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    • 85. 发明授权
    • Optical information recording medium
    • 光信息记录介质
    • US5745475A
    • 1998-04-28
    • US884318
    • 1997-06-27
    • Eiji OhnoKenichi NishiuchiYoshitaka SakaueKazuhisa IdeNaoyasu MiyagawaNobuo Akahira
    • Eiji OhnoKenichi NishiuchiYoshitaka SakaueKazuhisa IdeNaoyasu MiyagawaNobuo Akahira
    • G11B7/24G11B7/007G11B7/013
    • G11B7/00718G11B7/24G11B7/24085
    • An optical information recording medium includes: a substrate including a groove having a concave shape and a land having a convex shape adjacent to the groove; and a recording layer on the substrate, wherein the recording layer consists of a material which changes between a first state and a second state whose optical property is different from that of the first state, a first portion of the optical information recording medium including a portion in the first state of the recording layer having a first reflectance, and a second portion of the optical information recording medium including a region in the second state of the recording layer having a second reflectance which is different from the first reflectance, whereby information is recorded onto the groove and the land, and wherein a ratio of the first reflectance to the second reflectance, a phase of reflected light from the first portion and a phase of reflected light from the second portion are set such that at least one of an amplitude and a carrier to noise ratio (CNR) of a signal obtained by reproducing information from the groove is approximately identical to that from the land.
    • 一种光学信息记录介质,包括:具有凹形槽的凹槽和与凹槽相邻的具有凸形的凹槽的基板; 以及基板上的记录层,其中所述记录层由在第一状态和第二状态之间变化的材料组成,所述材料的光学性质与所述第一状态不同,所述光学信息记录介质的第一部分包括部分 在具有第一反射率的记录层的第一状态下,并且光信息记录介质的第二部分包括具有与第一反射率不同的第二反射率的记录层的第二状态的区域,由此记录信息 并且其中所述第一反射率与所述第二反射率的比率,来自所述第一部分的反射光的相位和来自所述第二部分的反射光的相位被设置为使得至少一个振幅和 通过从槽重放信息而获得的信号的载波噪声比(CNR)与从陆地大致相同。
    • 87. 发明授权
    • Optical information recording medium and method for manufacturing same
    • 光学信息记录介质及其制造方法
    • US07782746B2
    • 2010-08-24
    • US11956127
    • 2007-12-13
    • Keiji NishikioriEiji OhnoShinya Abe
    • Keiji NishikioriEiji OhnoShinya Abe
    • G11B7/24
    • G11B7/24067G11B7/24053
    • An optical information recording medium that has a simple structure and with which warpage is kept to a minimum even under environmental changes over a wide range, and a method for manufacturing this medium are provided. The optical information recording medium is an optical information recording medium used for the reproduction of recorded information and for recording and reproduction, including a substrate having an information recording layer, and a light transmitting layer that covers the information recording layer and is composed of a radiation curable resin, wherein a warpage adjusting layer for adjusting warpage of the light transmitting layer caused by temperature changes is disposed on the opposite side of the substrate from the side on which the information recording layer is formed. There is included at least a temperature region that satisfies the relationship that the coefficient of linear expansion CL of the light transmitting layer
    • 提供具有简单结构并且即使在宽范围内的环境变化下翘曲也保持最小的光学信息记录介质,以及制造该介质的方法。 光信息记录介质是用于再现记录信息并用于记录和再现的光学信息记录介质,包括具有信息记录层的基板和覆盖信息记录层并由辐射组成的光透射层 固化树脂,其中用于调节由温度变化引起的透光层的翘曲的翘曲调节层设置在从形成信息记录层的一侧的基板的相对侧。 至少包含满足在室温下的透光层的线膨胀系数CL(翘曲调节层的线膨胀系数SL)的系数的关系的温度区域。
    • 88. 发明授权
    • Optical recording medium and process for producing the same
    • 光记录介质及其制造方法
    • US07539121B2
    • 2009-05-26
    • US10550069
    • 2004-04-01
    • Morio TomiyamaShinya AbeYuuko KawaguchiEiji Ohno
    • Morio TomiyamaShinya AbeYuuko KawaguchiEiji Ohno
    • G11B7/24
    • G11B7/24079G11B7/24038G11B7/24085
    • An optical recording medium is provided with: a first substrate having first pits on one face thereof; a first reflective layer that is formed on the face bearing the first pits of the first substrate in a manner so as to reflect lands and recesses of the first pits; a second substrate that is formed on the first reflective layer, with second pits being formed on a face on the side opposite to the first reflective layer; a second reflective layer that is formed on the face bearing the second pits of the second substrate in a manner so as to reflect lands and recesses of the second pits; and a cover layer formed on the second reflective layer. In this structure, the first pit depth d1 that is a difference between lands and recesses of the first reflective layer, the wavelength λ of signal-reproducing laser light and the refractive index n1 of the second substrate satisfy the following relational expressions: λ/(5n1)≦d1≦λ/(3n1) and d1≠λ/(4n1). Moreover, the second pit depth d2, which is a difference between lands and recesses of the second reflective layer, the wavelength λ of signal-reproducing laser light and the refractive index n2 of the cover layer satisfy the following relational expressions: λ/(5n2)≦d2≦λ/(3n2) and d2≠λ/(4n2).
    • 光记录介质设置有:第一基板,其一面上具有第一凹坑; 第一反射层,其形成在承载第一基板的第一凹坑的表面上,以便反映第一凹坑的凹槽和凹陷; 形成在第一反射层上的第二基板,第二凹坑形成在与第一反射层相对的一侧的表面上; 第二反射层,其形成在承载第二基板的第二凹坑的表面上,以便反射第二凹坑的凹陷和凹陷; 以及形成在所述第二反射层上的覆盖层。 在该结构中,作为第一反射层的区域和凹部之间的差的第一凹坑深度d1,信号再现激光的波长λ和第二基板的折射率n1满足以下关系式:λ/( 5n1)<= d1 <= lambda /(3n1)和d1 <> lambda /(4n1)。 此外,作为第二反射层的区域和凹部之间的差异的第二凹坑深度d2,信号再现激光的波长λ和覆盖层的折射率n2满足以下关系式:λ/(5n2 )<= d2 <= lambda /(3n2)和d2 <λλ/(4n2)。