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    • 8. 发明授权
    • Optical informaton recording medium
    • 光信息记录介质
    • US07981494B2
    • 2011-07-19
    • US12051627
    • 2008-03-19
    • Takuo KodairaIsao MatsudaTakeshi OtsuFumi Hara
    • Takuo KodairaIsao MatsudaTakeshi OtsuFumi Hara
    • B32B3/02
    • G11B7/246G11B7/2467G11B7/2472G11B7/2492G11B7/259Y10T428/21
    • In a write-once optical information recording medium including a substrate, a groove-shaped track such as a guiding groove, and an optical recording layer containing an organic dye material and disposed on the guiding groove, wherein information is recorded by irradiating a short-wavelength laser beam from a surface of the optical recording layer opposite the substrate, and the information can be reproduced by reading a change in the reflected light of a short-wavelength laser beam after the information recording, an unrecorded portion of the optical recording layer has a lower reflectance than a pit portion formed after recording to a portion of the optical recording layer, the optical recording layer has a refractive index n in the range of about 1.2 to about 2.1 before recording and an extinction coefficient k in the range of about 0.01 to about 0.7 before recording, and n+k is in the range of about 1.4 to about 2.1.
    • 在包括基板,诸如引导槽的凹槽形轨迹和包含有机染料材料并且设置在引导槽上的光学记录层的一次写入光信息记录介质中,其中通过照射短路来记录信息, 可以通过读取信息记录后的短波长激光束的反射光的变化来重现信息,光记录层的未记录部分具有 比在记录到光记录层的一部分之后形成的凹坑部分更低的反射率,光记录层在记录之前的折射率n在约1.2至约2.1的范围内,并且消光系数k在约0.01的范围内 在记录之前为约0.7,并且n + k在约1.4至约2.1的范围内。
    • 9. 发明申请
    • OPTICAL INFORMATON RECORDING MEDIUM
    • 光信息记录介质
    • US20080260984A1
    • 2008-10-23
    • US12051627
    • 2008-03-19
    • Takuo KodairaIsao MatsudaTakeshi OtsuFumi Hara
    • Takuo KodairaIsao MatsudaTakeshi OtsuFumi Hara
    • B32B3/02B32B37/00
    • G11B7/246G11B7/2467G11B7/2472G11B7/2492G11B7/259Y10T428/21
    • In a write-once optical information recording medium including a substrate, a groove-shaped track such as a guiding groove, and an optical recording layer containing an organic dye material and disposed on the guiding groove, wherein information is recorded by irradiating a short-wavelength laser beam from a surface of the optical recording layer opposite the substrate, and the information can be reproduced by reading a change in the reflected light of a short-wavelength laser beam after the information recording, an unrecorded portion of the optical recording layer has a lower reflectance than a pit portion formed after recording to a portion of the optical recording layer, the optical recording layer has a refractive index n in the range of about 1.2 to about 2.1 before recording and an extinction coefficient k in the range of about 0.01 to about 0.7 before recording, and n+k is in the range of about 1.4 to about 2.1.
    • 在包括基板,诸如引导槽的凹槽形轨迹和包含有机染料材料并且设置在引导槽上的光学记录层的一次写入光信息记录介质中,其中通过照射短路来记录信息, 可以通过读取信息记录后的短波长激光束的反射光的变化来重现信息,光记录层的未记录部分具有 比在记录到光记录层的一部分之后形成的凹坑部分更低的反射率,光记录层在记录之前的折射率n在约1.2至约2.1的范围内,并且消光系数k在约0.01的范围内 在记录之前为约0.7,并且n + k在约1.4至约2.1的范围内。
    • 10. 发明申请
    • OPTICAL INFORMATION RECORDING MEDIUM
    • 光信息记录介质
    • US20080198731A1
    • 2008-08-21
    • US12028723
    • 2008-02-08
    • Isao MatsudaFumi HaraTakeshi OtsuMotomitsu HagiwaraAkimasa Miyata
    • Isao MatsudaFumi HaraTakeshi OtsuMotomitsu HagiwaraAkimasa Miyata
    • G11B7/24
    • G11B7/24079G11B7/0053G11B7/00736
    • An optical information recording medium having a disk-shaped substrate formed with spiral grooves on one main surface, and having an optical reflection layer formed with grooves at the surface corresponding to the grooves of the substrate for reflecting a laser beam, an optical recording layer, a protective layer, and an optical transparency layer in this order on the main surface thereof. The optical information recording medium has a main information area and a sub-information area to the inner circumferential side thereof, in which the track pitch TrB of the grooves in the sub-information area is about 0.32 μm or less, and the depth D of the grooves and the half-band width W of the grooves satisfy a relation represented by: W≧2D+70, whereby the difference between the reflectivity at the land surface and the reflectivity at the groove surface in the sub-information area can be restricted to less than 30%, thereby preventing occurrence of mis-decipherment for BCA marks.
    • 一种光学信息记录介质,其具有在一个主表面上形成有螺旋槽的盘状基板,并且具有在与用于反射激光束的基板的凹槽对应的表面处形成有凹槽的光反射层,光学记录层, 保护层,透光性层等。 光信息记录介质具有其内周侧的主信息区域和子信息区域,其中子信息区域中的凹槽的轨道间距TrB为约0.32μm或更小,并且深度D为 沟槽和半带宽度W满足以下关系:W> = 2D + 70,由此在台面上的反射率与子信息区域中的槽表面的反射率之间的差可以是 限制在30%以下,从而防止BCA标记发生错误解密。