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发明授权
CN105206288B 光信息记录介质再生装置 有权

光信息记录介质再生装置
摘要：
本发明提供一种光信息记录介质再生装置。光信息记录介质(1)的第一信息记录层(20)、第二信息记录层(40)包括构成标记(32、52)以及间隔(33、53)的预制坑群(31、51)、以及超分辨率膜(23、43)，标记(32、52)以及间隔(33、53)具有不同的长度，标记(32、52)以及间隔(33、53)中长度最小的最小标记与长度最小的最小间隔的平均长度在用于再生第一信息记录层(20)、第二信息记录层(40)中记录的信息的再生光学系统的分辨率极限以下，预制坑群(31、51)形成为再生光学系统再生预制坑群(31、51)时的推挽信号的极性为负极性。据此，提供价廉、并且使用大记录容量的超分辨率再生技术的多层光信息记录介质。
摘要（英）：

An optical information recording medium has a first information recording layer (20) and a second information recording layer (40) each of which includes (i) a group of pre-pits (31, 51) constituting marks (32, 52) and spaces (33, 53) and (ii) a super-resolution film (23, 43), the marks (32, 52) and the spaces (33, 53) having different lengths, an average length of a smallest mark that is smallest in length and a smallest space that is smallest in length being less than or equal to a resolution limit of a reproduction optical system for reproducing information recorded on the first information recording layer (20) and the second information recording layer (40), the group of pre-pits (31, 51) being formed so that a push-pull signal for the reproduction optical system to reproduce the information recorded by the group of pre-pits is negative in polarity. This provides an inexpensive and high-capacity multilayer optical information recording medium based on a super-resolution technology.

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