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    Optical information medium
    1.
    发明授权
    Optical information medium 有权
    光信息媒体

    公开(公告)号：US06677104B2

    公开(公告)日：2004-01-13

    申请号：US09779513

    申请日：2001-02-09

    申请人： Tetsuro Mizushima ,  Hiroyasu Inoue ,  Hiroshi Shingai ,  Hajime Utsunomiya

    发明人： Tetsuro Mizushima ,  Hiroyasu Inoue ,  Hiroshi Shingai ,  Hajime Utsunomiya

    IPC分类号： G11B724

    CPC分类号： G11B7/258 ,  G11B7/24 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2585 ,  G11B7/259 ,  G11B7/2595 ,  G11B11/10584 ,  Y10S430/146

    摘要： Noise of the read-out signal is reduced in an optical information medium comprising a supporting substrate and a reflective layer disposed on the supporting substrate wherein the reading beam irradiates the medium from the side where the reflective layer is formed. In addition, noise of the read-out signal is reduced without adversely affecting the recording properties in an optical information medium comprising a supporting substrate, and a reflective layer and a recording layer disposed on the supporting substrate in this order wherein the recording beam irradiates the medium from the side where the reflective layer is formed. In the medium, the reflective layer has a crystallite size of up to 30 nm.

    摘要翻译： 在包括支撑基板和设置在支撑基板上的反射层的光学信息介质中，读出信号的噪声减小，其中读取光束从形成反射层的一侧照射介质。 此外，减少读出信号的噪声，而不会对包括支撑衬底的光学信息介质以及设置在支撑衬底上的反射层和记录层的光学信息介质的记录特性产生不利影响，其中记录光束照射 介质从反射层形成的一侧。 在介质中，反射层的微晶尺寸高达30nm。

    Optical recording medium and its designing method
    2.
    发明授权
    Optical recording medium and its designing method 失效
    光记录介质及其设计方法

    公开(公告)号：US06618349B2

    公开(公告)日：2003-09-09

    申请号：US09788589

    申请日：2001-02-21

    申请人： Hiroyasu Inoue ,  Hajime Utsunomiya ,  Hiroshi Shingai ,  Tetsuro Mizushima ,  Tatsuya Kato

    发明人： Hiroyasu Inoue ,  Hajime Utsunomiya ,  Hiroshi Shingai ,  Tetsuro Mizushima ,  Tatsuya Kato

    IPC分类号： G11B700

    CPC分类号： G11B7/007

    摘要： In an optical recording medium of land/groove recording system, a sufficient tilt margin and a reduced cross talk are realized simultaneously with a sufficiently increased output. Provided is an optical recording medium having a light-transmitting substrate formed with grooves wherein the grooves and the region between adjacent grooves are used for the recording track, and a reading beam is irradiated through the light-transmitting substrate, wherein the relations: −12.6T+15.6≦x≦25T−3.8, and 0.55≦T≦0.68 are satisfied when the reading beam has a wavelength of &lgr;, the light-transmitting substrate has a refractive index at the wavelength &lgr; of n, the reading optical system has a numerical aperture of NA, recording track pitch is PT, the groove has a depth of &lgr;/(x·n), and T is PT/(&lgr;/NA).

    摘要翻译： 在平台/凹槽记录系统的光记录介质中，充分提高输出同时实现足够的倾斜余量和减少的串扰。 提供了一种光记录介质，其具有形成有沟槽的光透射基板，其中沟槽和相邻凹槽之间的区域用于记录轨道，并且通过透光基板照射读取光束，其中满足关系： 当读取光束具有lambd的波长时，透光衬底的折射率为n的波长，读取光学系统具有NA的数值孔径，记录轨道间距为PT，槽具有lambd的深度 /（xn），T为PT /（lambd / NA）。

    Optical recording method and optical recording medium
    4.
    发明授权
    Optical recording method and optical recording medium 有权
    光记录方法和光记录介质

    公开(公告)号：US06999392B2

    公开(公告)日：2006-02-14

    申请号：US09971703

    申请日：2001-10-09

    申请人： Tatsuya Kato ,  Hajime Utsunomiya ,  Hiroyasu Inoue ,  Hiroshi Shingai ,  Yoshitomo Tanaka

    发明人： Tatsuya Kato ,  Hajime Utsunomiya ,  Hiroyasu Inoue ,  Hiroshi Shingai ,  Yoshitomo Tanaka

    IPC分类号： G11B7/00 ,  G11B7/24

    CPC分类号： G11B7/24085 ,  G11B7/00454 ,  G11B7/006

    摘要： Increase of jitter in a phase change optical recording medium is suppressed with no extreme decrease in the crystallization speed of the recording layer when the medium is overwritten at a high linear velocity. In addition, in a disk-shaped medium operated at a constant angular velocity, the overwriting is accomplished with the increase of jitter suppressed over the entire area of the medium. Provided is an optical recording method for recording a disk-shaped optical recording medium having a phase change recording layer which is rotated at a constant angular velocity, wherein amorphous recorded marks are formed in the recording layer. In this method, the minimum recorded mark is formed such that WL/ML incrementally or gradually decreases from the radially inner side to the radially outer side of the optical recording medium, when the minimum signal has a length of SL, and when the minimum recorded mark corresponding to said minimum signal has its maximum width of MW, EW is 0.1 MW; the position on the leading edge side of the recorded mark at the width of EW is designated effective leading edge; and the position on the trailing edge side of the recorded mark at the width of EW is designated effective trailing edge; the distance between the effective leading edge and the effective trailing edge is designated effective length ML; and the distance between the effective leading edge and the position at which the width starts to decrease on the trailing edge side is designated WL.

    摘要翻译： 当以高线速度重写介质时，抑制了相变光记录介质中的抖动的增加，而在记录层的结晶速度没有极度降低的情况下。 另外，在以恒定的角速度操作的盘形介质中，通过在介质的整个区域上抑制的抖动的增加来实现重写。 提供了一种用于记录具有以恒定角速度旋转的相变记录层的盘形光学记录介质的光学记录方法，其中在记录层中形成非晶体记录标记。 在该方法中，形成最小记录标记，使得W L L / M L L从光记录介质的径向内侧向径向外侧逐渐地逐渐减小 当最小信号具有长度为S L L时，当对应于所述最小信号的最小记录标记具有M W的最大宽度时，E W 为0.1MW; 记录标记的前缘侧的位置在E 的宽度被指定为有效前沿; 并且在E＆lt; W＆gt;宽度的记录标记的后缘侧的位置被指定为有效后缘; 有效前沿和有效后沿之间的距离被指定为有效长度M L L; 并且有效前沿与后缘侧宽度开始减小的位置之间的距离被指定为W L L。

    Optical information medium including an information bearing surface and a functional layer, and reading method
    7.
    发明授权
    Optical information medium including an information bearing surface and a functional layer, and reading method 有权
    包括信息承载面和功能层的光信息介质，以及读取方法

    公开(公告)号：US07701838B2

    公开(公告)日：2010-04-20

    申请号：US11168475

    申请日：2005-06-29

    申请人： Takashi Kikukawa ,  Hajime Utsunomiya ,  Hiroshi Shingai ,  Tatsuya Kato

    发明人： Takashi Kikukawa ,  Hajime Utsunomiya ,  Hiroshi Shingai ,  Tatsuya Kato

    IPC分类号： G11B7/24

    CPC分类号： G11B7/24085 ,  B82Y10/00 ,  G11B7/0052 ,  G11B7/24

    摘要： In an optical information medium having an information bearing surface having projections and depressions and/or capable of forming recorded marks, a functional layer is added. The information borne on the information bearing surface can be read by using reading light of a wavelength longer than 4NA·PL wherein PL is the minimum size of the projections and depressions or the recorded marks and NA is the numerical aperture of a reading optical system, setting the power of the reading light within such a range that the functional layer does not change its complex index of refraction, and irradiating the reading light to the information bearing surface constructed by the functional layer or to the information bearing surface through the functional layer or to the functional layer through the information bearing surface. The medium enables reading at a high resolution beyond the diffraction limit.

    摘要翻译： 在具有具有凹凸和/或能够形成记录标记的信息承载面的光信息介质中，添加功能层。 可以通过使用波长大于4NA·PL的读取光读取信息承载面上的信息，其中PL是凹凸或记录标记的最小尺寸，NA是读取光学系统的数值孔径， 将读取光的功率设定在功能层不改变其复杂折射率的范围内，并且通过功能层将读取光照射到由功能层构成的信息承载面或信息承载面，或 通过信息轴承表面到功能层。 该介质能够以超过衍射极限的高分辨率进行读取。

    Optical recording medium
    9.
    发明授权
    Optical recording medium 失效

    公开(公告)号：US07083894B2

    公开(公告)日：2006-08-01

    申请号：US10460167

    申请日：2003-06-13

    申请人： Hiroshi Shingai ,  Hajime Utsunomiya

    发明人： Hiroshi Shingai ,  Hajime Utsunomiya

    IPC分类号： G11B7/24

    CPC分类号： G11B7/243 ,  G11B2007/24306 ,  G11B2007/24314 ,  Y10S430/146 ,  Y10T428/12701

    摘要： There is provided an optical recording medium having a phase-change recording layer formed based on a drastically new concept of making the content of Mn still higher than the prior art while using Sb as a main component. The optical recording medium has a recording layer composed of a plurality of elements, and the recording layer contains Sb, and also has an Mn content of more than 20 atomic % but not more than 40 atomic %, on condition that the total amount of all the elements composing the recording layer is 100 atomic %.