公开(公告)号：USRE38538E1

公开(公告)日：2004-06-22

申请号：US10202648

申请日：2002-07-25

申请人： Akio Yamakawa ,  Kamon Uemura

发明人： Akio Yamakawa ,  Kamon Uemura

IPC分类号： G11B700

CPC分类号： G11B7/133 ,  G11B7/0037 ,  G11B7/0909 ,  G11B7/131 ,  G11B7/1381 ,  G11B2007/0006

摘要： A laser diode applies a laser beam through a grating, a beam splitter, and an objective to a compact disc. A laser beam reflected by the compact disc is applied through the objective and the beam splitter to a photodiode. The objective has a large numerical aperture of 0.6 in order to be able of play back a digital video disc that has a thin substrate and contains information recorded at a high density. To prevent the photodiode from suffering aberrations caused due to the large numerical aperture of the objective, the photodiode has a relatively small photodetector unit having a normalized detector size ranging from 3 &mgr;m to 16 &mgr;m, for detecting only returning light up to a numerical aperture of 0.3 and not detecting light of greater numerical aperture values.

公开(公告)号：US06222803B1

公开(公告)日：2001-04-24

申请号：US08661459

申请日：1996-06-11

申请人： Kamon Uemura ,  Kiyoshi Ohsato ,  Akio Yamakawa ,  Masamichi Utsumi

发明人： Kamon Uemura ,  Kiyoshi Ohsato ,  Akio Yamakawa ,  Masamichi Utsumi

IPC分类号： G11B7095

CPC分类号： G11B19/128 ,  G11B7/0901 ,  G11B7/1372 ,  G11B7/1381 ,  G11B7/139 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup including a light source for radiating a light beam, a diffraction element for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens for converging the light beams separated by the diffraction element on a signal recording surface of the optical recording medium, a light receiving unit having a four-segment first light receiving portion for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions arranged on both sides of the first light receiving portion for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit for generating a first tracking signal based on respective outputs of the first light receiving portion and for generating a second tracking signal based on outputs of the second and third light receiving portions.

摘要翻译： 一种包括用于照射光束的光源的光学拾取器，用于将从光源辐射的光束分成至少三个光束，即主光束和两个侧光束的衍射元件，用于会聚分离的光束的物镜 通过光记录介质的信号记录表面上的衍射元件，具有用于接收由光记录介质的记录表面反射的主光束的四段第一光接收部分和第二和第三光接收部分的光接收单元 布置在第一光接收部分的两侧，用于接收由光记录介质的记录表面反射的侧光束;以及计算单元，用于基于第一光接收部分的各个输出产生第一跟踪信号， 基于第二和第三光接收部分的输出的第二跟踪信号。

公开(公告)号：US06366543B2

公开(公告)日：2002-04-02

申请号：US09819794

申请日：2001-03-29

申请人： Kamon Uemura ,  Kiyoshi Ohsato ,  Akio Yamakawa ,  Masamichi Utsumi

发明人： Kamon Uemura ,  Kiyoshi Ohsato ,  Akio Yamakawa ,  Masamichi Utsumi

IPC分类号： G11B7095

CPC分类号： G11B19/128 ,  G11B7/0901 ,  G11B7/1372 ,  G11B7/1381 ,  G11B7/139 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup including a light source for radiating a light beam, a diffraction element for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens for converging the light beams separated by the diffraction element on a signal recording surface of the optical recording medium, a light receiving unit having a four-segment first light receiving portion for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions arranged on both sides of the first light receiving portion for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit for generating a first tracking signal based on respective outputs of the first light receiving portion and for generating a second tracking signal based on outputs of the second and third light receiving portions.

摘要翻译： 一种包括用于照射光束的光源的光学拾取器，用于将从光源辐射的光束分成至少三个光束，即主光束和两个侧光束的衍射元件，用于会聚分离的光束的物镜 通过光记录介质的信号记录表面上的衍射元件，具有用于接收由光记录介质的记录表面反射的主光束的四段第一光接收部分和第二和第三光接收部分的光接收单元 布置在第一光接收部分的两侧，用于接收由光记录介质的记录表面反射的侧光束;以及计算单元，用于基于第一光接收部分的各个输出产生第一跟踪信号， 基于第二和第三光接收部分的输出的第二跟踪信号。

公开(公告)号：US5875164A

公开(公告)日：1999-02-23

申请号：US743826

申请日：1996-11-05

申请人： Akio Yamakawa ,  Kamon Uemura

发明人： Akio Yamakawa ,  Kamon Uemura

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/013 ,  G11B7/13 ,  G11B7/135 ,  G11B27/36

CPC分类号： G11B7/133 ,  G11B7/131 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B7/0037 ,  G11B7/0909

摘要： A laser diode applies a laser beam through a grating, a beam splitter, and an objective to a compact disc. A laser beam reflected by the compact disc is applied through the objective and the beam splitter to a photodiode. The objective has a large numerical aperture of 0.6 in order to be able of play back a digital video disc that has a thin substrate and contains information recorded at a high density. To prevent the photodiode from suffering aberrations caused due to the large numerical aperture of the objective, the photodiode has a relatively small photodetector unit having a normalized detector size ranging from 3 .mu.m to 16 .mu.m, for detecting only returning light up to a numerical aperture of 0.3 and not detecting light of greater numerical aperture values.

摘要翻译： 激光二极管将激光束通过光栅，分束器和物镜施加到光盘。 由光盘反射的激光束通过物镜和分束器施加到光电二极管。 该目的具有0.6的大数值孔径，以便能够播放具有薄衬底并且包含以高密度记录的信息的数字视频盘。 为了防止光电二极管遭受由于物镜的大数值孔径引起的像差，光电二极管具有相对较小的光电检测器单元，其具有范围从3μm至16μm的归一化检测器尺寸，用于仅检测返回光直到数值 孔径为0.3，不检测更大数值孔径值的光。

公开(公告)号：US5737294A

公开(公告)日：1998-04-07

申请号：US607449

申请日：1996-02-27

申请人： Akio Yamakawa ,  Kamon Uemura

发明人： Akio Yamakawa ,  Kamon Uemura

IPC分类号： G02B13/00 ,  G02B3/04 ,  G11B7/00 ,  G11B7/005 ,  G11B7/135 ,  G02B3/00

CPC分类号： G02B3/04 ,  G11B7/1374 ,  G11B2007/0006

摘要： An objective lens having at least two regions of different numerical apertures is configured for focusing a light beam through the regions of the different numerical apertures on two different signal recording surfaces of at least two optical discs having light transmitting layers of different thicknesses. Since the objective lens is integrally formed by at least two lens portions, a light beam outgoing from a common light source is focused on signal recording surfaces of at least two optical discs having the light transmitting layers of different thicknesses.

摘要翻译： 具有不同数值孔径的至少两个区域的物镜被配置用于将光束聚焦在具有不同厚度的透光层的至少两个光盘的两个不同信号记录表面上的不同数值孔径的区域。 由于物镜由至少两个透镜部分整体形成，所以从公共光源出射的光束聚焦在具有不同厚度的透光层的至少两个光盘的信号记录表面上。

公开(公告)号：US08391112B2

公开(公告)日：2013-03-05

申请号：US12244365

申请日：2008-10-02

申请人： Yasushi Tomita ,  Takamichi Yamakoshi ,  Kamon Uemura

发明人： Yasushi Tomita ,  Takamichi Yamakoshi ,  Kamon Uemura

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/094 ,  G11B7/0945 ,  G11B7/13925 ,  G11B2007/0013

摘要： An optical disk apparatus driving an optical disk includes a tilt-angle adjusting unit configured to adjust a tilt angle indicating the tilt of an optical axis of laser light emitted from a pickup to detect an optimal tilt angle at which a traverse signal has the maximum amplitude and a storing unit configured to store information about the optimal tilt angle. When the optical disk has multiple recording layers on one side, the tilt-angle adjusting unit adjusts the tilt angle with respect to each of the multiple recording layers to detect the optimal tilt angle and the storing unit stores information about the optimal tilt angle with respect to each of the multiple recording layers. The tilt angle with respect to each of the multiple recording layers is controlled in accordance with the information about the optimal tilt angle with respect to each of the multiple recording layers.

摘要翻译： 驱动光盘的光盘装置具有：倾斜角度调整部，被配置为调整表示从拾取器发出的激光的光轴倾斜的倾斜角，以检测横动信号具有最大幅度的最佳倾斜角 以及存储单元，被配置为存储关于最佳倾斜角度的信息。 当光盘在一侧具有多个记录层时，倾斜角度调整单元相对于每个多个记录层调整倾斜角度以检测最佳倾斜角度，并且存储单元将关于最佳倾斜角的信息相对于 到多个记录层中的每一个。 根据关于多个记录层中的每一个的最佳倾斜角的信息来控制相对于每个多个记录层的倾斜角度。

公开(公告)号：US5442615A

公开(公告)日：1995-08-15

申请号：US90115

申请日：1993-08-26

申请人： Kiyoshi Ohsato ,  Naoya Eguchi ,  Kamon Uemura

发明人： Kiyoshi Ohsato ,  Naoya Eguchi ,  Kamon Uemura

IPC分类号： G11B7/095 ,  G11B7/135 ,  G11B7/09

CPC分类号： G11B7/1365 ,  G11B7/0956

摘要： A disc reproducing apparatus such ah as video disc players and compact disc players, etc., surely corrects skew of an optical disc and reproduces recorded information even though the recording density is high. The disc reproducing apparatus has a plate-like transparent member interposed in a focused light path of the light beam so as to tilt the transparent member and cancel any comatic aberration. A light spot correction means having the transparent parallel flat plate and at least a coil and a magnet changing the inclination of the flat plate is arranged in a light path of a light beam, thus comatic aberration due to skew of the optical disc is surely and simply corrected.

摘要翻译： PCT No.PCT / JP92 / 01516 Sec。 371日期：1993年8月26日 102（e）日期1993年8月26日PCT提交1992年11月20日PCT公布。 出版物WO93 / 10528 日期：1993年5月27日。像视盘播放器和光盘播放器等的盘再现装置肯定地校正光盘的偏斜，并且即使记录密度高，也可以再现记录的信息。 盘重放装置具有插入光束的聚焦光路中的板状透明构件，以使透明构件倾斜并消除任何彗形像差。 具有透明平行平板的光斑校正装置和至少一个线圈，并且改变平板的倾斜度的磁体被布置在光束的光路中，因此光盘的偏斜可以确定地和 简单地纠正。

公开(公告)号：US20120002518A1

公开(公告)日：2012-01-05

申请号：US13109087

申请日：2011-05-17

申请人： Seiichi SAGARA ,  Kamon Uemura ,  Takeshi Yonezawa

发明人： Seiichi SAGARA ,  Kamon Uemura ,  Takeshi Yonezawa

IPC分类号： G11B7/00

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

摘要： There is provided a playback device including an adjustment portion that, based on a first data recording surface among a plurality of data recording surfaces of an optical recording medium, adjusts tilt with respect to the first data recording surface, an adjustment amount measurement portion that measures a first tilt adjustment amount from a result of the tilt adjustment, an acquisition portion that acquires a coma aberration of the playback device, and a calculation portion that, based on the first tilt adjustment amount and the coma aberration, calculates a second tilt adjustment amount to adjust tilt with respect to a second data recording surface that is different to the first data recording surface.

摘要翻译： 提供了一种重放装置，包括：调整部，其基于光记录介质的多个数据记录面中的第一数据记录面调整相对于第一数据记录面的倾斜;调整量测量部， 从倾斜调整的结果得到的第一倾斜调节量，获取重放装置的彗形像差的获取部分，以及基于第一倾斜调整量和彗形像差的计算部分，计算第二倾斜调节量 调整相对于与第一数据记录表面不同的第二数据记录表面的倾斜度。

公开(公告)号：US20090109811A1

公开(公告)日：2009-04-30

申请号：US12244365

申请日：2008-10-02

申请人： Yasushi Tomita ,  Takamichi Yamakoshi ,  Kamon Uemura

发明人： Yasushi Tomita ,  Takamichi Yamakoshi ,  Kamon Uemura

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/094 ,  G11B7/0945 ,  G11B7/13925 ,  G11B2007/0013

摘要： An optical disk apparatus driving an optical disk includes a tilt-angle adjusting unit configured to adjust a tilt angle indicating the tilt of an optical axis of laser light emitted from a pickup to detect an optimal tilt angle at which a traverse signal has the maximum amplitude and a storing unit configured to store information about the optimal tilt angle. When the optical disk has multiple recording layers on one side, the tilt-angle adjusting unit adjusts the tilt angle with respect to each of the multiple recording layers to detect the optimal tilt angle and the storing unit stores information about the optimal tilt angle with respect to each of the multiple recording layers. The tilt angle with respect to each of the multiple recording layers is controlled in accordance with the information about the optimal tilt angle with respect to each of the multiple recording layers.

摘要翻译： 驱动光盘的光盘装置具有：倾斜角度调整部，被配置为调整表示从拾取器发出的激光的光轴倾斜的倾斜角，以检测横动信号具有最大幅度的最佳倾斜角 以及存储单元，被配置为存储关于最佳倾斜角度的信息。 当光盘在一侧具有多个记录层时，倾斜角度调整单元相对于每个多个记录层调整倾斜角度以检测最佳倾斜角度，并且存储单元将关于最佳倾斜角的信息相对于 到多个记录层中的每一个。 根据关于多个记录层中的每一个的最佳倾斜角的信息来控制相对于每个多个记录层的倾斜角度。