公开(公告)号：US20090040894A1

公开(公告)日：2009-02-12

申请号：US12237863

申请日：2008-09-25

申请人： Fumitomo Yamasaki ,  Tohru Nakamura

发明人： Fumitomo Yamasaki ,  Tohru Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/08511 ,  G11B7/0909 ,  G11B7/1378 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical data processing apparatus reads and/or writes data from/on a data storage medium, in which first and second data storage layer are stacked. The apparatus includes: a light detector including at least one photodetector for generating a light quantity signal; a detecting optical system for guiding reflected light beams from a storage layer; and a signal processor for generating a layer sensing signal from the light quantity signal and determining, by the layer sensing signal, the type of data storage medium. The light detector includes a layer sensing photodetector arranged in view of an of an area of the light detector, and further includes a photodetector which is different from the layer sensing photodetector which receives the reflected light beam to generate a focus signal.

摘要翻译： 光数据处理装置从堆叠第一和第二数据存储层的数据存储介质读取数据或从其写入数据。 该装置包括：光检测器，包括用于产生光量信号的至少一个光电检测器; 用于引导来自存储层的反射光束的检测光学系统; 以及信号处理器，用于从光量信号产生层感测信号，并且通过层感测信号确定数据存储介质的类型。 光检测器包括从光检测器的区域设置的层感测光电检测器，并且还包括与接收反射光束以产生聚焦信号的层感测光电检测器不同的光电检测器。

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.

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。

公开(公告)号：US20070189130A1

公开(公告)日：2007-08-16

申请号：US10592641

申请日：2005-08-24

申请人： Joji Anzai ,  Shin-ichi Kadowaki ,  Fumitomo Yamasaki ,  Eishin Mori

发明人： Joji Anzai ,  Shin-ichi Kadowaki ,  Fumitomo Yamasaki ,  Eishin Mori

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

摘要： Stable tracking control is achieved for an optical recording medium having a plurality of information recording planes. To achieve this, an optical information device comprises a light source for emitting a light beam, a focusing unit for converging the light beam emitted from the light source onto a predetermined information recording plane of an optical recording medium having a plurality of information recording planes, a beam splitting unit for splitting the light beam reflected by the optical recording medium, and a light detection unit having a light receiver that receives the light beam split by the beam splitting unit, for outputting a signal corresponding to the light intensity of the light beams received by the light receiver. A guide groove is formed on at least one of the information recording planes, and the light receiver is entirely disposed within in a map formed on the light detection unit by the light beam reflected by an information recording plane other than the predetermined information recording plane.

摘要翻译： 对于具有多个信息记录平面的光记录介质，实现了稳定的跟踪控制。 为了实现这一点，光信息装置包括用于发射光束的光源，用于将从光源发射的光束会聚到具有多个信息记录面的光记录介质的预定信息记录面上的聚焦单元， 用于分离由光记录介质反射的光束的光束分离单元和具有接收由分束单元分离的光束的光接收器的光检测单元，用于输出对应于光束的光强度的信号 由光接收器接收。 引导槽形成在至少一个信息记录面上，并且光接收器被除了预定信息记录面之外的信息记录面所反射的光束完全设置在形成在光检测单元上的映射中。

公开(公告)号：US08467282B2

公开(公告)日：2013-06-18

申请号：US12681820

申请日：2009-08-03

申请人： Fumitomo Yamasaki ,  Eishin Mori

发明人： Fumitomo Yamasaki ,  Eishin Mori

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/13927 ,  G11B2007/0013

摘要： An object of the invention is to provide an optical disc device, an optical head, and an information processing device that enable to advantageously record or reproduce information with respect to an information recording medium having three or more information recording surfaces with light transmissive layers of different thicknesses from each other. Assuming that an aberration amount of third-order coma aberration resulting from tilting a multilayer optical disc (60) by a unit angle is CMD0 (unit: mλ/deg), an aberration amount of third-order coma aberration resulting from tilting an objective lens (8) by a unit angle is CML0 (unit: mλ/deg), a tilt angle of the multilayer optical disc (60) is θ, a coefficient is k0, and a tilt angle of the objective lens (8) by an objective lens actuator (9) is α0 in converging laser light on an information recording surface having a largest light transmissive layer thickness out of the information recording surfaces of the multilayer optical disc (60), the objective lens actuator (9) tilts the objective lens (8) in such a manner that the tilt angle α0 of the objective lens (8) satisfies the following mathematical expression: α0=θ×k0×CMD0/CML0, where 0.5

摘要翻译： 本发明的目的是提供一种光盘装置，光学头和信息处理装置，其能够相对于具有三个或更多个具有不同透光层的信息记录表面的信息记录介质有利地记录或再现信息 彼此厚度。 假设由多层光盘（60）以单位角度倾斜而产生的三次彗形像差的像差量为CMD0（单位：mlλ/ deg），则由倾斜物镜产生的三阶彗形像差的像差量 （8）以单位角度为CML0（单位：mlambda / deg），多层光盘（60）的倾斜角为θ，系数为k0，物镜（8）的倾斜角度为目标 透镜致动器（9）在会聚激光中的α0是在多层光盘（60）的信息记录表面之外具有最大透光层厚度的信息记录表面上，物镜致动器（9）使物镜 8），使得物镜（8）的倾斜角α0满足以下数学表达式：α0=θ×k0×CMD0 / CML0，其中0.5

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。

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：US07558170B2

公开(公告)日：2009-07-07

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.

摘要翻译： 本发明的光信息装置包括：光拾取头，包括：光源; 衍射单位; 冷凝单元; 分束器; 光检测器; 和跟踪误差信号发生器。 光记录介质具有基本上以恒定间距布置的轨道。 平均音高是tp。 当主光束被放置在轨道上时，第一子光束和第二子光束被放置在轨道之间。 跟踪误差信号发生器对从接收主波束的光接收部分输出的信号执行差分运算，产生第一推挽信号，对从光接收部分输出的信号执行差分运算 接收第一子光束和第二子光束以产生第二推挽信号，并且相对于第一推挽信号和第二推挽信号执行差分算术运算以产生跟踪误差信号， 当在与光记录介质的轨道正交的方向上扫描光束时，以间距tp获得的第一推挽信号的幅度波动的情况。

公开(公告)号：US07542382B2

公开(公告)日：2009-06-02

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.