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    • 7. 发明授权
    • Erasable optical recording material for blue lasers
    • 用于蓝色激光的可擦除光学记录材料
    • US07022460B2
    • 2006-04-04
    • US09937999
    • 2001-09-27
    • Horst BernethThomas BieringerRainer HagenSerguei Kostromine
    • Horst BernethThomas BieringerRainer HagenSerguei Kostromine
    • G11B7/24
    • G11B7/245Y10S430/146Y10T428/12681
    • An optical recording material for binary, multibit or volume data storage is described. The optical recording material comprises: (a) at least one dyestuff selected from polymeric azo dyestuffs and oligomeric azo dyestuffs, the dyestuff changing its spatial arrangement upon irradiation with polarized electromagnetic radiation; and (b) optionally at least one grouping having form anisotropy. The optical recording material has the following characteristics: (i) the absorption maximum of the dyestuff(s) is at least 30 nm less than 400 nm and/or at least 30 nm greater than 400 nm; (ii) at 400 nm the dyestuff reaches an optical density of not more than 60% of its absorption maximum; (iii) the optical recording material has the capacity for being rewritten on by changing the state of polarization of actinic light, an intensity of at least 80% of the original value being achieved after a deletion/rewriting cycle; and (iv) at 400 nm, under identical conditions, an optical writing operation performed upon the optical recording material proceeds no more slowly than at 500 nm, and birefringence values induced during the optical writing operation do not differ from those birefringence values induced at 500 nm by more than 10%.
    • 描述了用于二进制,多位或卷数据存储的光学记录材料。 光学记录材料包括:(a)至少一种选自聚合偶氮染料和低聚偶氮染料的染料,染料在用极化电磁辐射照射时改变其空间布置; 和(b)任选的至少一个具有各向异性的组。 光记录材料具有以下特性:(i)染料的吸收最大值比400nm小至少30nm,和/或至少30nm大于400nm; (ii)在400nm处,染料达到不超过其吸收最大值的60%的光密度; (iii)光记录材料具有通过改变光化光的偏振状态来重写的能力,在删除/重写周期之后至少达到原始值的80%的强度; 和(iv)在相同条件下,在400nm处,对光学记录材料进行的光学写入操作不比在500nm处慢得多,并且在光学写入操作期间引起的双折射值与在500℃诱发的双折射值没有不同 nm超过10%。