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11. 发明授权

US06661768B1 Optical disk, and method and apparatus for reproducing information recorded in optical disk 有权
标题翻译：光盘，以及用于再现记录在光盘中的信息的方法和装置
公开(公告)号：US06661768B1
公开(公告)日：2003-12-09
申请号：US09677595
申请日：2000-10-03
申请人： Takashi Yumiba , Teruyuki Takizawa , Mitsuro Moriya , Mitsuaki Oshima , Akihiko Nishioka , Koichi Morioka
发明人： Takashi Yumiba , Teruyuki Takizawa , Mitsuro Moriya , Mitsuaki Oshima , Akihiko Nishioka , Koichi Morioka
IPC分类号： G11B724
CPC分类号： G11B23/281 , G11B7/0037 , G11B7/005 , G11B7/007 , G11B7/013 , G11B7/24 , G11B20/00086 , G11B20/00586 , G11B20/00594
摘要： An optical disk is provided for recording data of a signal modulated according to a predetermined modulation method in a form of concavo-convex pits. The optical disk includes a first area having a reflecting film partly removed, and a second area for recording pits which are different from pits satisfying requirements of the predetermined modulation method. The first area having the reflecting film partly removed includes a portion which is formed by removing the reflecting film, and has a length longer than a maximum pit length determined by the modulation method in a circumferential direction of the optical disk. When the pits recorded on the optical disk are physically copied as they are, physical copying of the optical disk can be prevented by utilizing such a difference that the authorized optical disk differs from a pirated copy in a combination of the respective reproduced signals of the first and second areas.
摘要翻译：提供了一种光盘，用于记录根据预定调制方式调制的信号的数据，其形式为凹凸坑。光盘包括具有部分去除的反射膜的第一区域和用于记录不同于满足预定调制方式的要求的凹坑的凹坑的第二区域。具有部分去除反射膜的第一区域包括通过去除反射膜形成的部分，并且具有比在光盘的圆周方向上由调制方法确定的最大凹坑长度更长的长度。当记录在光盘上的凹坑被物理地复制时，可以通过利用这样的差异来防止光盘的物理复制：授权的光盘与盗版的不同之处在于，将第一和第二个地区。

12. 发明公开

US20240021214A1 OPTICAL DISC DEVICE AND RECORDING AND REPRODUCTION DEVICE 审中-公开
公开(公告)号：US20240021214A1
公开(公告)日：2024-01-18
申请号：US18030226
申请日：2021-10-06
申请人： Yuuichi KUZE , Masatoshi YAJIMA , Shinichi KONISHI , Akihiko NISHIOKA
发明人： Yuuichi KUZE , Masatoshi YAJIMA , Shinichi KONISHI , Akihiko NISHIOKA
IPC分类号： G11B7/0037 , G01N21/95 , G11B7/127
CPC分类号： G11B7/00375 , G01N21/9506 , G11B7/127 , G11B2007/0006
摘要： An optical disc device includes: an optical pickup including a first laser light source that emits laser light, an objective lens that focuses the laser light emitted from the first laser light source onto an optical disc, and a light receiving element that receives reflected light from the optical disc, and performs photoelectric conversion on the reflected light received to output a received-light signal; an FS signal generator that generates an FS signal indicating the light amount of the reflected light from the optical disc, based on the received-light signal from the light receiving element; and a dirt determiner that determines that dirt is present in the optical pickup, when the peak level of the FS signal is less than a dirt determination threshold, and controls the light receiving element to increase the peak level of the received-light signal from the light receiving element.

13. 发明授权

US07952966B2 Tracking apparatus for optical information reproduction apparatus 有权
标题翻译：光信息再生装置追踪装置
公开(公告)号：US07952966B2
公开(公告)日：2011-05-31
申请号：US12515179
申请日：2007-11-16
申请人： Masayoshi Nakamura , Akihiko Nishioka , Yasuo Nakata
发明人： Masayoshi Nakamura , Akihiko Nishioka , Yasuo Nakata
IPC分类号： G11B7/00
CPC分类号： G11B7/0906 , G11B7/0956
摘要： A tracking apparatus for an optical information reproduction apparatus includes the following: a photoelectric detector (1) in which a far-field pattern of a light spot converged on a recording medium is formed across a divided light-receiving cell; an arithmetic unit (2) for outputting at least a pair of arithmetic signals from the output of the photoelectric detector (1); a phase comparator (4) for detecting a phase difference between the output signals of the arithmetic unit (2); an absolute value detector (8) for detecting an absolute value of the output signal of the phase comparator (4); a level detector (9) for generating a signal that indicates whether or not a convergence position of the light spot is located off an information track by detecting a predetermined number of times or more the output signal of the absolute value detector (8) has become larger than a predetermined value; a sensitivity detector (10) for detecting and outputting the sensitivity of the level detector (9) by observing the output signal of the level detector (9); and a controller (11) for adjusting the detection conditions of the level detector (9) so that the output of the sensitivity detector (10) is a predetermined value.
摘要翻译：光信息再现装置的跟踪装置包括：光束检测器（1），其中在分割的光接收单元上形成会聚在记录介质上的光点的远场图案; 用于从光电检测器（1）的输出端输出至少一对算术信号的算术单元（2）; 相位比较器（4），用于检测运算单元（2）的输出信号之间的相位差; 绝对值检测器（8），用于检测相位比较器（4）的输出信号的绝对值; 电平检测器（9），用于通过检测绝对值检测器（8）的输出信号的预定次数或更多次来产生指示光点的会聚位置是否位于信息轨道之外的信号大于预定值; 灵敏度检测器（10），用于通过观察电平检测器（9）的输出信号来检测和输出电平检测器（9）的灵敏度; 以及用于调整电平检测器（9）的检测条件使得灵敏度检测器（10）的输出为预定值的控制器（11）。

14. 发明申请

US20100034062A1 TRACKING APPARATUS FOR OPTICAL INFORMATION REPRODUCTION APPARATUS 有权
标题翻译：用于光信息再现装置的跟踪装置
公开(公告)号：US20100034062A1
公开(公告)日：2010-02-11
申请号：US12515179
申请日：2007-11-16
申请人： Masayoshi Nakamura , Akihiko Nishioka , Yasuo Nakata
发明人： Masayoshi Nakamura , Akihiko Nishioka , Yasuo Nakata
IPC分类号： G11B7/00
CPC分类号： G11B7/0906 , G11B7/0956
摘要： A tracking apparatus for an optical information reproduction apparatus includes the following: a photoelectric detector (1) in which a far-field pattern of a light spot converged on a recording medium is formed across a divided light-receiving cell; an arithmetic unit (2) for outputting at least a pair of arithmetic signals from the output of the photoelectric detector (1); a phase comparator (4) for detecting a phase difference between the output signals of the arithmetic unit (2); an absolute value detector (8) for detecting an absolute value of the output signal of the phase comparator (4); a level detector (9) for generating a signal that indicates whether or not a convergence position of the light spot is located off an information track by detecting a predetermined number of times or more the output signal of the absolute value detector (8) has become larger than a predetermined value; a sensitivity detector (10) for detecting and outputting the sensitivity of the level detector (9) by observing the output signal of the level detector (9); and a controller (11) for adjusting the detection conditions of the level detector (9) so that the output of the sensitivity detector (10) is a predetermined value.
摘要翻译：光信息再现装置的跟踪装置包括：光束检测器（1），其中在分割的光接收单元上形成会聚在记录介质上的光点的远场图案; 用于从光电检测器（1）的输出端输出至少一对算术信号的算术单元（2）; 相位比较器（4），用于检测运算单元（2）的输出信号之间的相位差; 绝对值检测器（8），用于检测相位比较器（4）的输出信号的绝对值; 电平检测器（9），用于通过检测绝对值检测器（8）的输出信号的预定次数或更多次来产生指示光点的会聚位置是否位于信息轨道之外的信号大于预定值; 灵敏度检测器（10），用于通过观察电平检测器（9）的输出信号来检测和输出电平检测器（9）的灵敏度; 以及用于调整电平检测器（9）的检测条件使得灵敏度检测器（10）的输出为预定值的控制器（11）。

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