公开(公告)号：US20090135687A1

公开(公告)日：2009-05-28

申请号：US12279061

申请日：2007-02-13

申请人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

发明人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as not to include light spots formed by luminous fluxes of reflected light from the optical information recording medium layers other than the optical information recording medium layer targeted for recording or playback.

摘要翻译： 光头包括从光盘的反射光的光束提取不包括光束的光轴的至少第一光束分支​​的全息图; 以及光接收器，其接收来自光盘的反射光并产生信号输出，其中光电检测器具有光接收区域，其接收来自用于记录或回放的光信息记录介质层的反射光的第一光束分支 光盘的多个光信息记录介质层，光接收区域被放置成使得由来自光信息记录介质层的反射光的由第一光束分支​​形成的光斑产生的信号输出 在第一和第二光检测区域之间进行记录或重放的目标是相同的，并且光接收区域的边界线位于不包括由来自光信息的反射光的光束形成的光点 记录介质层以外的光信息记录介质层 录音或播放。

公开(公告)号：US08068403B2

公开(公告)日：2011-11-29

申请号：US12090144

申请日：2006-10-13

申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/133 ,  G11B7/0908 ,  G11B7/1381 ,  G11B2007/0013

摘要： To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc.The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference. The calculator calculates the difference between sum of a first group of signals supplied from a first group of areas and that of a second group of signals supplied from a second group of areas, thereby generating a focus error signal.

摘要翻译： 通过减少由多层光盘的非读取层反射的光的干扰的影响来提供光学头来产生良好的伺服和读取信号。 头部包括：第一光学系统，用于将来自光源的光聚焦在第一或第二存储层上; 第二光学系统，用于当所述光会聚在所述第一层上时，接收和发射从所述第一层反射的光和从所述第二层反射的杂散光; 光检测器; 和一个计算器。 光电检测器的光敏区域输出表示通过第二系统入射到那里的光的强度的信号。 入射在第二系统上的反射和杂散光彼此干涉，并且第一和第二组区域被布置成等同地受到由干涉引起的强度变化的影响。 计算器计算从第一组区域提供的第一组信号和从第二组区域提供的第二组信号的第一组信号的和之间的差，从而产生聚焦误差信号。

公开(公告)号：US07869331B2

公开(公告)日：2011-01-11

申请号：US12279061

申请日：2007-02-13

申请人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

发明人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B7/135

CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as not to include light spots formed by luminous fluxes of reflected light from the optical information recording medium layers other than the optical information recording medium layer targeted for recording or playback.

摘要翻译： 光头包括从光盘的反射光的光束提取不包括光束的光轴的至少第一光束分支​​的全息图; 以及光接收器，其接收来自光盘的反射光并产生信号输出，其中光电检测器具有光接收区域，其接收来自用于记录或回放的光信息记录介质层的反射光的第一光束分支 光盘的多个光信息记录介质层，光接收区域被放置成使得由来自光信息记录介质层的反射光的由第一光束分支​​形成的光斑产生的信号输出 在第一和第二光电检测区域之间进行记录或重放的目标实际上相同，并且光接收区域的边界线位于不包括由来自光信息的反射光的光通量形成的光点的位置 记录介质层以外的光信息记录介质层 录音或播放。

公开(公告)号：US20090257340A1

公开(公告)日：2009-10-15

申请号：US12090144

申请日：2006-10-13

申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/133 ,  G11B7/0908 ,  G11B7/1381 ,  G11B2007/0013

摘要： To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc.The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference. The calculator calculates the difference between sum of a first group of signals supplied from a first group of areas and that of a second group of signals supplied from a second group of areas, thereby generating a focus error signal.

摘要翻译： 通过减少由多层光盘的非读取层反射的光的干扰的影响来提供光学头来产生良好的伺服和读取信号。 头部包括：第一光学系统，用于将来自光源的光聚焦在第一或第二存储层上; 第二光学系统，用于当所述光会聚在所述第一层上时，接收和发射从所述第一层反射的光和从所述第二层反射的杂散光; 光检测器; 和一个计算器。 光电检测器的光敏区域输出表示通过第二系统入射到那里的光的强度的信号。 入射在第二系统上的反射和杂散光彼此干涉，并且第一和第二组区域被布置成等同地受到由干涉引起的强度变化的影响。 计算器计算从第一组区域提供的第一组信号和从第二组区域提供的第二组信号的第一组信号的和之间的差，从而产生聚焦误差信号。

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。

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。

公开(公告)号：US07965612B2

公开(公告)日：2011-06-21

申请号：US12641734

申请日：2009-12-18

申请人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

发明人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B7/20

CPC分类号： G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.

摘要翻译： 即使将其用于包含多个信息记录层的光学信息记录介质，也被抑制得越来越大。 在该光学头中，准直透镜由设置在光源侧的凹透镜和设置在物镜侧的凸透镜形成。 准直透镜致动器沿着光传输层的厚度直到光信息记录介质的信息记录层产生的球面像差被消除的方向移动凸透镜。 在准直透镜相对于物镜的一侧设置孔径光阑，孔径光阑位于物镜侧的凸透镜的焦点附近。

公开(公告)号：US20100091636A1

公开(公告)日：2010-04-15

申请号：US12641734

申请日：2009-12-18

申请人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

发明人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.

摘要翻译： 即使将其用于包含多个信息记录层的光学信息记录介质，也被抑制得越来越大。 在该光学头中，准直透镜由设置在光源侧的凹透镜和设置在物镜侧的凸透镜形成。 准直透镜致动器沿着光传输层的厚度直到光信息记录介质的信息记录层产生的球面像差被消除的方向移动凸透镜。 在准直透镜相对于物镜的一侧设置孔径光阑，孔径光阑位于物镜侧的凸透镜的焦点附近。

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。

公开(公告)号：US07656775B2

公开(公告)日：2010-02-02

申请号：US11272822

申请日：2005-11-15

申请人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

发明人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B7/20

CPC分类号： G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.

摘要翻译： 即使将其用于包含多个信息记录层的光学信息记录介质，也被抑制得越来越大。 在该光学头中，准直透镜由设置在光源侧的凹透镜和设置在物镜侧的凸透镜形成。 准直透镜致动器沿着光传输层的厚度直到光信息记录介质的信息记录层产生的球面像差被消除的方向移动凸透镜。 在准直透镜相对于物镜的一侧设置孔径光阑，孔径光阑位于物镜侧的凸透镜的焦点附近。