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    • 26. 发明授权
    • Optical recording method
    • 光记录方式
    • US5486437A
    • 1996-01-23
    • US506456
    • 1995-07-24
    • Takashi IwamuraYoko MatsuzawaShin-Ichiro Tamura
    • Takashi IwamuraYoko MatsuzawaShin-Ichiro Tamura
    • G11B7/24G11B7/244G11B7/246G11B7/248G11B7/00
    • G11B7/248G11B7/24G11B7/246G11B7/2472G11B7/2531G11B7/2534G11B7/2535G11B7/2585Y10S430/146
    • An optical recording medium wherein a recording layer capable of optically recording and reproducing the information is formed on a substrate, and wherein the information is recorded with a light beam having a wavelength shorter than that of a replay light beam. A film thickness d of the recording layer is set so as to satisfy the relation d.ltoreq.1.75.lambda./n, where .lambda. is the wavelength of the replay light beam and n is the real part of the complex index of refraction of the recording layer with respect to the replay light beam. The real part of the complex index of refraction of the recording layer with respect to the replay light beam is not less than 2.55, while the absolute value of the imaginary part of the complex index of refraction of the recording layer with respect to the recording light beam is not less than 1.0. The organic dye may be enumerated by a cyanine compound and a porphyrin compound. If the porphyrin compound is used, blue-hued laser recording becomes possible. The optical recording medium is capable of non-destructive reading and superior in reliability and high-speed recording/reproducing characteristics.
    • 一种光学记录介质,其中能够光学地记录和再现信息的记录层形成在基板上,并且其中以具有比重放光束的波长短的波长的光束记录信息。 记录层的膜厚度d被设定为满足关系式d <=1.75λ/ n,其中λ是重放光束的波长,n是记录的复合折射率的实部 相对于重放光束的层。 记录层相对于重放光束的复合折射率的实部不小于2.55,而记录层的复折射率相对于记录光的虚部的绝对值 光束不小于1.0。 有机染料可以列举花青化合物和卟啉化合物。 如果使用卟啉化合物,则可以进行蓝色激光记录。 光学记录介质能够进行非破坏性读取,并且具有优异的可靠性和高速记录/再现特性。