公开(公告)号：EP3054448A4

公开(公告)日：2016-11-02

申请号：EP14849659

申请日：2014-04-08

申请人： SHARP KK ,  MEMORY TECH HOLDINGS INC

发明人： YAMADA HIROHISA ,  NAKA TAKAYUKI ,  YAMAMOTO MASAKI ,  ADACHI YOSHIHISA ,  TAJIMA HIDEHARU ,  KONISHI MASAHITO

IPC分类号： G11B7/007 ,  G11B7/005 ,  G11B7/24085 ,  G11B7/24097 ,  G11B20/12 ,  G11B27/00

CPC分类号： G11B7/0079 ,  G11B7/00736 ,  G11B7/013 ,  G11B7/24085 ,  G11B20/1217 ,  G11B27/3027

公开(公告)号：EP3023986A4

公开(公告)日：2016-08-03

申请号：EP14825639

申请日：2014-04-08

申请人： SHARP KK ,  MEMORY TECH HOLDINGS INC

发明人： TAJIMA HIDEHARU ,  YAMAMOTO MASAKI ,  YAMADA HIROHISA ,  NAKA TAKAYUKI ,  KONISHI MASAHITO

IPC分类号： G11B7/126 ,  G11B7/005 ,  G11B7/1392

CPC分类号： G11B20/10314 ,  G11B7/0052 ,  G11B7/0053 ,  G11B7/013 ,  G11B7/13 ,  G11B7/1374 ,  G11B7/13927 ,  G11B2007/0133

摘要： A reproducing device (100) includes (i) an optical pickup (6) for irradiating, with reproduction light, an optical disk (1) which is a super-resolution medium, (ii) an RF signal processing circuit (9) for converting, into a reproduction signal, light which reflected off optical disk (1), (iii) an i-MLSE detecting section (141) for evaluating quality of the reproduction signal, and (iv) a spherical aberration correcting section (142) for correcting a spherical aberration by using a result of evaluation of the quality of the reproduction signal.

公开(公告)号：EP3007172A4

公开(公告)日：2016-06-29

申请号：EP14808270

申请日：2014-04-08

申请人： SHARP KK ,  MEMORY TECH HOLDINGS INC

发明人： NAKA TAKAYUKI ,  YAMADA HIROHISA ,  YAMAMOTO MASAKI ,  TAJIMA HIDEHARU ,  KONISHI MASAHITO

IPC分类号： G11B7/007 ,  G11B7/24

CPC分类号： G11B7/007 ,  G11B7/005 ,  G11B7/0052 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/1372 ,  G11B7/24 ,  G11B7/24065 ,  G11B7/24079 ,  G11B7/24085 ,  G11B7/243 ,  G11B2007/0133

摘要： In a case where (i) a reflectance calculated from a reflected light amount obtained from a longest pit (P1max) or a longest space (S1max) in a first pit row is defined as a first reflectance and (ii) a reflectance calculated from a reflected light amount obtained from a longest pit (P2max) or a longest space (S2max) in the second pit row is defined as a second reflectance, the first pit row is formed such that the first reflectance becomes substantially identical with the second reflectance.

公开(公告)号：EP2175447A4

公开(公告)日：2011-01-19

申请号：EP08764924

申请日：2008-05-30

申请人： SHARP KK

发明人： MORI GO ,  YAMADA HIROHISA ,  YAMAMOTO MASAKI ,  HARADA YASUHIRO ,  TAJIMA HIDEHARU ,  MAEDA SHIGEMI ,  MURAKAMI YOSHITERU

IPC分类号： G11B7/004 ,  G11B7/005 ,  G11B7/007 ,  G11B7/125 ,  G11B7/24 ,  G11B7/243 ,  G11B7/258 ,  G11B20/14

CPC分类号： G11B20/18 ,  G11B7/00736 ,  G11B7/24065 ,  G11B7/252 ,  G11B7/258 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/1012 ,  G11B20/10481 ,  G11B20/1217 ,  G11B20/1426 ,  G11B2220/2541 ,  G11B2220/2579

摘要： This invention allows super-resolution reproduction with which a better bER value is attainable, when information is recorded by a random pattern including a mark length not longer than a resolution limit, by use of a highly versatile signal decoding method. Information is recorded as marks and spaces coded by RLL(1,7) modulation, which each of the marks and spaces have one of a plurality of lengths, and 2T marks and 2T spaces of the marks and spaces being formed are shorter than 0.12 µm. An information recording layer (20) includes a reproduction film (21) and a reflective film (22) which are provided in this order from a side from which reproducing light is incident, which reproduction film is made of (i) zinc oxide, (ii) strontium titanate, (iii) titanium oxide, (iv)cerium oxide, or (v) a material including at least one of the (i) through (iv), and which reflective film is made of tantalum or titanium.