公开(公告)号：US06667947B2

公开(公告)日：2003-12-23

申请号：US09988813

申请日：2001-11-20

申请人： Takanori Maeda ,  Ikuya Kikuchi ,  Makoto Sato ,  Katsuhiro Koike ,  Yoshitsugu Araki

发明人： Takanori Maeda ,  Ikuya Kikuchi ,  Makoto Sato ,  Katsuhiro Koike ,  Yoshitsugu Araki

IPC分类号： G11B724

CPC分类号： G11B7/1374 ,  G11B7/00718 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13925 ,  G11B7/24 ,  G11B7/24038 ,  G11B11/10584 ,  G11B2007/13727

摘要： The present invention relates to an optical multi-layer information recording medium for recording information therein and/or retrieving information therefrom upon radiation of a convergent beam of light. The recording medium includes at least two pairs of recording layer and light-transmissive layer stacked one after another. A first recording layer proximal to a beam radiation side and a second recording layer distal from the beam radiation side are made from a material that satisfies a function including the following parameters; transmissivity and absorptance of the first recording layer, absorptance of the second recording layer, a numerical aperture on the first recording layer, a numerical aperture of the second recording layer, and transmissivity of between the first and second recording layers. Even if the numerical apertures change with spherical aberration compensation made to respective recording layers, a power density of a light spot does not change. Thus, recordation can be performed with consistent recording characteristics.

公开(公告)号：US06594091B2

公开(公告)日：2003-07-15

申请号：US09999195

申请日：2001-12-03

申请人： Takanori Maeda ,  Ikuya Kikuchi ,  Katsuhiro Koike ,  Makoto Sato

发明人： Takanori Maeda ,  Ikuya Kikuchi ,  Katsuhiro Koike ,  Makoto Sato

IPC分类号： G02B1318

CPC分类号： G02B27/0025 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13925

摘要： The present invention relates to an optical pickup having a constant numerical aperture even if spherical aberration is compensated for. The optical pickup is used in an information recording and/or reproducing machine. The information recording and/or reproducing machine records and/or reproduces information in a recording medium upon radiation of a light beam from a light source. The optical pickup includes a condensing optical system for condensing the light beam from the light source onto a recording layer of the recording medium. The condensing optical system includes an object lens. The condensing optical system also includes an aperture positioned about a focal length of the object lens apart from a position of a principal incidence plane of the object lens toward the light source along an optical axis of the condensing optical system.

公开(公告)号：US06501711B1

公开(公告)日：2002-12-31

申请号：US09461309

申请日：1999-12-15

申请人： Kiyoshi Tateishi ,  Mitsuru Sato ,  Ikuya Kikuchi

发明人： Kiyoshi Tateishi ,  Mitsuru Sato ,  Ikuya Kikuchi

IPC分类号： G11B700

CPC分类号： G11B7/00718 ,  G11B7/0901

摘要： A pickup drive apparatus for recording or reproducing with respect to a recording medium such as a CD and a DVD. In the apparatus, return light produced by irradiating an optical spot is detected by a photodetector, and a push-pull signal is produced from this detection output. A tracking error signal is produced from the push-pull signal by a low-pass filter and a phase compensating circuit. A quasi-ON/OFF control signal having information of an irradiation position of the optical spot is produced from the push-pull signal by a high-pass filter, a comparator, and a single pulse generator. When the quasi-ON/OFF control signal is produced which indicates that the optical spot is positioned on a groove, the tracking error signal is outputted via switching circuits in synchronism with this signal production. A pickup is servo-controlled based on this output signal.

摘要翻译： 一种用于相对于诸如CD和DVD的记录介质进行记录或再现的拾取驱动装置。 在该装置中，通过光电检测器检测通过照射光点产生的返回光，并且从该检测输出产生推挽信号。 通过低通滤波器和相位补偿电路从推挽信号产生跟踪误差信号。 通过高通滤波器，比较器和单脉冲发生器从推挽信号产生具有光点的照射位置信息的准ON / OFF控制信号。 当产生表示光点位于凹槽上的准ON / OFF控制信号时，跟踪误差信号与该信号产生同步地经由开关电路输出。 基于该输出信号对拾取器进行伺服控制。

公开(公告)号：US06339570B1

公开(公告)日：2002-01-15

申请号：US09385011

申请日：1999-08-27

申请人： Ikuya Kikuchi ,  Takanori Maeda

发明人： Ikuya Kikuchi ,  Takanori Maeda

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G01B11/06 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1374 ,  G11B7/1381 ,  G11B7/13927 ,  G11B2007/0006

摘要： A light source is provided for emitting a light beam. The light beam from the light source is applied to a recording and reproducing plane of an optical disc and to a front surface of a transparent substrate of the optical disc. A photodetector is provided for detecting return light beams from the recording and reproducing plane and the front surface. A first signal is generated based on an output signal of the photodetector dependent on the return light beam from the recording and reproducing plane, and a second signal is generated based on an output signal of the photodetector dependent on the return light beam from the front surface. A signal relating to thickness information on a thickness of the transparent substrate is produced by comparing the first and second signals with each other.

摘要翻译： 提供用于发射光束的光源。 来自光源的光束被施加到光盘的记录和再现平面以及光盘的透明基板的前表面。 提供了用于检测来自记录和再现平面和前表面的返回光束的光电检测器。 基于取决于来自记录和再现平面的返回光束的光电检测器的输出信号产生第一信号，并且基于取决于来自前表面的返回光束的光电检测器的输出信号产生第二信号 。 通过将第一和第二信号彼此进行比较来产生与透明基板的厚度有关的厚度信息的信号。

公开(公告)号：US5220544A

公开(公告)日：1993-06-15

申请号：US525012

申请日：1990-05-18

申请人： Ikuya Kikuchi ,  Ryo Sato

发明人： Ikuya Kikuchi ,  Ryo Sato

IPC分类号： G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10554 ,  G11B11/10571

摘要： A magnetic optical disk player comprises a turn table for turning a magnetic optical disk, guides for guiding a recording head carriage and an erasing head carriage along two different radial directions of the turn table, drivers for individually driving the recording head carriage and the erasing head carriage, and bias magnets for generating bias magnetic fields distributed along moving areas of the recording and erasing head carriages and having the directions opposite to each other, wherein the drivers include movable coils coupled with the recording head carriage and the erasing head carriage, drive magnets for generating drive magnetic fields interlinking the recording head coil and the erasing head coil, and a leaking flux from the drive magnets passes through the plane in the same direction of the bias magnetic field. The directions of the bias magnetic fields for erasing and recording heads are opposite to each other. The drive magnetic fields for positioning the erasing head carriage and the recording head carriage are also opposite to each other. The bias magnetic field and the drive magnetic field are additively coupled with each other.

摘要翻译： 磁性光盘播放器包括用于转动磁性光盘的转台，用于沿着转台的两个不同径向方向引导记录头托架和擦除头托架的引导件，用于单独驱动记录头托架和擦除头 滑架和偏置磁体，用于产生沿着记录和擦除头托架的移动区域分布并且具有彼此相反的方向的偏置磁场，其中驱动器包括与记录头托架和擦除头托架耦合的可动线圈，驱动磁体 用于产生将记录头线圈和擦除头线圈相互连接的驱动磁场，并且来自驱动磁体的泄漏磁通在偏置磁场的相同方向上穿过该平面。 用于擦除和记录头的偏置磁场的方向彼此相反。 用于定位擦除头托架和记录头托架的驱动磁场也彼此相对。 偏置磁场和驱动磁场彼此相加耦合。

公开(公告)号：US4901303A

公开(公告)日：1990-02-13

申请号：US226905

申请日：1988-08-01

申请人： Ikuya Kikuchi

发明人： Ikuya Kikuchi

IPC分类号： G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B17/04

CPC分类号： G11B17/041 ,  G11B11/1055

摘要： A photo-electro-magnetic disc device has a photo-electro-magnetic disc accommodated in a disc cartridge load as a unit into cartridge holder loaded in the disc device. The cartridge holder with the end of a loading mechanism moves the disc onto a turn table. An optical head and a magnetic field applying part for recording data are loaded facing opposite sides of the disc. Magnetic members are provided on the same side of the disc as is the optical head and are connected to the cartridge holder which is made of magnetic material as to confront magnetic field applying part through the disc. A magnetic circuit which includes the disc is thus formed whereby the magnetic flux from the magnetic field applying part passes through the disc thereby providing a high magnetic field strength throughout the entire region of the disc to be irradiated by a light spot from the optical head.

摘要翻译： 光电磁盘装置将容纳在作为一个单元的盘盒负载中的光电磁盘插入到装载在盘装置中的盒保持架中。 具有装载机构端部的盒架将盘移动到转台上。 用于记录数据的光学头和磁场施加部分朝向盘的相对侧被加载。 磁性构件设置在光盘头的同一侧上，并且与由磁性材料制成的盒保持器相连，以便通过盘面对磁场施加部件。 因此，形成包括盘的磁路，由此来自磁场施加部分的磁通量通过盘，从而在盘的整个区域提供高的磁场强度，以被来自光头的光点照射。

公开(公告)号：US09042021B2

公开(公告)日：2015-05-26

申请号：US14111987

申请日：2011-04-14

申请人： Takayuki Nomoto ,  Ikuya Kikuchi

发明人： Takayuki Nomoto ,  Ikuya Kikuchi

IPC分类号： G02B27/14 ,  G02B27/10 ,  G02B3/00 ,  G02B27/01 ,  G02B27/48

CPC分类号： G02B3/005 ,  G02B3/0006 ,  G02B3/0056 ,  G02B27/0101 ,  G02B27/48 ,  G02B2027/0118

摘要： An optical element includes a first microlens array unit and a second microlens array unit in each of which a plurality of microlenses are arranged. The first and second microlens array units are arranged opposite to each other with a distance which is longer than a focal length of the microlenses arranged in the first microlens array unit. The first microlens unit is arranged on a light-incident side with respect to the second microlens array unit. The interval between the microlenses arranged in the second microlens array unit is narrower than the interval between the microlenses arranged in the first microlens array unit. The optical element can appropriately suppress the occurrence of excessive pixel bright spot.

摘要翻译： 光学元件包括第一微透镜阵列单元和第二微透镜阵列单元，每个阵列单元布置有多个微透镜。 第一和第二微透镜阵列单元彼此相对布置的距离比设置在第一微透镜阵列单元中的微透镜的焦距长。 第一微透镜单元相对于第二微透镜阵列单元布置在光入射侧。 布置在第二微透镜阵列单元中的微透镜之间的间隔比布置在第一微透镜阵列单元中的微透镜之间的间隔窄。 光学元件可以适当地抑制过量像素亮点的发生。

公开(公告)号：US08422137B2

公开(公告)日：2013-04-16

申请号：US13380366

申请日：2011-02-28

申请人： Ikuya Kikuchi ,  Takayuki Nomoto

发明人： Ikuya Kikuchi ,  Takayuki Nomoto

IPC分类号： G02B27/10

CPC分类号： G02B3/0056 ,  G02B3/0068 ,  G02B27/0101 ,  G02B27/48 ,  Y10T29/49826

摘要： An optical element includes first and second microlens array units on which microlenses are arranged. The microlenses are formed by lens contour having a polygonal shape in a plan view. The first and second microlens array units are arranged opposite to each other at a position where a distance between the first and second microlens array units is at least longer than a focal distance of the microlens, and are formed so that a direction of vertices of the lens contour of the microlens arranged on the first microlens array unit is different from a direction of vertices of the lens contour of the microlens arranged on the second microlens array unit. According to the above optical element, it is possible to appropriately suppress an influence of shift of the position between the first and second microlens array units, and it becomes possible to produce the optical element with ease.

摘要翻译： 光学元件包括布置有微透镜的第一和第二微透镜阵列单元。 微透镜由平面图中具有多边形形状的透镜轮廓形成。 第一微透镜阵列单元和第二微透镜阵列单元在第一和第二微透镜阵列单元之间的距离至少长于微透镜的焦距的位置处彼此相对布置，并且形成为使得第一和第二微透镜阵列单元的顶点的方向 布置在第一微透镜阵列单元上的微透镜的透镜轮廓不同于布置在第二微透镜阵列单元上的微透镜的透镜轮廓的顶点的方向。 根据上述光学元件，可以适当地抑制第一和第二微透镜阵列单元之间的位置偏移的影响，并且可以容易地制造光学元件。

公开(公告)号：US20090059745A1

公开(公告)日：2009-03-05

申请号：US11910375

申请日：2006-02-28

申请人： Ikuya Kikuchi

发明人： Ikuya Kikuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/1376 ,  G11B7/13925 ,  G11B2007/0006

摘要： The present invention provides an optical pickup device and an information recording/playback apparatus capable of correcting aberration of an optical beam in correspondence with a plurality of recording formats of optical disks while realizing miniaturization of the device and the apparatus and reduction in manufacturing cost.A collimator lens (161) is disposed on an optical axis in correspondence with a BD. By moving the collimator lens (161) in a direction parallel with the optical axis, spherical aberration is corrected in accordance with the BD. A collimator lens (162) is disposed on an optical axis in correspondence with a CD and a DVD. By moving the collimator lens (162) in a direction parallel with the optical axis, spherical aberration is corrected in accordance with the CD and DVD. The collimator lenses are integrally held by a lens holder (163). A step motor (164) moves the lens holder (163) so that the collimator lenses (161, 162) move in directions parallel with the optical axes.

摘要翻译： 本发明提供了一种光学拾取装置和信息记录/重放装置，其能够在实现装置和装置的小型化以及降低制造成本的同时，根据光盘的多种记录格式校正光束的像差。 准直透镜（161）相对于BD设置在光轴上。 通过沿着与光轴平行的方向移动准直透镜161，根据BD校正球面像差。 准直透镜（162）相对于CD和DVD设置在光轴上。 通过沿着与光轴平行的方向移动准直透镜162，根据CD和DVD校正球面像差。 准直透镜由透镜保持器（163）一体地保持。 步进电机（164）使透镜架（163）移动，使得准直透镜（161,162）在与光轴平行的方向上移动。

公开(公告)号：US06751175B1

公开(公告)日：2004-06-15

申请号：US09458074

申请日：1999-12-10

申请人： Takanori Maeda ,  Ikuya Kikuchi

发明人： Takanori Maeda ,  Ikuya Kikuchi

IPC分类号： G11B700

CPC分类号： G11B7/1378 ,  G11B7/0956 ,  G11B7/13927 ,  G11B2007/13727

摘要： An aberration correcting device is placed in an optical path extending from a light source of an optical pickup apparatus for irradiating a light beam onto an optical disk to the optical disk. The device includes a pair of light-transmission substrates at least one of which is held freely movable in a way that a major surface thereof moves in a direction vertical to the optical path, and which have complementary curved surfaces facing, and apart from, each other. The curved surfaces are formed in such a manner as to cause the optical path length of a light beam transmitting the pair of light-transmission substrates to be changed by movement of the light-transmission substrates, thus imparting a phase difference to a transmitting light beam, while allowing the phase difference to keep an advancing direction of the light beam thereby to minimize a comatic aberration caused by the optical disk.

摘要翻译： 像差校正装置被放置在从用于将光束照射到光盘上的光学拾取装置的光源延伸到光盘的光路中。 该装置包括一对光透射基板，其中至少一个透光基板可以以其主表面沿垂直于光路的方向移动的方式保持自由移动，并且具有面对每一个的互补弯曲表面 其他。 弯曲表面形成为使得透过该透光性基板的光束的光路长度由于透光性基板的移动而变化，由此赋予发送光束的相位差 同时允许相位差保持光束的前进方向，从而最小化由光盘引起的彗形像差。