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1. 发明授权

US08121010B2 Hologram device, tilt detection method, and tilt correction method 失效
标题翻译：全息装置，倾斜检测方法和倾斜校正方法
公开(公告)号：US08121010B2
公开(公告)日：2012-02-21
申请号：US12731306
申请日：2010-03-25
申请人： Akio Yamakawa , Yoshiki Okamoto , Kenji Tanaka , Kazutatsu Tokuyama , Koji Takasaki
发明人： Akio Yamakawa , Yoshiki Okamoto , Kenji Tanaka , Kazutatsu Tokuyama , Koji Takasaki
IPC分类号： G11B7/00
CPC分类号： G11B7/0956 , G11B7/0065 , G11B7/083
摘要： A hologram device includes: a light source for applying light to a hologram recording medium having a recording layer in which information recording is performed by interference fringes between signal light and reference light; a spatial modulation unit that generates the signal light and/or the reference light and generates a marker light in a predetermined position within an incident surface of the light from the light source by performing spatial light modulation on the light from the light source; a light applying unit that applies the light subjected to spatial light modulation by the spatial light modulation unit to the hologram recording medium via an objective lens; a light receiving unit that receives the light applied via the objective lens through the hologram recording medium; and a tilt detection unit that obtains a tilt error signal representing an error from an ideal angle of a tilt angle as an incident angle of the applied light via the objective lens to an information recording surface of the hologram recording medium based on a result of detection of an error between an ideal light reception position of the marker light in the light receiving unit and a real light reception position of the marker light by the light receiving unit.
摘要翻译：全息装置包括：光源，用于向具有记录层的全息记录介质施加光，其中通过信号光与参考光之间的干涉条纹执行信息记录; 空间调制单元，通过对来自光源的光进行空间光调制，生成信号光和/或参考光，并通过对来自光源的光的入射表面中的预定位置产生标记光; 照射单元，经由物镜将经空间光调制单元经空间光调制的光施加到全息图记录介质上; 光接收单元，其接收通过所述全息图记录介质经由所述物镜施加的光; 以及倾斜检测单元，其基于检测结果，从倾斜角的理想角度获得表示误差的倾斜误差信号作为经由物镜的所施加的光的入射角到全息图记录介质的信息记录表面在光接收单元中的标记光的理想光接收位置与由光接收单元的标记光的实际光接收位置之间的误差。

2. 发明申请

US20100172002A1 OPTICAL PICKUP APPARATUS, REPRODUCTION APPARATUS, AND REPRODUCTION METHOD 失效
标题翻译：光学拾取装置，复制装置和再现方法
公开(公告)号：US20100172002A1
公开(公告)日：2010-07-08
申请号：US12651715
申请日：2010-01-04
申请人： Akio Yamakawa , Kenji Tanaka
发明人： Akio Yamakawa , Kenji Tanaka
IPC分类号： G03H1/12 , G03H1/22
CPC分类号： G11B7/0065 , G11B7/13 , G11B7/1381
摘要： An optical pickup apparatus includes: a light source to irradiate light onto a hologram recording medium onto which information is recorded by interference fringes of signal light and reference light; a spatial light modulation portion to generate the reference light by performing a spatial light modulation on the light from the light source; and an optical system to irradiate the reference light onto the hologram recording medium via a relay lens system and an objective lens and guide reproduction light obtained from the hologram recording medium in accordance with the irradiation of the reference light to an image pickup device via the objective lens and the relay lens system, the optical system being provided with, in an optical path between the relay lens system and the image pickup device, an angle permselective device that selectively transmits light with an incidence angle of a predetermined angle or less.
摘要翻译：光学拾取装置包括：光源，用于将信号光和参考光的干涉条纹记录在其上记录信息的全息图记录介质上; 空间光调制部分，通过对来自光源的光进行空间光调制来产生参考光; 以及光学系统，用于经由中继透镜系统和物镜将参考光照射到全息图记录介质上，并且根据通过该目的将图像拾取装置的参考光照射从全息图记录介质获得的引导再现光透镜和中继透镜系统，光学系统在中继透镜系统和图像拾取装置之间的光路中设置有选择性地透射具有预定角度或更小的入射角的光的角度选择选择装置。

3. 发明授权

US06366543B2 Optical pickup for discriminating between and reading different types of optical discs 失效
标题翻译：用于识别和读取不同类型的光盘的光学拾取器
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。

4. 发明授权

US6104688A Objective lens, reproducing apparatus and reproducing method 失效
标题翻译：物镜，再现装置和再现方法
公开(公告)号：US6104688A
公开(公告)日：2000-08-15
申请号：US19600
申请日：1998-02-06
申请人： Nobuyasu Kikuchi , Akio Yamakawa
发明人： Nobuyasu Kikuchi , Akio Yamakawa
IPC分类号： G11B7/09 , G11B7/00 , G11B7/135 , G11B7/20
CPC分类号： G11B7/1374 , G11B2007/0006
摘要： An objective lens, a reproducing apparatus and a reproducing method using a single objective lens for a DVD which can also read a CD without adding any peripheral member can be obtained. In an objective lens which is arranged so that a light beam emitted form a common light source (11) may be focused through a common objective lens (8) on respective signal recorded surfaces (1a), (2a) of a DVD (2) and a CD (1) having light transmitting layers (1c), (2c) of different thicknesses, an area of the objective lens (8) for the DVD (2) in a range of a numerical aperture NA from 0 to 0.3-0.4 from the light axis is worked to form correcting lens surface 8a for correcting the aberration caused when reading the CD (1) through the objective lens for the DVD (2), thereby allowing the CD to be read through the objective lens for the DVD.
摘要翻译：可以获得使用单个物镜的DVD的物镜，再现装置和再现方法，其也可以在不添加任何周边构件的情况下读取CD。在被配置为使得从公共光源（11）发射的光束可以通过DVD（2）的相应信号记录表面（1a），（2a）上的公共物镜（8）聚焦的物镜中，以及具有不同厚度的透光层（1c），（2c）的CD（1），用于DVD（2）的物镜（8）的面积在0至0.3-0.4的数值孔径NA的范围内从光轴被加工以形成用于校正通过用于DVD（2）的物镜读取CD（1）时引起的像差的校正透镜表面8a，从而允许通过用于DVD的物镜读取CD。

5. 发明授权

US5875164A Apparatus and method for recording and reproducing information from a plurality of recording medium having different thickness and recording densities 失效
标题翻译：用于从具有不同厚度和记录密度的多个记录介质记录和再现信息的设备和方法
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。

6. 发明授权

US5751679A Hologram formed on an objective lens for one defracting light beams which are separated by more than one track width 失效
$Hologram formed on an objective lens for one defracting light beams which are separated by more than one track width$
标题翻译：在物镜上形成的全息图用于由多于一个轨道宽度分开的一个折射光束
公开(公告)号：US5751679A
公开(公告)日：1998-05-12
申请号：US694262
申请日：1996-08-08
申请人： Akio Yamakawa , Masamichi Utsumi
发明人： Akio Yamakawa , Masamichi Utsumi
IPC分类号： G11B7/135 , G11B7/12
CPC分类号： G11B7/1374 , G11B7/1353
摘要： An optical pickup and a reproducing apparatus includes an objective lens having a hologram lens formed over the entire area of one surface thereof. A central portion of the hologram lens and peripheral portions of the hologram lens are formed differently, so that a laser beam diffracted by the central portion of the hologram lens is focused at plane A, and a laser beam diffracted by the peripheral portion is directed outward. As a result of this, the light intensity distribution after light has passed through the objective lens becomes substantially uniform, so that almost no primary ring is produced, thus preventing cross talk caused by reflected light from an adjacent track.
摘要翻译：光学拾取器和重放装置包括在其一个表面的整个区域上形成有全息透镜的物镜。全息透镜的中心部分和全息透镜的外围部分的形状不同，使得由全息透镜的中心部分衍射的激光束聚焦在平面A处，并且由周边部分衍射的激光束向外指向。结果，光通过物镜之后的光强分布变得基本均匀，使得几乎不产生主环，从而防止由相邻轨道的反射光引起的串扰。

7. 发明授权

US5682372A Method and apparatus for playing back multilayer disk 失效
标题翻译：播放多层磁盘的方法和装置
公开(公告)号：US5682372A
公开(公告)日：1997-10-28
申请号：US698309
申请日：1996-08-15
申请人： Akio Yamakawa , Tetsuo Usui , Masamichi Utsumi
发明人： Akio Yamakawa , Tetsuo Usui , Masamichi Utsumi
IPC分类号： G11B7/00 , G11B7/085 , G11B7/09
CPC分类号： G11B7/08511 , G11B7/0945 , G11B2007/0013 , G11B7/0908
摘要： There is disclosed a method of playing back information from an optical multilayer disk having a plurality of recording disks stacked on top of each other, by the use of an optical pickup device. In order to switch the focused recording layer from a first one to a second one so that data is read from the second recording layer, the focus balanced condition of the pickup device is switched from a setting providing a focus error characteristic adapted for the first recording layer to a reference setting providing a neutral focus error characteristic. Then, the focal point of the pickup device is moved from the first recording layer. Subsequently, the pickup device is focused onto the second recording layer, and data is read from the second recording layer. Thereafter, the focus balanced condition of the pickup device is switched to a setting adapted to the second recording layer.
摘要翻译：公开了一种通过使用光学拾取装置从具有堆叠在彼此顶部的多个记录盘的光学多层盘回放信息的方法。为了将聚焦记录层从第一记录层切换到第二记录层，从而从第二记录层读取数据，从提供适合于第一记录的聚焦误差特征的设置切换拾取装置的聚焦平衡状态层到提供中立聚焦误差特性的参考设置。然后，拾取装置的焦点从第一记录层移动。随后，拾取装置被聚焦到第二记录层上，并从第二记录层读取数据。此后，拾取装置的聚焦平衡状态切换到适合于第二记录层的设置。

8. 发明授权

US4896309A Optical disc player with phase shift dependent on disk rotation direction 失效
标题翻译：具有相移的光盘播放机取决于磁盘旋转方向
公开(公告)号：US4896309A
公开(公告)日：1990-01-23
申请号：US201197
申请日：1988-06-02
申请人： Akio Yamakawa , Noriyuki Yamashita , Masaaki Arai
发明人： Akio Yamakawa , Noriyuki Yamashita , Masaaki Arai
IPC分类号： H04N5/85 , G11B7/00 , G11B7/005 , G11B7/13 , G11B7/135
CPC分类号： G11B7/13
摘要： A signal reproducing system for use in an optical disc player comprises a photodetector including at least first and second photodetecting elements which are so disposed that a beam spot is formed on the first and second photodetecting elements by a light beam caused to impinge upon and reflected at an optical record disc and are aligned along a direction of movement of a diffraction pattern appearing in the beam spot in accordance with a record track on the optical record disc, a phase shifter for varying at least a phase of one of first and second output signals obtained respectively based on detection outputs of the first and second photodetecting elements, a switch for causing the first and second output signals selectively to pass through the phase shifter in response to a direction of movement of the record track in relation to the light beam incident upon the optical record disc, and a mixer operative to add one of the first and second output signals derived from the phase shifter to the other of the first and second output signals so as to produce a reproduced information signal.
摘要翻译：用于光盘播放器的信号再现系统包括一个光电检测器，该光电检测器至少包括第一和第二光电检测元件，该第一和第二光电检测元件被设置成通过一束光线形成在第一和第二光电检测元件上的光斑，光学记录盘，并且根据光记录盘上的记录轨道沿出现在光斑中的衍射图案的移动方向排列;移相器，用于改变第一和第二输出信号之一的至少相位分别基于第一和第二光电检测元件的检测输出而获得的开关，用于响应于记录轨道相对于入射到的光束的移动方向而选择性地使第一和第二输出信号通过移相器的开关光学记录盘和混合器，其可操作以添加从相移导出的第一和第二输出信号中的一个呃到第一和第二输出信号中的另一个，以便产生再现的信息信号。

9. 发明授权

US5506830A Disk player 失效
标题翻译：磁盘播放器
公开(公告)号：US5506830A
公开(公告)日：1996-04-09
申请号：US106129
申请日：1993-08-12
申请人： Seiichiroh Ohishi , Akio Yamakawa , Takashi Seki , Tetsuhiro Shiomi
发明人： Seiichiroh Ohishi , Akio Yamakawa , Takashi Seki , Tetsuhiro Shiomi
IPC分类号： G11B7/085 , G11B17/04 , G11B21/02 , G11B17/30
CPC分类号： G11B17/056 , G11B7/08594
摘要： A disk player has a guide member for guiding an optical pickup carrier along both sides of a double-sided disk. In order to prevent interference between the pickup carrier and the periphery of the disk during turning movement of the pickup carrier around the periphery of the disk from one of the upper and lower sides of the disk to the other side, the guide member is shaped like a horseshoe. The guide member includes upper and lower straight sections for guiding the pickup carrier, respectively, along the upper and lower sides of the disc, and an arched section extending vertically around the periphery of the disk and connecting the outer ends of the upper and lower straight sections. The upper and lower straight sections are not parallel to each other, but rather they are inclined in such a fanlike manner that the outer ends are wider apart.
摘要翻译：磁盘播放器具有用于沿着双面盘的两侧引导光学拾取器载体的引导构件。为了防止在将拾取器载体围绕盘的周边从盘的上侧和下侧之一转移到另一侧的转动载体周围移动期间的拾取器载体和盘周边之间的干扰，引导构件形状如马蹄铁引导构件包括用于分别沿着盘的上侧和下侧引导拾取器载体的上部和下部直段，以及围绕盘的周边垂直延伸并且连接上部和下部直线的外端的弓形部分部分。上部和下部直线段彼此不平行，而是以这样一种扇形的方式倾斜，使得外端分开较宽。

10. 发明授权

US07995445B2 Optical pickup apparatus, reproduction apparatus, and reproduction method 失效
标题翻译：光学拾取装置，再现装置和再现方法
公开(公告)号：US07995445B2
公开(公告)日：2011-08-09
申请号：US12651715
申请日：2010-01-04
申请人： Akio Yamakawa , Kenji Tanaka
发明人： Akio Yamakawa , Kenji Tanaka
IPC分类号： G11B7/00
CPC分类号： G11B7/0065 , G11B7/13 , G11B7/1381
摘要： An optical pickup apparatus includes: a light source to irradiate light onto a hologram recording medium onto which information is recorded by interference fringes of signal light and reference light; a spatial light modulation portion to generate the reference light by performing a spatial light modulation on the light from the light source; and an optical system to irradiate the reference light onto the hologram recording medium via a relay lens system and an objective lens and guide reproduction light obtained from the hologram recording medium in accordance with the irradiation of the reference light to an image pickup device via the objective lens and the relay lens system, the optical system being provided with, in an optical path between the relay lens system and the image pickup device, an angle permselective device that selectively transmits light with an incidence angle of a predetermined angle or less.
摘要翻译：光学拾取装置包括：光源，用于将信号光和参考光的干涉条纹记录在其上记录信息的全息图记录介质上; 空间光调制部分，通过对来自光源的光进行空间光调制来产生参考光; 以及光学系统，用于经由中继透镜系统和物镜将参考光照射到全息图记录介质上，并且根据通过该目的将图像拾取装置的参考光照射从全息图记录介质获得的引导再现光透镜和中继透镜系统，光学系统在中继透镜系统和图像拾取装置之间的光路中设置有选择性地透射具有预定角度或更小的入射角的光的角度选择选择装置。

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