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    • 5. 发明授权
    • Optical information storage medium reproduction apparatus and control method of the same
    • 光信息存储介质再现装置及其控制方法
    • US08422345B2
    • 2013-04-16
    • US12814168
    • 2010-06-11
    • Masaki YamamotoHirohisa YamadaYasuhiro HaradaGo MoriHideharu TajimaShigemi MaedaYoshiteru Murakami
    • Masaki YamamotoHirohisa YamadaYasuhiro HaradaGo MoriHideharu TajimaShigemi MaedaYoshiteru Murakami
    • G11B7/00G11B7/24
    • G11B7/00G11B7/0037G11B7/005G11B7/08511G11B7/12G11B7/126G11B7/1263G11B7/24G11B7/24038G11B19/125G11B19/128G11B2007/0013
    • In an optical information storage medium reproduction apparatus (10) for reproducing an optical information storage medium including a plurality of information recording layers each including a recording mark having a length shorter than an optical system resolution limit, reproduction laser power for reading an information recording layer closest to a reproduction-laser-incident surface of the optical information storage medium is set to be lower than reproduction laser power for reading an information recording layer farthest from the reproduction-laser-incident surface but not lower than minimum reproduction laser power that satisfies a reproduction signal characteristic that the optical information storage medium reproduction apparatus (10) requires. With the arrangement, it is possible to prevent that the information recording layer closest to the reproduction-laser-incident surface is irradiated wrongly with reproduction laser having high reproduction laser power, thereby making it possible to obtain successful reproduction quality. That is, it is possible to realize the optical information storage medium reproduction apparatus (10) that can set optimum reproduction laser power and perform stable super resolution reproduction.
    • 在用于再现包括多个信息记录层的光信息存储介质的光学信息存储介质再现设备(10)中,每个信息记录层包括长度短于光学系统分辨率极限的记录标记,用于读取信息记录层的再现激光功率 最靠近光学信息存储介质的再现激光入射表面被设置为低于用于读取距再生激光入射面最远的信息记录层的再生激光功率,但不低于满足 光信息存储介质再生装置(10)要求的再现信号特性。 通过这种布置,可以防止最接近再现激光入射表面的信息记录层与具有高再现激光功率的再现激光器错误地照射,从而可以获得成功的再现质量。 也就是说,可以实现能够设置最佳再现激光功率并且执行稳定的超分辨率再现的光学信息存储介质再现装置(10)。
    • 10. 发明授权
    • Optical information recording medium reproducing device
    • 光信息记录介质再现装置
    • US08094544B2
    • 2012-01-10
    • US12734190
    • 2008-10-17
    • Hirohisa YamadaMasaki YamamotoYasuhiro HaradaGo MoriHideharu Tajima
    • Hirohisa YamadaMasaki YamamotoYasuhiro HaradaGo MoriHideharu Tajima
    • G11B7/24
    • G11B7/005G11B7/1267G11B7/2533
    • An optical information recording medium reproducing device (1) reproduces information from a super-resolution optical information recording medium (100a) having the information stored therein by positioning, according to a random pattern system, a plurality of recording marks including a recording mark shorter than a resolution limit of an optical system. This reproducing device (1) performs test readings for measuring indexes each relating to a reproduction quality of the super-resolution optical information recording medium (100a) by emitting laser light onto a storage surface of the super-resolution optical information recording medium (100a), while changing a reproduction laser power from a predetermined initial value, and based on the indexes measured, sets a reproduction laser power for reproducing the information. Thus, since the reproduction laser power for reproducing the information stored in the super-resolution optical information recording medium (100a) is determined based on the test readings results, a favorable reproduction quality can be obtained.
    • 光信息记录介质再现装置(1)通过根据随机图案系统定位多个记录标记,该记录标记包括比记录标记短的记录标记,从具有存储在其中的信息的超分辨率光学信息记录介质(100a)再现信息 光学系统的分辨率限制。 该再现装置(1)通过将激光发射到超分辨率光学信息记录介质(100a)的存储表面上来执行用于测量与超分辨率光学信息记录介质(100a)的再现质量有关的指标的测试读数, 在从预定的初始值改变再现激光功率的同时,并且基于测量的指标,设置用于再现信息的再现激光功率。 因此,由于基于测试读数结果确定用于再现存储在超分辨率光学信息记录介质(100a)中的信息的再现激光功率,因此可以获得良好的再现质量。