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1. 发明授权

US06970404B2 Information recording/reproducing apparatus 有权
标题翻译：信息记录/重放装置
公开(公告)号：US06970404B2
公开(公告)日：2005-11-29
申请号：US09972701
申请日：2001-10-05
申请人： Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai , Tohru Nakamura
发明人： Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai , Tohru Nakamura
IPC分类号： G11B7/09 , G11B7/095 , G11B7/00
CPC分类号： G11B7/094 , G11B7/0901 , G11B7/0956
摘要： An information recording/reproducing apparatus includes a focusing optical system for focusing light from a light source on an information recording medium as a light spot and an error signal generation system for generating an error signal that represents the positional deviation between an information track and the light spot on the information recording medium from the light reflected by the information recording medium. The apparatus further includes a tilt measurement system for measuring the amount of relative inclination between the focusing optical system and the information recording medium and an offset application system for performing off-track of the light spot by applying an electric offset corresponding to the measured amount of inclination to the error signal. Since the electric offset that corresponds to the amount of inclination is added directly to the error signal, the apparatus does not require a complicated algorithm and can improve the recording and reproduction characteristics easily at low cost.
摘要翻译：一种信息记录/再现装置，包括用于将来自光源的光聚焦在作为光点的信息记录介质上的聚焦光学系统和用于产生表示信息光道与光线之间的位置偏差的误差信号的误差信号发生系统从信息记录介质反射的光线在信息记录介质上点光。该装置还包括倾斜测量系统，用于测量聚焦光学系统和信息记录介质之间的相对倾斜度，以及偏移应用系统，用于通过施加与所测量的测量量相对应的电偏移来执行光点的偏离轨迹倾斜于误差信号。由于对应于倾斜量的电偏移直接与误差信号相加，因此该装置不需要复杂的算法，并且可以以低成本容易地提高记录和再现特性。

2. 发明申请

US20090040909A1 Optical head device and optical information device 审中-公开
标题翻译：光头设备和光信息设备
公开(公告)号：US20090040909A1
公开(公告)日：2009-02-12
申请号：US11918780
申请日：2006-04-20
申请人： Joji Anzai , Hideki Aikoh , Akihiro Arai , Hideki Nakata , Fumitomo Yamasaki , Yoshiaki Komma
发明人： Joji Anzai , Hideki Aikoh , Akihiro Arai , Hideki Nakata , Fumitomo Yamasaki , Yoshiaki Komma
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G11B7/1356 , G11B2007/0006
摘要： An optical head device is provided with a light source 1 for emitting a plurality of lights having different wavelengths, an objective lens 31 for focusing a light spot on an optical disc 21, an objective lens 32 for focusing light spots on optical discs 22 to 24, and a prism 53 for splitting a laser light having a wavelength of 405 nm from the light source 1 into a transmitting light and a reflected light, introducing the reflected light to the objective lens 31 and the transmitting light to the objective lens 32, and introducing laser lights having wavelengths of 660 nm, 780 nm from the light source 1 to the objective lens 32.
摘要翻译：光头装置设置有用于发射具有不同波长的多个光的光源1，用于将光点聚焦在光盘21上的物镜31，用于将光点聚焦在光盘22至24上的物镜32 以及棱镜53，用于将来自光源1的具有405nm波长的激光分解成透射光和反射光，将反射光引导到物镜31和透射光到物镜32，以及将从光源1到物镜32的波长为660nm，780nm的激光引入。

3. 发明授权

US08493824B2 Optical head and optical disc device 有权
标题翻译：光头和光盘装置
公开(公告)号：US08493824B2
公开(公告)日：2013-07-23
申请号：US12089984
申请日：2006-10-10
申请人： Fumitomo Yamasaki , Akihiro Arai , Hideki Aikoh
发明人： Fumitomo Yamasaki , Akihiro Arai , Hideki Aikoh
IPC分类号： G11B7/00
CPC分类号： G11B7/0956 , G11B7/0943
摘要： A tilt can be detected highly accurately by minimizing the tilt detection error. An optical head includes: an objective lens for converging a light beam from a light source onto an optical disc; a photodetector section receiving the beam, reflected from the disc, at divided areas on its photodetection plane and outputting light detection signals from those areas; and a tilt detecting section for detecting a relative tilt between the lens and disc based on the detection signals. The tilt detecting section generates a first push-pull signal PP1 based on the detection signals supplied from a first group of areas, which are arranged symmetrically to a virtual reference line drawn parallel to a disc radial direction and crossing an optical axis, also generates a second push-pull signal PP2 based on the detection signals supplied from a second group of areas, different from the first group and also arranged symmetrically to the reference line, changes coefficients k according to the location of the lens in a disc radial direction, and generates a tilt detection signal TLT by TLT=PP1−k×PP2.
摘要翻译：通过最小化倾斜检测误差可以高精度地检测倾斜。光头包括：用于将来自光源的光束会聚到光盘上的物镜; 光接收器部分，在光检测平面上的分割区域处接收从光盘反射的光束，并从这些区域输出光检测信号; 以及倾斜检测部分，用于基于检测信号检测透镜和光盘之间的相对倾斜度。倾斜检测部基于从与盘径向平行且与光轴交叉的虚拟参考线对称地配置的第一组区域提供的检测信号，生成第一推挽信号PP1，也产生基于从与第一组不同的第二组区域提供的并且对称地布置到参考线的检测信号的第二推挽信号PP2根据透镜在盘径向的位置改变系数k，以及通过TLT = PP1-k×PP2生成倾斜检测信号TLT。

4. 发明授权

US07773468B2 Optical head and optical information recorder/reproducer 有权
标题翻译：光头和光信息记录器/再现器
公开(公告)号：US07773468B2
公开(公告)日：2010-08-10
申请号：US11570821
申请日：2006-04-11
申请人： Fumitomo Yamasaki , Eishin Mori , Hideki Aikoh , Akihiro Arai , Joji Anzai
发明人： Fumitomo Yamasaki , Eishin Mori , Hideki Aikoh , Akihiro Arai , Joji Anzai
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/1369 , G11B7/1376 , G11B2007/0013
摘要： Fifth order spherical aberration in addition to third order spherical aberration for an optical information recording medium of which thickness of a light transmission layer changes greatly is corrected. An objective lens collects a laser beam emitted from a semiconductor laser on an optical information recording medium. A spherical aberration correcting portion corrects spherical aberration generated according to a thickness of the light transmission layer of the optical information recording medium, in which the spherical aberration correcting portion includes a collimator lens, a lens holder and a stepping motor for correcting the third order spherical aberration and a liquid crystal element and an applied voltage control portion for correcting the fifth order spherical aberration.
摘要翻译：校正光传输层的厚度变化较大的光信息记录介质的三阶球面像差的第五级球面像差。物镜将从半导体激光器发射的激光束收集在光学信息记录介质上。球面像差校正部分校正根据光学信息记录介质的光透射层的厚度产生的球面像差，其中球面像差校正部分包括准直透镜，透镜保持器和用于校正三阶球面的步进电机像差和用于校正五阶球面像差的液晶元件和施加电压控制部分。

5. 发明申请

US20090046564A1 OPTICAL HEAD AND OPTICAL DISC DEVICE 有权
标题翻译：光头和光盘设备
公开(公告)号：US20090046564A1
公开(公告)日：2009-02-19
申请号：US12293291
申请日：2007-03-19
申请人： Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai
发明人： Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai
IPC分类号： G11B7/135
CPC分类号： G11B7/0956 , G11B7/1378 , G11B7/13927 , G11B2007/0006
摘要： In an optical head (10) used for an optical disc (30) in which light-transmitting layers largely change in thickness, a degree-of-diversion/convergence enlarging member (20) fixed between a collimating lens (4) and an objective lens (6) is arranged. With this configuration, a moving range of the collimating lens can be reduced, and the optical head can be miniaturized.
摘要翻译：在用于其中透光层厚度变化很大的光盘（30）的光学头（10）中，固定在准直透镜（4）和物镜（4）之间的分度/会聚放大部件（20）配置透镜（6）。利用这种配置，可以减小准直透镜的移动范围，并且可以使光学头小型化。

6. 发明申请

US20070268806A1 Optical Head and Optical Information Recorder/Reproducer 有权
标题翻译：光头和光信息记录器/复制器
公开(公告)号：US20070268806A1
公开(公告)日：2007-11-22
申请号：US11570821
申请日：2006-04-11
申请人： Fumitomo Yamasaki , Eishin Mori , Hideki Aikoh , Akihiro Arai , Joji Anzai
发明人： Fumitomo Yamasaki , Eishin Mori , Hideki Aikoh , Akihiro Arai , Joji Anzai
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/1369 , G11B7/1376 , G11B2007/0013
摘要： Fifth order spherical aberration in addition to third order spherical aberration for an optical information recording medium of which thickness of a light transmission layer changes greatly is corrected. An objective lens collects a laser beam emitted from a semiconductor laser on an optical information recording medium. A spherical aberration correcting portion corrects spherical aberration generated according to a thickness of the light transmission layer of the optical information recording medium, in which the spherical aberration correcting portion includes a collimator lens, a lens holder and a stepping motor for correcting the third order spherical aberration and a liquid crystal element and an applied voltage control portion for correcting the fifth order spherical aberration.
摘要翻译：校正光传输层的厚度变化较大的光信息记录介质的三阶球面像差的第五级球面像差。物镜将从半导体激光器发射的激光束收集在光学信息记录介质上。球面像差校正部分校正根据光学信息记录介质的光透射层的厚度产生的球面像差，其中球面像差校正部分包括准直透镜，透镜保持器和用于校正三阶球面的步进电机像差和用于校正五阶球面像差的液晶元件和施加电压控制部分。

7. 发明授权

US08325581B2 Optical head and optical disc device 有权
标题翻译：光头和光盘装置
公开(公告)号：US08325581B2
公开(公告)日：2012-12-04
申请号：US12293291
申请日：2007-03-19
申请人： Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai
发明人： Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai
IPC分类号： G11B7/00
CPC分类号： G11B7/0956 , G11B7/1378 , G11B7/13927 , G11B2007/0006
摘要： An optical head (10) transmits a light beam to an optical disc (30), in which light-transmitting layers largely change in thickness, and includes a degree-of-diversion/convergence enlarging member (20) fixed between a collimating lens (4) and an objective lens (6). The diversion/convergence enlarging member (20) reduces a moving range of the collimating lens (4), and allows the optical head (10) to be miniaturized.
摘要翻译：光头（10）将光束透射到光透射层的厚度大大变化的光盘（30），并且包括固定在准直透镜（20）之间的分度/会聚放大部件（20） 4）和物镜（6）。分流/会聚放大构件（20）减小准直透镜（4）的移动范围，并允许光学头（10）小型化。

8. 发明申请

US20090279399A1 OPTICAL HEAD AND OPTICAL DISC DEVICE 有权
标题翻译：光头和光盘设备
公开(公告)号：US20090279399A1
公开(公告)日：2009-11-12
申请号：US12089984
申请日：2006-10-10
申请人： Fumitomo Yamasaki , Akihiro Arai , Hideki Aikoh
发明人： Fumitomo Yamasaki , Akihiro Arai , Hideki Aikoh
IPC分类号： G11B20/00 , G11B7/00
CPC分类号： G11B7/0956 , G11B7/0943
摘要： A tilt can be detected highly accurately by minimizing the tilt detection error. An optical head includes: an objective lens for converging a light beam from a light source onto an optical disc; a photodetector section receiving the beam, reflected from the disc, at divided areas on its photodetection plane and outputting light detection signals from those areas; and a tilt detecting section for detecting a relative tilt between the lens and disc based on the detection signals. The tilt detecting section generates a first push-pull signal PP1 based on the detection signals supplied from a first group of areas, which are arranged symmetrically to a virtual reference line drawn parallel to a disc radial direction and crossing an optical axis, also generates a second push-pull signal PP2 based on the detection signals supplied from a second group of areas, different from the first group and also arranged symmetrically to the reference line, changes coefficients k according to the location of the lens in a disc radial direction, and generates a tilt detection signal TLT by TLT=PP1-k×PP2.
摘要翻译：通过最小化倾斜检测误差可以高精度地检测倾斜。光头包括：用于将来自光源的光束会聚到光盘上的物镜; 光接收器部分，在光检测平面上的分割区域处接收从光盘反射的光束，并从这些区域输出光检测信号; 以及倾斜检测部分，用于基于检测信号检测透镜和光盘之间的相对倾斜度。倾斜检测部基于从与盘径向平行且与光轴交叉的虚拟参考线对称地配置的第一组区域提供的检测信号，生成第一推挽信号PP1，基于从与第一组不同的第二组区域提供的并且对称地布置到参考线的检测信号的第二推挽信号PP2根据透镜在盘径向的位置改变系数k，以及通过TLT = PP1-k×PP2产生倾斜检测信号TLT。

9. 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.

10. 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.

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