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1. 发明授权

US08004950B2 Optical pickup, optical information recording and reproducing apparatus and method for optically recording and reproducing information 有权
标题翻译：用于光学记录和再现信息的光学拾取器，光学信息记录和再现装置和方法
公开(公告)号：US08004950B2
公开(公告)日：2011-08-23
申请号：US12038174
申请日：2008-02-27
申请人： Tatsuro Ide , Kenichi Shimada , Masahiko Takahashi , Takeshi Shimano , Kevin R. Curtis , Ken E. Anderson
发明人： Tatsuro Ide , Kenichi Shimada , Masahiko Takahashi , Takeshi Shimano , Kevin R. Curtis , Ken E. Anderson
IPC分类号： G11B7/00
CPC分类号： G11B7/00772 , G03H1/041 , G11B7/1353 , G11B7/1378
摘要： An optical pickup for recording a hologram by using an angle multiplexing method. An optical beam is separated into two beams, a signal beam and a reference beam having different convergence/divergence degrees, by using an optical component such as a diffraction lens. The signal and reference beams are made incident upon the same objective, and the optical component or the objective lens is moved in a direction perpendicular to an optical axis, to thereby realize angle multiplex recording. If an optical information recording medium is inclined, the optical component or the objective lens is moved along the direction along which the optical information recording medium moved to change an angle of the reference beam incident upon the optical information recording medium and compensate for degradation of a reproduction signal.
摘要翻译：一种用于通过使用角度复用方法记录全息图的光学拾取器。通过使用诸如衍射透镜的光学部件，将光束分离成两束，信号光束和具有不同会聚/发散度的参考光束。信号和参考光束入射到相同的物镜上，并且光学部件或物镜在垂直于光轴的方向上移动，从而实现角度多路复用记录。如果光学信息记录介质倾斜，则光学部件或物镜沿着光学信息记录介质移动的方向移动以改变入射在光学信息记录介质上的参考光束的角度并补偿光学信息记录介质的劣化再现信号。

2. 发明申请

US20100271921A1 OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING METHOD 有权
标题翻译：光信息记录介质，光信息记录/再现设备和光信息记录/再现方法
公开(公告)号：US20100271921A1
公开(公告)日：2010-10-28
申请号：US12680612
申请日：2008-08-06
申请人： Kenichi Shimada , Tatsuro Ide , Takeshi Shimano , Harukazu Miyamoto
发明人： Kenichi Shimada , Tatsuro Ide , Takeshi Shimano , Harukazu Miyamoto
IPC分类号： G11B7/00
CPC分类号： G03H1/02 , G03H1/0256 , G03H1/22 , G03H2222/56 , G03H2223/19 , G03H2223/24 , G03H2250/33 , G03H2250/42 , G11B7/0065 , G11B7/24044
摘要： A holographic recording medium in which information can be reproduced by phase conjugate beam without requiring a mirror for obtaining the phase conjugate beam and its driving part and recording density is not reduced. The recording medium includes a recording layer in which an interference pattern is recorded and a light absorption/transmission layer which can be reversibly changed to be in a first state where signal beam and reference beam passed through the recording layer are absorbed at the time of recording of information and a second state where the reference beam is transmitted at the time of reproduction of information, and the reference beam transmitted through the light absorption/transmission layer is reflected by a reflection layer to produce the phase conjugate beam.
摘要翻译：可以通过相位共轭光再现信息的全息记录介质，而不需要用于获得相位共轭光束的反射镜及其驱动部分和记录密度。记录介质包括其中记录有干涉图案的记录层和可以可逆地改变为在记录时吸收信号束和参考光束通过记录层的第一状态的光吸收/透射层的信息和在再现信息时发送参考光束的第二状态，并且通过光吸收/透射层透射的参考光束被反射层反射以产生相位共轭光束。

3. 发明授权

US07821884B2 Information recording and retrieval method, and its apparatus 有权
标题翻译：信息记录和检索方法及其装置
公开(公告)号：US07821884B2
公开(公告)日：2010-10-26
申请号：US11780058
申请日：2007-07-19
申请人： Takeshi Maeda , Takeshi Shimano , Akemi Hirotsune , Harukazu Miyamoto
发明人： Takeshi Maeda , Takeshi Shimano , Akemi Hirotsune , Harukazu Miyamoto
IPC分类号： G11B7/00
CPC分类号： G11B7/0037 , G11B7/004 , G11B7/00552 , G11B7/00736 , G11B7/0938 , G11B7/24038 , G11B2007/0013
摘要： Provided is a recording and retrieval apparatus for a multi-layer optical disk. A multi-layer optical disk in which a plurality of recording layers and a single servo layer are combined to form a set is used. A spot for the servo layer and a spot for the recording layers are turned on in a time-sharing manner. Servo signal detection areas are formed discretely in the servo layer. The servo signal detection areas and data recording areas are provided so as not to overlap each other when viewed from the spot incident side. Thus, separation of data from each of the layers can be done by even a single photodetector without interference.
摘要翻译：提供了一种用于多层光盘的记录和取回装置。使用其中组合多个记录层和单个伺服层以形成集合的多层光盘。伺服层的一个点和记录层的一个点以分时的方式被打开。伺服信号检测区域离散地形成在伺服层中。伺服信号检测区域和数据记录区域被设置成当从点入射侧观察时彼此不重叠。因此，即使单个光电检测器也可以不干扰地从每层分离数据。

4. 发明申请

US20100188961A1 Optical Disc Apparatus 有权
标题翻译：光盘装置
公开(公告)号：US20100188961A1
公开(公告)日：2010-07-29
申请号：US12754211
申请日：2010-04-05
申请人： Takeshi Shimano , Harukazu Miyamoto
发明人： Takeshi Shimano , Harukazu Miyamoto
IPC分类号： G11B7/135
CPC分类号： G11B7/1362 , G11B7/1356 , G11B7/1365
摘要： An optical disc apparatus includes a laser diode, a first optical component which branches beams from the laser diode into a first beam and a second beam, an objective lens which focuses the first beam on an optical information recording medium, an actuator which drives the objective lens in an optical axis direction, a reference mirror provided in an optical path of the second beam, an optical path length varying unit which varies an optical path length of the second beam, a first photo detector, a second photo detector, a second optical component which branches beams obtained by combining the first beam which is reflected by the optical information recording medium and the second beam which is reflected by the reference mirror and which makes the branched beams incident on the first and second photo detectors, and a signal processing part.
摘要翻译：一种光盘装置，包括激光二极管，将激光二极管分束成第一光束的第一光学部件和第二光束，将第一光束聚焦在光学信息记录介质上的物镜，驱动该物镜的致动器透镜在光轴方向上，设置在第二光束的光路中的参考镜，改变第二光束的光路长度的光程长度变化部，第一光检测器，第二光检测器，第二光检测器通过组合由光信息记录介质反射的第一光束和被参考反射镜反射并使分支光束入射在第一和第二光电检测器上的第二光束而获得的光束的分量，以及信号处理部分。

5. 发明授权

US07750276B2 Optical information detecting method, optical head, and optical disc apparatus utilizing plural photodetectors 有权
标题翻译：光信息检测方法，光头，利用多个光检测器的光盘装置
公开(公告)号：US07750276B2
公开(公告)日：2010-07-06
申请号：US11852361
申请日：2007-09-10
申请人： Harukazu Miyamoto , Hideharu Mikami , Takeshi Shimano
发明人： Harukazu Miyamoto , Hideharu Mikami , Takeshi Shimano
IPC分类号： G02B27/40
CPC分类号： G11B7/1356 , G11B7/005 , G11B7/13 , G11B2007/0013
摘要： In multilayer optical discs and high-speed optical discs, the amount of reproduction light per unit time greatly decreases and the reproduction signal quality (S/N) significantly drops due to the low effective reflectivity and the short read time of the medium. These problems are solved by causing reflected signal light from the optical disc and reference light, which is separated from the same light source and introduced into a detector without being shone onto the optical disc, to interference with each other on the detector. Detector outputs having four different interference states are simultaneously obtained, the interference states being displaced at intervals of 90° in terms of the phase relationship between the reference light and the signal. Based on a operation of the four detector outputs, a reproduction signal can be obtained that is stable at all times and amplified with high quality, even when there is an optical path length variation due to disc undulations.
摘要翻译：在多层光盘和高速光盘中，由于介质的有效反射率低和读取时间短，每单位时间的再现光量大大降低，再现信号质量（S / N）显着下降。这些问题通过使来自光盘的反射信号光和从相同光源分离并被引入检测器而不被照射到光盘上的参考光在检测器上彼此干涉来解决。同时获得具有四种不同干扰状态的检测器输出，以参考光和信号之间的相位关系为90°的间隔移位干涉状态。基于四个检测器输出的操作，即使当由于盘起伏而导致光程长度变化时，也可以始终获得稳定的高质量放大的再现信号。

6. 发明授权

US07639588B2 Optical disc drive apparatus 失效
标题翻译：光盘驱动装置
公开(公告)号：US07639588B2
公开(公告)日：2009-12-29
申请号：US11669223
申请日：2007-01-31
申请人： Shigeharu Kimura , Takeshi Shimano
发明人： Shigeharu Kimura , Takeshi Shimano
IPC分类号： G11B7/00
CPC分类号： G11B7/1367 , G11B7/131 , G11B7/1362 , G11B7/1381 , G11B7/1392 , G11B2007/0013
摘要： The amount of reflected light from an adjacent layer in a multilayer optical disc is reduced by means of a combination of half-wave plates having different optical axes and a flat mirror. The polarization direction of the reflected light from a target layer is changed without changing the polarization direction of reflected light from the adjacent layer so as to detect a signal from the target layer alone. Because no stray light is introduced into the tracking error signal or focus signal, the laser light irradiated position can be controlled with high accuracy. This makes it possible to accurately determine the laser irradiated position during reading and writing, thereby enhancing signal quality. Because no reflected light from the adjacent layer is introduced into the data signal, a data signal with reduced error can be obtained.
摘要翻译：通过具有不同光轴的半波片和平面镜的组合来减少来自多层光盘中的相邻层的反射光的量。改变来自目标层的反射光的偏振方向，而不改变来自相邻层的反射光的偏振方向，从而仅检测来自目标层的信号。由于没有杂散光被引入到跟踪误差信号或聚焦信号中，因此可以高精度地控制激光照射位置。这使得可以在读取和写入期间准确地确定激光照射位置，从而提高信号质量。由于没有将来自相邻层的反射光引入到数据信号中，所以可以获得具有减小的误差的数据信号。

7. 发明授权

US07616532B2 Optical disc drive 失效
标题翻译：光盘驱动器
公开(公告)号：US07616532B2
公开(公告)日：2009-11-10
申请号：US11529346
申请日：2006-09-29
申请人： Shigeo Nakamura , Takeshi Shimano , Masaya Horino , Irizo Naniwa , No-Cheol Park , Jeonghoon Yoo , Dong-Ju Lee , Jeseung Oh , Chul Park
发明人： Shigeo Nakamura , Takeshi Shimano , Masaya Horino , Irizo Naniwa , No-Cheol Park , Jeonghoon Yoo , Dong-Ju Lee , Jeseung Oh , Chul Park
IPC分类号： G11B7/00
CPC分类号： G11B7/08576 , G11B7/0933 , G11B7/0935
摘要： A small-sized optical disc drive includes one voice coil motor magnet within which a tracking coil and two focusing coils are disposed such that the tracking coil straddles the two poles of permanent magnets that are adjacently disposed. The two focusing coils are disposed on either side of the tracking coil, with each of the two focusing coils being only disposed over one of the permanent magnets.
摘要翻译：小型光盘驱动器包括一个音圈电动机磁体，其中设置有跟踪线圈和两个聚焦线圈，使得跟踪线圈横跨相邻设置的永磁体的两极。两个聚焦线圈设置在跟踪线圈的任一侧，两个聚焦线圈中的每一个仅设置在一个永磁体上。

8. 发明申请

US20090129238A1 OBJECTIVE LENS 审中-公开
标题翻译：物镜
公开(公告)号：US20090129238A1
公开(公告)日：2009-05-21
申请号：US12188297
申请日：2008-08-08
申请人： Takeshi Shimano , Masaki Mukoh
发明人： Takeshi Shimano , Masaki Mukoh
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B7/13925 , G11B2007/0006
摘要： A combined aspherical lens has an aspherical shape with an intermediate substrate thickness between the substrate thicknesses of a BD and an HD in a numerical aperture (NA) range for the HD, and an aspherical shape dedicated to the BD in an NA range for the BD only. The lens is designed such that wave aberration occurring through the NA range for the HD for BD reproduction has the same aberration form as but has an opposite sign to wave aberration occurring through this range for HD reproduction. Further, in the NA range for the HD, a pattern of annular transparent electrodes is optimized for a spherical aberration wavefront defocused to minimize the maximum inclination of the wave aberration. A phase shift applied is within plus or minus half wave excluding an integer wavelength of aberration.
摘要翻译：组合的非球面透镜具有非球面形状，在HD的数值孔径（NA）范围内具有在BD的基板厚度和HD之间的衬底厚度之间的中间衬底厚度，以及在BD的NA范围内专用于BD的非球面形状只要。透镜被设计成使得通过用于BD再现的HD的NA范围发生的波像差具有与HD再现的该范围所出现的波像差相同的像差形式。此外，在HD的NA范围内，环形透明电极的图案被优化用于散焦的球面像差波前，以最小化波像差的最大倾角。施加的相移在除了整数像差波长之外的正或负半波之内。

9. 发明申请

US20090052303A1 Objective optical element and optical head apparatus 审中-公开
标题翻译：物镜光学元件和光学头装置
公开(公告)号：US20090052303A1
公开(公告)日：2009-02-26
申请号：US12222886
申请日：2008-08-19
申请人： Masaki Mukoh , Takeshi Shimano
发明人： Masaki Mukoh , Takeshi Shimano
IPC分类号： G11B7/00
CPC分类号： G11B7/1369 , G11B7/13925 , G11B2007/0006
摘要： Two optical discs used with a laser light having the same wavelength but having different substrate thicknesses can be handled by a single optical disc apparatus and a multilayer optical disc can also be reproduced. A refractive lens unit and liquid crystal elements are provided so as to condense laser light on an optical disc having a thin substrate thickness with a first NA and to condense laser light on an optical disc having a thick substrate thickness with a second NA smaller than the first NA. The refractive lens unit is designed such that the amount of RMS wavefront aberration is minimized with respect to an intermediate substrate thickness between the two optical discs in the range of the second NA; and the RMS wavefront aberration is 0.05λ or less with respect to the substrate thickness of the optical disc in an area outside the second NA. A liquid crystal element for compatibility corrects spherical aberration due to the difference in substrate thickness between the two optical discs. A liquid crystal element for multilayer corrects spherical aberration based on layer selection of a multilayer optical disc.
摘要翻译：与具有相同波长但具有不同基板厚度的激光一起使用的两个光盘可以由单个光盘装置处理，并且也可以再现多层光盘。提供折射透镜单元和液晶元件，以便将激光冷凝在具有第一NA的薄的基板厚度的光盘上，并且将激光聚集在具有厚的基板厚度的光盘上，其中第二NA小于第一个NA。折射透镜单元被设计成使得在第二NA的范围内相对于两个光盘之间的中间基板厚度使RMS波前像差的量最小化; 相对于第二NA以外的区域的光盘的基板厚度，RMS波前像差为0.05λ以下。用于兼容性的液晶元件由于两个光盘之间的基板厚度的差异而校正球面像差。用于多层校正球面像差的液晶元件基于多层光盘的层选择。

10. 发明申请

US20080219109A1 INFORMATION RECORDING AND RETRIEVAL METHOD, AND ITS APPARATUS 有权
标题翻译：信息记录和检索方法及其设备
公开(公告)号：US20080219109A1
公开(公告)日：2008-09-11
申请号：US11780058
申请日：2007-07-19
申请人： Takeshi Maeda , Takeshi Shimano , Akemi Hirotsune , Harukazu Miyamoto
发明人： Takeshi Maeda , Takeshi Shimano , Akemi Hirotsune , Harukazu Miyamoto
IPC分类号： G11B7/00
CPC分类号： G11B7/0037 , G11B7/004 , G11B7/00552 , G11B7/00736 , G11B7/0938 , G11B7/24038 , G11B2007/0013
摘要： Provided is a recording and retrieval apparatus for a multi-layer optical disk. A multi-layer optical disk in which a plurality of recording layers and a single servo layer are combined to form a set is used. A spot for the servo layer and a spot for the recording layers are turned on in a time-sharing manner. Servo signal detection areas are formed discretely in the servo layer. The servo signal detection areas and data recording areas are provided so as not to overlap each other when viewed from the spot incident side. Thus, separation of data from each of the layers can be done by even a single photodetector without interference.
摘要翻译：提供了一种用于多层光盘的记录和取回装置。使用其中组合多个记录层和单个伺服层以形成集合的多层光盘。伺服层的一个点和记录层的一个点以分时的方式被打开。伺服信号检测区域离散地形成在伺服层中。伺服信号检测区域和数据记录区域被设置成当从点入射侧观察时彼此不重叠。因此，即使单个光电检测器也可以不干扰地从每层分离数据。

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