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1. 发明授权

US08094543B2 Information recording medium, reproducing apparatus and reproducing method 有权
标题翻译：信息记录介质，再现装置和再现方法
公开(公告)号：US08094543B2
公开(公告)日：2012-01-10
申请号：US12634042
申请日：2009-12-09
申请人： Masahito Nakao , Yasumori Hino , Yoshiaki Komma , Fumitomo Yamasaki , Kousei Sano
发明人： Masahito Nakao , Yasumori Hino , Yoshiaki Komma , Fumitomo Yamasaki , Kousei Sano
IPC分类号： G11B7/00
CPC分类号： G11B7/1267 , G11B7/005 , G11B7/24038 , G11B7/26
摘要： An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an information recording layer L(n) is identified by Pw(n), and if the readout power of the laser beam in reading information from an information recording layer L(n+a) is identified by Pw(n+a), then a base thickness between the information recording layers is determined so that the intensity of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n) becomes equal to or lower than that of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n+a).
摘要翻译：根据本发明的信息记录介质包括至少三个信息记录层。如果从信息记录层L（n）读取信息中的激光束的读出功率被Pw（n）识别，并且如果从信息记录层L（n + a）读取信息中的激光束的读出功率）由Pw（n + a）识别，则信息记录层之间的基底厚度被确定为当信息记录层L（n + a）被激光束照射时具有读出功率的光的强度当信息记录层L（n + a）被具有读出功率Pw（n + a）的激光束照射时，Pw（n）变得等于或低于光的光。

2. 发明授权

US08144563B2 Information recording medium, reproducing device and reproducing method 有权
标题翻译：信息记录介质，再现装置和再现方法
公开(公告)号：US08144563B2
公开(公告)日：2012-03-27
申请号：US12936939
申请日：2009-12-03
申请人： Masahito Nakao , Yasumori Hino , Yoshiaki Komma , Fumitomo Yamasaki , Kousei Sano
发明人： Masahito Nakao , Yasumori Hino , Yoshiaki Komma , Fumitomo Yamasaki , Kousei Sano
IPC分类号： G11B7/00 , G11B7/24
CPC分类号： G11B7/005 , G11B7/00736 , G11B7/1267 , G11B7/24038 , G11B2007/0013
摘要： An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an information recording layer L(n) is identified by Pw(n), and if the readout power of the laser beam in reading information from an information recording layer L(n+a) is identified by Pw(n+a), then a base thickness between the information recording layers is determined so that the intensity of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n) becomes equal to or lower than that of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n+a).
摘要翻译：根据本发明的信息记录介质包括至少三个信息记录层。如果从信息记录层L（n）读取信息中的激光束的读出功率被Pw（n）识别，并且如果从信息记录层L（n + a）读取信息中的激光束的读出功率）由Pw（n + a）识别，则信息记录层之间的基底厚度被确定为当信息记录层L（n + a）被激光束照射时具有读出功率的光的强度当信息记录层L（n + a）被具有读出功率Pw（n + a）的激光束照射时，Pw（n）变得等于或低于光的光。

3. 发明申请

US20110032805A1 INFORMATION RECORDING MEDIUM, REPRODUCING DEVICE AND REPRODUCING METHOD 有权
标题翻译：信息记录介质，再现设备和再现方法
公开(公告)号：US20110032805A1
公开(公告)日：2011-02-10
申请号：US12936939
申请日：2009-12-03
申请人： Masahito Nakao , Yasumori Hino , Yoshiaki Komma , Fumitomo Yamasaki , Kousei Sano
发明人： Masahito Nakao , Yasumori Hino , Yoshiaki Komma , Fumitomo Yamasaki , Kousei Sano
IPC分类号： G11B7/26 , G11B7/12
CPC分类号： G11B7/005 , G11B7/00736 , G11B7/1267 , G11B7/24038 , G11B2007/0013
摘要： An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an information recording layer L(n) is identified by Pw(n), and if the readout power of the laser beam in reading information from an information recording layer L(n+a) is identified by Pw(n+a), then a base thickness between the information recording layers is determined so that the intensity of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n) becomes equal to or lower than that of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n+a).
摘要翻译：根据本发明的信息记录介质包括至少三个信息记录层。如果从信息记录层L（n）读取信息中的激光束的读出功率被Pw（n）识别，并且如果从信息记录层L（n + a）读取信息中的激光束的读出功率）由Pw（n + a）识别，则信息记录层之间的基底厚度被确定为当信息记录层L（n + a）被激光束照射时具有读出功率的光的强度当信息记录层L（n + a）被具有读出功率Pw（n + a）的激光束照射时，Pw（n）变得等于或低于光的光。

4. 发明授权

US08391120B2 Optical head, optical disc device and information processing device 有权
标题翻译：光头，光盘装置及信息处理装置
公开(公告)号：US08391120B2
公开(公告)日：2013-03-05
申请号：US12604758
申请日：2009-10-23
申请人： Fumitomo Yamasaki , Kousei Sano , Tomoaki Tojo , Katsuhiko Hayashi , Yoshiaki Komma
发明人： Fumitomo Yamasaki , Kousei Sano , Tomoaki Tojo , Katsuhiko Hayashi , Yoshiaki Komma
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G11B7/1374 , G11B7/13922 , G11B7/13925 , G11B2007/0006 , G11B2007/0013
摘要： An optical head, an optical disc device and an information processing device are capable of suppressing the amount of third-order astigmatism created upon recording or reproducing information on or from a multi-layer optical disc including at least three information recording surfaces. An objective lens satisfies a relationship of tc>(t0+tn)/2 assuming that t0 denotes the thickness of a light transmitting layer from the outer surface of the multi-layer optical disc to an information recording surface having the largest light transmitting layer thickness, tn denotes the thickness of a light transmitting layer from the outer surface of the multi-layer optical disc to an information recording surface having the smallest light transmitting layer thickness and tc denotes the thickness of a virtual light transmitting layer at which the absolute value of a third-order spherical aberration is minimum when blue-violet laser light is incident as parallel light on the objective lens.
摘要翻译：光头，光盘装置和信息处理装置能够抑制在包括至少三个信息记录表面的多层光盘上记录或再现信息时产生的三阶散光量。假设t0表示从多层光盘的外表面到具有最大透光层厚度的信息记录表面的透光层的厚度，物镜满足tc>（t0 + tn）/ 2的关系，tn表示从多层光盘的外表面到具有最小透光层厚度的信息记录表面的透光层的厚度，tc表示虚拟透光层的厚度，其中绝对值当蓝紫色激光作为平行光入射到物镜上时，三阶球面像差最小。

5. 发明授权

US07742384B2 Optical head and optical disc device 有权
标题翻译：光头和光盘装置
公开(公告)号：US07742384B2
公开(公告)日：2010-06-22
申请号：US11924225
申请日：2007-10-25
申请人： Fumitomo Yamasaki , Kousei Sano , Yoshiaki Komma , Kanji Wakabayashi , Toshiyasu Tanaka
发明人： Fumitomo Yamasaki , Kousei Sano , Yoshiaki Komma , Kanji Wakabayashi , Toshiyasu Tanaka
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/0903 , G11B7/0906 , G11B7/0909 , G11B7/131 , G11B7/1353 , G11B2007/0006
摘要： The present invention aims to provide an optical head and an optical disk device capable of suitably detecting tracking error signals for different types of optical discs.A polarizing hologram element includes a first area and a second area adjacent to the first area in an area where a beam reflected and diffracted by a BD passes. The first area includes a first transmission area for transmitting many 1st-order diffracted lights from the BD, a second transmission area adjacent to the first transmission area and closer to an optical axis than the first transmission area, and a third transmission area adjacent to the first and second transmission areas. The second area includes a fourth transmission area for transmitting many 1st-order diffracted lights from the BD, a fifth transmission area adjacent to the fourth transmission area and closer to the optical axis than the fourth transmission area, and a sixth transmission area adjacent to the fourth and fifth transmission areas.
摘要翻译：本发明的目的在于提供一种能够适当地检测不同类型的光盘的跟踪误差信号的光头和光盘装置。偏振全息元件包括在BD反射和衍射的光束通过的区域中与第一区域相邻的第一区域和第二区域。第一区域包括用于从BD发送许多1级衍射光的第一透射区域，与第一透射区域相邻并且比第一透射区域更靠近光轴的第二透射区域和与第一透射区域相邻的第三透射区域第一和第二传输区域。第二区域包括用于从BD传输许多1级衍射光的第四传输区域，与第四传输区域相邻并且比第四传输区域更靠近光轴的第五传输区域，以及与第四传输区域相邻的第六传输区域第四和第五传输区域。

6. 发明申请

US20080084798A1 Optical pick-up head, optical information apparatus, and optical information reproducing method 有权
公开(公告)号：US20080084798A1
公开(公告)日：2008-04-10
申请号：US11981366
申请日：2007-10-31
申请人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
发明人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0903 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

7. 发明申请

US20070195664A1 Optical pick-up head, optical information apparatus, and optical information reproducing method 有权
公开(公告)号：US20070195664A1
公开(公告)日：2007-08-23
申请号：US11789106
申请日：2007-04-23
申请人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
发明人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0903 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

8. 发明授权

US07558162B2 Optical pick-up head, optical information apparatus, and optical information reproducing method 有权
公开(公告)号：US07558162B2
公开(公告)日：2009-07-07
申请号：US11981487
申请日：2007-10-31
申请人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
发明人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0903 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

9. 发明申请

US20080259750A1 Optical pick-up head, optical information apparatus, and optical information reproducing method 有权
公开(公告)号：US20080259750A1
公开(公告)日：2008-10-23
申请号：US11981236
申请日：2007-10-31
申请人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
发明人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0903 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

10. 发明申请

US20080084797A1 Optical head device and optical information device 有权
标题翻译：光头设备和光信息设备
公开(公告)号：US20080084797A1
公开(公告)日：2008-04-10
申请号：US11905923
申请日：2007-10-05
申请人： Kousei Sano , Takayuki Nagata , Hideki Aikoh , Joji Anzai , Fumitomo Yamasaki
发明人： Kousei Sano , Takayuki Nagata , Hideki Aikoh , Joji Anzai , Fumitomo Yamasaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： The present invention aims to generate an offset-free tracking signal and to realize a stable tracking control even if an optical disc is a multi-layer disc having three or more layers.Light receiving portions of a main region light receiving portion group is arranged between a projection line of a third dividing line on a photodetector and a projection line of a fourth dividing line on the photodetector by stray lights from information layers adjacent to the one, on which a light beam is focused, out of a plurality of information layers. Further, light receiving portions of a subregion light receiving portion group is arranged between a projection line of a first dividing line on a photodetector and a projection line of a second dividing line on the photodetector by the stray lights from the information layers adjacent to the one, on which a light beam is focused, out of the plurality of information layers.
摘要翻译：本发明的目标是产生无偏移跟踪信号，并且即使光盘是具有三层或更多层的多层盘也能实现稳定的跟踪控制。主区域光接收部分组的光接收部分布置在光电检测器上的第三分割线的投影线和光电检测器上的第四分割线的投影线之间，与来自与其相邻的信息层的杂散光在多个信息层中聚焦光束。此外，子区域光接收部分组的光接收部分被布置在光电检测器上的第一分割线的投影线和光电检测器上的第二分割线的投影线之间，在多个信息层中聚焦光束。

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