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    • 12. 发明授权
    • Optical information recording medium and optical information
recording/reproducing method
    • 光信息记录介质和光信息记录/再现方法
    • US5811217A
    • 1998-09-22
    • US257470
    • 1994-06-09
    • Nobuo AkahiraKenichi NagataEiji OhnoKenichi NishiuchiNoboru Yamada
    • Nobuo AkahiraKenichi NagataEiji OhnoKenichi NishiuchiNoboru Yamada
    • G11B7/00G11B7/0045G11B7/005G11B7/24G11B7/241G11B7/254G11B7/257
    • G11B7/24G11B7/00454Y10S430/146
    • An optical information recording medium, which includes a substrate, and a recording thin film layer provided on the base material and adapted to form variation in an amount optically detectable by absorbing at least laser light so as to record information by partially varying the recording thin film layer and to reproduce the information by optically detecting the variation amount. The optical information recording medium further includes transparent layers each provided in contact with the recording thin film layer, and each of the transparent layers has optical thickness in which, in at least two different wavelengths .lambda., integral multiple of .lambda./2 is added to the thickness giving the large laser light absorption and large optical variation amount, respectively. More specifically, the optically detectable amount is of a reflectance factor variation, and in the different wavelengths .lambda.1 and .lambda.2, with respect to the thicknesses d1 and d2 of the transparent layers which give the optical characteristic more than 60% in the absorption, and more than 20% in the reflectance factor variation, the thickness of each transparent layer is arranged to be the thickness d having relation as represented by a following equation. d=d1+(.lambda.1/2).times.m=d2+(.lambda.2/2).times.1 (m, l: positive integer or zero).
    • 一种光学信息记录介质,其包括基板和设置在基材上的记录薄膜层,并且适于通过至少吸收激光来形成光学上可检测的量的变化,以便通过部分地改变记录薄膜来记录信息 并通过光学检测变化量再现信息。 光学信息记录介质还包括各自设置成与记录薄膜层接触的透明层,并且每个透明层具有光学厚度,其中在至少两个不同波长λ中的λ/ 2的整数倍被添加到 分别赋予大的激光吸收和大的光学变化量的厚度。 更具体地说,光学上可检测的量是反射率变化,并且在不同波长λ1和λ2中,相对于在吸收中给出大于60%的光学特性的透明层的厚度d1和d2, 和反射系数变化大于20%时,每个透明层的厚度被设置为具有如以下等式表示的关系的厚度d = d1 +(λ+ E,fra 1/2 + EE)xm = d2 +(λ+ E,fra 2/2 + EE)x1(m,l:正整数或零)。
    • 16. 发明授权
    • Optical information recording medium and its recording and reproducing method
    • 光信息记录介质及其记录和再现方法
    • US06388984B2
    • 2002-05-14
    • US09140296
    • 1998-08-25
    • Hideki KitauraNoboru YamadaKen'ichi NagataKenichi NishiuchiShigeaki Furukawa
    • Hideki KitauraNoboru YamadaKen'ichi NagataKenichi NishiuchiShigeaki Furukawa
    • G11B724
    • G11B7/00718G11B7/24G11B7/24079
    • A reflectance increasing type optical information recording medium in which the crosstalk is inhibited in the land and groove recording. This optical information recording medium comprises a substrate having a groove and a land provided between adjacent grooves and a recording layer that is provided on the substrate and that changes the reflectance by irradiation with light beams. In this recording medium, the reflectance after recording is greater than the reflectance before recording. Moreover, the depth D of the groove is set to be in the range of &lgr;/8n to 3&lgr;/8n, where the wavelength of the light beam is &lgr; and the refractive index of the substrate is n. And the difference, &Dgr;&phgr;=&phgr;1−&phgr;0, between the phase &phgr;1 of the reflected light after recording and the phase &phgr;0 of the reflected light before recording is in the range of (−0.1+2 m) &pgr; to (0.1+2 m) &pgr;, where m is an integer.
    • 反射率增加型光信息记录介质,其中在纹间和凹槽记录中阻止串扰。 该光学信息记录介质包括具有沟槽和设置在相邻沟槽之间的焊盘的衬底和设置在衬底上并通过照射光束来改变反射率的记录层。 在该记录介质中,记录后的反射率大于记录前的反射率。 此外,凹槽的深度D设定在lambd / 8n至3lambd / 8n的范围内,其中光束的波长为羔羊,并且基板的折射率为n。 并且记录后的反射光的相位phi1与记录前的反射光的相位phi0之间的差值DELTAphi = phi1-phi0在(-0.1 + 2m)pi到(0.1 +2μm)的范围内 pi,其中m是整数。
    • 20. 发明授权
    • Optical information recording method
    • 光信息记录方法
    • US5289453A
    • 1994-02-22
    • US937101
    • 1992-08-31
    • Eiji OhnoKenichi NishiuchiNoboru YamadaNobuo Akahira
    • Eiji OhnoKenichi NishiuchiNoboru YamadaNobuo Akahira
    • G11B7/0045G11B7/24G11B7/243G11B7/258G11B7/00
    • G11B7/00454G11B7/24G11B7/243G11B7/258
    • 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.
    • 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。