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    Medium and method for recording optical information
    1.
    发明授权
    Medium and method for recording optical information 有权
    介质和记录光信息的方法

    公开(公告)号：US06507547B1

    公开(公告)日：2003-01-14

    申请号：US09531208

    申请日：2000-03-20

    申请人： Yoshikazu Takagishi ,  Takanori Yoshizawa ,  Kazuyuki Shibuya ,  Emiko Hamada

    发明人： Yoshikazu Takagishi ,  Takanori Yoshizawa ,  Kazuyuki Shibuya ,  Emiko Hamada

    IPC分类号： G11B700

    CPC分类号： G11B7/00455 ,  G11B7/24 ,  G11B7/2472 ,  G11B7/2531 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/259

    摘要： Provided is a medium for recording optical information and a method for recording optical information that allow recording sensitivity to be increased, and particularly a prescribed recording sensitivity to be maintained together with reflectivity and other playback characteristics during high-speed recording, by employing the temperature dependence of recording sensitivity of the light-absorbing layer instead of the light attenuation coefficient of the light-absorbing layer, and selecting a material which is prone to increased absorption of a laser beam at high temperatures during recording. A distinctive feature is that the absorbance or recording sensitivity of the dye material film used in the medium for recording optical information that has a writable structure is dependent on temperature. Specifically, it was found that the absorption spectrum of the dye material varies at high temperatures, and a relation A2/A1≧1.30 was established. In this relation, A1 (Abs) is an absorbance of the light-absorbing layer at a wavelength of recording light under room-temperature conditions, T (°C.) is a pyrolysis temperature of the light-absorbing layer, and A2 (Abs) is an absorbance at a wavelength of recording light under T−50 (°C.) conditions.

    摘要翻译： 提供了一种用于记录光学信息的介质和用于记录允许记录灵敏度增加的光学信息的方法，特别是在高速记录期间通过采用温度依赖性与特定的记录灵敏度一起保持与反射率和其他重放特性 记录光吸收层的灵敏度而不是光吸收层的光衰减系数，并且在记录期间选择易于增加激光束在高温下的吸收的材料。 特别的特征是用于记录具有可写结构的光学信息的介质中的染料材料膜的吸光度或记录灵敏度取决于温度。 具体地说，发现染料的吸收光谱在高温下变化，建立了A2 / A1> = 1.30的关系。 在这种关系中，A1（Abs）是在室温条件下记录光波长处的光吸收层的吸光度，T（℃）是光吸收层的热解温度，A2（Abs ）是在T-50（℃）条件下记录光的波长处的吸光度。

    Optical information recording medium
    2.
    发明授权
    Optical information recording medium 有权
    光信息记录介质

    公开(公告)号：US06168844A

    公开(公告)日：2001-01-02

    申请号：US09128085

    申请日：1998-08-03

    申请人： Yoshikazu Takagishi ,  Takanori Yoshizawa ,  Emiko Hamada

    发明人： Yoshikazu Takagishi ,  Takanori Yoshizawa ,  Emiko Hamada

    IPC分类号： B32B302

    CPC分类号： G11B7/24 ,  G11B7/245 ,  G11B7/2472 ,  G11B7/248 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2585 ,  G11B7/2595 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

    摘要： By keeping the imaginary number portion k of the complex index of refraction of the film of the light absorbing layer 3, the mean film thickness dav of the light absorbing layer 3, and the absorbency A related thereto within an appropriate range, the present invention provides an optical information recording medium with good recording sensitivity and playback properties, which makes possible high speed recording by increasing the sensitivity to the recording beam and stable recording with sufficient reflectivity, and which can reduce jitter. In the present invention, 0.13≦A≦0.21 where A (Abs) is the absorbency of the light absorbing layer at the wavelength of the recording beam; and 6.0≦k.dav≦12.0 where k is the imaginary number portion of the complex index of refraction of the film in the light absorbing layer and dav (nm) is the mean film thickness of the light absorbing layer, at the wavelength of the recording beam.

    摘要翻译： 通过将光吸收层3的膜，光吸收层3的平均膜厚度dav和与其有关的吸光度A的复折射率的虚数部分k保持在适当的范围内，本发明提供 具有良好记录灵敏度和回放特性的光学信息记录介质，通过增加对记录光束的灵敏度和足够的反射率的稳定记录，可以实现高速记录，并且可以减少抖动。在本发明中，0.13 <= A < = 0.21其中A（Abs）是记录光束的波长处的光吸收层的吸光度; 和6.0 <= k.dav <= 12.0其中k是光吸收层中膜的复折射率的虚数部分，dav（nm）是光吸收层的平均膜厚度，在波长 的记录光束。

    Optical information medium and recording method therefor
    4.
    发明授权
    Optical information medium and recording method therefor 有权
    光信息媒体及其记录方法

    公开(公告)号：US06728198B2

    公开(公告)日：2004-04-27

    申请号：US10162300

    申请日：2002-06-04

    申请人： Toru Fujii ,  Toshiaki Tajima ,  Yuji Tomizawa ,  Ryou Negishi ,  Emiko Hamada

    发明人： Toru Fujii ,  Toshiaki Tajima ,  Yuji Tomizawa ,  Ryou Negishi ,  Emiko Hamada

    IPC分类号： G11B724

    CPC分类号： G11B7/24079 ,  G11B7/24076

    摘要： An optical information medium made up of a transparent substrate capable of allowing a recording laser beam to penetrate therethrough; a recording layer formed on the transparent substrate; and a reflective layer formed on the recording layer and reflecting a reproducing laser beam thereupon. A numerical aperture of an objective lens of an optical pickup for irradiating the recording laser beam on the recording layer is approximately 0.65, and the numerical aperture of an objective lens of the optical pickup for irradiating the recording laser beam on the reflection layer is approximately 0.60. An inclination angle &thgr; at both edges of the groove for tracking, being formed spirally on the surface of the transparent substrate on which the recording layer is formed, with respect to the main surface of the transparent substrate, is selected to be from 55° to 75°. An index ∝, expressed by 1−Dr/Ds when assuming that the depth of the groove on the transparent substrate is Ds and the depth of the recording layer at the position of said groove is Dr, is selected to be from 0.2 to 0.4. Further, the full width at half maximum of the groove on the transparent substrate is selected to be from one-third (⅓) to a half (½) of the pitch p of the groove. With this optical information medium, it is possible to record high density signals as signals that are readable optically, as well as to record them with stability.

    摘要翻译： 由能够使记录激光束透过的透明基板构成的光信息介质; 形成在所述透明基板上的记录层; 以及形成在记录层上并在其上反射再现激光束的反射层。 用于将记录激光束照射在记录层上的用于照射记录激光束的光学拾取器的物镜的数值孔径大约为0.65，用于将记录激光束照射在反射层上的光学拾取器的物镜的数值孔径大约为0.60 。 在形成有记录层的透明基板的表面上相对于透明基板的主表面螺旋地形成用于跟踪的凹槽的两个边缘处的倾斜角度θ选择为55°至 75°。 当假设透明基板上的凹槽的深度为Ds并且记录层在所述凹槽的位置的深度为Dr时，由1-Dr / Ds表示的折射率α被选择为0.2至0.4。 此外，透明基板上的凹槽的最大半宽选择为凹槽的间距p的三分之一（1/3）至半（1/2）。 利用该光学信息介质，可以将高密度信号记录为可光学读取的信号，并且可以稳定地记录它们。

    Optical information medium, stamper for manufacturing transparent substrate therefor and recording method therefor
    5.
    发明授权
    Optical information medium, stamper for manufacturing transparent substrate therefor and recording method therefor 有权
    光学信息介质，用于制造其透明基板的压模及其记录方法

    公开(公告)号：US06504815B1

    公开(公告)日：2003-01-07

    申请号：US09504267

    申请日：2000-02-15

    申请人： Toru Fujii ,  Emiko Hamada

    发明人： Toru Fujii ,  Emiko Hamada

    IPC分类号： G11B1100

    CPC分类号： G11B7/24085 ,  G11B7/00745 ,  G11B7/263

    摘要： An optical information medium is made up of a transparent substrate for a recording laser beam to penetrate therethrough, a recording layer formed on the transparent substrate, and a reflective layer for reflecting reproducing laser beam formed thereupon enabling the recording of optically readable signals by means of an incident recording laser from the transparent substrate. The transparent substrate has spiral-like tracking guides on the surface of the transparent substrate on which is formed the recording layer, and pre-pits indicative of address information are formed on a land portion defined between the tracking guides. The pre-pits are formed shifted from a center of the land. With this construction, the pre-pits open to a side of the tracking guide neighboring the land. With this, it is possible to read out address signals from the pre-pits with certainty when recording, and also to suppress errors due to mixing between the signals obtained from the pre-pits indicative of the address information and the recorded data read out from the pits on the tracking guides when reading the recorded optically readable signals.

    摘要翻译： 光信息介质由用于穿透其的记录激光束的透明基板，形成在透明基板上的记录层和用于反射在其上形成的再现激光束反射的反射层构成，使得能够通过以下方式记录光学可读信号： 来自透明基板的入射记录激光。 透明基板在其上形成记录层的透明基板的表面上具有螺旋形跟踪引导件，并且在跟踪引导件之间限定的台面部分上形成指示地址信息的预凹坑。 预制坑从地面中心转移。 通过这种结构，预留凹坑向邻近该陆地的跟踪指南的一侧开放。 由此，可以在记录时确定地读出来自预制凹坑的地址信号，并且还能够抑制由于从表示地址信息的预制坑获得的信号与从 当读取记录的光学可读信号时，跟踪引导件上的凹坑。

    Optical information medium
    6.
    发明授权
    Optical information medium 有权
    光信息媒体

    公开(公告)号：US06493312B1

    公开(公告)日：2002-12-10

    申请号：US09351845

    申请日：1999-07-13

    申请人： Ryou Negishi ,  Toshiaki Tajima ,  Toru Fujii ,  Emiko Hamada

    发明人： Ryou Negishi ,  Toshiaki Tajima ,  Toru Fujii ,  Emiko Hamada

    IPC分类号： G11B724

    CPC分类号： G11B7/00745 ,  G11B7/24 ,  G11B7/24079 ,  G11B7/24085

    摘要： An optical information medium is made up of a transparent substrate for a reproducing laser beam to penetrate therethrough, a recording layer formed on the transparent substrate and a reflective layer for reflecting the reproducing laser beam thereupon, thereby enabling the recording of optically readable signals by a recording laser beam incident upon the transparent substrate. This optical information medium has a spiral-like tracking guide on a side surface of the transparent substrate, on which the recording layer is formed, and on lands defined between the spiral-like tracking guide are formed land pre pits indicative of the sector information, including the address and so on, wherein the length of the land pre pits is selected to be from 50% to 83% of the length of the minimum pit and to be from 1.5 to 2.5 times the length of the channel clock. Also, the film thickness of the recording layer in the area of the land pre pits is selected to differ from the film thickness of the recording layer in the area of the tracking guide.

    摘要翻译： 光学信息介质由用于再现激光束透过的透明基板，形成在透明基板上的记录层和用于反射其上的再现激光束的反射层组成，从而能够通过光学可读信号记录光学可读信号 记录入射到透明基板上的激光束。 该光学信息介质在透明基板的形成有记录层的侧面上具有螺旋形跟踪引导件，并且在螺旋状跟踪引导件之间形成的焊盘上形成指示扇区信息的焊盘预先凹坑， 包括地址等，其中，土地预制坑的长度被选择为最小坑的长度的50％至83％，并且是通道时钟的长度的1.5至2.5倍。 此外，选择区域预凹坑区域中的记录层的膜厚度与跟踪引导件的区域中的记录层的膜厚度不同。

    Optical information medium
    7.
    发明授权
    Optical information medium 失效
    光信息媒体

    公开(公告)号：US06445676B1

    公开(公告)日：2002-09-03

    申请号：US08965875

    申请日：1997-11-07

    申请人： Toru Fujii ,  Yuji Tomizawa ,  Emiko Hamada

    发明人： Toru Fujii ,  Yuji Tomizawa ,  Emiko Hamada

    IPC分类号： G11B370

    CPC分类号： G11B23/40 ,  G11B7/24024 ,  G11B7/2467 ,  G11B7/2472 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2535 ,  G11B7/256 ,  G11B7/2585 ,  G11B7/2595 ,  G11B23/0042

    摘要： An optical information medium comprises a pair of discs which are bonded to each other, an optical recording layer provided on at least one of the discs, and a reflecting layer formed on an upper side of the optical recording layer. The optical information medium further includes an adhesive for bonding the pair of discs provided on the reflecting layer, wherein the adhesive has a thickness ranging from 10 to 80 &mgr;m. A protecting layer is provided on the upper side of the reflecting layer wherein the pair of discs may be bonded by the protecting layer. The optical recording layer, reflecting layer and protecting layer may be directly sequentially provided on the disc but another substrate layer may be inserted between these layers. There is employed, as the adhesive, those including a reactive curing resin or a hot melt material, and it is preferable that the shrinkage rate of the adhesive be less than 15%.

    摘要翻译： 光学信息介质包括彼此粘合的一对光盘，设置在至少一个光盘上的光学记录层以及形成在光学记录层的上侧上的反射层。 光学信息介质还包括用于粘合设置在反射层上的一对光盘的粘合剂，其中粘合剂具有10至80μm的厚度。 保护层设置在反射层的上侧，其中该一对光盘可被保护层粘合。 光记录层，反射层和保护层可以直接依次设置在盘上，而另一个基底层可以插入在这些层之间。 作为粘合剂使用包括反应性固化树脂或热熔性材料的粘合剂，并且粘合剂的收缩率优选小于15％。

    Optical information recording medium
    8.
    发明授权
    Optical information recording medium 有权
    光信息记录介质

    公开(公告)号：US06291045B1

    公开(公告)日：2001-09-18

    申请号：US09354908

    申请日：1999-07-16

    申请人： Toshiaki Tajima ,  Toru Fujii ,  Yuji Tomizawa ,  Emiko Hamada

    发明人： Toshiaki Tajima ,  Toru Fujii ,  Yuji Tomizawa ,  Emiko Hamada

    IPC分类号： B32B302

    CPC分类号： G11B7/2495 ,  G11B7/246 ,  G11B7/2467 ,  G11B7/2472 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2595 ,  G11B2007/24612 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

    摘要： An optical information recording medium having a recording layer comprising a dye layer containing a trimethine-based cyanine dye having nitro group attached to a benzene ring or to a naphthalene ring, both being bonded to indole ring, is capable of minimizing the second peak in relative to the main peak shown in FIG. 1, thus enabling the spectrum consisting of a main peak and a second peak to become sharp. The recording layer is capable of performing the recording and reading with a laser beam having a wavelength falling within a range of 620 nm to 690 nm.

    摘要翻译： 具有包含染料层的记录层的光学信息记录介质能够使相对于吲哚环结合的苯环或萘环上具有硝基的含有三甲基的花青染料的染料层能够最小化第二峰 到图1所示的主峰。 1，从而使得由主峰和第二峰组成的谱变得尖锐。 记录层能够用波长在620nm至690nm的范围内的激光束进行记录和读取。