用于记录的激光束时，根据记录膜的强度采用第一结构状态或第二结构状态的记录膜 激光束; 当接收到用于再现的激光束时，记录膜根据结构状态部分地改变用于再现的激光束的光学相位，由此改变用于再现的激光束的强度，其中记录膜在第一 结构状态基本上等于第二结构状态下的记录膜的结构状态，并且在第一结构状态下的记录膜的折射率与第二结构状态下的记录膜的折射率基本不同。

    Data storage apparatus
    6.
    发明授权
    Data storage apparatus 失效
    数据存储装置

    公开(公告)号：US5956308A

    公开(公告)日：1999-09-21

    申请号：US986492

    申请日：1997-12-08

    申请人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

    发明人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B19/12 ,  G11B19/247 ,  G11B19/26 ,  G11B19/28 ,  G11B20/12

    CPC分类号： G11B7/00454 ,  G11B19/26 ,  G11B7/0079 ,  G11B7/00745

    摘要： A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk is driven at a rotational velocity whereby the angular velocity is constant within any single zone but decreases as the radial position of the zone of the accessed track approaches the outside circumference of the disk. During reproducing, the disk is driven at a rotational velocity whereby the angular velocity is constant in all zones. The range of change in the relative linear velocity of the head to the track is thus smaller and the change in the recording conditions is less during recording. During reproducing, there is no delay time required for rotational control of the disk, and the desired track can be more quickly accessed.

    摘要翻译： 磁盘上的轨道在其径向位置被分成多个同心区域。 在记录期间，角速度根据被记录的区域而变化，并且以旋转速度驱动盘，其中角速度在任何单个区域内是恒定的，但随着被访问的轨道的区域的径向位置接近外部而减小 盘的周长。 在再现期间，以旋转速度驱动盘，其中角速度在所有区域中是恒定的。 因此，磁头与磁道的相对线速度的变化范围变小，记录时记录条件的变化较小。 在再现期间，不需要用于盘的旋转控制的延迟时间，并且可以更快速地访问期望的轨道。

    Optical information recording medium having first and second tracks and apparatus for recording to and reproducing from the medium
    7.
    发明授权
    Optical information recording medium having first and second tracks and apparatus for recording to and reproducing from the medium 失效
    具有第一和第二轨道的光学信息记录介质和用于记录到介质并从介质再现的设备

    公开(公告)号：US5517485A

    公开(公告)日：1996-05-14

    申请号：US202442

    申请日：1994-02-28

    申请人： Kenichi Nishiuchi ,  Nobuo Akahira ,  Noboru Yamada ,  Eiji Ohno

    发明人： Kenichi Nishiuchi ,  Nobuo Akahira ,  Noboru Yamada ,  Eiji Ohno

    IPC分类号： G11B7/007 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B7/00745 ,  G11B7/00718 ,  G11B11/10565

    摘要： An optical information recording medium includes: a substrate including first tracks having a first face and second tracks having a second face, the first face and the second face being optically at different positions in a direction of an incident light beam; and a recording layer provided on the substrate on which an optically detectable change is caused by irradiating the light beam; wherein the first and second tracks have an information recording area and an address area having a control information for the information recording area in a direction of the tracks, the address area has address pits in a part of the first tracks, the address pits being formed in a pattern according to specified code signals, and the information recording area has an portion on which information is recorded, the portion including at least the second tracks.

    摘要翻译： 光学信息记录介质包括：基板，包括具有第一面的第一轨道和具有第二面的第二轨道，所述第一面和所述第二面在入射光束的方向上在光学上位于不同的位置; 以及设置在基板上的记录层，通过照射光束在其上引起可光学检测的变化; 其中所述第一和第二轨道具有信息记录区域和地址区域，所述地址区域具有在所述轨道的方向上的所述信息记录区域的控制信息，所述地址区域在所述第一轨道的一部分中具有地址坑，所述地址坑被形成 在根据指定的代码信号的图案中，信息记录区域具有记录有信息的部分，该部分至少包括第二轨道。

    Optical information recording method
    8.
    发明授权
    Optical information recording method 失效
    光信息记录方法

    公开(公告)号：US5289453A

    公开(公告)日：1994-02-22

    申请号：US937101

    申请日：1992-08-31

    申请人： Eiji Ohno ,  Kenichi Nishiuchi ,  Noboru Yamada ,  Nobuo Akahira

    发明人： Eiji Ohno ,  Kenichi Nishiuchi ,  Noboru Yamada ,  Nobuo Akahira

    IPC分类号： G11B7/0045 ,  G11B7/24 ,  G11B7/243 ,  G11B7/258 ,  G11B7/00

    CPC分类号： G11B7/00454 ,  G11B7/24 ,  G11B7/243 ,  G11B7/258

    摘要： An optical information recording method in which a digital signal subjected to pulse width modulation is overwritten, by using one laser spot, on an optical disk including a first dielectric film, a recording film, a second dielectric film and a reflecting film stacked on a substrate in this order; the recording film having composition defined by a formula Ge.sub.x Sb.sub.y Te.sub.z satisfying 45.ltoreq.z.ltoreq.55.5, 0.5.ltoreq.y/(x+y).ltoreq.0.72 and x+y+z=100; the recording film having a thickness of 10 to 35 nm; the second dielectric film having a thickness of 5 to 40 nm; the reflecting film having a thickness of 35 nm or more; the optical information recording method comprising the steps of: converting each of a plurality of pulses contained in the digital signal, into a pulse train composed of pulses; and modulating a laser power between an erasing level and a recording level so as to overwrite the digital signal on the optical disk.

    摘要翻译： 一种光信息记录方法，其中通过使用一个激光点将经受脉冲宽度调制的数字信号重写在包括堆叠在基板上的第一电介质膜，记录膜，第二电介质膜和反射膜的光盘上 按此顺序 该记录膜具有由式GexSbyTez满足45≤Z≤55.5,0.5≤y/（x + y）<= 0.72和x + y + z = 100定义的组成。 记录膜的厚度为10〜35nm; 所述第二电介质膜的厚度为5〜40nm; 反射膜的厚度为35nm以上; 光信息记录方法包括以下步骤：将包含在数字信号中的多个脉冲中的每一个转换成由脉冲组成的脉冲串; 以及调制擦除电平和记录电平之间的激光功率，以覆盖光盘上的数字信号。

    Optical information recording apparatus for recording an input signal having variable width pulse duration and pulse spacing periods
    10.
    发明授权
    Optical information recording apparatus for recording an input signal having variable width pulse duration and pulse spacing periods 失效
    光信息记录装置，用于记录具有可变宽度脉冲持续时间和脉冲间隔周期的输入信号

    公开(公告)号：US5150351A

    公开(公告)日：1992-09-22

    申请号：US712031

    申请日：1991-06-07

    申请人： Eiji Ohno ,  Kenichi Nishiuchi ,  Noboru Yamada ,  Kenzou Ishibashi ,  Kunio Kimura ,  Nobuo Akahira

    发明人： Eiji Ohno ,  Kenichi Nishiuchi ,  Noboru Yamada ,  Kenzou Ishibashi ,  Kunio Kimura ,  Nobuo Akahira

    IPC分类号： G11B7/006 ,  G11B20/10

    CPC分类号： G11B7/006 ,  G11B20/10009

    摘要： A recording apparatus overwrites an input signal having pulse duration periods and pulse spacing periods to an optical disk by irradiation of a laser beam to form recording marks corresponding to the pulse duration periods. The apparatus includes a detector for detecting a leading edge of the pulse duration period and for producing a start signal thereupon, another detector for detecting a trailing edge of the pulse duration period and for producing a stop signal thereupon, a pattern setting circuit for setting a predetermined basic pattern, and a pattern generator for generating the basic pattern from its beginning in response to the start signal and for terminating the generation of the basic pattern in response to the stop signal. The apparatus further includes a circuit for forming a modulated signal using a full or portion of the basic pattern produced from the pattern generator. The laser output is produced in accordance with the modulated signal.

    摘要翻译： 记录装置通过照射激光束将具有脉冲宽度周期和脉冲间隔周期的输入信号重写成光盘，以形成对应于脉冲持续时间段的记录标记。 该装置包括检测器，用于检测脉冲持续时间段的前沿并产生一个起始信号，另一个检测器，用于检测脉冲持续时间段的后沿并产生一个停止信号，一个模式设置电路，用于设置一个 预定的基本模式，以及用于响应于起始信号从其开始产生基本模式并响应于停止信号终止生成基本模式的模式发生器。 该装置还包括用于使用从图案发生器产生的全部或部分基本图案形成调制信号的电路。 根据调制信号产生激光输出。